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Qiu, Weiwei; Hutch, Chelsea R; Wang, Yi; Wloszek, Jennifer; Rucker, Rachel A; Myers, Martin G; Sandoval, Darleen
eLife, 12/2023, Letnik: 12Journal Article
Several discrete groups of feeding-regulated neurons in the nucleus of the solitary tract ( ; NTS) suppress food intake, including avoidance-promoting neurons that express (NTS cells) and distinct - and -expressing neurons (NTS and NTS cells, respectively) that suppress food intake without promoting avoidance. To test potential synergies among these cell groups, we manipulated multiple NTS cell populations simultaneously. We found that activating multiple sets of NTS neurons (e.g. NTS plus NTS NTS , or NTS plus NTS NTS ) suppressed feeding more robustly than activating single populations. While activating groups of cells that include NTS neurons promoted conditioned taste avoidance (CTA), NTS activation produced no CTA despite abrogating feeding. Thus, the ability to promote CTA formation represents a dominant effect but activating multiple non-aversive populations augments the suppression of food intake without provoking avoidance. Furthermore, silencing multiple NTS neuron groups augmented food intake and body weight to a greater extent than silencing single populations, consistent with the notion that each of these NTS neuron populations plays crucial and cumulative roles in the control of energy balance. We found that silencing NTS neurons failed to blunt the weight-loss response to vertical sleeve gastrectomy (VSG) and that feeding activated many non-NTS neurons, however, suggesting that as-yet undefined NTS cell types must make additional contributions to the restraint of feeding.
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