Sodium requirement of adult cats for maintenance based on plasma aldosterone concentration

Shiguang Yu, James Morris

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

The sodium requirement of adult cats for maintenance was determined using a randomized block design of eight dietary sodium treatments (0.1, 0.4, 0.5, 0.66, 0.8, 1.2, 1.6 or 2.0 g Na/kg in a casein-lactalbumin-based purified diet) administered for periods of 4 wk. A total of 35 adult specific-pathogen-free domestic shorthaired cats (26 males and 9 females, 1.5-3 y of age) was given an equilibration diet (2 g Na/kg) for 14 d before assignment (or reassignment) to the treatments. A total of 12 cats (8 males, 4 females) was randomly assigned to the lowest six levels of sodium, and four cats to the highest two sodium levels. Cats consuming the diet containing 0.1 g Na/kg had significantly elevated aldosterone concentration in plasma, and packed cell volume. In addition, these cats exhibited anorexia, body weight loss, reduced urinary specific gravity and sodium excretion, and had a negative sodium balance. However, adult cats did not develop polydypsia and polyuria reported in sodium-deficient kittens. Cats given the diet containing 0.66 g Na/kg did not have an increased packed cell volume, but aldosterone concentration in the plasma was significantly elevated. However, cats given diets containing ≥0.8 g Na/kg had plasma aldosterone concentrations ≤0.7 nmol/L (reference value for sodium-replete cats) and normal packed-cell volumes. A minimal sodium requirement of adult cats for maintenance of 0.8 g Na/kg diet (energy density = 22 kJ/g diet) or 0.4 mmol Na · kg body weight-1 · d-1 is proposed.

Original languageEnglish (US)
Pages (from-to)419-423
Number of pages5
JournalJournal of Nutrition
Volume129
Issue number2
StatePublished - Feb 16 1999

Keywords

  • Aldosterone
  • Cats
  • Requirement
  • Sodium

ASJC Scopus subject areas

  • Food Science
  • Medicine (miscellaneous)

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