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Involvement of tyrosine phosphatase CD45 in apoptosis.

Abstract : CD45 is a transmembrane molecule with phosphatase activity expressed in all nucleated haematopoietic cells and plays a major role in immune cells. It is a protein tyrosine phosphatase that is essential for antigen-receptor-mediated signal transduction by regulating Src family members that initiate TCR signaling. CD45 is being attributed a new emerging role as an apoptosis regulator. Cross-linking of the extracellular portion of the CD45 by monoclonal antibodies and by galectin-1, can induce apoptosis in T and B cells. Interestingly, this phosphatase has also been involved in nuclear apoptosis induced by mitochondrial perturbing agents. Furthermore, it is involved in apoptosis induced by HIV-1. CD45 defect is implicated in various diseases such as severe-combined immunodeficiency disease (SCID), acquired immunodeficiency syndrome (AIDS), lymphoma and multiple myelomas. The understanding of the mechanisms by which CD45 regulates apoptosis would be very useful in disease treatment.
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Contributor : Charles M. Dozois Connect in order to contact the contributor
Submitted on : Wednesday, May 1, 2013 - 11:01:32 PM
Last modification on : Monday, October 8, 2018 - 5:44:04 PM

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Geneviève Dupéré-Minier, Philippe Desharnais, Jacques Bernier. Involvement of tyrosine phosphatase CD45 in apoptosis.. Apoptosis, 2010, 15 (1), pp.1-13. ⟨10.1007/s10495-009-0413-z⟩. ⟨pasteur-00819587⟩



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