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  • Title: Abnormal renal response to twenty-four-hour dehydration and fasting in Nagase analbuminemic rats.
    Author: Yaschuk DM, Sanker JM, Zhou J, Wilson N, Keeler R.
    Journal: Lab Anim Sci; 1991 Dec; 41(6):577-80. PubMed ID: 1667201.
    Abstract:
    We assessed renal function in fasting adult Nagase analbuminemic rats (NAR). Sodium output in male and female NAR was 68% and 46%, respectively, of the output of age- and sex-matched normal Sprague-Dawley (SD) rats. Potassium excretion was significantly greater in female NAR but there was no difference between male NAR and SD rats. The renal clearances of urea and creatinine were reduced in NAR with corresponding increases in plasma concentrations; however, the urea and creatinine concentrations were not different in plasma samples taken from normally fed and hydrated SD and NAR rats. Exchangeable body sodium and sodium space was significantly larger in normally fed and hydrated NAR than in SD but there were no differences in plasma sodium concentrations or plasma volumes. Although plasma concentrations of albumin in NAR were only about 0.07% of the concentration in SD rats, the renal clearance of albumin in NAR was threefold greater. Kidney weights in NAR were 10 to 16% less than in SD rats but liver weights were 22 to 42% greater. Clearly, renal function was markedly abnormal in Nagase rats during a 24-hour fast.
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