Title : Neonatal capsaicin treatment affects rat thymocyte proliferation and cell death by modulating substance P and neurokinin-1 receptor expression.

Pub. Date : 2004

PMID : 15067207






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1 Neonatal capsaicin treatment affects rat thymocyte proliferation and cell death by modulating substance P and neurokinin-1 receptor expression. Capsaicin tachykinin receptor 1 Rattus norvegicus
2 Herein we provide evidence that substance P (SP) and its neurokinin-1 receptor (NK-1R) expressed on thymocytes counteract thymus depletion induced by neonatal capsaicin (CPS) treatment by affecting thymocyte proliferation and apoptotic death. Capsaicin tachykinin receptor 1 Rattus norvegicus
3 Herein we provide evidence that substance P (SP) and its neurokinin-1 receptor (NK-1R) expressed on thymocytes counteract thymus depletion induced by neonatal capsaicin (CPS) treatment by affecting thymocyte proliferation and apoptotic death. Capsaicin tachykinin receptor 1 Rattus norvegicus
4 Herein we provide evidence that substance P (SP) and its neurokinin-1 receptor (NK-1R) expressed on thymocytes counteract thymus depletion induced by neonatal capsaicin (CPS) treatment by affecting thymocyte proliferation and apoptotic death. Capsaicin tachykinin receptor 1 Rattus norvegicus
5 Herein we provide evidence that substance P (SP) and its neurokinin-1 receptor (NK-1R) expressed on thymocytes counteract thymus depletion induced by neonatal capsaicin (CPS) treatment by affecting thymocyte proliferation and apoptotic death. Capsaicin tachykinin receptor 1 Rattus norvegicus
6 SP administration reversed the CPS-mediated inhibitory effects on the total thymocyte number and subset distribution, namely CD4+ and CD4- CD8- cells, through its interaction with NK-1R as shown by concomitant NK-1R (SR140333) antagonist administration. Capsaicin tachykinin receptor 1 Rattus norvegicus
7 SP administration reversed the CPS-mediated inhibitory effects on the total thymocyte number and subset distribution, namely CD4+ and CD4- CD8- cells, through its interaction with NK-1R as shown by concomitant NK-1R (SR140333) antagonist administration. Capsaicin tachykinin receptor 1 Rattus norvegicus
8 By contrast, NK-1R mRNA levels were increased in thymocytes from CPS-treated rats. Capsaicin tachykinin receptor 1 Rattus norvegicus
9 Exogenous SP administration augmented PPT-A, SP and NK-1R thymocyte expression in CPS-treated rats, and this enhancement was antagonized by SR140333 administration. Capsaicin tachykinin receptor 1 Rattus norvegicus
10 Overall, our results strongly suggest that the immunomodulatory effects of neonatal CPS treatment on rat thymocyte functions are dependent on vanilloid-mediated regulation of SP and NK-1R functional expression by neuronal and immune cells. Capsaicin tachykinin receptor 1 Rattus norvegicus
11 Overall, our results strongly suggest that the immunomodulatory effects of neonatal CPS treatment on rat thymocyte functions are dependent on vanilloid-mediated regulation of SP and NK-1R functional expression by neuronal and immune cells. Capsaicin tachykinin receptor 1 Rattus norvegicus