AIM:To identify different metabolites,proteins and related pathways to elucidate the causes of proliferative diabetic retinopathy(PDR)and resistance to anti-vascular endothelial growth factor(VEGF)drugs,and to provide...AIM:To identify different metabolites,proteins and related pathways to elucidate the causes of proliferative diabetic retinopathy(PDR)and resistance to anti-vascular endothelial growth factor(VEGF)drugs,and to provide biomarkers for the diagnosis and treatment of PDR.METHODS:Vitreous specimens from patients with diabetic retinopathy were collected and analyzed by Liquid Chromatography-Mass Spectrometry(LC-MS/MS)analyses based on 4D label-free technology.Statistically differentially expressed proteins(DEPs),Gene Ontology(GO),Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway representation and protein interactions were analyzed.RESULTS:A total of 12 samples were analyzed.The proteomics results showed that a total of 58 proteins were identified as DEPs,of which 47 proteins were up-regulated and 11 proteins were down-regulated.We found that C1q and tumor necrosis factor related protein 5(C1QTNF5),Clusterin(CLU),tissue inhibitor of metal protease 1(TIMP1)and signal regulatory protein alpha(SIRPα)can all be specifically regulated after aflibercept treatment.GO functional analysis showed that some DEPs are related to changes in inflammatory regulatory pathways caused by PDR.In addition,protein-protein interaction(PPI)network evaluation revealed that TIMP1 plays a central role in neural regulation.In addition,CD47/SIRPαmay become a key target to resolve anti-VEGF drug resistance in PDR.CONCLUSION:Proteomic analysis is an approach of choice to explore the molecular mechanisms of PDR.Our data show that multiple proteins are differentially changed in PDR patients after intravitreal injection of aflibercept,among which C1QTNF5,CLU,TIMP1 and SIRPαmay become targets for future treatment of PDR and resolution of anti-VEGF resistance.展开更多
目的探究巨噬细胞表面特异分子跨膜4域亚家族A成员6D(membrane-spanning 4-domains subfamily A member 6D,Ms4a6d)基因敲除对雌性小鼠生育力的影响。方法构建Ms4a6d基因敲除小鼠,以各周龄纯合Ms4a6d基因敲除(Ms4a6d^(-/-))小鼠为实验组...目的探究巨噬细胞表面特异分子跨膜4域亚家族A成员6D(membrane-spanning 4-domains subfamily A member 6D,Ms4a6d)基因敲除对雌性小鼠生育力的影响。方法构建Ms4a6d基因敲除小鼠,以各周龄纯合Ms4a6d基因敲除(Ms4a6d^(-/-))小鼠为实验组;采用qPCR、琼脂糖凝胶法鉴定小鼠基因型;运用HE染色、免疫荧光、ELISA等方法检测血清抗缪勒管激素(anti-müllerian hormone,AMH)和雌性Ms4a6d^(-/-)小鼠卵巢中巨噬细胞数量及各级卵泡构成变化;通过生育力实验比较成年Ms4a6d^(-/-)雌鼠妊娠率及平均产仔数变化。结果与同周龄野生型(Ms4a6d+/+)雌鼠比较,2周龄和4周龄的Ms4a6d^(-/-)雌鼠卵巢组织中巨噬细胞显著减少(P<0.01);8周龄时2组卵巢巨噬细胞差异无统计学意义;8周龄Ms4a6d^(-/-)雌鼠卵巢系数显著降低(P<0.01);8周龄时卵巢组织中原始卵泡、初级卵泡、次级卵泡和窦卵泡数量显著减少(P<0.05),各年龄段Ms4a6d^(-/-)雌鼠血清中AMH显著降低(P<0.05)。成年Ms4a6d^(-/-)雌鼠的平均妊娠率为56%,每胎产仔数为(4.1±1.1)只,均显著低于同龄野生型雌鼠的妊娠率(89%)和每胎产仔数[(6.3±1.2)只]。结论Ms4a6d基因敲除导致青春期前雌鼠卵巢组织中巨噬细胞数量减少,抑制其生长卵泡发育,最终表现为成年雌鼠卵巢储备减少,生育力降低。展开更多
文摘虚拟仿真实训和传统教学方法在4D盆底超声这项高阶医学技术教学培训中应用的情况。方法 采用问卷调查以两种教学方法随机分组进行4D盆底超声技术学习的体验感,调查对象为昆明医科大学影像医学及超声医学研二、研三学生,采用完全随机设计的t检验进行分析评价。结果 ① 本次调查两组学生中,虚拟仿真实训组的学生重复检查吻合率较带教实操组的学生高,2组之间存在统计学差异;②而对于课后自主学习情况,虚拟仿真实训组的学生较带教实操组的学生进行的也更好,2组之间存在统计学差异。结论 虚拟仿真实训对于高阶4D盆底超声医学技术的学习较传统的带教实操学习更有帮助;作为创新的教学方法可以研究推广,以帮助医学生提升学习效率,缩短学习时间,以达到事半功倍的学习效果。
基金Supported by Tianjin Key Medical Discipline Specialty Construction Project(No.TJYXZDXK-016A)Henan Provincial Department of Science and Technology(No.LHGJ20200802).
