The effect of hunger state on hypothalamic functional connectivity in response to food cues
Kullmann, Stephanie; Veit, Ralf; Crabtree, Daniel R; Buosi, William; Androutsos, Odysseas; Johnstone, Alexandra M; Manios, Yannis; Preissl, Hubert; Smeets, Paul A M
(2023) Human Brain Mapping, volume 44, issue 2, pp. 418 - 428
(Article)
Abstract
The neural underpinnings of the integration of internal and external cues that reflect nutritional status are poorly understood in humans. The hypothalamus is a key integrative area involved in short- and long-term energy intake regulation. Hence, we examined the effect of hunger state on the hypothalamus network using functional magnetic
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resonance imaging. In a multicenter study, participants performed a food cue viewing task either fasted or sated on two separate days. We evaluated hypothalamic functional connectivity (FC) using psychophysiological interactions during high versus low caloric food cue viewing in 107 adults (divided into four groups based on age and body mass index [BMI]; age range 24-76 years; BMI range 19.5-41.5 kg/m 2 ). In the sated compared to the fasted condition, the hypothalamus showed significantly higher FC with the bilateral caudate, the left insula and parts of the left inferior frontal cortex. Interestingly, we observed a significant interaction between hunger state and BMI group in the dorsolateral prefrontal cortex (DLPFC). Participants with normal weight compared to overweight and obesity showed higher FC between the hypothalamus and DLPFC in the fasted condition. The current study showed that task-based FC of the hypothalamus can be modulated by internal (hunger state) and external cues (i.e., food cues with varying caloric content) with a general enhanced communication in the sated state and obesity-associated differences in hypothalamus to DLPFC communication. This could potentially promote overeating in persons with obesity.
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Keywords: fMRI, food cue reactivity, functional connectivity, hunger, insulin resistance, obesity, satiety, Clinical Neurology, Neurology, Radiological and Ultrasound Technology, Radiology Nuclear Medicine and imaging, Anatomy, Journal Article
ISSN: 1065-9471
Publisher: Wiley-Liss Inc.
Note: Funding Information: Federal Ministry of Education and Research to the German Center for Diabetes Research (DZD), Grant/Award Number: 01GI0925; FP7 Food, Agriculture and Fisheries, Biotechnology, Grant/Award Number: 266408; European Union Seventh Framework Programme Funding information Funding Information: This work was financially supported by the European Union Seventh Framework Programme (FP7/2007–2013) for research, technological development, and demonstration under grant agreement 266408 (Full4Health, www.full4health.eu ). Furthermore, the study was supported in parts by a grant (01GI0925) from the Federal Ministry of Education and Research (BMBF) to the German Center for Diabetes Research (DZD e.V.). Publisher Copyright: © 2022 The Authors. Human Brain Mapping published by Wiley Periodicals LLC.
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