CD98: A type II transmembrane glycoprotein expressed from the beginning of primitive and definitive hematopoiesis may play a critical role in the development of hematopoietic cells

Andrew P. Warren, Kalpana Patel, David J. McConkev, Ronald Palacios

Research output: Contribution to journalArticle


In our search for cell surface markers expressed on hematopoietic stem cells and/or very early progenitor cells we found that the Joro 177 monoclonal antibody (MoAb) bound to most hematopoietic cells in day 8/8.5 yolk sac, day 12 fetal liver, and day 13 fetal thymocytes; it stained hematopoietic stem cells and less immature lymphoid, myeloid, and erythroid- lineage cells, but not most thymocytes and splenic lymphocytes in adult mice. Joro 177 MoAb stimulated tyrosine phosphorylation of an ~125-kD protein and induced homotypic aggregation of lymphoid progenitor cells. Importantly, Joro 177 MoAb inhibited cell survival/growth and consequently the generation of lymphoid, myeloid, and erythroid lineage cells in vitro from early Lin- hematopoietic precursors. Joro 177 MoAb induced apoptosis of hematopoietic progenitor cells. Molecular cloning and expression indicated that Joro 177 MoAb recognizes a type II transmembrane protein, which is the mouse homologue of the human CD98 heavy chain gene. We suggest that CD98 is a cell membrane receptor involved in the control of cell survival/death of hematopoietic cells.

Original languageEnglish (US)
Pages (from-to)3676-3687
Number of pages12
Issue number9
StatePublished - May 1 1996


ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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