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- W1570398970 abstract "Abstract Alloreactive CTL clones and naive CTL precursor cells (CTLp) from TCR-transgenic mice were analyzed for their response in total and in TCR-associated kinase activation upon stimulation with the relevant class I allo-APCs. The responses were found to be stronger and more sustained for the CTL clone and CTLp expressing a TCR previously characterized as CD8 coreceptor independent than for the CTL clone and CTLp expressing a TCR characterized as CD8 dependent. Unexpectedly, it was found that also in response to CD3 engagement, total and TCR-associated kinase activation were stronger and more sustained in the CTL clone and CTLp expressing the CD8-independent TCR. In both types of CTL clones, p56(lck) was found associated with the TCR complex, and CD3 components were found associated with CD8 before CD3 engagement. Upon CD3 engagement, ZAP-70 was also found associated with the TCR complex and the kinase activity (p56(lck)) associated with CD8 increased. This increase was more pronounced for the CD8-independent than for the CD8-dependent clone. An increased association of CD3zeta with CD8 was also detected after CD3 engagement for each clone. These data indicate that signals resulting from exclusive CD3 engagement can influence CD8 molecular associations and activate CD8-bound p56(lck). They further suggest that clonal differences exist that influence the efficiency of signaling upon binding of the same CD3 ligand. The observation that this property was shared between independently derived CTL clone and CTLp expressing the same TCR suggests that it may be acquired during repertoire selection." @default.
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- W1570398970 date "1997-01-01" @default.
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- W1570398970 title "Influence on CD8 of TCR/CD3-generated signals in CTL clones and CTL precursor cells." @default.
- W1570398970 doi "https://doi.org/10.4049/jimmunol.158.1.19" @default.
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