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| 1 | 枸杞子-丹参药对治疗视网膜色素变性的分子机制探讨显示文摘目的:基于网络药理学和生物信息学方法探讨枸杞子-丹参(LFSMR)药对治疗视网膜色素变性(RP)的分子机制。方法:通过中药系统药理学数据库和分析平台(TCMSP)筛选和预测LFSMR药对可能的入血活性成分和作用靶点;通过疾病基因数据库挖掘视网膜色素变性相关的基因靶点;采用功能蛋白联合网络数据库(STRING)绘制成分-靶点和疾病-靶点的蛋白质-蛋白质交互作用(PPI)网络,并取这两个网络的交集;运用注释、可视化和整合发现数据库(DAVID)对交集网络进行基因本体和京都基因与基因组百科全书(KEGG)通路分析;采用cyto Hubba分析筛选关键靶点。结果:在TCMSP数据库共检索出与LFSMR相关的活性成分390个,根据药代动力学参数筛得活性成分110个,进一步筛选获得19个入血活性成分,并检索出与这些成分相关的靶点208个;从疾病基因数据库获得与RP直接相关的基因206个;成分靶点和疾病靶点PPI网络取交集后得到79个基因;这些基因主要涉及蛋白自体磷酸化、转录调节、细胞增殖等生物学过程,分子功能主要涉及三磷酸腺苷结合、转录因子活性、核心启动子结合等,富集于核质、转录因子复合物、细胞核、细胞质等区域,主要与神经营养素信号通路,细胞周期相关通路,Wnt信号通路有关;进一步分析筛选得到LFSMR治疗RP的8个关键性基因靶点。结论:LFSMR药效作用的物质基础为多孔甾醇、丹参酮ⅡA等19个入血活性成分,其治疗RP的关键靶点包括E2F转录因子1(E2F1),视网膜母细胞瘤基因1(RB1)等8个基因,主要作用机制与调控神经营养素信号通路、细胞周期相关通路等信号网络有关。 | 宋厚盼 曾梅艳 彭俊 陈小娟 陈新怡 何卫波 杨毅敬 蔡雄 彭清华 | 2019 | 中国实验方剂学杂志2019，25，14： | 14 |
| 2 | Myelinosome organelles in pathological retinas: ubiquitous presence and dual role in ocular proteostasis maintenance显示文摘The timely and efficient elimination of aberrant proteins and damaged organelles, formed in response to various genetic and environmental stressors, is a vital need for all cells of the body. Recent lines of evidence point out several non-classical strategies employed by ocular tissues to cope with aberrant constituents generated in the retina and in the retinal pigmented epithelium cells exposed to various stressors. Along with conventional strategies relying upon the intracellular degradation of aberrant constituents through ubiquitin-proteasome and/or lysosome-dependent autophagy proteolysis, two non-conventional mechanisms also contribute to proteostasis maintenance in ocular tissues. An exosome-mediated clearing and a myelinosome-driven secretion mechanism do not require intracellular degradation but provide the export of aberrant constituents and “waste proteins” outside of the cells. The current review is centered on the non-degradative myelinosome-driven secretion mechanism, which operates in the retina of transgenic Huntington’s disease R6/1 model mice. Myelinosome-driven secretion is supported by rare organelles myelinosomes that are detected not only in degenerative Huntington’s disease R6/1 retina but also in various pathological states of the retina and of the retinal pigmented epithelium. The intra-retinal traffic and inter-cellular exchange of myelinosomes was discussed in the context of a dual role of the myelinosome-driven secretion mechanism for proteostasis maintenance in different ocular compartments. Special focus was made on the interplay between degradative and non-degradative strategies in ocular pathophysiology, to delineate potential therapeutic approaches to counteract several vision diseases. | Marina G.Yefimova | 2023 | Neural Regeneration Research2023，18，5： | 0 |
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