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Identification of a neurocircuit underlying regulation of feeding by stress-related emotional responses.

ABSTRACT: Feeding is known to be profoundly affected by stress-related emotional states and eating disorders are comorbid with psychiatric symptoms and altered emotional responses. The neural basis underlying feeding regulation by stress-related emotional changes is poorly understood. Here, we identify a novel projection from the paraventricular hypothalamus (PVH) to the ventral lateral septum (LSv) that shows a scalable regulation on feeding and behavioral changes related to emotion. Weak photostimulation of glutamatergic PVH→LSv terminals elicits stress-related self-grooming and strong photostimulation causes fear-related escape jumping associated with respective weak and strong inhibition on feeding. In contrast, inhibition of glutamatergic inputs to LSv increases feeding with signs of reduced anxiety. LSv-projecting neurons are concentrated in rostral PVH. LSv and LSv-projecting PVH neurons are activated by stressors in vivo, whereas feeding bouts were associated with reduced activity of these neurons. Thus, PVH→LSv neurotransmission underlies dynamic feeding by orchestrating emotional states, providing a novel neural circuit substrate underlying comorbidity between eating abnormalities and psychiatric disorders.

SUBMITTER: Xu Y

PROVIDER: S-EPMC6671997 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:[Correction Notice: An Erratum for this article was reported online in Emotion on Sep 5 2019 (see record 2019-52812-001). In the article, two text call outs for figures are incorrect. At the end of the "Negative emotional responses" section under the "Psychological Stress Responses" heading, "(see Figure 7)" should have been deleted. Under the "Negative task-related ruminative thoughts" heading in that same section, "(see Figure 5)" in the first paragraph should be "(see Figure 7)."] Expressing emotions is a common strategy for coping with stress. Yet, little is known about the effects of using this strategy in close relationships, or when and for whom emotional expression is effective. This study examined romantic partner responsiveness and the dispositional tendency to use emotional approach coping (EAC; the processing and expression of emotions) as moderators of the effects of experimentally manipulated emotional expression on stress responses to a laboratory stressor. We brought couples (N = 145) to the lab and randomly assigned 1 partner (the participant) to perform a stressful task. We manipulated whether participants expressed their feelings about the task to their partner (expression vs. no-expression), and whether participants received supportive messages from their partners (as an indicator of partner responsiveness; support vs. no-support). We examined physiological stress responses (cortisol and salivary alpha-amylase [sAA]), negative emotional stress responses (anxiety and self-conscious emotions), and post-task ruminative thoughts. Participants high in EAC showed larger sAA and cortisol responses and reported more negative post-task ruminative thoughts after emotionally expressing to their partners, but partner support mitigated the effect on cortisol. Participants low in EAC showed smaller cortisol responses and reported less negative emotional responses and fewer negative post-task ruminative thoughts after emotionally expressing to their partners. Receiving partner support reduced negative emotional responses for people high in EAC, but increased negative emotional responses for those low in EAC. These results may help explain when and for whom emotional expression is an effective means of coping in the immediate context of a stressor. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

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Identification of a neurocircuit underlying regulation of feeding by stress-related emotional responses.

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