文摘AIM:To identify different metabolites,proteins and related pathways to elucidate the causes of proliferative diabetic retinopathy(PDR)and resistance to anti-vascular endothelial growth factor(VEGF)drugs,and to provide biomarkers for the diagnosis and treatment of PDR.METHODS:Vitreous specimens from patients with diabetic retinopathy were collected and analyzed by Liquid Chromatography-Mass Spectrometry(LC-MS/MS)analyses based on 4D label-free technology.Statistically differentially expressed proteins(DEPs),Gene Ontology(GO),Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway representation and protein interactions were analyzed.RESULTS:A total of 12 samples were analyzed.The proteomics results showed that a total of 58 proteins were identified as DEPs,of which 47 proteins were up-regulated and 11 proteins were down-regulated.We found that C1q and tumor necrosis factor related protein 5(C1QTNF5),Clusterin(CLU),tissue inhibitor of metal protease 1(TIMP1)and signal regulatory protein alpha(SIRPα)can all be specifically regulated after aflibercept treatment.GO functional analysis showed that some DEPs are related to changes in inflammatory regulatory pathways caused by PDR.In addition,protein-protein interaction(PPI)network evaluation revealed that TIMP1 plays a central role in neural regulation.In addition,CD47/SIRPαmay become a key target to resolve anti-VEGF drug resistance in PDR.CONCLUSION:Proteomic analysis is an approach of choice to explore the molecular mechanisms of PDR.Our data show that multiple proteins are differentially changed in PDR patients after intravitreal injection of aflibercept,among which C1QTNF5,CLU,TIMP1 and SIRPαmay become targets for future treatment of PDR and resolution of anti-VEGF resistance.
文摘目的探究巨噬细胞表面特异分子跨膜4域亚家族A成员6D(membrane-spanning 4-domains subfamily A member 6D,Ms4a6d)基因敲除对雌性小鼠生育力的影响。方法构建Ms4a6d基因敲除小鼠,以各周龄纯合Ms4a6d基因敲除(Ms4a6d^(-/-))小鼠为实验组;采用qPCR、琼脂糖凝胶法鉴定小鼠基因型;运用HE染色、免疫荧光、ELISA等方法检测血清抗缪勒管激素(anti-müllerian hormone,AMH)和雌性Ms4a6d^(-/-)小鼠卵巢中巨噬细胞数量及各级卵泡构成变化;通过生育力实验比较成年Ms4a6d^(-/-)雌鼠妊娠率及平均产仔数变化。结果与同周龄野生型(Ms4a6d+/+)雌鼠比较,2周龄和4周龄的Ms4a6d^(-/-)雌鼠卵巢组织中巨噬细胞显著减少(P<0.01);8周龄时2组卵巢巨噬细胞差异无统计学意义;8周龄Ms4a6d^(-/-)雌鼠卵巢系数显著降低(P<0.01);8周龄时卵巢组织中原始卵泡、初级卵泡、次级卵泡和窦卵泡数量显著减少(P<0.05),各年龄段Ms4a6d^(-/-)雌鼠血清中AMH显著降低(P<0.05)。成年Ms4a6d^(-/-)雌鼠的平均妊娠率为56%,每胎产仔数为(4.1±1.1)只,均显著低于同龄野生型雌鼠的妊娠率(89%)和每胎产仔数[(6.3±1.2)只]。结论Ms4a6d基因敲除导致青春期前雌鼠卵巢组织中巨噬细胞数量减少,抑制其生长卵泡发育,最终表现为成年雌鼠卵巢储备减少,生育力降低。
