The microbiota in the gut is a large and sophisticated assemblage of microorganisms that encompasses bacteria,fungi,and other types.A growing body of recent investigations has revealed that the microbiota in the gut h...The microbiota in the gut is a large and sophisticated assemblage of microorganisms that encompasses bacteria,fungi,and other types.A growing body of recent investigations has revealed that the microbiota in the gut has the ability to control synaptic functions by means of diverse metabolic pathways.This,in turn,influences the growth,development,survival,and operation of neurons in the central nervous system.Dysbiosis of the gut microbiota has been associated with the occurrence and development of neurocognitive disorder(NCD).This article reviews the research progress of intestinal flora and NCD,and explores the role and potential mechanism of intestinal flora in the occurrence of NCD,in order to improve NCDs by regulating intestinal flora.展开更多
HIV-associated neurocognitive disorders (HAND) are chronic complications of HIV infection in the central nervous system. Clinical presentations include asymptomatic neurocognitive impairment (ANI), mild neurocognitive...HIV-associated neurocognitive disorders (HAND) are chronic complications of HIV infection in the central nervous system. Clinical presentations include asymptomatic neurocognitive impairment (ANI), mild neurocognitive impairment (MND), and HIV-associated dementia (HAD). In the era of combination antiretroviral therapy (cART), the prevalence of HAD has significantly decreased, but the rates of ANI and MND have increased, impairing patients’ daily functioning, medical adherence, employment, driving abilities, risk of HIV transmission, overall quality of life, and posing challenges to society, economy, families, and public health. This article reviews the latest research findings regarding the pathogenesis, clinical diagnosis and treatment, neuroimaging, and neuropsychological assessment of HAND, aiming to provide insights into the prevention and management of HAND.展开更多
Objective:This study aimed to identify microRNAs(miRNAs)involved in the development of perioperative neurocognitive disorders(PND).Methods:Plasma exosomal miRNA expression was examined in patients before and after car...Objective:This study aimed to identify microRNAs(miRNAs)involved in the development of perioperative neurocognitive disorders(PND).Methods:Plasma exosomal miRNA expression was examined in patients before and after cardiopulmonary bypass(CPB)using microarray and qRT-PCR and these patients were diagnosed as PND later.Elderly rats were subjected to CPB,and the cognitive functions were examined.Bioinformatics analysis was conducted to predict the targets of miR-214-3p.Rats were administered rno-miR-214-3p agomir before or after CPB to investigate the role of miR-214-3p in PND development.Results:We identified 76 differentially expressed plasma exosomal miRNAs in PND patients after surgery(P<0.05,|log2FC|>0.58),including the upregulated hsa-miR-214-3p(P=0.002399392).Prostaglandin-endoperoxide synthase 2(PTGS2)was predicted as a miR-214-3p target.In rats,CPB reduced the platform crossing numbers and target quadrant stay time,accompanied with hippocampal neuronal necrosis.The rno-miR-214-3p level was significantly increased in plasma exosomes but decreased in rat hippocampus after surgery,exhibiting a negative correlation(P<0.001,r=-0.762).A negative correlation between miR-214-3p and PTGS2 protein expression was also observed in the hippocampus after surgery.Importantly,rno-miR-214-3p agomir treatment,before or after surgery,significantly increased the platform crossing numbers(P=0.035)and target quadrant stay time(P=0.029)compared with negative control.Hippocampal PTGS2 protein level was increased in the untreated surgery group and decreased in response to rno-miR-214-3p agomir treatment before or after surgery(both P<0.05 vs.negative control).Conclusion:These data suggest that miR-214-3p/PTGS2 signaling contributes to the development of PND,serving as a potential therapeutic target for PND.展开更多
To the Editor:Despite advancements in combinational antiretroviral treatment for HIV-1,cognitive impairments are still experienced by over 50%of acquired immunodeficiency syndrome patients1.Unlike other classical form...To the Editor:Despite advancements in combinational antiretroviral treatment for HIV-1,cognitive impairments are still experienced by over 50%of acquired immunodeficiency syndrome patients1.Unlike other classical forms of neurologic dementia such as Alzheimer’s disease,HIV-associated neurocognitive disorder(HAND)predominantly manifests in younger individuals with HIV infection,which is categorized into asymptomatic neurocognitive impairment,mild neurocognitive disorder,and severe HIV-associated dementia,necessitating urgent development of effective diagnosis and treatment.展开更多
Peri-operative neurocognitive disorders(PNDs)include postoperative delirium(POD)and postoperative cognitive dysfunction(POCD).Children and the elderly are the two populations most vulnerable to the development of POD ...Peri-operative neurocognitive disorders(PNDs)include postoperative delirium(POD)and postoperative cognitive dysfunction(POCD).Children and the elderly are the two populations most vulnerable to the development of POD and POCD,which results in both high morbidity and mortality.There are many factors,including neuroinflammation and oxidative stress,that are associated with POD and POCD.General anesthesia is a major risk factor of PNDs.However,the molecular mechanisms of PNDs are poorly understood.Dexmedetomidine(DEX)is a useful sedative agent with analgesic properties,which significantly improves POCD in elderly patients.In this review,the current understanding of anesthesia in PNDs and the protective effects of DEX are summarized,and the underlying mechanisms are further discussed.展开更多
Objective:The purpose of this study was to investigate the memory and behavior-related problems of patients with neurocognitive disorders and the attitudes of their caregivers so as to provide an effective basis for n...Objective:The purpose of this study was to investigate the memory and behavior-related problems of patients with neurocognitive disorders and the attitudes of their caregivers so as to provide an effective basis for nursing interventions against such problems.Methods:The subjects were selected from patients who were under treatment or short-term hospitalization between April 2011 and March 2012.One hundred fifty-three patients with neurocognitive disorders and their major caregivers were selected from 9 grade 3 Class A hospitals of Hunan Province.The Revised Memory and Behavior Problems Checklist(RMBPC)was used to measure the memory and behavior-related problems of patients with neurocognitive disorders and the influence on their caregivers.The occurrence of different memory and behavior-related prob-lems and the distress on their caregivers was compared.Results:The RMBPC investigation showed that among 153 patients and their caregivers,152(99.3%)had memory-related problems,137(89.5%)had depression,and 136 patients(88.9%)had destructive behaviors.The incidence of memory-related problems was higher than depression and destructive behaviors(P<0.01).Caregivers bore more distress when encountering destructive behaviors(1.95±1.13 points)than memory-related problems and depression(0.91±0.76 points and 0.89±0.85 points;P<0.01).Curve fitting was used to analyze the relationship between the number of memory and behavior-related problems and the distress on their caregivers.A curve correlation existed between the two factors(the recorded maximum value of the Cubic equation curve was 0.278,F=229.212,P<0.05).Conclusion:Among patients with neurocognitive disorders,memory-related problems had the highest incidence,while the caregivers bore the strongest distress when encountering destructive behaviors,thus interventions should be conducted in consideration of patient memory and behavior-related problems,and caregivers’attitude to further reduce caregiver burden.展开更多
