AIM:To investigate the molecular mechanisms underlying the influence of hypoxia and alpha-ketoglutaric acid(α-KG)on scleral collagen expression.METHODS:Meta-analysis and clinical statistics were used to prove the cha...AIM:To investigate the molecular mechanisms underlying the influence of hypoxia and alpha-ketoglutaric acid(α-KG)on scleral collagen expression.METHODS:Meta-analysis and clinical statistics were used to prove the changes in choroidal thickness(ChT)during myopia.The establishment of a hypoxic myopia model(HYP)for rabbit scleral fibroblasts through hypoxic culture and the effects of hypoxia andα-KG on collagen expression were demonstrated by Sirius red staining.Transcriptome analysis was used to verify the genes and pathways that hypoxia andα-KG affect collagen expression.Finally,real-time quantitative reverse transcription polymerase chain reaction(RT-qPCR)was used for reverse verification.RESULTS:Meta-analysis results aligned with clinical statistics,revealing a thinning of ChT,leading to scleral hypoxia.Sirius red staining indicated lower collagen expression in the HYP group and higher collagen expression in the HYP+α-KG group,showed that hypoxia reduced collagen expression in scleral fibroblasts,whileα-KG can elevated collagen expression under HYP conditions.Transcriptome analysis unveiled the related genes and signaling pathways of hypoxia andα-KG affect scleral collagen expression and the results were verified by RT-qPCR.CONCLUSION:The potential molecular mechanisms through which hypoxia andα-KG influencing myopia is unraveled and three novel genes TLCD4,TBC1D4,and EPHX3 are identified.These findings provide a new perspective on the prevention and treatment of myopia via regulating collagen expression.展开更多
●AIM:To determine the common causes and visual outcome after treatment among uveitis and scleritis patients.●METHODS:This is a retrospective cohort observational study.All consecutive clinical records of patients wi...●AIM:To determine the common causes and visual outcome after treatment among uveitis and scleritis patients.●METHODS:This is a retrospective cohort observational study.All consecutive clinical records of patients with newly diagnosed uveitis and scleritis over a 4-year period,from Jan.1,2017 to Dec.31,2020,were analysed.Data was collected at the presentation and included a follow-up period of one year.●RESULTS:A total of 288 patients were recruited during the study period.Anterior uveitis was the most common anatomical diagnosis(50.0%)followed by panuveitis(25.0%),scleritis(13.5%),posterior uveitis(6.9%),and intermediate uveitis(4.5%).Viral Herpes was the most common cause of infectious cases,while Vogt-Koyanagi-Harada(VKH)disease and human leucocyte antigen(HLA)B27 spondyloarthropathy were the leading causes of identifiable non-infectious cases.Majority of patients presented with unilateral,non-granulomatous uveitis with an absence of hypopyon.Anatomical locations like posterior uveitis and panuveitis,and visual acuity worse than 3/60 at presentation were the factors associated with poor visual outcomes(P<0.05).About 60%of patients had an identifiable cause for the uveitis and scleritis,with nearly equal distribution of infectious(n=85,29.5%)and noninfectious causes(n=84,29.2%).About 14.5%of patients were clinically blind at 1y of follow-up.The most common complication in our uveitis patients was glaucoma(47.5%),followed by cystoid macula oedema(18.9%)and cataract(13.9%).●CONCLUSION:Uveitis and scleritis are important causes of ocular morbidity.They are potentially blinding diseases which can have a good outcome if diagnosed and treated early.展开更多
