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American Journal of Clinical Nutrition, Vol 49, 501-510, Copyright © 1989 by The American Society for Clinical Nutrition, Inc
ORIGINAL RESEARCH COMMUNICATIONS |
AM Pasatiempo, TA Bowman, CE Taylor and AC Ross
Department of Physiology and Biochemistry, Medical College of Pennsylvania, Philadelphia 19129.
To determine the ability of young rats to produce antibody against pneumococcal polysaccharide (SSS-III), weaning rats were fed a semipurified diet containing no retinol (A-) or 4 micrograms retinol/g diet (A+). Splenic antibody response specific to SSS-III was 17% (p less than or equal to 0.05) of control for A- Sprague-Dawley rats; similarly, the response of retinol-depleted Lewis rats was 22% (p less than or equal to 0.05) of pair-fed controls. No kinetic differences were observed in the antibody response between A- and control Lewis rats. Retinol depletion more markedly reduced the antibody response of male rats than female rats despite equally low tissue retinol concentrations. For both strains, retinol repletion near the time of immunization normalized antibody production. When male Lewis rats were fed the A- diet longer, the antibody response of A- rats was only 3% of pair-fed controls; repletion again normalized antibody production. Thus, retinol supplementation near the time of immunization can restore the immune response in previously compromised A- rats.
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