Northwestern University

Nov
17
Fri 12:00 PM

"Roles of TRPC channels in temporal bridging in the hippocampus"

When: Friday, November 17, 2017
12:00 PM - 1:00 PM  

Where: Ward Building, 5-230, 303 E. Chicago Avenue, Chicago, IL 60611 map it

Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students

Contact: Donna Daviston   312.503.1687

Group: Department of Physiology Seminars

Category: Lectures & Meetings

Description:

The department of Physiology welcomes Motoharu Yoshida, Ph.D., Group Leader, with the Leibniz Institute for Neurobiology (LIN) and German Center for Neurodegenerative Diseases (DZNE) Magdeburg, Germany

Abstract:

Persistent firing is believed to support temporal bridging tasks such as working memory and trace conditioning. Although recurrent synaptic excitation is widely believed to support persistent firing, recent studies have established that neurons can support persistent firing through an intrinsic cellular mechanisms. Here, I will demonstrate that individual hippocampal pyramidal cells support persistent firing through the transient receptor potential-canonical (TRPC) channels under cholinergic receptor activation. In contrast, this persistent firing is suppressed by noradrenaline (NA) and serotonin (5HT) through cAMP elevation, which is in line with impaired working memory in high NA and 5HT. In addition, mice with TRPC5 channel knockout were impaired in trace-fear conditioning, suggesting that TRPC channels supports temporal bridging function in vivo. Furthermore, computational simulations indicate that TRPC channels may support "time cell" activity observed in the hippocampus.

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