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[摘要]
视网膜功能和结构复杂微妙,含有大量的神经元细胞且再生能力极其有限,在缺血、缺氧等病理条件下极易受损凋亡,出现不可逆性的视力丧失。视网膜疾病非常常见,如视网膜色素变性(RP)、年龄相关性黄斑变性(ARMD)、糖尿病视网膜病变(DR)、青光眼等,临床中该类疾病大多是对症治疗,虽有效但在神经保护方面存在一定的局限性。血管内皮生长因子(VEGF)-B在VEGF家族中功能相对惰性,与促血管生成的VEGF-A不同,VEGF-B在血管生成方面表现出功能惰性,但却展现出显著的神经细胞保护作用。VEGF-B是一种有效的抗凋亡、抗氧化因子,可以通过与VEGFR-1结合激活ERK1/2或Akt通路调节凋亡基因的表达和增强谷氨酸脱羧酶1的表达,另外还可以减少谷氨酸表达,从而达到视网膜神经细胞保护作用。文章就VEGF-B对视网膜神经细胞保护作用进行综述,为视网膜相关性疾病的治疗提供新的思路。
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[Abstract]
The retina has a complex and delicate function and structure, containing a large number of neuronal cells with extremely limited regenerative capacity, which are susceptible to damage and apoptosis under pathological conditions such as ischemia and hypoxia, resulting in irreversible vision loss. Retinal diseases are very common, such as retinitis pigmentosa(RP), age-related macular degeneration(ARMD), diabetic retinopathy(DR), and glaucoma. Most of the diseases in this category are treated symptomatically, which is effective but has some limitations in neuroprotection. Vascular endothelial growth factor(VEGF)-B is functionally relatively inert in the VEGF family, and unlike pro-angiogenic VEGF-A, VEGF-B shows functional inertia in angiogenesis but exhibits significant neuroprotective effects. VEGF-B is a potent anti-apoptotic, antioxidant factor that can regulate the expression of apoptotic genes and enhance the expression of glutamic acid decarboxylase 1 by binding to VEGFR-1 to activate the ERK1/2 or Akt pathway, in addition to decreasing the expression of glutamate, resulting in retinal neuroprotective effects. In this article, the protective effects of VEGF-B on retinal neuronal cells were reviewed to provide new ideas for the treatment of retina-associated diseases.
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