Section 9
Chapter 8,480

Dipeptidyl peptidase IV (CD26) on human lymphocytes. Synthetic inhibitors of and antibodies against dipeptidyl peptidase IV suppress the proliferation of pokeweed mitogen-stimulated peripheral blood mononuclear cells, and IL-2 and IL-6 production

Reinhold, D.; Bank, U.; Bühling, F.; Neubert, K.; Mattern, T.; Ulmer, A.J.; Flad, H.D.; Ansorge, S.

Immunobiology 188(4-5): 403-414


ISSN/ISBN: 0171-2985
PMID: 7902330
DOI: 10.1016/s0171-2985(11)80223-8
Accession: 008479553

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In the present report, we describe that synthetic inhibitors of and polyclonal and monoclonal antibodies against the membrane ectoenzyme dipeptidyl peptidase IV (DP IV, CD26) inhibit the production of IL-2 and IL-6 and, concomitantly, DNA synthesis of pokeweed mitogen-stimulated peripheral blood mononuclear cells (PBMC). The release of IL-1 and TNF-alpha, was not influenced under these conditions. The data support the hypothesis that DP IV, possibly in conjunction with other peptidase, is involved in the regulation of activation and proliferation of T lymphocytes.

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