目的观察正常大鼠在高脂饮食诱导下形成肥胖后,胰岛素敏感性及其TNFα、FFAs的变化。方法 9周龄健康雄性Wistar大鼠16只,随机分为正常饲养组(NC,n=8)和高脂饲养组(HF,n=8)。喂养10周,比较两组大鼠体重、HOMA-IR、以及TNFα、FFAs等的变...目的观察正常大鼠在高脂饮食诱导下形成肥胖后,胰岛素敏感性及其TNFα、FFAs的变化。方法 9周龄健康雄性Wistar大鼠16只,随机分为正常饲养组(NC,n=8)和高脂饲养组(HF,n=8)。喂养10周,比较两组大鼠体重、HOMA-IR、以及TNFα、FFAs等的变化。结果经10周高脂喂养,HF组与NC组比较,体重和内脏脂肪组织显著增加并出现胰岛素抵抗,空腹FFAs和TNFα水平显著上升,较NC组分别增加了80.8%(P<0.05)和58.4%(P<0.05),但两组空腹血糖差异无显著性(HF组:7.89±1.46mmol/L vs NC组8.70±1.59mmol/L,P>0.05)。结论高脂饮食可诱导大鼠肥胖伴胰岛素抵抗,其胰岛素抵抗的形成可能与FFAs水平的升高有关。展开更多
Cation ion-exchange resin particles （CERP）/polyethersulfone （PES） hybrid catalytic membranes were prepared by immerse phase inversion for the esterification of different free fatty acids （FFAs） （such as, dodeca...Cation ion-exchange resin particles （CERP）/polyethersulfone （PES） hybrid catalytic membranes were prepared by immerse phase inversion for the esterification of different free fatty acids （FFAs） （such as, dodecanoic acid, tetradecanoic acid, hexadecanoic acid and octadecadienoic acid） with methanol. The membranes were characterized by SEM, ion-exchange capacity and swelling degree test. It is found that dodecanoic acid has the highest FFAs conversion among the four acids for its stronger acidic and reactivity. Different effects of membrane annealing temperature, reaction temperature, molar ratio of methanol to FFAs and catalytic membrane loading on the esterification were investigated by the esterification of dodecanoic acid with methanol. The dodecanoic acid conversion reaches 97.5% trader the optimal condition when the esterification reaction lasted for 8 h.展开更多
AMD:年龄相关性黄斑变性(age-related macular degeneration)ANOVA:方差分析(analysis of variance)BUT:泪膜破裂时间(breakup time of tear film)DR:糖尿病视网膜病变(diabetic retinopathy)EAU:实验性自身免疫性葡萄膜炎(experimental...AMD:年龄相关性黄斑变性(age-related macular degeneration)ANOVA:方差分析(analysis of variance)BUT:泪膜破裂时间(breakup time of tear film)DR:糖尿病视网膜病变(diabetic retinopathy)EAU:实验性自身免疫性葡萄膜炎(experimental autoimmune uveitis)EGF:表皮生长因子(epidermal growth factor)ELISA:酶联免疫吸附测定(enzyme-linked immunosorbent assay)ERG:视网膜电图(electroretinogram)FFA:荧光素眼底血管造影(fundus fluorescein angiography).展开更多
血脂代谢异常和肾脏异位脂质沉积与肾脏病的发生和发展密切相关,特别是在糖尿病肾病中更为明显。临床上常用的治疗高胆固醇血症的药物,如他汀类、依泽麦布和前蛋白转化酶枯草溶菌素9(proprotein convertase subtilisin/Kexin type 9,PCS...血脂代谢异常和肾脏异位脂质沉积与肾脏病的发生和发展密切相关,特别是在糖尿病肾病中更为明显。临床上常用的治疗高胆固醇血症的药物,如他汀类、依泽麦布和前蛋白转化酶枯草溶菌素9(proprotein convertase subtilisin/Kexin type 9,PCSK9)抑制剂,虽都能有效降低血脂水平,但均不能延缓肾脏病进展。近年来,越来越多的研究开始关注游离脂肪酸(free fat acids,FFA)对肾脏的影响。慢性肾脏病(chronic kidney disease,CKD)患者存在明显的脂肪酸代谢紊乱,这种异常参与肾脏病进展,FFA的转运蛋白在肾脏疾病中的作用机制逐渐被认识。本文就近端肾小管上皮细胞表达的脂肪酸转运蛋白2(fatty acid transport protein 2,FATP2)的临床前研究做一综述。展开更多
Central retinal artery occlusion(CRAO)is an acute ophthalmic emergency,characterized by sudden vision loss due to retinal ischemia in areas corresponding to arterial occlusion sites.Diagnosis primarily relies on fundu...Central retinal artery occlusion(CRAO)is an acute ophthalmic emergency,characterized by sudden vision loss due to retinal ischemia in areas corresponding to arterial occlusion sites.Diagnosis primarily relies on fundus fluorescein angiography(FFA)and optical coherence tomography(OCT),which show delayed retinal artery filling time hours to days after occlusion and increased hyperreflectivity of the inner retina.展开更多