BACKGROUND We described a case of a patient with a meningioma in the posterior fossa presenting atypically with an isolated unilateral vocal cord palsy causing severe respiratory distress.This is of interest as the pa...BACKGROUND We described a case of a patient with a meningioma in the posterior fossa presenting atypically with an isolated unilateral vocal cord palsy causing severe respiratory distress.This is of interest as the patient had no other symptomatology,especially given the size of the mass,which would typically cause a pressure effect leading to neurological and auditory symptoms.CASE SUMMARY This case report described a 48-year-old male who was married with two children and employed as a car guard.He had a medical history of asthma for the past 10 years controlled with an as-needed beta 2 agonist metered dose inhaler.He initially presented to our facility with severe respiratory distress.He reported a 1-wk history of shortness of breath and wheezing that was not relieved by his bronchodilator.He had no constitutional symptoms or impairment of hearing.On clinical examination,the patient’s chest was“silent.”Our initial assessment was status asthmaticus with type 2 respiratory failure,based on the history of asthma,a“silent chest,”and the arterial blood gas results.CONCLUSION A posterior fossa meningioma of such a large size and with extensive infiltration rarely presents with an isolated unilateral vocal cord palsy.The patient’s chief presenting feature was severe respiratory distress,which combined with his background medical history of asthma,was misleading.Clinicians should thus consider meningioma as a differential diagnosis for a unilateral vocal cord palsy even without audiology involvement.展开更多
目的观察慢病毒载体转染豚鼠巩膜成纤维细胞的有效性及对细胞活性的影响。方法转染组用慢病毒携带绿色荧光蛋白(lentiviral mediated green fluorescent protein,Lenti-GFP)转染豚鼠巩膜成纤维细胞,对照组加入空白培养液,转染组按最佳...目的观察慢病毒载体转染豚鼠巩膜成纤维细胞的有效性及对细胞活性的影响。方法转染组用慢病毒携带绿色荧光蛋白(lentiviral mediated green fluorescent protein,Lenti-GFP)转染豚鼠巩膜成纤维细胞,对照组加入空白培养液,转染组按最佳感染复数(multiplicity of infection,MOI)为50、100、200、400加入Lenti-GFP,转染2d、3d、4d、5d、6d和7d后,在倒置显微镜下观察绿色荧光蛋白表达情况,流式细胞仪检测转染效率,MTT法检测病毒对细胞增殖的影响。结果 Lenti-GFP转染细胞后48h可以看见绿色荧光;在同一MOI值下,随时间延长转染效率增高,第5天达到高峰;在MOI为400,转染5d时转染效率达82.86%;转染5d行MTT检测显示:MOI为50～400时,同一转染时间各组IOD值与对照组比较,差异均无统计学意义(均为P>0.05)。结论慢病毒载体可以在体外稳定而有效地转染豚鼠巩膜成纤维细胞,且不影响细胞活性,是巩膜成纤维细胞理想的基因转染载体。展开更多
基金Supported by the Natural Science Foundation of Shandong Province,China(No.ZR2023MA069)the Medical and Health Technology Development Project of Shandong Province,China(No.202202050602)+1 种基金College Students’Innovation and Entrepreneurship Training Program(No.S202410438017)the Graduate Student Research Grant from Shandong Second Medical University.
文摘AIM:To investigate the molecular mechanisms underlying the influence of hypoxia and alpha-ketoglutaric acid(α-KG)on scleral collagen expression.METHODS:Meta-analysis and clinical statistics were used to prove the changes in choroidal thickness(ChT)during myopia.The establishment of a hypoxic myopia model(HYP)for rabbit scleral fibroblasts through hypoxic culture and the effects of hypoxia andα-KG on collagen expression were demonstrated by Sirius red staining.Transcriptome analysis was used to verify the genes and pathways that hypoxia andα-KG affect collagen expression.Finally,real-time quantitative reverse transcription polymerase chain reaction(RT-qPCR)was used for reverse verification.RESULTS:Meta-analysis results aligned with clinical statistics,revealing a thinning of ChT,leading to scleral hypoxia.Sirius red staining indicated lower collagen expression in the HYP group and higher collagen expression in the HYP+α-KG group,showed that hypoxia reduced collagen expression in scleral fibroblasts,whileα-KG can elevated collagen expression under HYP conditions.Transcriptome analysis unveiled the related genes and signaling pathways of hypoxia andα-KG affect scleral collagen expression and the results were verified by RT-qPCR.CONCLUSION:The potential molecular mechanisms through which hypoxia andα-KG influencing myopia is unraveled and three novel genes TLCD4,TBC1D4,and EPHX3 are identified.These findings provide a new perspective on the prevention and treatment of myopia via regulating collagen expression.
