| First Author | Kamsler A | Year | 2010 |
| Journal | Proc Natl Acad Sci U S A | Volume | 107 |
| Issue | 4 | Pages | 1618-23 |
| PubMed ID | 20080609 | Mgi Jnum | J:156540 |
| Mgi Id | MGI:4420851 | Doi | 10.1073/pnas.0912540107 |
| Citation | Kamsler A, et al. (2010) Presynaptic m1 muscarinic receptors are necessary for mGluR long-term depression in the hippocampus. Proc Natl Acad Sci U S A 107(4):1618-23 |
| abstractText | To investigate the role of M1 muscarininc acetylcholine receptors (m1 receptors) in metabotropic glutamate receptor (mGluR)-mediated long-term depression (LTD), we produced mouse lines in which deletion of the m1 gene is restricted to the forebrain (FB-m1KO) or hippocampal CA3 pyramidal neurons (CA3-m1KO). Stimulation in FB-m1KO hippocampal slices resulted in excitatory postsynaptic potentials and long-term synaptic plasticity (long-term potentiation and LTD) similar to controls. The mice were deficient in (S)-3,5-dihydroxyphenylglycine hydrate (DHPG)-induced mGluR LTD, which correlated with a presynaptic increase in the release of neurotransmitters. Protein kinase C (PKC) activity, which is downstream from both mGluRs and m1 receptors, was reduced in CA3 but not in CA1. The presynaptic requirement of m1 receptors was confirmed by the lack of DHPG-induced mGluR LTD in the CA1 of slices from CA3-m1KO mice. mGluR LTD was rescued by stimulating PKC activity pharmacologically in CA3-m1KO mice. These data confirm a role for PKC activation in presynaptic induction of mGluR LTD and distinguish between the roles of mGluRs and m1 receptors. |
