Title : Chronic DHEAS administration facilitates hippocampal long-term potentiation via an amplification of Src-dependent NMDA receptor signaling.

Pub. Date : 2006 Sep

PMID : 16806295






7 Functional Relationships(s)
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1 Chronic DHEAS administration facilitates hippocampal long-term potentiation via an amplification of Src-dependent NMDA receptor signaling. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus
2 Here we report that the sub-threshold HFS could trigger the phosphorylation of Src and ERK2 in the DHEAS-treated rats, but not in control rats. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus
3 We found in slices obtained from the DHEAS-treated rats that NMDA-induced intracellular Ca2+([Ca2+]i) transients in CA1 pyramidal neurons were significantly potentiated, which was essential for the Src and ERK2 phosphorylations. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus
4 The activation of ERK2, a downstream factor of Src family kinase, was required for the DHEAS-facilitated LTP. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus
5 The Src family kinase inhibitor PP2, but not its inactive homologue PP3, attenuated the NMDA-induced [Ca2+]i increase and abolished the DHEAS-facilitated LTP. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus
6 This novel postsynaptic NMDAr/Src-mediated signal amplification through "NMDAr-Ca2+-->Src-->NMDAr-Ca2+" cycle may play a pivotal role in the DHEAS-facilitated LTP induction. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus
7 This novel postsynaptic NMDAr/Src-mediated signal amplification through "NMDAr-Ca2+-->Src-->NMDAr-Ca2+" cycle may play a pivotal role in the DHEAS-facilitated LTP induction. Dehydroepiandrosterone Sulfate SRC proto-oncogene, non-receptor tyrosine kinase Rattus norvegicus