Abstract
The rate of excretion of the total protein and albumin during an increase in diuresis after water loading was studied in healthy volunteers. In the control period, the excretion of protein (7.3–11.1 mg/2 h) and albumin (0.29–0.42 mg/2 h) was within of the physiological norm range. Water loading (20 ml/kg) caused water diuresis, urine formation rate increased by a factor of 15, and the reabsorption of solute-free water changed into its excretion. The increase in diuresis was accompanied by a statistically significant increase in the urinary protein and albumin excretion, as well as by an increase in the protein-to-creatinine ratio. After water loading, the excretion of total protein, as compared to the initial period, increased by a factor of 8.4, and of the albumin excretion, by a factor of 2.8, exceeding the generally accepted limits of the norm. The role of intraglomerule hemodynamics in the development of physiological proteinuria related to water diuresis is discussed.
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