Background:Perioperative neurocognitive disorders(PND)are a series of severe complications in the perioperative and anesthetic periods with a decline in memory,execution ability,and information processing speed as the...Background:Perioperative neurocognitive disorders(PND)are a series of severe complications in the perioperative and anesthetic periods with a decline in memory,execution ability,and information processing speed as the primary clinical manifestation.This study aimed to evaluate the impact of edaravone(EDA)on PND and peripheral blood C-X-C motif chemokine ligand 13(CXCL13)levels in elderly patients with hip replacement.Methods:A total of 160 elderly patients undergoing hip arthroplasty in Affiliated Dongguan People’s Hospital of Southern Medical University(from March 2016 to March 2018)were randomly and double-blindly categorized into an EDA group and a control group(CON).Group EDA was administered intravenously EDA 30 min before surgery,and group CON was administered intravenously saline.The cognitive function of the two groups was evaluated 1-day before the operation and at 1 and 12 months after surgery,and the incidence of post-operative delirium was tested on days 1,3,and 7 after surgery using the Chinese version of the confusion assessment method.Serum CXCL13 and interleukin(IL)-6 concentrations were measured before anesthesia,during surgery(30 min after skin incision),and on days 1,3,and 7 after surgery.The continuous variables in accordance with normal distribution were tested using the Student’s t test,the continuous variables without normal distribution using the Mann-Whitney U test,and categorical variables by the x 2 test or Fisher exact test.Results:The incidence of post-operative delirium within 7 days after surgery was significantly higher in group CON than that in group EDA(31.3%vs.15.0%,t=-5.6,P<0.001).The modifiedtelephone interview for cognitive status andactivities of daily life scores were significantly higher in the group EDA than those in the group CON at 1 month(39.63±4.35 vs.33.63±5.81,t=-2.13,P<0.05and 74.3±12.6 vs.61.2±13.1,t=-1.69,P<0.05)and 12 months(40.13±5.93 vs.34.13±5.36,t=-3.37,P<0.05 and 79.6±11.7 vs.65.6±16.6,t=-2.08,P<0.05)after surgery;and the incidence of neurocognitive dysfunction was significantly lower in the group EDA than that in the group CON(P<0.05).Serum CXCL13 and IL-6 concentrations were significantly lower in the group EDA than those in the group CON during and after surgery(P<0.05).Conclusion:EDA can significantly reduce the serum concentrations of CXCL13 and IL-6 and improve the PND of patients.展开更多
The intravenous use of nalmefene has been found to exert neuroprotective effect in patients with severe traumatic brain injury and acute cerebral infarction;nonetheless,it is unknown whether nalmefene alleviates delay...The intravenous use of nalmefene has been found to exert neuroprotective effect in patients with severe traumatic brain injury and acute cerebral infarction;nonetheless,it is unknown whether nalmefene alleviates delayed neurocognitive recovery.Our purpose of the current research was to clarify the impact of nalmefene on delayed neurocognitive recovery in aged patients experiencing video-assisted thoracic surgery(VATS)with intraoperative use of one lung ventilation(OLV).The present study involved 120 paticents undergoing selective VATS,randomized to accept low-dose nalmefene(N1 group,n=40),high-dose nalmefene(N2 group,1n=40)or equal volume of physiologic saline(control group,1=40).A battery of neuropsychological tests were used to estimate cognitive function I day before surgery(o)and 10 days after surgery or before discharge(t).Regional cerebral oxygen saturation(rSO2)was detected 5 min before induction(t),5 min after induction(1),15 and 60 min after onset of OLV(62 and 13),and 15 min after termination of OLV(4).The plasma values of interleukin(IL)-1β,IL-6,tumor necrosis factor(TNF)-a1 and adiponectin(ADP)were also detected prior to induction of anesthesia(T0),1 h,2 h and 6 h after surgery(TI,T2,T3).On 1,delayed neurocognitive recovery occurred in 5/40(12.5%)patients of NI group,in 5/40(12.5%)patients of N2 group and in 13/40(32.5%)patients of control group(P<0.05).There were no statistical differences in rSO2 among three groups at different time points.At Tl,T2 and T3,IL-1β,IL-6 and TNF-a values significantly increased and ADP value significantly decreased(P<0.05)in control group.In contrast,at TI,T2 and T3,IL-1β,IL-6 and TNF-a values decreased and ADP value decreased less in N1 and N2 groups(P<0.05).At TI,T2 and T3,IL-1β,IL-6 and TNF-a concentrations presented a trend of N2 group<N1 group<control group and ADP presented a trend of N2 group>Nl group>control group(P<0.05).The result of our present research supports the hypothesis that the perioperative intravenous treatment with nalmefene to VATS with OLV ameliorates postoperative cognitive function and decreases the incidence of delayed neurocognitive recovery,most likely by suppression of inflammatory responses.展开更多
Objectives:Although effective antiretroviral therapy(ART)has been used for more than two decades,HIV-associated neurocognitive disorder remains prevalent.Thus,whether ART can improve neurocognitive impairment is contr...Objectives:Although effective antiretroviral therapy(ART)has been used for more than two decades,HIV-associated neurocognitive disorder remains prevalent.Thus,whether ART can improve neurocognitive impairment is controversial.This review aims to explore the effects of ART on cognitive impairment in people living with HIV(PLWH).Methods:A systematic literature search was conducted in eight databases(PubMed,Embase,Web of Science,Cochrane Library,CNKI,VIP,China Biology Medicine disc,and WanFang)to identify studies that compare cognitive function between study groups who are administered and not administered ART.We searched for articles published up to April 2019.Article evaluation and data extraction were independently conducted by two reviewers.Results:Sixteen articles(6,694 participants)-14 cross-sectional studies and 2 cohort studies—were included in this meta-analysis.The cross-sectional studies demonstrated that ART group did not perform better than the non-ART group(OR=1.16;95%CI,1.03-1.30).However,the cohort studies reported a significant improvement in cognitive function at three months(OR=4.01;95%CI,2.35-6.85)and six months(OR=9.24;95%CI,1.71-49.96)after ART initiation compared with the baseline data.No significant cognitive improvement was found in participants younger than 55 years old,but the two crosssectional studies showed that ART may improve cognitive function in PLWH under 65 years old with poor physical condition and immune status.Conclusions:ART could improve cognitive function in PLWH with poor physical condition and immune status,but it does not considerably improve cognition in the entire PLWH population.展开更多
Infection with HIV is one of the deadliest epidemics of our time and its type is widespread in the Central African Republic. It is frequently accompanied by neurological complications. Objective: To contribute to a be...Infection with HIV is one of the deadliest epidemics of our time and its type is widespread in the Central African Republic. It is frequently accompanied by neurological complications. Objective: To contribute to a better understanding of neurocognitive disorders in patients living with HIV (PLHIV) in Bangui, and to identify associated factors using the International HIV Dementia Scale (IHDS) as a screening tool. We conducted a descriptive and analytical cross-sectional study from 1 December 2014 to 30 January 2015, in a cohort of patients seen on one of the supported sites in Bangui. A total of 400 patients were received in follow-up visit during the study period of which 244 met the inclusion criteria. The prevalence of neurocognitive disorders was 25%, 95% CI [19.70 - 30.92]. The mean age of subjects was 42.77 ± 9.58 with extremes ranging from 24 - 64 years. The sex ratio (F/M) was 4.5 in. The average score for different tests was 10.93 ± 1.13 with extremes of 7 and 12. The disorder was more about the gestural sequence. Determinants of neurocognitive disorders in the cohort were older age and lower educational level (p < 0.05). It is useful to conduct further studies to confirm these results by combining a battery of neuropsychological tests to recommend this test for all the support sites of PLHIV in the country.展开更多
