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Role of Nitric Oxide in Activation of Human T Lymphocytes Induced by Bacterial Superantigen

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Abstract

The involvement of nitric oxide (NO) in the regulation of human T cell response to bacterial superantigen (staphylococcal enterotoxin B) was studied. It was shown that stimulated T lymphocytes are the main source of NO. This superantigen markedly increased NO production and triggered the proliferative response of mononuclear cells from healthy individuals; the degree of apoptosis was low. In patients with purulent surgical diseases with high spontaneous and induced NO production, superantigen enhanced apoptosis of lymphocytes and induced anergy of T cells to enterotoxins. Increasing the concentration of NO in cultured cells from healthy individuals in the presence of NO donors also stimulated apoptosis and inhibited proliferative activity. These data suggest that NO regulates T lymphocyte response to superantigens. The increased production of NO probably contributes to the development of immunosuppression during bacterial infection.

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Authors and Affiliations

  1. Institute of Clinical Immunology, Siberian Division of the Russian Academy of Medical Sciences, Novosibirsk

    L. V. Sakhno

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  1. L. V. Sakhno
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  2. O. Yu. Leplina
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  3. M. N. Norkin
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  4. E. R. Chernykh
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  5. A. A. Ostanin
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Sakhno, L.V., Leplina, O.Y., Norkin, M.N. et al. Role of Nitric Oxide in Activation of Human T Lymphocytes Induced by Bacterial Superantigen. Bulletin of Experimental Biology and Medicine 130, 957–960 (2000). https://doi.org/10.1023/A:1002805605520

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