Expression of Leu-19 (NKH-1) antigen on IL 2-dependent cytotoxic and non-cytotoxic T cell lines

L. L. Lanier, A. M. Le, A. Ding, E. L. Evans, A. M. Krensky, C. Clayberger, J. H. Phillips

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58 Scopus citations


The Leu-19 (NKH-1) antigen is expressed on human peripheral blood NK cells and a subset of peripheral blood cytotoxic T lymphocytes that kill 'NK-sensitive' tumor cell targets without major histocompatibility complex restriction. In the present study, we demonstrate that the Leu-19 (NKH-1) antigen is also expressed on most interleukin 2 (IL 2) dependent T cell lines and clones that have been maintained in long term culture. The Leu-19 (NKH-1) antigen expressed on an antigen-specific, class I directed cytotoxic T lymphocyte cell line was an ~200,000 to 220,000 dalton protein, similar to Leu-19 (NKH-1) protein expressed on natural killer cells and KG1a, an immature stem cell leukemia cell line. Furthermore, Leu-19 (NKH-1) was expressed on both CD4+ and CD8+ IL 2 dependent T cell clones, and was present on both cytotoxic and non-cytotoxic T cell clones. Thus expression of Leu-19 (NKH-1) antigen on cultured cell lines does not directly correlate with cytotoxic function, antigenic specificity, or cell lineage.

Original languageEnglish (US)
Pages (from-to)2019-2023
Number of pages5
JournalJournal of Immunology
Issue number7
StatePublished - 1987

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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