增生性玻璃体视网膜病变(PVR)是眼外伤、孔源性视网膜脱离(RRD)等的并发症,也是造成RRD复位手术失败的常见原因。视网膜色素上皮(RPE)细胞异常增生、迁移和上皮间充质化在PVR相关的视网膜前增生膜的形成中起着主导作用。雷帕霉素是哺乳动物雷帕霉素靶蛋白(mTOR)的特异性抑制剂,选择性地结合细胞蛋白FKBP-12,和FKBP-雷帕霉素相关蛋白(FRAP)的FKBP12-雷帕霉素结构域(FRB)直接结合变构从而抑制mTOR活性。雷帕霉素具有多种衍生物和类似物,通过对mTOR信号转导途径的抑制发挥抑制细胞增生和调节细胞周期等作用,在PVR中对RPE细胞异常增生、迁移和上皮间充质化起到一定的抑制作用,对PVR中胶质细胞的修复、炎症细胞的抑制和血管内皮细胞的损伤也起到一定保护作用。近年来,雷帕霉素在多种眼病中的临床试验不断开展,对其在眼部给药方式的探索和用药安全性方面的证据逐渐全面。本文就雷帕霉素对PVR中RPE细胞及其他细胞的保护作用、用药安全性等方面作一综述。
Proliferative vitreoretinopathy (PVR) is a complication of ocular trauma, rhegmatogenous retinal detachment (RRD), and also a common cause of RRD repair surgery failure.Abnormal proliferation, migration and epithelial mesenchymal transition (EMT) of retinal pigment epithelium (RPE) cells play a leading role in the formation of PVR epiretinal membrane.Rapamycin is the specific inhibitor of mammalian target of rapamycin (mTOR). It selectively binds to the cell protein FKBP-12 and directly binds to the FKBP12-rapamycin domain (FRB) of FKBP rapamycin associated protein (FRAP) to inhibit mTOR activity.Rapamycin has a variety of rapalog (rapamycin analog), which inhibits cell proliferation and regulate cell cycle by inhibiting mTOR signal transduction pathway.It also plays a certain role in inhibiting RPE cell abnormal proliferation, migration and EMT in PVR, and protecting the repair of glial cells, inhibiting the inflammatory cells and preventing the vascular endothelial cell damage.In recent years, the clinical trials and drug studies have shown the important role of rapamycin in ocular diseases.In addition, the evidence on ocular administrations and drug safety of rapamycin has been gradually accumulated.This article reviewed the protective effects and safety of rapamycin on RPE cells and other cells in PVR.
廖梦宇,颜华. 雷帕霉素对增生性玻璃体视网膜病变的保护作用研究进展[J]. 中华实验眼科杂志,2023,41(01):88-91.
DOI:10.3760/cma.j.cn115989-20200203-00048版权归中华医学会所有。
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