BACKGROUND Blink and masseter reflexes provide reliable,quantifiable data on the function of the central nervous system:Delayed latencies have been found in patients with neurocognitive disorder(ND)and type 2 diabetes...BACKGROUND Blink and masseter reflexes provide reliable,quantifiable data on the function of the central nervous system:Delayed latencies have been found in patients with neurocognitive disorder(ND)and type 2 diabetes mellitus(T2DM),but this has not been studied in patients with both pathologies.AIM To investigate if older adults with ND plus T2DM have prolonged latencies of blink and masseter-reflex and if they were associated with disease progression.METHODS This cross-sectional study included 227 older adults(>60 years)from Colima,Mexico.Neurocognitive disorder was identified by a neuropsychological battery test,and T2DM identified by medical history,fasting glucose,and glycosylated hemoglobin.Latencies in the early reflex(R1),ipsilateral late(R2),and contralateral late(R2c)components of the blink reflex were analyzed for all subjects,and 183 subjects were analyzed for latency of the masseter reflex.RESULTS In 20.7%of participants,ND was detected.In 37%,T2DM was detected.Latencies in R1,R2,and R2c were significantly prolonged for groups with ND plus T2DM,ND,and T2DM,compared with the control group(P<0.0001).The masseter reflex was only prolonged in older adults(regardless of T2DM status)with ND vs controls(P=0.030).In older adults with ND and without T2DM,the more the cognitive impairment progressed,the more prolonged latencies in R2 and R2c presented(P<0.01).CONCLUSION These findings suggest that blink and masseter reflexes could be used to evaluate possible changes in brainstem circuits in older adults with ND and T2DM.展开更多
Background Prevalence of neurocognitive disorder with Lewy bodies （NCDLB） is low in Asian populations, which may partially refect its diagnostic diffculty. The Mayo Fluctuations Scale, a short questionnaire that ev...Background Prevalence of neurocognitive disorder with Lewy bodies （NCDLB） is low in Asian populations, which may partially refect its diagnostic diffculty. The Mayo Fluctuations Scale, a short questionnaire that evaluates cognitive fuctuation, has been shown to signifcantly differentiate NCDLB from Alzheimer＇s disease.Aim This study aimed to develop the Mayo Fluctuations Scale-Thai version and assess its validity to screen NCDLB in an elderly population.Methods The Mayo Fluctuations Scale was translated into Thai. The process involved back-translation, cross-cultural adaptation, feld testing of the prefnal version, as well as fnal adjustments. From all patients attending the Psychiatric and Memory Clinic at Ramathibodi Hospital, 135 patients accompanied by their primary caregivers were included. Caregivers were interviewed by research assistants using a four-item scale, and psychiatrists determined patients＇ diagnosis based on the diagnostic and statistical manual of mental disorders （DSM）-5 criteria. Evaluations performed by psychiatrists and research assistants were blinded.Results Seventeen participants had been diagnosed with major NCDLB. At a cut-off score of 2 or over, the Mayo Fluctuations Scale exhibited excellent performance to differentiate major NCDLB from other major neurocognitive disorders （NCDs）, with a sensitivity of 94.1% and a specifcity of 71.4%, and acceptable performance to differentiate mild NCDLB from other mild NCDs, with a sensitivity of 60% and a specifcity of 93.1%.Conclusion The Mayo Fluctuations Scale-Thai version is an excellent screening tool for major NCDLB and an acceptable tool that may be used with other additional tests for mild NCDLB. The tool is practical for use in memory and psychiatric clinics. Further validation studies in participants with other specifc clinical conditions are required.展开更多
The global trend of population aging poses significant challenges to society and healthcare systems,particularly because of neurocognitive disorders(NCDs)such as Parkinson's disease(PD)and Alzheimer's disease(...The global trend of population aging poses significant challenges to society and healthcare systems,particularly because of neurocognitive disorders(NCDs)such as Parkinson's disease(PD)and Alzheimer's disease(AD).In this context,artificial intelligence techniques have demonstrated promising potential for the objective assessment and detection of NCDs.Multimodal contactless screening technologies,such as speech-language processing,computer vision,and virtual reality,offer efficient and convenient methods for disease diagnosis and progression tracking.This paper systematically reviews the specific methods and applications of these technologies in the detection of NCDs using data collection paradigms,feature extraction,and modeling approaches.Additionally,the potential applications and future prospects of these technologies for the detection of cognitive and motor disorders are explored.By providing a comprehensive summary and refinement of the extant theories,methodologies,and applications,this study aims to facilitate an in-depth understanding of these technologies for researchers,both within and outside the field.To the best of our knowledge,this is the first survey to cover the use of speech-language processing,computer vision,and virtual reality technologies for the detection of NSDs.展开更多
The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental challenges.In the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an impo...The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental challenges.In the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an important component of the hypothalamicpituitary-a d renal axis's negative feedback loop and plays a key role in regulating cognitive equilibrium and neuroplasticity.The glucoco rticoid receptor influences cognitive processes,including glutamate neurotransmission,calcium signaling,and the activation of brain-derived neurotrophic factor-mediated pathways,through a combination of genomic and non-genomic mechanisms.Protein interactions within the central nervous system can alter the expression and activity of the glucocorticoid receptor,there by affecting the hypothalamic-pituitary-a d renal axis and stress-related cognitive functions.An appropriate level of glucocorticoid receptor expression can improve cognitive function,while excessive glucocorticoid receptors or long-term exposure to glucoco rticoids may lead to cognitive impairment.Patients with cognitive impairment-associated diseases,such as Alzheimer's disease,aging,depression,Parkinson's disease,Huntington's disease,stroke,and addiction,often present with dysregulation of the hypothalamic-pituitary-adrenal axis and glucocorticoid receptor expression.This review provides a comprehensive overview of the functions of the glucoco rticoid receptor in the hypothalamic-pituitary-a d renal axis and cognitive activities.It emphasizes that appropriate glucocorticoid receptor signaling fa cilitates learning and memory,while its dysregulation can lead to cognitive impairment.This provides clues about how glucocorticoid receptor signaling can be targeted to ove rcome cognitive disability-related disorders.展开更多
Objective:According to the World Health Organization,the number of infected people with human immunodeficiency virus(HIV)in 2019 was about 38 million.Using combinational antiretroviral therapy in recent years has incr...Objective:According to the World Health Organization,the number of infected people with human immunodeficiency virus(HIV)in 2019 was about 38 million.Using combinational antiretroviral therapy in recent years has increased life expectancy in these people and HIV has been changed from a deadly disease to a chronic one.HIV-associated neurological disorders(HAND)include asymptomatic neurological disorders,Motor neurological disorders,and HIV-associated dementia.Methods:We searched 3 databases(PubMed,Science Direct and Scopus databases)from January 2015 to March 2021 for the keywords;HIV associated with a neurocognitive disorder,HAND and combinational antiretroviral therapy to provide careful consideration of various aspects of these disorders,including;risk factors,their diagnostic methods,their epidemiology,and finally the treatment of HAND.Results:In the initial search,we came across 1351 articles.Three authors did the title-abstract screening,and 270 articles were entered into full-text screening from the previous step.Four authors did the full-text screening,and the screening outcome was 21 articles.We categorized the results of our study into sub-categories,including:risk factors,pathogenicity,clinical manifestations,diagnosis,and epidemiology of HAND.Conclusions:Although the HAND subheading has made great strides,many questions about the disease remain unanswered,and many of the diagnosing established methods are not 100%accurate and as a result of that,this epidemy can’t be fully endured yet.We hope to find and apply further advances and more definitive solutions in the coming decades.展开更多
