血浆miR-20a和miR-20b对Ⅱ型糖尿病肾病的诊断价值

目的:探讨血浆miR-20a和miR-20b对Ⅱ型糖尿病肾病(diabetic nephropathy,DN)的诊断价值。方法:选取2017年01月~2019年06月在我院就诊的327名Ⅱ型糖尿病(typeⅡdiabetes mellitus,T2DM)患者,根据Mogenson分期标准,327例T2DM患者中,213例被分到T2DM组,114例被分为Ⅱ型DN组。同时选取同时期在我院体检中心参加体检的健康人120例作为正常对照组(normal control,NC)。应用定量实时聚合酶链反应(quantitative real-time polymerase chain reaction,qRT-PCR)法测定miR-20a和miR-20b的相对表达量。采用Pearson相关分析比较miRNA和临床指标的相关性。采用受试者工作特征(receiver operating characteristic,ROC)曲线分析miR-20a和miR-20b对Ⅱ型DN的诊断价值。采用Logistic回归分析影响Ⅱ型DN的因素。结果:miR-20a和miR-20b在DN患者中的表达量显著高于T2DM组和NC组患者(P均<0.05)。Pearson相关分析显示,miR-20a和miR-20b均与UAER呈正相关,与e GFR呈负相关(P均<0.05)。ROC分析显示miR-20a和miR-20b诊断Ⅱ型DN的ROC曲线下面积(areas under the ROC curve,AUC)分别为0.823和0.870。多因素Logistic回归分析显示较高水平的BMI、TG、TC、FPG、Hb A1C以及miR-20a和miR-20b高表达均是Ⅱ型DN的独立危险因素(P <0.05)。结论:血浆miR-20a和miR-20b在Ⅱ型DN中高表达,是诊断Ⅱ型DN潜在的生物标志物。     

Silicone elastomer gel impregnated with 20(S)-protopanaxadiol-loaded nanostructured lipid carriers for ordered diabetic ulcer recovery

Inefficient diabetic ulcer healing and scar formation remain a challenge worldwide,owing to a series of disordered and dynamic biological events that occur during the process of healing.A functional wound dressing that is capable of promoting ordered diabetic wound recovery is eagerly anticipated.In this study,we designed a silicone elastomer with embedded 20(S)-protopanaxadiol-loaded nanostructured lipid carriers(PPD-NS)to achieve ordered recovery in scarless diabetic ulcer healing.The nanostructured lipid carriers were prepared through an emulsion evaporation-solidification method and then incorporated into a network of silicone elastomer to form a unique nanostructured lipid carrier-enriched gel formulation.Interestingly,the PPD-NS showed excellent in vitro anti-inflammatory and proangiogenic activity.Moreover,in diabetic mice with full-thickness skin excision wound,treatment with PPD-NS significantly promoted in vivo scarless wound healing through suppressing inflammatory infiltration in the inflammatory phase,promoting angiogenesis during the proliferation phase,and regulating collagen deposition in the remodeling phase.Hence,this study demonstrates that the developed PPD-NS could facilitate ordered diabetic wound recovery via multifunctional improvement during different wound-healing phases.This novel approach could be promising for scarless diabetic wound healing.     

锌指蛋白A20在过敏性哮喘中的研究进展

锌指蛋白A20(也称TNFAIP3)是一种可在多种炎症条件,如LPS、IL-1、TNF-α等刺激下,被激活的具有去泛素化和泛素化双重功能的胞质蛋白。目前,A20被认为是NF-κB的负调控因子,具有免疫调节作用。最新研究表明,A20参与了过敏性哮喘的发生和发展。因此,该文对A20的起源、结构、生物学功能及其在过敏性哮喘中的作用进行综述,以期为过敏性哮喘的治疗和预防提供新的方法和思路。     

老年白内障患者晶状体中20s Proteasome的表达

目的探讨老年性白内障患者晶状体中20s Proteasome表达及酶活性的变化及其与白内障发病的关系。方法分别应用Western印迹法及荧光标记蛋白质底物法检测老年性白内障患者晶状体中20s Proteasome的表达及酶活性变化。结果随着晶状体混浊程度及核硬度的增加,20s Proteasome的表达及酶活性均呈下降趋势。结论在老年性白内障发病过程中,20s Proteasome与晶状体混浊程度相关。