肥大细胞与肾纤维化

肥大细胞是多种介质和细胞因子的产生细胞。它直接或间接参与机体的多种生理和病理过程。近年的研究发现 ,肥大细胞与肾纤维化也有较为密切的关系 ,机制尚不完全清楚。本文就这方面的研究进展作一综述     

CD2相关蛋白在肾脏固有细胞中的表达及分布

CD2相关蛋白（CD2AP）是与蛋白尿发生密切相关的足细胞分子。近年研究表明，CD2AP不仅是足细胞足突间裂孔隔膜的重要成分，而且还参与细胞骨架的重构，可能参与细胞许多重要的生理功能。本研究通过观察CD2AP在。肾脏固有细胞中的分布及其在足细胞分化中的分布变化，初步探讨其在足细胞中的生理功能。     

The Effect of Ligustrazine on Peritoneal Transport in Peritoneal dialysis

In order to investigate the effect of ligustrazine (Lig)i.p.on peritoneal permeability in peritoneal dialysis and its side effects,creatinine was given intravenously and continuously to maintain the high plasma creatinine level.All the rabbits were divided into three groups:normal control group (goup A),group B treated with 0.12% Lig and group C treated with 0.24% Lig.The peritoneal dialysis of all rabbits lasted 2h.The plasma and dialysate levels of glucose,protein and creatining were observed immediate,30min,60min,90min,120min after dialysis.Creastinine dialysate/plasma ratio (D/P),protein D/P ratio,grucose D/Do at different time points after dialysis and creatinine mass transfer area coefficient (MTAC) at 120min were calculated.The structures of peritoneum were observed under optical microscope and electron microscope after continuously intraperitoneal injection of Lig for 14 days.The results showed that the 90-min and 12-min creatinine D/P ratios in the group C were higher than in the group A.The 120-min creatinine MATC in the group C was higher than in the group A.The rabbits treated with Lig did not show significant structure changes of peritoneum and signs of peritoneal irritation.It was suggested that Lig could increase mass transfer ability of peritoneum without significant side effects.     

Effects of Simvastatin on Renal Interstitial Fibrosis after Unilateral Ureteral Obstruction in Rats

THE SEVERITY OF TUBULOINTERSTITIAL FI-BROSIS has long been considered a crucial deter-minant in progressive renal injury and in long-termprognosis in both human and experimentalglomerulonephritis.1 Finding a method to impedeinterstitial fibrosis and limit the progression ofchronic renal diseases towards end-stage renaldisease (ESRD) is an emerging focus in this field.Simvastatin is a new 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase inhibitor. Re-cent observations have suggested that HMG-CoAredu...     

测定血清Cystatin C浓度判断肾小球滤过率的临床意义

目的 验证测定血清Cystatin C浓度作为判断肾小球滤过率（GFR）指标的可行性。方法 对40例不同肾功能状态的患者同时进行血清Cystatin C浓度和^99mTc-DTPA清除率的测定，以^99mTc-DTPA清除率为标准方法，对两组结果进行相关分析。结果 血清Cystatin C与^99mTc-DTPA清除率有高度相关性。结论 测定血清Cystatin C浓度是一种敏感，准确，并可快速反映GFR的方法。     

Role of Connective Tissue Growth Factor in Extracellular Matrix Degradation in Renal Tubular Epithelial Cells

In order to investigate the effects of connective tissue growth factor (CTGF) antisense oligodeoxynucleotide (ODN) on plasminogen activator inhibitor-1 (PAI-1) expression in renal tubular cells induced by transforming growth factor β1 (TGF-β1) and to explore the role of CTGF in the degradation of renal extracellular matrix (ECM), a human proximal tubular epithelial cell line (HKC) was cultured in vitro. Cationic lipid-mediated CTGF antisense ODN was transfected into HKC. After HKC were stimulated with TGF-β1 (5 μg/L), the mRNA level of PAI-1 was detected by RT-PCR. In-tracellular PAI-1 protein synthesis was assessed by flow cytometry. The secreted PAI-1 in the media was determined by Western blot. The results showed that TGF-β1 could induce tubular CTGF and PAI-1 mRNA expression. The PAI-1 mRNA expression induced by TGF-β1 was significantly inhib-ited by CTGF antisense ODN. CTGF antisense ODN also inhibited intracellular PAI-1 protein syn-thesis and lowered the levels of PAI-1 protein secreted into the media. It was concluded that CTGF might play a crucial role in the degradation of excessive ECM during tubulointerstitial fibrosis, and blocking the biological effect of CTGF may be a novel way in preventing renal fibrosis.     

