Influence of early or late dietary restriction on life-span and immunological parameters in MRL/Mp-lpr/lpr mice

C. Kubo, N. K. Day, R. A. Good

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Abstract

Reduced food intake doubles and even triples the life span of (NZB x NZW)F1 (B/W) mice and greatly influences immunological function. Here we investigate the influence of food intake while keeping vitamin and mineral intake constant in mice of the MRL/Mp-lpr/lpr (MRL/l) strain. Restriction of foot intake greatly prolongs life. This influence also was seen when dietary restriction was imposed later in life. Dietary restriction inhibited development of lymphoproliferative disease and greatly decreased the numbers of cells in thymus, lymph nodes, and spleen. It also delayed development of glomerulonephritis and maintained certain immunological responses. Proliferative responses to phytohemagglutinin, pokeweed mitogen, or allogeneic spleen cells were maintained in the mice fed a low-calorie diet from 6 wk. Imposing diet at 12 wk had a lesser influence than earlier restriction. These dietary influences did not depress formation of anti-DNA antibodies or circulating immunocomplexes. MRL/l mice show an apparently extremely low production of interleukin 2, and dietary restriction increased the capacity of lymph node cells but not spleen cells to produce this immunomodulator.

Original languageEnglish
Pages (from-to)5831-5835
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume81
Issue number18 I
DOIs
Publication statusPublished - 1984

All Science Journal Classification (ASJC) codes

  • General

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