Abstract:
:In the present study, possible role of phosphodiesterase 7 (PDE7) in development and function of cytotoxic T lymphocyte (CTL) was examined using ASB16165, a specific inhibitor for PDE7. ASB16165 inhibited generation of CTL activity in mixed lymphocyte reaction (MLR), in which splenocytes from C57BL/6N mice were stimulated with those from BALB/c mice. Flow cytometric analysis revealed that ASB16165 suppressed induction of activated CD4+ as well as CD8+ T cells in MLR. In cell division analyses using 5-carboxyfluorescein diacetate succinimide ester (CFSE), ASB16165 was shown to markedly inhibit proliferation of CD4+ and CD8+ T cells. In addition, ASB16165 reduced effector function of CTL, while the effect was less than that observed in CTL induction in MLR. Forskolin and dibutyryl cAMP also inhibited both the induction and effector function of CTL. PDE4 inhibitor rolipram showed similar but weaker inhibition for the development and proliferation of CD8+ T cells compared with ASB16165, and failed to impair effector function of CTL. These findings suggest that PDE7 but not PDE4 has the major role in induction and function of CTL in mice, and that the effect might be mediated by elevation of intracellular cAMP level. ASB16165 may be useful for treatment of the diseases in which CTL has a pathogenic role (e.g. autoimmune diseases).
journal_name
Int Immunopharmacoljournal_title
International immunopharmacologyauthors
Kadoshima-Yamaoka K,Murakawa M,Goto M,Tanaka Y,Inoue H,Murafuji H,Hayashi Y,Nagahira K,Miura K,Nakatsuka T,Chamoto K,Fukuda Y,Nishimura Tdoi
10.1016/j.intimp.2008.10.005subject
Has Abstractpub_date
2009-01-01 00:00:00pages
97-102issue
1eissn
1567-5769issn
1878-1705pii
S1567-5769(08)00320-2journal_volume
9pub_type
杂志文章abstract::A considerable fraction of renal transplanted patients is susceptible to humoral rejection. Today well-established therapy regimens are available to control antibody-mediated rejection in the short term. Nevertheless, donor-specific antibodies persist and graft function deteriorates over time. This might be due to ins...
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