Our previous studies have shown that infection with the gp120 V3 loop can cause human immunodeficiency virus-1 associated neurocognitive disorders. Curcumin has been shown to improve these effects to some degree, but ...Our previous studies have shown that infection with the gp120 V3 loop can cause human immunodeficiency virus-1 associated neurocognitive disorders. Curcumin has been shown to improve these effects to some degree, but the precise mechanisms remain unknown. The present study analyzed the neuroprotective effect and mechanism of curcumin in relation to hippocampal neurons. Results showed that 1 nmol/L gp120 V3 loop suppressed the growth of synapses. After administration of 1 !umol/L curcumin, synaptic growth improved. Curcumin is neuroprotective against gp120 V3 loop-induced neuronal damage by inhibiting the activation of L-type calcium currents, relieving intracellular Ca^2＋ overload, promoting Bcl-2 expression, and inhibiting Bax activation. The effect of curcumin was identical to nimodipine, suggesting that curcumin has the same neuroprotective effects against gp120 V3 loop-induced neuronal damage.展开更多
General anesthetic agents can impact brain function through interactions with neurons and their effects on glial cells.Oligodendrocytes perform essential roles in the central nervous system,including myelin sheath for...General anesthetic agents can impact brain function through interactions with neurons and their effects on glial cells.Oligodendrocytes perform essential roles in the central nervous system,including myelin sheath formation,axonal metabolism,and neuroplasticity regulation.They are particularly vulnerable to the effects of general anesthetic agents resulting in impaired proliferation,differentiation,and apoptosis.Neurologists are increasingly interested in the effects of general anesthetic agents on oligodendrocytes.These agents not only act on the surface receptors of oligodendrocytes to elicit neuroinflammation through modulation of signaling pathways,but also disrupt metabolic processes and alter the expression of genes involved in oligodendrocyte development and function.In this review,we summarize the effects of general anesthetic agents on oligodendrocytes.We anticipate that future research will continue to explore these effects and develop strategies to decrease the incidence of adverse reactions associated with the use of general anesthetic agents.展开更多
Despite the success of combined antiretroviral therapy in recent years, the prevalence of human immunodeficiency virus(HIV)-associated neurocognitive disorders in people living with HIV-1 is increasing, significantly ...Despite the success of combined antiretroviral therapy in recent years, the prevalence of human immunodeficiency virus(HIV)-associated neurocognitive disorders in people living with HIV-1 is increasing, significantly reducing the healthrelated quality of their lives. Although neurons cannot be infected by HIV-1, shed viral proteins such as transactivator of transcription(Tat) can cause dendritic damage. However, the detailed molecular mechanism of Tat-induced neuronal impairment remains unknown. In this study, we first showed that recombinant Tat(1–72 aa) induced neurotoxicity in primary cultured mouse neurons. Second, exposure to Tat_(1–72) was shown to reduce the length and number of dendrites in cultured neurons. Third, Tat_(1–72)(0–6 h) modulates protein phosphatase 1(PP1) expression and enhances its activity by decreasing the phosphorylation level of PP1 at Thr320. Finally, Tat_(1–72)(24 h) downregulates CREB activity and CREBmediated gene(BDNF, c-fos, Egr-1) expression. Together, these findings suggest that Tat_(1–72) might impair cognitive function by regulating the activity of PP1 and the CREB/BDNF pathway.展开更多
Objective: Some studies have investigated the association between oral microbiome and mild cognitive impairment (MCI). However, there needs to be more narrative reviews synthesizing this evidence. This study aimed to ...Objective: Some studies have investigated the association between oral microbiome and mild cognitive impairment (MCI). However, there needs to be more narrative reviews synthesizing this evidence. This study aimed to bridge this gap in the current knowledge. Methods: A comprehensive search was conducted on PubMed (MEDLINE) to identify studies examining the association between the oral microbiome and MCI. Search parameters and inclusion criteria were clearly defined, encompassing terms related to the oral microbiome, MCI, and their association. Two authors independently selected relevant studies and performed data extraction. Result: Four studies were included. Two cohort studies and two case-control reported an association between the oral microbiome and MCI. Conclusion: Based on the evidence synthesized from the included studies, the review suggests an association between MCI and the oral microbiome. Specifically, all included studies identified significant differences in the abundance of specific microbial species between individuals with MCI and those with normal cognitive function, underscoring the potential role of these species in neuroinflammatory diseases.展开更多
A study was made to determine whether HIV-infected patients with prolonged virological control suffer subclinical neurocognitive problems capable of interfering with driving skills, compared with the general populatio...A study was made to determine whether HIV-infected patients with prolonged virological control suffer subclinical neurocognitive problems capable of interfering with driving skills, compared with the general population, and to explore the possible existence of differences between those treated with and without efavirenz. Material and Methods: We included 40 patients without history of neoplasm, psychiatric disorders or infections of the central nervous system associated or not to HIV, with stable and effective antiretroviral therapy during at least 48 months. Use was made of the ASDE DRIVER TEST N-845 standardized by the Spanish traffic authorities, and for which data corresponding to the Spanish general population were obtained from the manufacturer of the test battery. The Student t-test was used to compare the different variables with the population standards, and the comparison of proportions Z-statistic was used to determine the proportion of subjects above the accepted limit of normality cutoff point. These analyses were replicated for the two sub-samples (with or without efavirenz therapy), with a 95% confidence level. The SPSS version 15 statistical package and Epidat 3.1 program were used. Results: The scores obtained in the HIV group were significantly poorer in the anticipation speed tests and in one of the multiple reactions test, though better results were obtained in the bimanual visual-motor coordination test. There were no differences in the percentages of patients with scores below the recommended limits. On comparing the treatment subgroups (efavirenz versus protease inhibitor), no differences were recorded in any of the study variables, and the differences with respect to the general population were the same as those described for the global group. Conclusions: Little differences were observed in driving skills in HIV well controlled HIV patients of minor clinical significance, and no differences were found in driving skills between the patients administered Efavirenz and those receiving protease inhibitor treatments.展开更多
基金supported by the Scientific Research Plan Project of Anhui Province of China,No.2022AH020076Natural Science Foundation of Anhui Province of China,No.2208085Y32the Chen Xiao-Ping Foundation for the Development of Science and Technology of Hubei Province,No.CXPJJH12000005-07-115(all to CT).
