珠子草对大鼠半乳糖性白内障的抑制作用

目的:本研究旨在评价珠子草在体外及体内抑制半乳糖性白内障的作用。方法:研究珠子草提取液在体内及体外抑制半乳糖性白内障的作用。300g/L半乳糖饮食诱导半乳糖性白内障大鼠,75, 150及300mg/kg3剂量水平口服珠子草。在体外小鼠晶体培养基中掺入半乳糖(30mmol/L)建立渗透性应激,研究珠子草(720及880μg/mL)对谷胱甘肽(GSH)及山梨糖醇水平的影响。结果:在体内,珠子草显著延缓的白内障的发生和发展。除了延缓各期白内障的发展,直至试验周期结束,低剂量组未发展至IV期。在体外,880μg/mL珠子草培养晶状体显示较高浓度的GSH和山梨糖醇浓度的降低。在体内,与对照组比较,75mg/kg珠子草显著延缓了白内障的发生和发展。结论:在试验模型中珠子草延缓了白内障的发展。然而,将其延伸运用在人类预防白内障需要进一步的研究。

Anti cataract potential of phyllanthus niruri in galactose induced cataractogenesis of rat

AIM: To evaluate anti cataract effect of phyllanthus niruri (PN) both in vitro and in vivo galactose induced cataract.METHODS: Aqueous extract of PN was evaluated against galactose-induced cataract both in vitro and in vivo. Galactosaemic cataract was induced in rats by feeding 300g/L galactose diet. PN was administered orally at three-dose levels 75, 150 and 300 mg/kg of body weight. Rat lenses were subjected to osmotic stress in vitro by incorporating galactose (30mmol/L) in the culture medium. The effect of PN (720 and 880μg/mL) on the glutathione (GSH) and polyols levels was studied.RESULTS: PN significantly delayed the onset and progression of cataract in vivo. In addition to the delay in reaching various stages of development of cataract, stage IV did not develop with lower doses till the completion of experimental period. Lenses treated with PN 880μg/mL concentration showed higher levels of GSH and decreased levels of polyols in vitro. In vivo, 75mg/kg significantly delayed the onset and progression of cataract as compared to control.CONCLUSION: PN delayed the process of cataracto-genesis in the experimental models. However, further study is required to extrapolate the use in human beings for the prevention of cataract.