AI Article Synopsis
- The central amygdala (CeA) has different types of neurons that help control how animals eat and react to danger.
- Researchers used a special technique to find nine groups of these neurons, with some linked to wanting food and others linked to avoiding things.
- They discovered that certain neurons in the CeA react strongly when animals are hungry or see food, and these neurons help regulate eating by connecting with another part of the brain that affects hunger.
Article Abstract
The central amygdala (CeA) consists of numerous genetically defined inhibitory neurons that control defensive and appetitive behaviors including feeding. Transcriptomic signatures of cell types and their links to function remain poorly understood. Using single-nucleus RNA sequencing, we describe nine CeA cell clusters, of which four are mostly associated with appetitive and two with aversive behaviors. To analyze the activation mechanism of appetitive CeA neurons, we characterized serotonin receptor 2a (Htr2a)-expressing neurons (CeA) that comprise three appetitive clusters and were previously shown to promote feeding. In vivo calcium imaging revealed that CeA neurons are activated by fasting, the hormone ghrelin, and the presence of food. Moreover, these neurons are required for the orexigenic effects of ghrelin. Appetitive CeA neurons responsive to fasting and ghrelin project to the parabrachial nucleus (PBN) causing inhibition of target PBN neurons. These results illustrate how the transcriptomic diversification of CeA neurons relates to fasting and hormone-regulated feeding behavior.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10208581 | PMC |
| http://dx.doi.org/10.1126/sciadv.adf6521 | DOI Listing |
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