Stimulation of the beta-subunit of the IL-2 receptor induces MHC-unrestricted cytotoxicity in T acute lymphoblastic leukemia cells and normal thymocytes

Colamonici, O.R.; Rosolen, A.; Cole, D.; Kirsch, I.; Felix, C.; Poplack, D.G.; Neckers, L.M.

Journal of Immunology 141(4): 1202-1205

1988


ISSN/ISBN: 0022-1767
PMID: 3135323
Document Number: 317370
Recently, several laboratories have identified a novel protein(s) of 70,000 to 75,000 Da (IL-2R .beta.-subunit), that when expressed with the p55 Tac protein (.alpha.-subunit), imparts high affinity IL-2 binding. Expression of the .beta.-subunit mediates acquisition of MHC-unrestricted cytotoxicity in large granular lymphocytes. We report that thymocytes and T acute lymphoblastic leukemia cells express the .beta.-subunit of the IL-2R in the absence of detectable .alpha.-subunit expression and that IL-2 induces acquisition of MHC-unrestricted cytotoxic activity in these cells through stimulation of the .beta.-subunit.

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