Hypertension and kidney alterations in rat offspring from low protein pregnancies.

Veronica C Villar-Martini, Jorge J Carvalho, Mario F Neves, Marcia B Aguila, Carlos A Mandarim-de-Lacerda
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引用次数: 33

Abstract

Objective: Low birth weight contributes to the early onset of end-stage renal disease. Therefore, this study was undertaken to investigate early and late glomerular structural alterations in both sexes of Wistar rat offspring from dams submitted to severe low protein intake during gestation.

Methods: Offspring from dams fed normal protein (19% of protein) or low protein (5% of protein) were studied at days 0, 10, 90 and 180 of age.

Results: Inner cortical structure showed immature (comma-shaped and S-shaped forms) and mature corpuscles in different proportions in low protein offspring (less maturity) and normal protein offspring (more maturity). At day 10 (end of the nephrogenesis period), immature corpuscles were observed only in low protein offspring. In adulthood, low protein offspring had higher blood pressure, and showed thicker glomerular basement membrane (GBM) with effacement of the pedicles, and slit diaphragm absent with some podocytes directly adhering to the basal membrane with pedicles absent. The number of renal corpuscles was lower in low protein offspring than in normal protein offspring of the same sex, all age groups (P < 0.001). No interaction was observed between sex and maternal nutrition for the same sex and all age groups.

Conclusion: Gestational low protein leads to glomerulogenesis retardation and consequently a lower nephron number with thick GBM and structural alterations in the pedicles of podocytes.

低蛋白妊娠大鼠子代高血压和肾脏改变。
目的:低出生体重有助于终末期肾病的早期发病。因此,本研究旨在研究妊娠期间严重低蛋白摄入的雄性Wistar大鼠后代早期和晚期肾小球结构的变化。方法:分别于0、10、90、180日龄饲喂正常蛋白(占蛋白质的19%)和低蛋白(占蛋白质的5%)的公鸭子代。结果:低蛋白子代(成熟度较低)和正常蛋白子代(成熟度较高)的内皮层结构呈现不同比例的未成熟小体(逗号形和s形)和成熟小体。在第10天(肾形成期结束),仅在低蛋白后代中观察到未成熟的小体。成年期低蛋白子代血压升高,肾小球基底膜增厚,蒂消失,裂隙隔膜缺失,部分足细胞直接附着在基膜上,蒂缺失。各年龄组低蛋白子代肾小体数量均低于正常蛋白子代(P < 0.001)。没有观察到性别与同性别和所有年龄组的母亲营养之间的相互作用。结论:妊娠期低蛋白可导致肾小球发育迟缓,导致肾小球数量减少,肾小球瘤变厚,足细胞蒂结构改变。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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