The distinction and precise identification of tumor nodules are crucial for timely lung cancer diagnosis andplanning intervention. This research work addresses the major issues pertaining to the field of medical image...The distinction and precise identification of tumor nodules are crucial for timely lung cancer diagnosis andplanning intervention. This research work addresses the major issues pertaining to the field of medical imageprocessing while focusing on lung cancer Computed Tomography (CT) images. In this context, the paper proposesan improved lung cancer segmentation technique based on the strengths of nature-inspired approaches. Thebetter resolution of CT is exploited to distinguish healthy subjects from those who have lung cancer. In thisprocess, the visual challenges of the K-means are addressed with the integration of four nature-inspired swarmintelligent techniques. The techniques experimented in this paper are K-means with Artificial Bee Colony (ABC),K-means with Cuckoo Search Algorithm (CSA), K-means with Particle Swarm Optimization (PSO), and Kmeanswith Firefly Algorithm (FFA). The testing and evaluation are performed on Early Lung Cancer ActionProgram (ELCAP) database. The simulation analysis is performed using lung cancer images set against metrics:precision, sensitivity, specificity, f-measure, accuracy,Matthews Correlation Coefficient (MCC), Jaccard, and Dice.The detailed evaluation shows that the K-means with Cuckoo Search Algorithm (CSA) significantly improved thequality of lung cancer segmentation in comparison to the other optimization approaches utilized for lung cancerimages. The results exhibit that the proposed approach (K-means with CSA) achieves precision, sensitivity, and Fmeasureof 0.942, 0.964, and 0.953, respectively, and an average accuracy of 93%. The experimental results prove thatK-meanswithABC,K-meanswith PSO,K-meanswith FFA, andK-meanswithCSAhave achieved an improvementof 10.8%, 13.38%, 13.93%, and 15.7%, respectively, for accuracy measure in comparison to K-means segmentationfor lung cancer images. Further, it is highlighted that the proposed K-means with CSA have achieved a significantimprovement in accuracy, hence can be utilized by researchers for improved segmentation processes of medicalimage datasets for identifying the targeted region of interest.展开更多
Aims:This study describes vascular abnormalities in X-linked retinoschisis(XLRS)using fundus fluorescein angiography(FFA)and ultra-widefield swept-source optical coherence tomography angiography(UWF SS-OCTA)to better ...Aims:This study describes vascular abnormalities in X-linked retinoschisis(XLRS)using fundus fluorescein angiography(FFA)and ultra-widefield swept-source optical coherence tomography angiography(UWF SS-OCTA)to better understand the disease's vascular features and impact.Methods:A retrospective cross-sectional study was conducted on 26 XLRS patients(46 eyes).A comprehensive ophthalmic examination was performed,including FFA and UWF SS-OCTA.FFA abnormalities were divided into peripheral schisis-associated and optic disc-associated types.Results:The mean age of patients was 11.3±6.5 years.Macular schisis appeared in 97.8%of eyes,peripheral schisis in 89.1%,and peripheral bullous schisis(PBS)in 