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  • Title: ITM2BS regulates apoptosis by inducing loss of mitochondrial membrane potential.
    Author: Fleischer A, Ayllon V, Rebollo A.
    Journal: Eur J Immunol; 2002 Dec; 32(12):3498-505. PubMed ID: 12442332.
    Abstract:
    Apoptosis is a conserved and essential feature of homeostasis. We have found that expression of the short form of integral membrane protein 2B (ITM2B(S)) in IL-2-stimulated T cells, as well as in COS-7 cells, induces apoptosis. Biochemical and confocal studies demonstrate that association of ITM2B(S) with mitochondria correlates with loss of mitochondrial membrane potential, release of cytochrome c to the cytosol and, as a final consequence, induction of apoptosis in IL-2-stimulated cells. Moreover, the apoptosis-inducing activity of ITM2B(S) correlates with caspase 9 and caspase 3 activation. Taken together, our results demonstrate that ITM2B(S) induces apoptosis via a caspase-dependent mitochondrial pathway.
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