文摘The microbiota in the gut is a large and sophisticated assemblage of microorganisms that encompasses bacteria,fungi,and other types.A growing body of recent investigations has revealed that the microbiota in the gut has the ability to control synaptic functions by means of diverse metabolic pathways.This,in turn,influences the growth,development,survival,and operation of neurons in the central nervous system.Dysbiosis of the gut microbiota has been associated with the occurrence and development of neurocognitive disorder(NCD).This article reviews the research progress of intestinal flora and NCD,and explores the role and potential mechanism of intestinal flora in the occurrence of NCD,in order to improve NCDs by regulating intestinal flora.
文摘HIV-associated neurocognitive disorders (HAND) are chronic complications of HIV infection in the central nervous system. Clinical presentations include asymptomatic neurocognitive impairment (ANI), mild neurocognitive impairment (MND), and HIV-associated dementia (HAD). In the era of combination antiretroviral therapy (cART), the prevalence of HAD has significantly decreased, but the rates of ANI and MND have increased, impairing patients’ daily functioning, medical adherence, employment, driving abilities, risk of HIV transmission, overall quality of life, and posing challenges to society, economy, families, and public health. This article reviews the latest research findings regarding the pathogenesis, clinical diagnosis and treatment, neuroimaging, and neuropsychological assessment of HAND, aiming to provide insights into the prevention and management of HAND.
基金supported by grantsfrom the Department of Human Resources and Social Security of Sichuan Province(No.19058)the subject of Health Commission of Sichuan Province(No.20PJ130)+2 种基金the Science and Technology Strategic Cooperation Programs of Luzhou Municipal People's Government and Southwest Medical University(No.2019LZXNYDJ36)the subject of Affiliated Hospital of Southwest Medical University(No.2017-PT-45)the Doctoral Research Initiation Fund of Affiliated Hospital of Southwest Medical University(No.19023).
文摘Objective:This study aimed to identify microRNAs(miRNAs)involved in the development of perioperative neurocognitive disorders(PND).Methods:Plasma exosomal miRNA expression was examined in patients before and after cardiopulmonary bypass(CPB)using microarray and qRT-PCR and these patients were diagnosed as PND later.Elderly rats were subjected to CPB,and the cognitive functions were examined.Bioinformatics analysis was conducted to predict the targets of miR-214-3p.Rats were administered rno-miR-214-3p agomir before or after CPB to investigate the role of miR-214-3p in PND development.Results:We identified 76 differentially expressed plasma exosomal miRNAs in PND patients after surgery(P<0.05,|log2FC|>0.58),including the upregulated hsa-miR-214-3p(P=0.002399392).Prostaglandin-endoperoxide synthase 2(PTGS2)was predicted as a miR-214-3p target.In rats,CPB reduced the platform crossing numbers and target quadrant stay time,accompanied with hippocampal neuronal necrosis.The rno-miR-214-3p level was significantly increased in plasma exosomes but decreased in rat hippocampus after surgery,exhibiting a negative correlation(P<0.001,r=-0.762).A negative correlation between miR-214-3p and PTGS2 protein expression was also observed in the hippocampus after surgery.Importantly,rno-miR-214-3p agomir treatment,before or after surgery,significantly increased the platform crossing numbers(P=0.035)and target quadrant stay time(P=0.029)compared with negative control.Hippocampal PTGS2 protein level was increased in the untreated surgery group and decreased in response to rno-miR-214-3p agomir treatment before or after surgery(both P<0.05 vs.negative control).Conclusion:These data suggest that miR-214-3p/PTGS2 signaling contributes to the development of PND,serving as a potential therapeutic target for PND.
基金supported by Natural Science Foundation of China(82073898,82130101,82072276,and 82070083)Major Scientific And Technological Projects of Guangdong Province(2023B1111050008m,China)+1 种基金Science and Technology Innovation Project of Guangdong Provincial Drug Administration(2022ZDZ08,China)China Postdoctoral Science Foundation(2023M741601).
文摘To the Editor:Despite advancements in combinational antiretroviral treatment for HIV-1,cognitive impairments are still experienced by over 50%of acquired immunodeficiency syndrome patients1.Unlike other classical forms of neurologic dementia such as Alzheimer’s disease,HIV-associated neurocognitive disorder(HAND)predominantly manifests in younger individuals with HIV infection,which is categorized into asymptomatic neurocognitive impairment,mild neurocognitive disorder,and severe HIV-associated dementia,necessitating urgent development of effective diagnosis and treatment.
基金the grants from the National Natural Science Foundation of China to WS(82150710557,82293642).
文摘Peri-operative neurocognitive disorders(PNDs)include postoperative delirium(POD)and postoperative cognitive dysfunction(POCD).Children and the elderly are the two populations most vulnerable to the development of POD and POCD,which results in both high morbidity and mortality.There are many factors,including neuroinflammation and oxidative stress,that are associated with POD and POCD.General anesthesia is a major risk factor of PNDs.However,the molecular mechanisms of PNDs are poorly understood.Dexmedetomidine(DEX)is a useful sedative agent with analgesic properties,which significantly improves POCD in elderly patients.In this review,the current understanding of anesthesia in PNDs and the protective effects of DEX are summarized,and the underlying mechanisms are further discussed.
文摘Objective:The purpose of this study was to investigate the memory and behavior-related problems of patients with neurocognitive disorders and the attitudes of their caregivers so as to provide an effective basis for nursing interventions against such problems.Methods:The subjects were selected from patients who were under treatment or short-term hospitalization between April 2011 and March 2012.One hundred fifty-three patients with neurocognitive disorders and their major caregivers were selected from 9 grade 3 Class A hospitals of Hunan Province.The Revised Memory and Behavior Problems Checklist(RMBPC)was used to measure the memory and behavior-related problems of patients with neurocognitive disorders and the influence on their caregivers.The occurrence of different memory and behavior-related prob-lems and the distress on their caregivers was compared.Results:The RMBPC investigation showed that among 153 patients and their caregivers,152(99.3%)had memory-related problems,137(89.5%)had depression,and 136 patients(88.9%)had destructive behaviors.The incidence of memory-related problems was higher than depression and destructive behaviors(P<0.01).Caregivers bore more distress when encountering destructive behaviors(1.95±1.13 points)than memory-related problems and depression(0.91±0.76 points and 0.89±0.85 points;P<0.01).Curve fitting was used to analyze the relationship between the number of memory and behavior-related problems and the distress on their caregivers.A curve correlation existed between the two factors(the recorded maximum value of the Cubic equation curve was 0.278,F=229.212,P<0.05).Conclusion:Among patients with neurocognitive disorders,memory-related problems had the highest incidence,while the caregivers bore the strongest distress when encountering destructive behaviors,thus interventions should be conducted in consideration of patient memory and behavior-related problems,and caregivers’attitude to further reduce caregiver burden.
