3 讨论
Beyer-Mears等[9]指出,用一种醛糖还原酶抑制剂,Zopolrestat处理STZ-糖尿病性大鼠6个月,抑制了白内障发生,减少了蛋白尿。随后,Follansbee等[10]报道,用一种新的高血糖和高血脂的抑制剂,Pyrazinoylguanidine处理STZ糖尿病大鼠,4个月内完全抑制了白内障发生。其机理可能通过抑制高血糖所致。近年,Sulochana等[11]报道,赖氨酸和必需氨基酸抑制STZ-糖性白内障是由于清除高血糖保护晶体免受糖基化所致。Malone等[5]曾认为糖性白内障和老年性白内障发生的共同点不是渗透压改变,最终途径伴有晶状体牛磺酸下降。本文结果支持了后两种观点,我们推测牛磺酸抑制STZ-糖尿病性白内障发生,不仅与其早期阻断高血糖形成有关,而且可能通过牛磺酸处理补偿了糖尿病性白内障晶状体中亏缺的牛磺酸,保护了晶状体上皮细胞免于氧化损伤而避免了细胞凋亡。但是当增加STZ浓度至70mg/Kg体重,牛磺酸可否抑制其白内障形成,尚在继续研究。
1,Trachtman H,Futterweit S,Bienkowski RS.Taurine prevents glucose-induced lipid peroxidation and increased collagen production in cultured rat mesangial cells.Biochem Biophys Res Commun,1993,191∶759
2,Nakamori K,Koyama I,Nakamura T,et al.Effectiveness of taurine in protecting biomembrane against oxidant.Chen Pharm Bulls,1990,38∶3116
3,张伟,陈翠真.牛磺酸对亚硒酸纳性白内障抑制作用的实验研究.中华眼科杂志,1998,34∶208
4,陈凤华,陈翠真.牛磺酸对晶状体上皮细胞bcl-2基因表达的影响.眼科研究,1998,16∶243
5,Malone JI,Lowitt S,Cook WR,et al.Nonosmotic diabetic cataracts.Pediatr Res,1990,27∶293
6,Rakienten N,Rakienten Ml,Nadkarni MV.Studies on the diabetogenic action of streptozotoin (Nse-379177).Cancer Chemother Rep,1963,29∶91
7,A-Rahim YI,Beyer KH Jr,Vesell ES.Studies on pyrazinoylguanidine 1.Characterization of metabolic effects in diabetic rats.Pharmacology,1996,52∶135
8,Kador PF,Inoue J,Secchi EF,et al.Effect of sorbitol dehydroginase inhibition on sugar cataract formation in galactose-fed and diabetic rats.Exp Eye Res,1998,67∶203
9,Beyer-Mears A,Mistry K,Dicckc FPJ,et al.Zopolrestat prevention of proteinuria,albuminuria and cataractogenesis in diabetes mellitus.Pharmacology,1996,52∶292
10,Follansbee MH,Beyer KH Jr,Vesell ES.Studies on pyreainoyl-guonidine 6.Prevention of cataracts in STZ-diabetic rats.Pharmacology,1997,54∶256
11,Sulochana KN,Punitham R,Ramakrishnan S.Beneficial effect of lysine and amino acids on cataractogenesis in experimental diabetes through possible antiglycation of lens proteins.Exp Eye Res,1998,67∶597 上一页 [1] [2] [3] |