高糖通过SGK_1通路促进人肾小球系膜细胞合成结缔组织生长因子

目的研究血清和糖皮质激素诱导的蛋白激酶1(SGK1)在高糖诱导人肾小球系膜细胞(HMC)产生结缔组织生长因子(CTGF)中的作用,探讨SGK1在糖尿病肾病(DN)肾小球硬化中的作用机制。方法HMC分为低糖组(5·5mmol·L-1D-葡萄糖)、高糖组(25mmol·L-1D-葡萄糖)和甘露醇对照组(19·5mmol·L-1甘露醇和5·5mmol·L-1D-葡萄糖),刺激24、72h后,采用RT-PCR方法和West-ernblot方法检测CTGFmRNA及蛋白的表达;将带有SGK1显性激活型突变体质粒(pIRES2-EGFP-S422DhSGK1,SD)和带有SGK1显性失活型突变体质粒(pIRES2-EGFP-K127NhSGK1,KN)分别瞬时转染HMC;同时,设空质粒(PIRES2-EGFP,FP)转染组和未转染组(NT)为对照。分别用低糖(LG,5·5mmol·L-1D-葡萄糖)和高糖(HG,25mmol·L-1D-葡萄糖)刺激24、72h后,采用RT-PCR方法和Western blot方法检测CT-GF的mRNA及蛋白的表达。结果与低糖组和甘露醇组相比较,在高糖刺激下,HMC中CTGF mRNA及蛋白的表达明显上调;低糖环境下,转染SD的HMC与转染FP、NT组比较,其CTGFmRNA和蛋白的表达明显增加。转染KN的HMC与转染FP、NT组比较,其CTGF mRNA和蛋白的表达差异无显著性;高糖环境下转染SD的HMC与转染KN、转染FP、NT组比较,其CTGF mRNA和蛋白的表达明显增加。转染KN的HMC与转染FP、NT组比较,其CTGF mRNA和蛋白的表达明显减少。结论在DN中,高糖能促进HMC的CTGF mRNA及蛋白的表达,并且可以通过SGK1介导的信号通路来诱导人肾小球系膜细胞增加合成CTGF,这种新发现的信号通路,表明SGK1可能通过促进CTGF的合成来参与糖尿病肾病肾小球纤维化的发生。     

慢性肾功能不全补锌治疗20例临床观察

本文对1987年1月～1988年5月在我院住院的20例慢伫肾功能不全患者进行了补锌前后血清锌值弼定及临床观察，探索微量元素锌与慢性肾功能不全之间的联系．以期寻求改善病人临床症状及延长病人生命的有效途径。     

1,25(OH)2D3阻抑UUO大鼠肾间质纤维化的实验研究

肾间质纤维化几乎是所有慢性肾脏疾病进行性发展的共同通路,是导致慢性肾功能衰竭(CRF)的病理学基础,寻求其早期可逆因子或防治措施对肾脏疾病转归有重要意义.     

IPD对慢性肾功衰病人血中β2—M水平的影响

对16例IPD病人血清β_2-M清除量作了观察,并以病人透析前和8例HD病人作对照,结果表明:用含1.5%葡萄糖乳酸盐透析液行IPD,可清除β_2-M2.06±0.27mg/L;IPD病人血清β_2-M较透析前明显升高(P<0.01);HD病人血清β_2-M较IPD病人为高(P<0.05)。