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- W1932155681 abstract "Abstract Using a mouse allospecific lymph node (LN) CTL (H-2b) response to transplanted cells (H-2k), effector cells were shown to lyse C3H/HeJ or L929-Fas (H-2k) target cells in either a perforin-dependent or a Fas ligand (FasL)-dependent manner. C3H/HeJ.lpr targets or L929 targets lacking Fas were not sensitive to these effectors generated in perforin-deficient (Po) mice. By contrast, C3H/HeJ.lpr target cells and L929 were as responsive as C3H/HeJ and L929-Fas targets to the effectors generated in perforin wild-type (P+/+) mice. To measure potential bystander lysis in allogeneic responses, these same effector LN from either C57BL/6 P+/+ or P(o) mice were examined for lysis of C3H/HeJ (or C3H/HeJ.lpr) or L929-Fas (or L929) cocultured with 51Cr-labeled C57BL/6 (H-2b) target cells. Bystander lysis of C57BL/6 targets was observed only in those allogeneic responses where FasL was the defined mechanism of lysis. By contrast, perforin-mediated lysis was restricted by allo-recognition. Syngeneic (H-2b) targets that were not sensitive to Fas-mediated lysis were not lysed in a bystander fashion. Depletion of subsets of LN Po effectors (b anti-k) demonstrated that CD4+ T cells were primarily responsible for FasL-mediated direct and bystander lysis. FasL-mediated bystander lysis was also observed in H-2k anti-b reactions, except when the effectors were FasL mutant (gld). These data suggest that CTL responses to foreign Ag may evoke a certain amount of collateral damage to local host Fas-sensitive cells." @default.
- W1932155681 created "2016-06-24" @default.
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- W1932155681 date "1997-06-15" @default.
- W1932155681 modified "2023-10-16" @default.
- W1932155681 title "Fas ligand-mediated bystander lysis of syngeneic cells in response to an allogeneic stimulus." @default.
- W1932155681 doi "https://doi.org/10.4049/jimmunol.158.12.5765" @default.
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