Delineation of human thymocytes with or without functional potential by CD1-specific antibodies

International Immunology
A de la HeraC Martínez

Abstract

Hematopoietic precursors lacking T cell antigen receptors (TCR-CD3-) and CD4 and CD8 surface markers (i.e. double-negative thymocytes) give rise to functionally mature T lymphocytes. Yet their major progeny are immunologically unresponsive thymocytes in spite of having acquired TCR-CD3 and CD4-CD8. Because only mature thymocytes migrate to peripheral lymphoid organs and most thymocytes die in situ, the knowledge of the events associated with functional maturation in the double-negative thymocyte progeny is a fundamental question in T cell development. We reasoned that a clue to trace the fate of early human thymocytes may perhaps come from the study of the developmental acquisition of CD1 antigen, currently used to define better the functionally inert CD4+8+ (double-positive) stage and absent in mature, medullary thymocytes and peripheral T cells. By using antibodies specific for CD1 (HTA 1/T6) we show here that a large fraction of double-negative thymocytes also express CD1. CD1+3-, CD1+3+, CD1-3+, and CD1-3- subsets all exist. The CD1+3- subset generates CD1+3-4-8+ precursors of CD1+ double-positive cells. A large portion of the CD1+3+ subset bears TCR gamma delta-CD3 complexes. The CD1- subsets are responsive in assays of fu...Continue Reading

Citations

Jan 1, 1992·International Journal of Clinical & Laboratory Research·A Poggi, M R Zocchi
Jan 1, 1991·The Journal of Experimental Medicine·A de la HeraA Tunnacliffe
Nov 1, 1991·Scandinavian Journal of Immunology·J M AlonsoC Martínez
Jan 1, 1992·APMIS : Acta Pathologica, Microbiologica, Et Immunologica Scandinavica·D GigliottiM Hansson
Jul 14, 2005·Immunology·Marek SinkoraWolfgang Holtmeier
Jan 5, 2007·The Journal of Immunology : Official Journal of the American Association of Immunologists·Marek SinkoraWolfgang Holtmeier

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