文摘●AIM:To determine the common causes and visual outcome after treatment among uveitis and scleritis patients.●METHODS:This is a retrospective cohort observational study.All consecutive clinical records of patients with newly diagnosed uveitis and scleritis over a 4-year period,from Jan.1,2017 to Dec.31,2020,were analysed.Data was collected at the presentation and included a follow-up period of one year.●RESULTS:A total of 288 patients were recruited during the study period.Anterior uveitis was the most common anatomical diagnosis(50.0%)followed by panuveitis(25.0%),scleritis(13.5%),posterior uveitis(6.9%),and intermediate uveitis(4.5%).Viral Herpes was the most common cause of infectious cases,while Vogt-Koyanagi-Harada(VKH)disease and human leucocyte antigen(HLA)B27 spondyloarthropathy were the leading causes of identifiable non-infectious cases.Majority of patients presented with unilateral,non-granulomatous uveitis with an absence of hypopyon.Anatomical locations like posterior uveitis and panuveitis,and visual acuity worse than 3/60 at presentation were the factors associated with poor visual outcomes(P<0.05).About 60%of patients had an identifiable cause for the uveitis and scleritis,with nearly equal distribution of infectious(n=85,29.5%)and noninfectious causes(n=84,29.2%).About 14.5%of patients were clinically blind at 1y of follow-up.The most common complication in our uveitis patients was glaucoma(47.5%),followed by cystoid macula oedema(18.9%)and cataract(13.9%).●CONCLUSION:Uveitis and scleritis are important causes of ocular morbidity.They are potentially blinding diseases which can have a good outcome if diagnosed and treated early.
文摘BACKGROUND We described a case of a patient with a meningioma in the posterior fossa presenting atypically with an isolated unilateral vocal cord palsy causing severe respiratory distress.This is of interest as the patient had no other symptomatology,especially given the size of the mass,which would typically cause a pressure effect leading to neurological and auditory symptoms.CASE SUMMARY This case report described a 48-year-old male who was married with two children and employed as a car guard.He had a medical history of asthma for the past 10 years controlled with an as-needed beta 2 agonist metered dose inhaler.He initially presented to our facility with severe respiratory distress.He reported a 1-wk history of shortness of breath and wheezing that was not relieved by his bronchodilator.He had no constitutional symptoms or impairment of hearing.On clinical examination,the patient’s chest was“silent.”Our initial assessment was status asthmaticus with type 2 respiratory failure,based on the history of asthma,a“silent chest,”and the arterial blood gas results.CONCLUSION A posterior fossa meningioma of such a large size and with extensive infiltration rarely presents with an isolated unilateral vocal cord palsy.The patient’s chief presenting feature was severe respiratory distress,which combined with his background medical history of asthma,was misleading.Clinicians should thus consider meningioma as a differential diagnosis for a unilateral vocal cord palsy even without audiology involvement.
文摘目的观察慢病毒载体转染豚鼠巩膜成纤维细胞的有效性及对细胞活性的影响。方法转染组用慢病毒携带绿色荧光蛋白(lentiviral mediated green fluorescent protein,Lenti-GFP)转染豚鼠巩膜成纤维细胞,对照组加入空白培养液,转染组按最佳感染复数(multiplicity of infection,MOI)为50、100、200、400加入Lenti-GFP,转染2d、3d、4d、5d、6d和7d后,在倒置显微镜下观察绿色荧光蛋白表达情况,流式细胞仪检测转染效率,MTT法检测病毒对细胞增殖的影响。结果 Lenti-GFP转染细胞后48h可以看见绿色荧光;在同一MOI值下,随时间延长转染效率增高,第5天达到高峰;在MOI为400,转染5d时转染效率达82.86%;转染5d行MTT检测显示:MOI为50～400时,同一转染时间各组IOD值与对照组比较,差异均无统计学意义(均为P>0.05)。结论慢病毒载体可以在体外稳定而有效地转染豚鼠巩膜成纤维细胞,且不影响细胞活性,是巩膜成纤维细胞理想的基因转染载体。
