首页> 外文期刊>American Journal of Physiology >Temporary effects of circulating Amadori products on glomerular filtration properties in the normal mouse.
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Temporary effects of circulating Amadori products on glomerular filtration properties in the normal mouse.

机译:循环的Amadori产品对正常小鼠肾小球滤过特性的暂时影响。

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Previous studies have established a preferential glomerular filtration of glycated BSA (gBSA), as well as a facilitated filtration of BSA in the presence of gBSA. We intend to determine whether these modifications are permanent or transitory. gBSA was intravenously injected into anesthetized normal mice and maintained in circulation for 30 min, 1, 2, 24, and 48 h. Five minutes before death, FITC-BSA was injected. On immunocytochemical evaluations, increased glomerular filtration of FITC-BSA was found at all circulating time points. Changes at 24 and 48 h were less pronounced. Glomerular basement membrane (GBM)-to-lumen gBSA labeling ratios were similar at all time points suggesting no accumulation of gBSA in the GBM. Seventy percent of the gBSA was cleared from the circulation and the GBM after 24 h, and 95% after 48 h. This was confirmed in experiments with radiolabeled tracers. These results suggest that the alteration in GBM permeability to BSA in the normal mouse are due to the presence of gBSA andare gradually overcome along with its clearance from circulation. In early diabetes, increasing concentrations of circulating glycated proteins could be responsible for changes in glomerular permselectivity and probably for the alteration in glomerular filtration properties leading to diabetic nephropathy.
机译:先前的研究已经建立了糖化BSA(gBSA)的优先肾小球滤过,以及在gBSA存在下促进BSA的滤过。我们打算确定这些修改是永久的还是暂时的。将gBSA静脉注射到麻醉的正常小鼠中,并保持循环30分钟,1、2、24和48小时。死亡前五分钟,注射FITC-BSA。在免疫细胞化学评估中,在所有循环时间点都发现FITC-BSA的肾小球滤过增加。 24和48 h的变化不太明显。肾小球基底膜(GBM)与管腔gBSA的标记率在所有时间点都相似,这表明GBM中没有gBSA的积累。 24小时后从循环系统和GBM中清除了70%的gBSA,48小时后清除了95%的gBSA。在放射性标记示踪剂的实验中证实了这一点。这些结果表明,正常小鼠中GBM对BSA的通透性改变是由于gBSA的存在,随着其从循环中清除而逐渐被克服。在早期糖尿病中,循环糖基化蛋白浓度的升高可能是肾小球通透性变化的原因,并且可能是导致糖尿病性肾病的肾小球滤过特性改变的原因。

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