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Department of Nutrition, University of California, Davis, California 95616
Kidney function was evaluated in the progeny of rats fed a proteindeficient (6% casein) diet compared to those of rats fed a control (24% casein) diet throughout gestation. Control and deficient progeny were raised together by foster mothers in either normal-sized litters of 10 pups, or in small-sized litters of four pups in which they received increased nutrient intake. The ability to excrete a water load or to respond to ADH was impaired in the deficient progeny at 6 days after birth, but not at 13 days. Increased postnatal nutrient intake partially compensated for these reductions in function. Clomerular filtration rate and maximal tubular secretory capacity were significantly reduced in 22-day-old deficient animals. On a body weight basis increased postnatal nutrient intake produced a significant increase only in glomerular filtration rate of deficient animals. These reductions of function in deficient progeny are probably related to decreased nephron number caused by the prenatal deficiency.
KEY WORDS: kidney function prenatal protein deprivation
1 Supported in part by Public Health Research Grant no. HD-03158 from the National Institute of Child Health and Human Development.
2 To whom reprint requests should be sent.
Manuscript received 20 April 1973.