67.39%.Major vascular changes identified by FFA included dendritic capillary dilation/leakage(91.3%),internal residual vessel leakage(78.3%),and capillary dropout/ischemia(71.7%).Minor changes included zonal retinal pigment epithelium(RPE)proliferation(6.5%),bridging vessels(4.4%),and capillary sheathing(4.4%).peripapillary choroidal neovascularization(PPCNV)was noted in 10.9%and situs inversus of optic disc in 13.0%of eyes.Additionally,situs in versus of optic disc and zonal RPE proliferation were novel findings.Major FFA changes correlated with broader PBS(P=0.045)(P<0.001)(P=0.003).Clock hours of PBS were significant predictors for internal residual vessel leakage(OR=0.30,P=0.03).No significant correlation was found between gene mutation type and FFA abnormalities(P=0.539).Conclusions:This study highlighted the significant prevalence(95.7%)of vascular abnormalities in XLRS and emphasized the importance of combining FFA with UWF SS-OCTA for comprehensive evaluation,enhancing the understanding of XLRS pathophysiology and aiding in targeted treatment approaches.展开更多
文摘目的观察正常大鼠在高脂饮食诱导下形成肥胖后,胰岛素敏感性及其TNFα、FFAs的变化。方法 9周龄健康雄性Wistar大鼠16只,随机分为正常饲养组(NC,n=8)和高脂饲养组(HF,n=8)。喂养10周,比较两组大鼠体重、HOMA-IR、以及TNFα、FFAs等的变化。结果经10周高脂喂养,HF组与NC组比较,体重和内脏脂肪组织显著增加并出现胰岛素抵抗,空腹FFAs和TNFα水平显著上升,较NC组分别增加了80.8%(P<0.05)和58.4%(P<0.05),但两组空腹血糖差异无显著性(HF组:7.89±1.46mmol/L vs NC组8.70±1.59mmol/L,P>0.05)。结论高脂饮食可诱导大鼠肥胖伴胰岛素抵抗,其胰岛素抵抗的形成可能与FFAs水平的升高有关。
基金Project(ZR2011BL005) supported by the Natural Science Foundation of Shandong Province,China
文摘Cation ion-exchange resin particles （CERP）/polyethersulfone （PES） hybrid catalytic membranes were prepared by immerse phase inversion for the esterification of different free fatty acids （FFAs） （such as, dodecanoic acid, tetradecanoic acid, hexadecanoic acid and octadecadienoic acid） with methanol. The membranes were characterized by SEM, ion-exchange capacity and swelling degree test. It is found that dodecanoic acid has the highest FFAs conversion among the four acids for its stronger acidic and reactivity. Different effects of membrane annealing temperature, reaction temperature, molar ratio of methanol to FFAs and catalytic membrane loading on the esterification were investigated by the esterification of dodecanoic acid with methanol. The dodecanoic acid conversion reaches 97.5% trader the optimal condition when the esterification reaction lasted for 8 h.
文摘血脂代谢异常和肾脏异位脂质沉积与肾脏病的发生和发展密切相关,特别是在糖尿病肾病中更为明显。临床上常用的治疗高胆固醇血症的药物,如他汀类、依泽麦布和前蛋白转化酶枯草溶菌素9(proprotein convertase subtilisin/Kexin type 9,PCSK9)抑制剂,虽都能有效降低血脂水平,但均不能延缓肾脏病进展。近年来,越来越多的研究开始关注游离脂肪酸(free fat acids,FFA)对肾脏的影响。慢性肾脏病(chronic kidney disease,CKD)患者存在明显的脂肪酸代谢紊乱,这种异常参与肾脏病进展,FFA的转运蛋白在肾脏疾病中的作用机制逐渐被认识。本文就近端肾小管上皮细胞表达的脂肪酸转运蛋白2(fatty acid transport protein 2,FATP2)的临床前研究做一综述。
基金Supported by National Natural Science Foundation of China(No.82070991).
文摘Central retinal artery occlusion(CRAO)is an acute ophthalmic emergency,characterized by sudden vision loss due to retinal ischemia in areas corresponding to arterial occlusion sites.Diagnosis primarily relies on fundus fluorescein angiography(FFA)and optical coherence tomography(OCT),which show delayed retinal artery filling time hours to days after occlusion and increased hyperreflectivity of the inner retina.
