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Chrna5 and Lynx Prototoxins Identify Acetylcholine Super-Responder Subplate Neurons

2022; RELX Group (Netherlands); Linguagem: Inglês

10.2139/ssrn.4199635

1556-5068

Sridevi Venkatesan, Tianhui Chen, Yupeng Liu, Eric E. Turner, Shreejoy J. Tripathy, Evelyn K. Lambe,

Ion channel regulation and function

Attention depends on cholinergic excitation of prefrontal neurons but is sensitive to perturbation of α5-containing nicotinic receptors encoded by Chrna5. However, Chrna5-expressing (Chrna5+) neurons remain enigmatic, despite their potential as a target to improve attention. Here, we generate complex transgenic mice to probe Chrna5+ neurons and their sensitivity to endogenous acetylcholine. Through opto-physiological experiments, we discover that Chrna5+ neurons contain a distinct population of acetylcholine super-responders. Leveraging single-cell transcriptomics, we discover molecular markers conferring subplate identity on this subset. We determine that Chrna5+ super-responders express a unique complement of GPI-anchored lynx prototoxin genes (Lypd1, Ly6g6e, and Lypd6b), predicting distinct nicotinic receptor regulation. To manipulate lynx regulation of endogenous nicotinic responses, we developed a pharmacological strategy guided by transcriptomic predictions. Overall, we reveal Chrna5-Cre mice as a transgenic tool to target the diversity of subplate neurons in adulthood, yielding new molecular strategies to manipulate their cholinergic activation relevant to attention disorders.Funding Information: We acknowledge the generous support of the Canadian Institutes of Health Research (CIHR MOP 89825, EKL; CIHR PJT-153101, EKL), the Canada Research Chair in Developmental Cortical Physiology (EKL), an Ontario Graduate Scholarship (SV).Declaration of Interests: None.Ethics Approval Statement: Guidelines of the 506 Canadian Council on Animal Care were followed, and all experimental procedures were approved 507 by the Faculty of Medicine Animal Care Committee at the University of Toronto.