基金supported by the grant from the Projects of Guangdong Medical Science and Technology Research Foundation(No.C2018055).
文摘Background:Perioperative neurocognitive disorders(PND)are a series of severe complications in the perioperative and anesthetic periods with a decline in memory,execution ability,and information processing speed as the primary clinical manifestation.This study aimed to evaluate the impact of edaravone(EDA)on PND and peripheral blood C-X-C motif chemokine ligand 13(CXCL13)levels in elderly patients with hip replacement.Methods:A total of 160 elderly patients undergoing hip arthroplasty in Affiliated Dongguan People’s Hospital of Southern Medical University(from March 2016 to March 2018)were randomly and double-blindly categorized into an EDA group and a control group(CON).Group EDA was administered intravenously EDA 30 min before surgery,and group CON was administered intravenously saline.The cognitive function of the two groups was evaluated 1-day before the operation and at 1 and 12 months after surgery,and the incidence of post-operative delirium was tested on days 1,3,and 7 after surgery using the Chinese version of the confusion assessment method.Serum CXCL13 and interleukin(IL)-6 concentrations were measured before anesthesia,during surgery(30 min after skin incision),and on days 1,3,and 7 after surgery.The continuous variables in accordance with normal distribution were tested using the Student’s t test,the continuous variables without normal distribution using the Mann-Whitney U test,and categorical variables by the x 2 test or Fisher exact test.Results:The incidence of post-operative delirium within 7 days after surgery was significantly higher in group CON than that in group EDA(31.3%vs.15.0%,t=-5.6,P<0.001).The modifiedtelephone interview for cognitive status andactivities of daily life scores were significantly higher in the group EDA than those in the group CON at 1 month(39.63±4.35 vs.33.63±5.81,t=-2.13,P<0.05and 74.3±12.6 vs.61.2±13.1,t=-1.69,P<0.05)and 12 months(40.13±5.93 vs.34.13±5.36,t=-3.37,P<0.05 and 79.6±11.7 vs.65.6±16.6,t=-2.08,P<0.05)after surgery;and the incidence of neurocognitive dysfunction was significantly lower in the group EDA than that in the group CON(P<0.05).Serum CXCL13 and IL-6 concentrations were significantly lower in the group EDA than those in the group CON during and after surgery(P<0.05).Conclusion:EDA can significantly reduce the serum concentrations of CXCL13 and IL-6 and improve the PND of patients.
基金This study was supported by grants from the Innovation Foundation of Health and Family Planning Commission of Hubei Province(No.WJ2017M036)the National Natural Science Foundation of China(No.81471858).
文摘The intravenous use of nalmefene has been found to exert neuroprotective effect in patients with severe traumatic brain injury and acute cerebral infarction;nonetheless,it is unknown whether nalmefene alleviates delayed neurocognitive recovery.Our purpose of the current research was to clarify the impact of nalmefene on delayed neurocognitive recovery in aged patients experiencing video-assisted thoracic surgery(VATS)with intraoperative use of one lung ventilation(OLV).The present study involved 120 paticents undergoing selective VATS,randomized to accept low-dose nalmefene(N1 group,n=40),high-dose nalmefene(N2 group,1n=40)or equal volume of physiologic saline(control group,1=40).A battery of neuropsychological tests were used to estimate cognitive function I day before surgery(o)and 10 days after surgery or before discharge(t).Regional cerebral oxygen saturation(rSO2)was detected 5 min before induction(t),5 min after induction(1),15 and 60 min after onset of OLV(62 and 13),and 15 min after termination of OLV(4).The plasma values of interleukin(IL)-1β,IL-6,tumor necrosis factor(TNF)-a1 and adiponectin(ADP)were also detected prior to induction of anesthesia(T0),1 h,2 h and 6 h after surgery(TI,T2,T3).On 1,delayed neurocognitive recovery occurred in 5/40(12.5%)patients of NI group,in 5/40(12.5%)patients of N2 group and in 13/40(32.5%)patients of control group(P<0.05).There were no statistical differences in rSO2 among three groups at different time points.At Tl,T2 and T3,IL-1β,IL-6 and TNF-a values significantly increased and ADP value significantly decreased(P<0.05)in control group.In contrast,at TI,T2 and T3,IL-1β,IL-6 and TNF-a values decreased and ADP value decreased less in N1 and N2 groups(P<0.05).At TI,T2 and T3,IL-1β,IL-6 and TNF-a concentrations presented a trend of N2 group<N1 group<control group and ADP presented a trend of N2 group>Nl group>control group(P<0.05).The result of our present research supports the hypothesis that the perioperative intravenous treatment with nalmefene to VATS with OLV ameliorates postoperative cognitive function and decreases the incidence of delayed neurocognitive recovery,most likely by suppression of inflammatory responses.
文摘Objectives:Although effective antiretroviral therapy(ART)has been used for more than two decades,HIV-associated neurocognitive disorder remains prevalent.Thus,whether ART can improve neurocognitive impairment is controversial.This review aims to explore the effects of ART on cognitive impairment in people living with HIV(PLWH).Methods:A systematic literature search was conducted in eight databases(PubMed,Embase,Web of Science,Cochrane Library,CNKI,VIP,China Biology Medicine disc,and WanFang)to identify studies that compare cognitive function between study groups who are administered and not administered ART.We searched for articles published up to April 2019.Article evaluation and data extraction were independently conducted by two reviewers.Results:Sixteen articles(6,694 participants)-14 cross-sectional studies and 2 cohort studies—were included in this meta-analysis.The cross-sectional studies demonstrated that ART group did not perform better than the non-ART group(OR=1.16;95%CI,1.03-1.30).However,the cohort studies reported a significant improvement in cognitive function at three months(OR=4.01;95%CI,2.35-6.85)and six months(OR=9.24;95%CI,1.71-49.96)after ART initiation compared with the baseline data.No significant cognitive improvement was found in participants younger than 55 years old,but the two crosssectional studies showed that ART may improve cognitive function in PLWH under 65 years old with poor physical condition and immune status.Conclusions:ART could improve cognitive function in PLWH with poor physical condition and immune status,but it does not considerably improve cognition in the entire PLWH population.
文摘Infection with HIV is one of the deadliest epidemics of our time and its type is widespread in the Central African Republic. It is frequently accompanied by neurological complications. Objective: To contribute to a better understanding of neurocognitive disorders in patients living with HIV (PLHIV) in Bangui, and to identify associated factors using the International HIV Dementia Scale (IHDS) as a screening tool. We conducted a descriptive and analytical cross-sectional study from 1 December 2014 to 30 January 2015, in a cohort of patients seen on one of the supported sites in Bangui. A total of 400 patients were received in follow-up visit during the study period of which 244 met the inclusion criteria. The prevalence of neurocognitive disorders was 25%, 95% CI [19.70 - 30.92]. The mean age of subjects was 42.77 ± 9.58 with extremes ranging from 24 - 64 years. The sex ratio (F/M) was 4.5 in. The average score for different tests was 10.93 ± 1.13 with extremes of 7 and 12. The disorder was more about the gestural sequence. Determinants of neurocognitive disorders in the cohort were older age and lower educational level (p < 0.05). It is useful to conduct further studies to confirm these results by combining a battery of neuropsychological tests to recommend this test for all the support sites of PLHIV in the country.