基金the Researchers Supporting Project(RSP2023R395),King Saud University,Riyadh,Saudi Arabia.
文摘The distinction and precise identification of tumor nodules are crucial for timely lung cancer diagnosis andplanning intervention. This research work addresses the major issues pertaining to the field of medical imageprocessing while focusing on lung cancer Computed Tomography (CT) images. In this context, the paper proposesan improved lung cancer segmentation technique based on the strengths of nature-inspired approaches. Thebetter resolution of CT is exploited to distinguish healthy subjects from those who have lung cancer. In thisprocess, the visual challenges of the K-means are addressed with the integration of four nature-inspired swarmintelligent techniques. The techniques experimented in this paper are K-means with Artificial Bee Colony (ABC),K-means with Cuckoo Search Algorithm (CSA), K-means with Particle Swarm Optimization (PSO), and Kmeanswith Firefly Algorithm (FFA). The testing and evaluation are performed on Early Lung Cancer ActionProgram (ELCAP) database. The simulation analysis is performed using lung cancer images set against metrics:precision, sensitivity, specificity, f-measure, accuracy,Matthews Correlation Coefficient (MCC), Jaccard, and Dice.The detailed evaluation shows that the K-means with Cuckoo Search Algorithm (CSA) significantly improved thequality of lung cancer segmentation in comparison to the other optimization approaches utilized for lung cancerimages. The results exhibit that the proposed approach (K-means with CSA) achieves precision, sensitivity, and Fmeasureof 0.942, 0.964, and 0.953, respectively, and an average accuracy of 93%. The experimental results prove thatK-meanswithABC,K-meanswith PSO,K-meanswith FFA, andK-meanswithCSAhave achieved an improvementof 10.8%, 13.38%, 13.93%, and 15.7%, respectively, for accuracy measure in comparison to K-means segmentationfor lung cancer images. Further, it is highlighted that the proposed K-means with CSA have achieved a significantimprovement in accuracy, hence can be utilized by researchers for improved segmentation processes of medicalimage datasets for identifying the targeted region of interest.
基金supported by the Construction Project of High-Level Hospitals in Guangdong Province(303020107,303010303058)the National Natural Science Foundation of China(82271092,82401282)+1 种基金Guangdong Basic and Applied Research Foundation(2023A1515010430)Guangzhou Municipal Science and Technology Key Project(2024A03J0171).
文摘Aims:This study describes vascular abnormalities in X-linked retinoschisis(XLRS)using fundus fluorescein angiography(FFA)and ultra-widefield swept-source optical coherence tomography angiography(UWF SS-OCTA)to better understand the disease's vascular features and impact.Methods:A retrospective cross-sectional study was conducted on 26 XLRS patients(46 eyes).A comprehensive ophthalmic examination was performed,including FFA and UWF SS-OCTA.FFA abnormalities were divided into peripheral schisis-associated and optic disc-associated types.Results:The mean age of patients was 11.3±6.5 years.Macular schisis appeared in 97.8%of eyes,peripheral schisis in 89.1%,and peripheral bullous schisis(PBS)in 67.39%.Major vascular changes identified by FFA included dendritic capillary dilation/leakage(91.3%),internal residual vessel leakage(78.3%),and capillary dropout/ischemia(71.7%).Minor changes included zonal retinal pigment epithelium(RPE)proliferation(6.5%),bridging vessels(4.4%),and capillary sheathing(4.4%).peripapillary choroidal neovascularization(PPCNV)was noted in 10.9%and situs inversus of optic disc in 13.0%of eyes.Additionally,situs in versus of optic disc and zonal RPE proliferation were novel findings.Major FFA changes correlated with broader PBS(P=0.045)(P<0.001)(P=0.003).Clock hours of PBS were significant predictors for internal residual vessel leakage(OR=0.30,P=0.03).No significant correlation was found between gene mutation type and FFA abnormalities(P=0.539).Conclusions:This study highlighted the significant prevalence(95.7%)of vascular abnormalities in XLRS and emphasized the importance of combining FFA with UWF SS-OCTA for comprehensive evaluation,enhancing the understanding of XLRS pathophysiology and aiding in targeted treatment approaches.
