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  • Title: [Further research on the role of prostanoids in controlling renal function in humans in normal potassium balance and acute experimental potassium depletion. III: Effects of indomethacin in potassium depletion].
    Author: Agnoli GC, Borgatti R, Cacciari M, Dorigoni S, Garutti C, Ikonomu E, Lenzi P, Marinelli M.
    Journal: Boll Soc Ital Biol Sper; 1989 Feb; 65(2):163-9. PubMed ID: 2751884.
    Abstract:
    The renal function was evaluated by clearance (cl.) method during hypotonic polyuria and successive relative antidiuresis induced by lysine-8-vasopressin administration. Four 15 min and two 60 min cl. periods were performed in hypotonic polyuria and antidiuresis, respectively. Glomerular filtration rate was estimated by creatinine cl., the osmotic cl. (Cosm' CH2O), the absolute and fractional excretions of water, sodium, potassium and chloride were determined by usual methods. The urinary PGE2, 6-keto-PGF1 alpha and TxB2 excretions were determined by RIA method. The study protocol was applied on 14 healthy women in acute potassium depletion, treated with indomethacin (100 mg i.m. at the end of the oral water load). In Group D3 (n = 6) in the presence of a greater potassium cumulative deficit (198.4 +/- 22.2 meq), in hypotonic polyuria, indomethacin induces significant effects as an increase of fractional hydro-electrolytic reabsorptions and as a decrease of urinary prostanoid excretion. The indomethacin tubular action in potassium depletion differs significantly from that observed in normal potassium balance.
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