PMID: 8972739Dec 1, 1996Paper

Vitamin A deficiency increases inflammatory responses

Scandinavian Journal of Immunology
Ursula WiedermannUlf I Dahlgren

Abstract

The authors studied the influence of vitamin A deficiency on immediate and delayed type hypersensitivity as well as granulocyte-mediated inflammatory reactions in vitamin A depleted and control rats. The number of circulating leucocytes was 43% higher in the vitamin A deficient than in the control animals. The leucocytosis was a result of a general increase of white blood cells and was not due to an increase in one particular type. The ratio between CD4+ and CD8+ T cells was unchanged. The vitamin A deficient rats had a four times higher T-cell proliferative response and a two times higher interferon-gamma production in vitro than the control animals. In accordance, the DTH reaction was consistently higher in the vitamin A deficient rats. The granulocyte dependent inflammation, induced by olive oil injection, was also strongly enhanced in the vitamin A deficient rats compared with the controls. In addition, the spontaneous release of nitric oxide from the peritoneal phagocytes was five times higher in the vitamin A deficient animals. The number of peritoneal mast cells was about one and a half times higher in the vitamin A deficient than in the control animals. The density of IgE-receptors on the mast cells, the IgE receptor oc...Continue Reading

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