PMID: 9554568Apr 29, 1998Paper

Effects of a meat meal on renal sodium handling and sodium balance

Mineral and Electrolyte Metabolism
M CirilloN G De Santo

Abstract

Protein ingestion increases renal blood flow and glomerular filtration rate (GFR). This study investigated in healthy adults if the renal response to protein ingestion includes changes in urinary sodium (Na) excretion rate and Na balance. Renal clearance of Na and inulin (used as index of GFR) were measured in 25 healthy adults before (90 min) and after (180 min) a standard meal and, as control, before and after administration of water and Na-chloride (saline). The meal consisted of red lean meat (2 g protein/kg body weight); in control experiments, water and Na were given to match water and Na content of the meal. ANOVA for repeated measures, Student's t-test, and linear regression were used for statistical analysis. GFR and urinary Na excretion increased over baseline after the meal (p < 0.001), not after saline. The post-meal natriuretic response was accounted for an early (0-90 min) increase in glomerular filtered load of Na (p < 0.001) and a late (90-180 min) reduction in tubular Na reabsorption (p < 0.02). Urine flow rate and plasma Na did not significantly change after the meal and in control experiments. Analysis of Na balance showed that post-meal Na excretion was significantly higher than baseline also after Na balanc...Continue Reading

Citations

Jun 27, 2007·Nature Clinical Practice. Nephrology·Denis Fouque, Michel Aparicio
Jul 28, 2001·Kidney International·P AnastasioN G De Santo
Jul 4, 2012·Hypertension·Sadayoshi Ito
Mar 16, 2002·Journal of Human Hypertension·M CirilloUNKNOWN Gubbio Study Research Group
Jan 4, 2021·International Urology and Nephrology·Andreea MihalacheGabriel Mircescu

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