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  • Title: [Circadian rhythmus of the excretion of electrolytes and urinary proteins in rats].
    Author: Cambar J, Toussaint C, Nguyen Ba C.
    Journal: C R Seances Soc Biol Fil; 1978; 172(1):103-9. PubMed ID: 150880.
    Abstract:
    Circadian rhythms in urinary water, sodium, potassium and proteins excretion are studied in 45 rats living alone in metabolism cages. Urines are collected during 4 consecutive 6 hours long periods during 2 consecutive days. Large circadian variations of these parameters (especially water and proteins excretion and urinary protein concentration) are described. The influence of feeding rhythms on the circadian urinary excretion rhythms is discussed. It is proposed that nightly renal hemodynamic changes (during meal digestion or with high renin plasma levels) can induce modifications in glomerular filtration rate and electrolytes and macromolecules transglomerular flow.
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