969;Co MSIA:q2=0.765,r2=0.938)。3D-QSAR模型三维等值图揭示了一些结构特性与抑制活性的关系,为该类药物结构改造提供了有效信息,可减少设计合成工作量,提高新药研发成功的可能性。
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The striatum is the main input structure of the basal ganglia and is involved in voluntary motor control,habit learning and reward processing.Medium spiny neurons(MSNs)comprise80%and 95%of striatal neurons in primates and rodents,respectively,while the remaining

population is made up of
肝脏疾病正逐渐成为全球棘手的医疗问题。肝细胞是肝脏生理活动的主要承担者,在肝脏疾病的研究以及药物的研发和测试方面有着举足轻重的作用。然而,体外分离培养的原代肝细胞面临在体外不能无限增殖和稳定表达肝脏特异基因等问题。有强大的自我更新能力和三胚层分化潜能的诱导性多能肝细胞(i PSCs)能被诱导因子、外源基因和小分子化合物等定向诱导分化为功能性肝细胞。同时,还避免了伦理、宗教以及免疫排斥等诸多问题。本文简要综述了从不同策略诱导i HDAC抑制剂 PSCs成为功能性肝细胞的研究方法和成果,并对该领域进行小结和展望。
关节软骨位于骨骼末端,主要起承重、减震和润滑关节的作用。由于缺乏血运,关节软骨损伤后难以自行修复。关节软骨损伤为临床常见疾病,目前尚无理想的方法促进其修复和再生,而以种子细胞、支架材料和细胞生长因子为基础的组织工程技术为关节软骨修复开辟了新道路。诱导多能干细胞(i selleck化学药品 PSC)作为软骨组织工程全新的种子细胞,与其他种子细胞相比,在软骨细胞移植及体外软骨组织和器官再造方面具有更广阔的应用前景。随着对i PSC的重编程机制、诱导方法、定向软骨分化条件以及临床应用安全性等研究的不断深入,其应用于临床的脚步将越来越近。
Epithelial-mesenchymal transition(EMT),mesenchymal-epithelial transition(MET),and even the sequential EMT-MET can be observed during multiple cell fate conversions including cancer progression and embryonic development.In the current review,we first focused on the existence and beneficial roles of the sequential EMT-MET during three typical cell fate conversions,differentiation from pluripotent stem cells(PSCs)to neurons,de-differentiation

from mouse embryonic fibroblasts(MEFs)to PSCs,and trans-differentiation from MEFs to neurons.We tried to provide some preliminary hypotheses to connect EMT-MET and cell fate conversions,like the possible contributions of the intermediate mesenchymal state to iPSCs generation and neurontrans-differentiation.The intermediate mesenchymal state during sequential EMT-MET was further discussed by exploring the conserved signatures on gene expression during a variety of EMT.Discussion on the interaction among vitamin C,DNA methylation,and EMT/MET was also provided.
目的:研究从人皮肤真皮组织中分离培养的成纤维样细胞向中胚层细胞分化的潜能,初步探讨其替代自体骨髓间充质干细胞(BMSCs)用于组织损伤和缺损修复的可行性。方法:将一定大小的成人腹部全层皮肤组织分别用分散酶和Ⅰ型胶原酶消化,分离获得真皮来源总细胞。单层培养扩增的细胞在含有一定浓度N2、B27、碱性成纤维细胞生长因子(bFGF)和表皮细胞生长因子(EGF)的无血清培养液中进行悬浮培养,并收集培养液中悬浮存在的球状细胞聚集体(SDDSs),用含胎牛血清的培养液进一步单层扩增细胞。以免疫细胞荧光法分析细胞和鉴定细胞的分化特性。结果:真皮中分离的一些单个细胞在无血清培养液中分裂增殖形成SDDSs;在含血清的单层培养条件下,从SDDSs分离培养的细胞增殖活跃,细胞表达间充质干细胞标志物CD90、CD105和波形蛋白;分别向骨细胞、软骨细胞以及脂肪细胞诱导分化后,呈现类似于BMSCs分化特点,分化的细胞呈茜素红、番红O和油红O特殊染色阳性反应,但真皮细胞分化形成的软骨细胞番红O染色弱于骨髓干细胞来源的软骨细胞。结论:结合无血清培养和有血清培养法,可从人真皮组织中分离培养具有向软骨细胞、骨细胞和脂肪细胞分化潜能的细胞,此细胞将有望替代BMSCs用于临床组织损伤修复的再生治疗。
Objective:

此网站 Parkinson’s disease(PD), which is one of the most common neuro‐degenerative disorders, is characterized by the loss of dopamine(DA) neurons in the substantia nigra in the midbrain. Experimental and clinical studies have shown that fetal neural stem cells(NSCs) have therapeutic effects in neurological disorders. The aim of this study was to examine whether cells that were differentiated from NSCs had therapeutic effects in a rat model of PD.