| First Author | Roy S | Year | 2005 |
| Journal | J Immunol | Volume | 175 |
| Issue | 10 | Pages | 6361-7 |
| PubMed ID | 16272288 | Mgi Jnum | J:119353 |
| Mgi Id | MGI:3701894 | Doi | 10.4049/jimmunol.175.10.6361 |
| Citation | Roy S, et al. (2005) Morphine induces CD4+ T cell IL-4 expression through an adenylyl cyclase mechanism independent of the protein kinase A pathway. J Immunol 175(10):6361-7 |
| abstractText | Impaired host defense mechanisms after major operative procedures and trauma are recognized as important factors in the development of infectious complication. Trauma is associated with impaired cellular immunity and CD4+ T cell Th2 differentiation. We have previously implicated morphine treatment as a possible mechanism for Th2 differentiation after injury. In this investigation we first establish that morphine treatment in vivo results in Th2 differentiation and that this effect is mediated through a naltrexone-sensitive opioid receptor. We investigated the intracellular mechanism by which morphine controls CD4+ T cell differentiation and demonstrate that morphine treatment in vitro 1) increases anti CD3/CD28 Ab-induced CD4+ T cell IL-4 protein synthesis, IL-4 mRNA, and GATA-3 mRNA accumulation through a pertussis toxin-sensitive receptor; 2) results in a dose-dependent increase in anti-CD3/CD28 Ab-induced CD4+ T cell cytoplasmic cAMP concentration; and 3) increases the forskolin-stimulated cytoplasmic cAMP level through a pertussis toxin-sensitive receptor. We also demonstrate that chronic morphine treatment increases anti-CD3/CD28 Ab-induced IL-4 promoter activity and IL-4 immunoprotein expression through a p38 MAPK-dependent, but protein kinase A- and Erk1/Erk2-independent, mechanism. |
