A Thalamic Orphan Receptor Drives Variability in Short-Term Memory.

Cell (2020-10-01)
Kuangfu Hsiao, Chelsea Noble, Wendy Pitman, Nakul Yadav, Suraj Kumar, Gregory R Keele, Andrea Terceros, Matt Kanke, Tara Conniff, Christopher Cheleuitte-Nieves, Ravi Tolwani, Praveen Sethupathy, Priyamvada Rajasethupathy

Working memory is a form of short-term memory that involves maintaining and updating task-relevant information toward goal-directed pursuits. Classical models posit persistent activity in prefrontal cortex (PFC) as a primary neural correlate, but emerging views suggest additional mechanisms may exist. We screened ∼200 genetically diverse mice on a working memory task and identified a genetic locus on chromosome 5 that contributes to a substantial proportion (17%) of the phenotypic variance. Within the locus, we identified a gene encoding an orphan G-protein-coupled receptor, Gpr12, which is sufficient to drive substantial and bidirectional changes in working memory. Molecular, cellular, and imaging studies revealed that Gpr12 enables high thalamus-PFC synchrony to support memory maintenance and choice accuracy. These findings identify an orphan receptor as a potent modifier of short-term memory and supplement classical PFC-based models with an emerging thalamus-centric framework for the mechanistic understanding of working memory.

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HT-22 Mouse Hippocampal Neuronal Cell Line, HT-22 mouse neuronal cell line is a valuable cell model for studies of glutamate-induced toxicity in neuronal cells.