文摘BACKGROUND Blink and masseter reflexes provide reliable,quantifiable data on the function of the central nervous system:Delayed latencies have been found in patients with neurocognitive disorder(ND)and type 2 diabetes mellitus(T2DM),but this has not been studied in patients with both pathologies.AIM To investigate if older adults with ND plus T2DM have prolonged latencies of blink and masseter-reflex and if they were associated with disease progression.METHODS This cross-sectional study included 227 older adults(>60 years)from Colima,Mexico.Neurocognitive disorder was identified by a neuropsychological battery test,and T2DM identified by medical history,fasting glucose,and glycosylated hemoglobin.Latencies in the early reflex(R1),ipsilateral late(R2),and contralateral late(R2c)components of the blink reflex were analyzed for all subjects,and 183 subjects were analyzed for latency of the masseter reflex.RESULTS In 20.7%of participants,ND was detected.In 37%,T2DM was detected.Latencies in R1,R2,and R2c were significantly prolonged for groups with ND plus T2DM,ND,and T2DM,compared with the control group(P<0.0001).The masseter reflex was only prolonged in older adults(regardless of T2DM status)with ND vs controls(P=0.030).In older adults with ND and without T2DM,the more the cognitive impairment progressed,the more prolonged latencies in R2 and R2c presented(P<0.01).CONCLUSION These findings suggest that blink and masseter reflexes could be used to evaluate possible changes in brainstem circuits in older adults with ND and T2DM.
基金funded by a grant from the Faculty of MedicineRamathibodi Hospital,Mahidol University,Bangkok,Thailand
文摘Background Prevalence of neurocognitive disorder with Lewy bodies （NCDLB） is low in Asian populations, which may partially refect its diagnostic diffculty. The Mayo Fluctuations Scale, a short questionnaire that evaluates cognitive fuctuation, has been shown to signifcantly differentiate NCDLB from Alzheimer＇s disease.Aim This study aimed to develop the Mayo Fluctuations Scale-Thai version and assess its validity to screen NCDLB in an elderly population.Methods The Mayo Fluctuations Scale was translated into Thai. The process involved back-translation, cross-cultural adaptation, feld testing of the prefnal version, as well as fnal adjustments. From all patients attending the Psychiatric and Memory Clinic at Ramathibodi Hospital, 135 patients accompanied by their primary caregivers were included. Caregivers were interviewed by research assistants using a four-item scale, and psychiatrists determined patients＇ diagnosis based on the diagnostic and statistical manual of mental disorders （DSM）-5 criteria. Evaluations performed by psychiatrists and research assistants were blinded.Results Seventeen participants had been diagnosed with major NCDLB. At a cut-off score of 2 or over, the Mayo Fluctuations Scale exhibited excellent performance to differentiate major NCDLB from other major neurocognitive disorders （NCDs）, with a sensitivity of 94.1% and a specifcity of 71.4%, and acceptable performance to differentiate mild NCDLB from other mild NCDs, with a sensitivity of 60% and a specifcity of 93.1%.Conclusion The Mayo Fluctuations Scale-Thai version is an excellent screening tool for major NCDLB and an acceptable tool that may be used with other additional tests for mild NCDLB. The tool is practical for use in memory and psychiatric clinics. Further validation studies in participants with other specifc clinical conditions are required.
基金Supported by the National Science and Technology Major Project(2022ZD0118002)the Basic Research Project of the Institute of Software,Chinese Academy of Sciences(ISCAS-JCMS-202306)the Youth Innovation Promotion Association CAS Grant(2023119).
文摘The global trend of population aging poses significant challenges to society and healthcare systems,particularly because of neurocognitive disorders(NCDs)such as Parkinson's disease(PD)and Alzheimer's disease(AD).In this context,artificial intelligence techniques have demonstrated promising potential for the objective assessment and detection of NCDs.Multimodal contactless screening technologies,such as speech-language processing,computer vision,and virtual reality,offer efficient and convenient methods for disease diagnosis and progression tracking.This paper systematically reviews the specific methods and applications of these technologies in the detection of NCDs using data collection paradigms,feature extraction,and modeling approaches.Additionally,the potential applications and future prospects of these technologies for the detection of cognitive and motor disorders are explored.By providing a comprehensive summary and refinement of the extant theories,methodologies,and applications,this study aims to facilitate an in-depth understanding of these technologies for researchers,both within and outside the field.To the best of our knowledge,this is the first survey to cover the use of speech-language processing,computer vision,and virtual reality technologies for the detection of NSDs.
基金supported by the National Natural Science Foundation of China,No.82371444(to YZ)the Natural Science Foundation of Hubei Province,No.2022CFB216(to XC)the Key Research Project of Ministry of Science and Technology of China,No.2022ZD021160(to YZ)。
文摘The hypothalamic-pituitary-adrenal axis regulates the secretion of glucoco rticoids in response to environmental challenges.In the brain,a nuclear receptor transcription fa ctor,the glucocorticoid recepto r,is an important component of the hypothalamicpituitary-a d renal axis's negative feedback loop and plays a key role in regulating cognitive equilibrium and neuroplasticity.The glucoco rticoid receptor influences cognitive processes,including glutamate neurotransmission,calcium signaling,and the activation of brain-derived neurotrophic factor-mediated pathways,through a combination of genomic and non-genomic mechanisms.Protein interactions within the central nervous system can alter the expression and activity of the glucocorticoid receptor,there by affecting the hypothalamic-pituitary-a d renal axis and stress-related cognitive functions.An appropriate level of glucocorticoid receptor expression can improve cognitive function,while excessive glucocorticoid receptors or long-term exposure to glucoco rticoids may lead to cognitive impairment.Patients with cognitive impairment-associated diseases,such as Alzheimer's disease,aging,depression,Parkinson's disease,Huntington's disease,stroke,and addiction,often present with dysregulation of the hypothalamic-pituitary-adrenal axis and glucocorticoid receptor expression.This review provides a comprehensive overview of the functions of the glucoco rticoid receptor in the hypothalamic-pituitary-a d renal axis and cognitive activities.It emphasizes that appropriate glucocorticoid receptor signaling fa cilitates learning and memory,while its dysregulation can lead to cognitive impairment.This provides clues about how glucocorticoid receptor signaling can be targeted to ove rcome cognitive disability-related disorders.
