高浓度葡萄糖诱导大鼠腹膜间皮细胞上皮-间叶转化

目的探讨高浓度葡萄糖对大鼠腹膜间皮细胞上皮-间叶转化(EMT)的影响,建立大鼠腹膜间皮细胞EMT模型。方法体外培养的大鼠腹膜间皮细胞经含60、120 mmol/L葡萄糖的M199培养基分别培养48、72 h;以正常M199培养基和含120 mmol/L甘露醇的M199培养基为对照。采用相差显微镜观察细胞形态学改变,应用实时定量PCR法检测间皮细胞E-cad-herin、α-SMA、Collagen I mRNA的表达;应用Western印迹法检测E-cadherin、α-SMA蛋白的表达。结果高浓度葡萄糖(60、120 mmol/L)刺激后,大鼠腹膜间皮细胞由典型的上皮细胞形态逐渐变为梭形及不规则形,类似肌成纤维细胞;大鼠腹膜间皮细胞α-SMA、Collagen I mRNA和α-SMA蛋白表达水平显著增加(P0.05);大鼠腹膜间皮细胞E-cadherin mRNA和E-cad-herin蛋白表达水平显著下降(P0.05)。结论高浓度葡萄糖能上调α-SMA、Collagen I表达和下调E-cadherin表达,高浓度葡萄糖诱导大鼠腹膜间皮细胞EMT。     

血清白蛋白水平对腹膜透析患者残余肾功能的影响

Objective To study the effect of serum albumin(Alb) levels on residual renal function (RRF) in peritoneal dialysis patients. Methods Fiftyfour patients accepting peritoneal dialysis were divided into two groups base- d on the serum levels of Alb,including group A (Alb≥35 g/L) and group B(Alb < 35g/L). The serum levels of Alb, creatinine, urea nitrogen, IL-6, TNFα were determined. 24 - hour urine and peritoneal dialysis fluids were remained and urea nitrogen, creatinine, RRF, and others were determined. The above mentioned marks and RRF were observed in follow- up visit. Results The proportion of diabetic nephropathy patients in group B was higher than in group A. Correlative analysis indicated that a negative correlation was found between the levels of Alb and mediators of inflammation IL - 6 and TNF - α. The de-crease in RRF is time- dependent in all selected patients. But the RRF in group B began to decline since peritoneal dialysis 6th month, there is lower compared with 1st month. After peritoneal dialysis 12th months the RRF in group A also significant declined, but the degree of declining in group B was greater. Correlative analysis indicated that the negative correlation was found between RRF and the levels of Alb, otherwise the positive correhtion was found between the RRF and mediators of inflammation IL - 6 and TNF - α. Conclusions The low levels of Alia resulted from malnutrition was one of the factors to decline RRF in per-itoneal dialysis patients. The high levels of mediators of inflammation accelerated the deterioration of the RRF.     

高浓度葡萄糖诱导大鼠腹膜间皮细胞上皮-间叶转化

目的探讨高浓度葡萄糖对大鼠腹膜间皮细胞上皮-间叶转化（EMT）的影响,建立大鼠腹膜间皮细胞EMT模型。方法体外培养的大鼠腹膜间皮细胞经含60、120 mmol/L葡萄糖的M199培养基分别培养48、72 h;以正常M199培养基和含120 mmol/L甘露醇的M199培养基为对照。采用相差显微镜观察细胞形态学改变,应用实时定量PCR法检测间皮细胞E-cad-herin、α-SMA、Collagen I mRNA的表达;应用Western印迹法检测E-cadherin、α-SMA蛋白的表达。结果高浓度葡萄糖（60、120 mmol/L）刺激后,大鼠腹膜间皮细胞由典型的上皮细胞形态逐渐变为梭形及不规则形,类似肌成纤维细胞;大鼠腹膜间皮细胞α-SMA、Collagen I mRNA和α-SMA蛋白表达水平显著增加（P〈0.05）;大鼠腹膜间皮细胞E-cadherin mRNA和E-cad-herin蛋白表达水平显著下降（P〈0.05）。结论高浓度葡萄糖能上调α-SMA、Collagen I表达和下调E-cadherin表达,高浓度葡萄糖诱导大鼠腹膜间皮细胞EMT。