New PDF release: Advances in Immunology, Vol. 31

By Henry G. Kunkel (ed.), Frank J. Dixon (ed.)

ISBN-10: 0120224313

ISBN-13: 9780120224319

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Extra resources for Advances in Immunology, Vol. 31

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Cellular immunity reactions constitute the basis of resistance to intracellular pathogenic microorganisms, such as the facultative intracellular bacteria, protozoa, viruses, and fungi. An important component of macrophage activation is also found in the response to tumors. Delayed-type hypersensitivity and contact sensitivity reactions are expressions of cellular immunity reactions to protein antigens or contact sensitizers deposited in the skin. These reactions involve immune T cells that, by way of various soluble mediators, call forth and activate macrophages .

They transferred peritoneal cells from outbred immune guinea pigs into nonimmune recipients, which were skin tested hours later. Successful transfer required a large number of lymphoid cells. Subsequent to these pioneering studies, lymphocyte transfers employed cells from inbred animals to avoid primarily tissue rejection. , 1963) and were attempting to transfer the capacity to develop delayed sensitivity from a “responder” to a “nonresponder” guinea pig. Lymphoid cells from responder guinea pigs were able to transfer the reaction to responder, but not to nonresponder, guinea pigs, suggesting to Green et al.

The primed T cells also generated an important nonspecific helper effect (assayed by challenging with DNP on an unrelated carrier protein) that was most pronounced with high numbers of T cells. Erb and Feldman made a number of observations regarding the role of the macrophage in the generation of helper T cells. Marked differences were found between the response to hemocyanin added to the T cell-macrophage cultures either in soluble form or bound to Sepharose 2B particles. Thus, macrophages syngeneic with the T cells were required for the response to soluble hemocyanin-or the synthetic polypeptide (TG)-A-L (Erb and Feldman, 1975a,b).

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Advances in Immunology, Vol. 31 by Henry G. Kunkel (ed.), Frank J. Dixon (ed.)

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