文摘Objective:According to the World Health Organization,the number of infected people with human immunodeficiency virus(HIV)in 2019 was about 38 million.Using combinational antiretroviral therapy in recent years has increased life expectancy in these people and HIV has been changed from a deadly disease to a chronic one.HIV-associated neurological disorders(HAND)include asymptomatic neurological disorders,Motor neurological disorders,and HIV-associated dementia.Methods:We searched 3 databases(PubMed,Science Direct and Scopus databases)from January 2015 to March 2021 for the keywords;HIV associated with a neurocognitive disorder,HAND and combinational antiretroviral therapy to provide careful consideration of various aspects of these disorders,including;risk factors,their diagnostic methods,their epidemiology,and finally the treatment of HAND.Results:In the initial search,we came across 1351 articles.Three authors did the title-abstract screening,and 270 articles were entered into full-text screening from the previous step.Four authors did the full-text screening,and the screening outcome was 21 articles.We categorized the results of our study into sub-categories,including:risk factors,pathogenicity,clinical manifestations,diagnosis,and epidemiology of HAND.Conclusions:Although the HAND subheading has made great strides,many questions about the disease remain unanswered,and many of the diagnosing established methods are not 100%accurate and as a result of that,this epidemy can’t be fully endured yet.We hope to find and apply further advances and more definitive solutions in the coming decades.
基金supported by the National Natural Science Foundation of China, No. 81171134Major State Basic Research Development Program (973 Program), No. 2011CB707500+5 种基金Science and Technology Foundation of Guangzhou, No. 2010Y1-C291Science and Technology Foundation of Guangdong Province, No. 2010B030700017Guangdong Medical Research Funds, No. B2010160Jinan University-National College Students' Innovative Entrepreneurial Training Programs in 2012, No. 1210559039the Key Laboratory's Open Fund of Jinan University, No. 51212003College Students' Extracurricular Scientific Innovation and Entrepreneurial Activity Research Topic of Jinan University Challenge Cup in 2012, No. (2012) 42
文摘Our previous studies have shown that infection with the gp120 V3 loop can cause human immunodeficiency virus-1 associated neurocognitive disorders. Curcumin has been shown to improve these effects to some degree, but the precise mechanisms remain unknown. The present study analyzed the neuroprotective effect and mechanism of curcumin in relation to hippocampal neurons. Results showed that 1 nmol/L gp120 V3 loop suppressed the growth of synapses. After administration of 1 !umol/L curcumin, synaptic growth improved. Curcumin is neuroprotective against gp120 V3 loop-induced neuronal damage by inhibiting the activation of L-type calcium currents, relieving intracellular Ca^2＋ overload, promoting Bcl-2 expression, and inhibiting Bax activation. The effect of curcumin was identical to nimodipine, suggesting that curcumin has the same neuroprotective effects against gp120 V3 loop-induced neuronal damage.
基金supported by the Natural Science Foundation of Zhejiang Province(LZ22H090002,2014C33170)National Natural Science Foundation of China(82171260,81641042,81471240)。
文摘General anesthetic agents can impact brain function through interactions with neurons and their effects on glial cells.Oligodendrocytes perform essential roles in the central nervous system,including myelin sheath formation,axonal metabolism,and neuroplasticity regulation.They are particularly vulnerable to the effects of general anesthetic agents resulting in impaired proliferation,differentiation,and apoptosis.Neurologists are increasingly interested in the effects of general anesthetic agents on oligodendrocytes.These agents not only act on the surface receptors of oligodendrocytes to elicit neuroinflammation through modulation of signaling pathways,but also disrupt metabolic processes and alter the expression of genes involved in oligodendrocyte development and function.In this review,we summarize the effects of general anesthetic agents on oligodendrocytes.We anticipate that future research will continue to explore these effects and develop strategies to decrease the incidence of adverse reactions associated with the use of general anesthetic agents.
基金supported by Grants from the National Natural Science Foundation of China (81571987)
文摘Despite the success of combined antiretroviral therapy in recent years, the prevalence of human immunodeficiency virus(HIV)-associated neurocognitive disorders in people living with HIV-1 is increasing, significantly reducing the healthrelated quality of their lives. Although neurons cannot be infected by HIV-1, shed viral proteins such as transactivator of transcription(Tat) can cause dendritic damage. However, the detailed molecular mechanism of Tat-induced neuronal impairment remains unknown. In this study, we first showed that recombinant Tat(1–72 aa) induced neurotoxicity in primary cultured mouse neurons. Second, exposure to Tat_(1–72) was shown to reduce the length and number of dendrites in cultured neurons. Third, Tat_(1–72)(0–6 h) modulates protein phosphatase 1(PP1) expression and enhances its activity by decreasing the phosphorylation level of PP1 at Thr320. Finally, Tat_(1–72)(24 h) downregulates CREB activity and CREBmediated gene(BDNF, c-fos, Egr-1) expression. Together, these findings suggest that Tat_(1–72) might impair cognitive function by regulating the activity of PP1 and the CREB/BDNF pathway.
文摘Objective: Some studies have investigated the association between oral microbiome and mild cognitive impairment (MCI). However, there needs to be more narrative reviews synthesizing this evidence. This study aimed to bridge this gap in the current knowledge. Methods: A comprehensive search was conducted on PubMed (MEDLINE) to identify studies examining the association between the oral microbiome and MCI. Search parameters and inclusion criteria were clearly defined, encompassing terms related to the oral microbiome, MCI, and their association. Two authors independently selected relevant studies and performed data extraction. Result: Four studies were included. Two cohort studies and two case-control reported an association between the oral microbiome and MCI. Conclusion: Based on the evidence synthesized from the included studies, the review suggests an association between MCI and the oral microbiome. Specifically, all included studies identified significant differences in the abundance of specific microbial species between individuals with MCI and those with normal cognitive function, underscoring the potential role of these species in neuroinflammatory diseases.
文摘A study was made to determine whether HIV-infected patients with prolonged virological control suffer subclinical neurocognitive problems capable of interfering with driving skills, compared with the general population, and to explore the possible existence of differences between those treated with and without efavirenz. Material and Methods: We included 40 patients without history of neoplasm, psychiatric disorders or infections of the central nervous system associated or not to HIV, with stable and effective antiretroviral therapy during at least 48 months. Use was made of the ASDE DRIVER TEST N-845 standardized by the Spanish traffic authorities, and for which data corresponding to the Spanish general population were obtained from the manufacturer of the test battery. The Student t-test was used to compare the different variables with the population standards, and the comparison of proportions Z-statistic was used to determine the proportion of subjects above the accepted limit of normality cutoff point. These analyses were replicated for the two sub-samples (with or without efavirenz therapy), with a 95% confidence level. The SPSS version 15 statistical package and Epidat 3.1 program were used. Results: The scores obtained in the HIV group were significantly poorer in the anticipation speed tests and in one of the multiple reactions test, though better results were obtained in the bimanual visual-motor coordination test. There were no differences in the percentages of patients with scores below the recommended limits. On comparing the treatment subgroups (efavirenz versus protease inhibitor), no differences were recorded in any of the study variables, and the differences with respect to the general population were the same as those described for the global group. Conclusions: Little differences were observed in driving skills in HIV well controlled HIV patients of minor clinical significance, and no differences were found in driving skills between the patients administered Efavirenz and those receiving protease inhibitor treatments.
