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丝胶对糖尿病大鼠视网膜微血管的保护作用及其作用机制 被引量:6
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作者 于宏飞 董志军 +1 位作者 张铁民 杨帆 《中华实验眼科杂志》 CAS CSCD 北大核心 2017年第1期32-37,共6页
背景糖尿病视网膜病变(DR)是一种慢性炎症性疾病,并伴有微血管病变。研究证实丝胶具有抗炎和抗氧化功能,但其是否对DR早期的微血管结构和功能有保护作用目前仍不十分清楚。目的观察丝胶对糖尿病大鼠视网膜中细胞间黏附分子-1(ICAM-... 背景糖尿病视网膜病变(DR)是一种慢性炎症性疾病,并伴有微血管病变。研究证实丝胶具有抗炎和抗氧化功能,但其是否对DR早期的微血管结构和功能有保护作用目前仍不十分清楚。目的观察丝胶对糖尿病大鼠视网膜中细胞间黏附分子-1(ICAM-1)、血管细胞黏附分子-1(VCAM-1)、Cx43表达的影响,探讨其对糖尿病大鼠视网膜微血管病变的防护作用。方法将48只SPF级健康雄性SD大鼠按计算机数字随机分配法分为正常对照组、糖尿病模型组、丝胶治疗组和羟苯磺酸钙阳性对照组,每组12只。糖尿病模型组、丝胶治疗组、羟苯磺酸钙阳性对照组大鼠均采用链脲佐菌素(STZ)连续腹腔内注射3d并给予高脂饲料饮食法制备糖尿病大鼠模型,成模后分别用生理盐水、2.4g/(kg·d)丝胶溶液和0.2s/(kg·d)羟苯磺酸钙灌胃3个月。采用过量麻醉法处死大鼠并制备视网膜标本,采用苏木精-伊红染色法观察各组大鼠视网膜组织的形态学变化。分别采用Western blot法和逆转录PCR技术检测大鼠视网膜中ICAM-1、VCAM-1和Cx43蛋白及其mRNA的相对表达量,并对各组检测结果进行比较。结果正常对照组大鼠视网膜组织结构正常,糖尿病模型组视网膜可见内界膜肿胀或断裂,偶见突出于内界膜的毛细血管内皮细胞,视网膜神经节细胞(RGCs)数量减少,丝胶治疗组和羟苯磺酸钙阳性对照组大鼠视网膜内界膜轻度增厚,内外核层细胞排列稍欠规则。糖尿病模型组、丝胶治疗组和羟苯磺酸钙组阳性对照大鼠视网膜中ICAM-1和VCAM-1蛋白相对表达量较正常对照组大鼠均明显升高,而Cx43相对表达量均明显下降,差异均有统计学意义(均P〈0.05)。与糖尿病模型组比较,丝胶治疗组大鼠视网膜中ICAM-1和VCAM-1蛋白相对表达量均明显降低(0.8343±0.0321与0.9189±0.0424、0.7264±0.0112与1.2350±0.0789),而Cx43相对表达量明显升高(0.1331±0.0153与0.0392+0.0020),差异均有统计学意义(均P〈0.05)。与正常对照组比较,糖尿病组大鼠视网膜中ICAM-1mRNA和VCAM-1mRNA相对表达量明显升高,而Cx43mRNA表达明显下降,差异均有统计学意义(均P〈0.05);与糖尿病模型组大鼠比较,丝胶治疗组大鼠视网膜中ICAM-1mRNA和VCAM-1mRNA相对表达量明显下降(0.7163±0.0086与0.9568±O.0125;0.3937±0.0350与0.4779±0.0206),而Cx43mRNA表达明显升高(0.6768±0.0648与0.4308±0,1113),差异均有统计学意义(均P〈0.05),各组ICAM-1mRNA、VCAM-1mRNA和Cx43mRNA相对表达量的变化趋势与其蛋白表达相同。结论丝胶能够减轻糖尿病大鼠早期视网膜的微血管病变,从而对DR的发生和发展发挥防护作用,其机制可能是下调视网膜中ICAM-1和VCAM-1的表达以及上调Cx43的表达。 展开更多
关键词 丝胶/药物 抗炎剂/药物 糖尿病视网膜病变/生理病理 基因表达 细胞间黏附分子-1 血管细胞黏附分子-1 缝隙连接蛋白43 视网膜血管/生理病理 SD大鼠
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Antioxidant therapy for chronic hepatitis C after failure of interferon:Results of phase Ⅱ randomized,double-blind placebo controlled clinical trial 被引量:2
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作者 Ezra Gabbay Ehud Zigmond +5 位作者 Orit Pappo Nila Hemed Mina Rowe George Zabrecky Robert Cohen Yaron Ilan 《World Journal of Gastroenterology》 SCIE CAS CSCD 2007年第40期5317-5323,共7页
AIM: TO assess the safety and efficacy of antioxidant therapy for patients with chronic hepatitis C virus (HCV) infection.METHODS: One hundred chronic HCV infection patients failed in interferon treatment were enr... AIM: TO assess the safety and efficacy of antioxidant therapy for patients with chronic hepatitis C virus (HCV) infection.METHODS: One hundred chronic HCV infection patients failed in interferon treatment were enrolled and randomly assigned to receive combined intravenous and oral antioxidants or placebo, or oral treatment alone, Primary end points were liver enzymes, HCV-RNA levels and histology.RESULTS: Combined oral and intravenous antioxidant therapy was associated with a significant decline in ALT levels in 52% of patients who received antioxidant therapy vs 20% of patients who received placebo (P = 0.05). Histology activity index (HAI) score at the end of treatment was reduced in 48% of patients who received antioxidant therapy vs 26% of patients who received placebo (P = 0.21). HCV-RNA levels decreased by l-log or more in 28% of patients who received antioxidant therapy vs 12% who received placebo (P = NS). In part 11 of the trial, oral administration of antioxidants was not associated with significant alterations in any of the end points.CONCLUSION: Antioxidant therapy has a mild beneficial effect on the inflammatory response of chronic HCV infection patients who are non-responders to interferon. Combined antiviral and antioxidant therapy may be beneficial for these patients. 展开更多
关键词 Hepatitis C virus Antioxidant therapy Histology activity index GLYCYRRHIZA L-g utathione
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Exacerbation of inflammatory bowel disease by nonsteroidal anti-inflammatory drugs and cyclooxygenase-2 inhibitors:Fact or fiction? 被引量:1
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作者 Mario Guslandi 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第10期1509-1510,共2页
The existence of a possible link between inflammatory bowel disease (IBD) and nonsteroidal anti-inflammatory drugs (NSAIDs) has been repeatedly suggested. Recently, a few studies have addressed the issue of a poss... The existence of a possible link between inflammatory bowel disease (IBD) and nonsteroidal anti-inflammatory drugs (NSAIDs) has been repeatedly suggested. Recently, a few studies have addressed the issue of a possible, similar effect by selective cyclooxygenase-2 inhibitors (COXIBs). The present article reviews the available scientific evidence for this controversial subject. 展开更多
关键词 COX-2 inhibitor Inflammatory bowel disease Non-steroidal anti-inflammatory drugs
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