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Updated: Aug 10, 2026

Use of Single Chain MHC Technology to Investigate Co-agonism in Human CD8+ T Cell Activation
Published on: February 28, 2019
Identification of a co-stimulatory factor for human T cell proliferation
1Department of Medicine, New York Medical College, Valhalla 10595.
Abstract:
A factor enhancing proliferation of human peripheral blood lymphocytes (PBL) was identified in the culture supernatant of a human myeloid cell line HL-60 after ion exchange separation. Partially purified lymphocyte growth enhancing factor (LGEF) was found to enhance mitogen-stimulated PBL or purified T cell proliferation in a dose dependent fashion. LGEF alone did not stimulate PBL or T cell proliferation and its activity was dependent on the presence of mitogen. LGEF mediated T cell proliferation was neither accompanied by an increase in the level of IL-2 receptor expression, nor was dependent on the presence of monocytes. In ELISA assay antibodies against IL-1, IL-2, IL-3 and IL-6 did not recognize the LGEF preparation. The comparison of LGEF with other lymphokines is discussed.
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