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  • Title: p63 and p73 are not required for the development and p53-dependent apoptosis of T cells.
    Author: Senoo M, Manis JP, Alt FW, McKeon F.
    Journal: Cancer Cell; 2004 Jul; 6(1):85-9. PubMed ID: 15261144.
    Abstract:
    The recent discoveries of p63 and p73, homologs of the tumor suppressor p53, raised the possibility of a network of these family members governing cell cycle arrest and apoptosis in response to stress. However, mice lacking p73 show no tendency for spontaneous tumors, and mutations in p63 or p73 are rare in human tumors, rendering any obligate role of these genes in cell death and tumor suppression unclear. In an effort to reconcile these incongruent data, we examined the genetic interactions between p53, p63, and p73 in well-established paradigms of p53-dependent and -independent T cell death using primary, genetically defined lymphocytes. Our findings challenge the generality of the notion that p63 and p73 are required for p53 function or for apoptosis in T cells.
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