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Trpc3 ltd

Sang Jeong Kim
Cerebellar long-term depression (LTD) is induced by repetitive pairing of both synaptic inputs provided by climbing fibers (CFs) and parallel fibers (PFs), especially when CF stimulation followed by burst of PFs. Metabotropic glutamate receptor type 1 (mGluR1)-dependent signaling in Purkinje cells is critically involved in the induction of cerebellar LTD. Signaling pathway of mGluR1 has two limbs: one is IP3 receptor-mediated Ca release from intracellular Ca store and the other is activation of transient receptor potential canonical (TRPC) channels...
June 2013: Cerebellum
Charmaine Nelson, Maike D Glitsch
Canonical transient receptor potential (TRPC) channels are widely expressed in the brain and play several roles in development and normal neuronal function. In the cerebellum, Purkinje cell TRPC3 channels underlie the slow excitatory postsynaptic potential observed after parallel fiber stimulation. In these cells TRPC3 channel opening requires stimulation of metabotropic glutamate receptor 1, activation of which can also lead to the induction of long term depression (LTD), which underlies cerebellar motor learning...
February 24, 2012: Journal of Biological Chemistry
Anton N Shuvaev, Hajime Horiuchi, Takahiro Seki, Hanna Goenawan, Tomohiko Irie, Akira Iizuka, Norio Sakai, Hirokazu Hirai
Cerebellar Purkinje cells (PCs) express a large amount of the γ isoform of protein kinase C (PKCγ) and a modest level of PKCα. The PKCγ is involved in the pruning of climbing fiber (CF) synapses from developing PCs, and PKCα plays a critical role in long-term depression (LTD) at parallel fiber (PF)-PC synapses. Moreover, the PKC signaling in PCs negatively modulates the nonselective transient receptor potential cation channel type 3 (TRPC3), the opening of which elicits slow EPSCs at PF-PC synapses. Autosomal dominant spinocerebellar ataxia type 14 (SCA14) is caused by mutations in PKCγ...
October 5, 2011: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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