| First Author | Hanabuchi S | Year | 1994 |
| Journal | Proc Natl Acad Sci U S A | Volume | 91 |
| Issue | 11 | Pages | 4930-4 |
| PubMed ID | 7515183 | Mgi Jnum | J:18623 |
| Mgi Id | MGI:66884 | Doi | 10.1073/pnas.91.11.4930 |
| Citation | Hanabuchi S, et al. (1994) Fas and its ligand in a general mechanism of T-cell-mediated cytotoxicity. Proc Natl Acad Sci U S A 91(11):4930-4 |
| abstractText | To investigate the mechanisms of T-cell-mediated cytotoxicity, we estimated the involvement of apoptosis-inducing Fas molecule on the target cells and its ligand on the effector cells. When redirected by ConA or anti-CD3 monoclonal antibody, a CD4+ T-cell clone, BK1, could lyse the target cells expressing wild-type Fas molecule but not those expressing death signaling-deficient mutants. This indicates the involvement of Fas-mediated signal transduction in the target cell lysis by BK1. Anti-CD3-activated but not resting BK1 expressed Fas ligand as detected by binding of a soluble Fas-Ig fusion protein, and the BK1-mediated cytotoxicity was blocked by the addition of Fas-Ig, implicating the inducible Fas ligand in the BK1 cytotoxicity. Ability to exert the Fas-mediated cytotoxicity was not confined to BK1, but splenic CD4+ T cells and, to a lesser extent, CD8+ T cells could also exert the Fas-dependent target cell lysis. This indicates that the Fas-mediated target cell lytic pathway can be generally involved in the T-cell-mediated cytotoxicity. Interestingly, CD4+ T cells prepared from gld/gld mice did not mediate the Fas-mediated cytotoxicity, indicating defective expression of functional Fas ligand in gld mice. |
