Risso A, Cosulich ME, Rubartelli A, Mazza MR, Bargellesi A. MLR3 molecule is an activation antigen shared by human B, T lymphocytes and T cell precursors.
Eur J Immunol 1989;
19:323-8. [PMID:
2784767 DOI:
10.1002/eji.1830190216]
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Abstract
MLR3 molecule is a membrane glycoprotein (mol. mass range 28-34 kDa) present on activated, but not resting human peripheral T cells, B cells and thymocytes. Its kinetics of appearance on the cell surface (3 h after the addition of the inductive signal to the cells) suggests that it is an early activation antigen. The proliferative response of cultured T and B lymphocytes and thymocytes to different activation signals is inhibited by the addition of MLR3 monoclonal antibody. Moreover the antibody in combination with non-mitogenic doses of phorbol myristate acetate leads to proliferation of thymocytes and resting B and T lymphocytes. In the latter, synthesis of interleukin 2 is also induced. Biochemical analysis of MLR3 antigen indicates that it is a phosphorylated protein with N-linked sugar moieties. Together these data suggest a role for MLR3 antigen in the signal transduction process during activation, both for mature lymphocytes and for T cell precursors.
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