A glucose-stimulated BOLD fMRI study of hypothalamic dysfunction in mice fed a high-fat and high-sucrose diet
Mohr, Adélaïde A ; Garcia-Serrano, Alba M LU ; Vieira, João Pp LU ; Skoug, Cecilia LU ; Davidsson, Henrik and Duarte, João MN LU
(2021)
In Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
41(7).
p.1734-1743
- Abstract
The hypothalamus is the central regulator of energy homeostasis. Hypothalamic neuronal circuits are disrupted upon overfeeding, and play a role in the development of metabolic disorders. While mouse models have been extensively employed for understanding the mechanisms of hypothalamic dysfunction, functional magnetic resonance imaging (fMRI) on hypothalamic nuclei has been challenging. We implemented a robust glucose-induced fMRI paradigm that allows to repeatedly investigate hypothalamic responses to glucose. This approach was used to test the hypothesis that hypothalamic nuclei functioning is impaired in mice exposed to a high-fat and high-sucrose diet (HFHSD) for seven days. The blood oxygen level-dependent (BOLD) fMRI signal was... (More)
The hypothalamus is the central regulator of energy homeostasis. Hypothalamic neuronal circuits are disrupted upon overfeeding, and play a role in the development of metabolic disorders. While mouse models have been extensively employed for understanding the mechanisms of hypothalamic dysfunction, functional magnetic resonance imaging (fMRI) on hypothalamic nuclei has been challenging. We implemented a robust glucose-induced fMRI paradigm that allows to repeatedly investigate hypothalamic responses to glucose. This approach was used to test the hypothesis that hypothalamic nuclei functioning is impaired in mice exposed to a high-fat and high-sucrose diet (HFHSD) for seven days. The blood oxygen level-dependent (BOLD) fMRI signal was measured from brains of mice under light isoflurane anaesthesia, during which a 2.6 g/kg glucose load was administered. The mouse hypothalamus responded to glucose but not saline administration with a biphasic BOLD fMRI signal reduction. Relative to controls, HFHSD-fed mice showed attenuated or blunted responses in arcuate nucleus, lateral hypothalamus, ventromedial nucleus and dorsomedial nucleus, but not in paraventricular nucleus. In sum, we have developed an fMRI paradigm that is able to determine dysfunction of glucose-sensing neuronal circuits within the mouse hypothalamus in a non-invasive manner.
(Less)
- author
- Mohr, Adélaïde A
; Garcia-Serrano, Alba M
LU
; Vieira, João Pp
LU
; Skoug, Cecilia
LU
; Davidsson, Henrik
and Duarte, João MN
LU
- organization
- publishing date
- 2021-07-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
- volume
- 41
- issue
- 7
- pages
- 10 pages
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:32757742
- scopus:85089175494
- ISSN
- 1559-7016
- DOI
- 10.1177/0271678X20942397
- language
- English
- LU publication?
- yes
- id
- 66903bac-faec-4c3b-8364-1189415326ab
- date added to LUP
- 2020-08-12 14:50:44
- date last changed
- 2024-07-10 20:15:58
@article{66903bac-faec-4c3b-8364-1189415326ab,
abstract = {{<p>The hypothalamus is the central regulator of energy homeostasis. Hypothalamic neuronal circuits are disrupted upon overfeeding, and play a role in the development of metabolic disorders. While mouse models have been extensively employed for understanding the mechanisms of hypothalamic dysfunction, functional magnetic resonance imaging (fMRI) on hypothalamic nuclei has been challenging. We implemented a robust glucose-induced fMRI paradigm that allows to repeatedly investigate hypothalamic responses to glucose. This approach was used to test the hypothesis that hypothalamic nuclei functioning is impaired in mice exposed to a high-fat and high-sucrose diet (HFHSD) for seven days. The blood oxygen level-dependent (BOLD) fMRI signal was measured from brains of mice under light isoflurane anaesthesia, during which a 2.6 g/kg glucose load was administered. The mouse hypothalamus responded to glucose but not saline administration with a biphasic BOLD fMRI signal reduction. Relative to controls, HFHSD-fed mice showed attenuated or blunted responses in arcuate nucleus, lateral hypothalamus, ventromedial nucleus and dorsomedial nucleus, but not in paraventricular nucleus. In sum, we have developed an fMRI paradigm that is able to determine dysfunction of glucose-sensing neuronal circuits within the mouse hypothalamus in a non-invasive manner.</p>}},
author = {{Mohr, Adélaïde A and Garcia-Serrano, Alba M and Vieira, João Pp and Skoug, Cecilia and Davidsson, Henrik and Duarte, João MN}},
issn = {{1559-7016}},
language = {{eng}},
month = {{07}},
number = {{7}},
pages = {{1734--1743}},
publisher = {{Nature Publishing Group}},
series = {{Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism}},
title = {{A glucose-stimulated BOLD fMRI study of hypothalamic dysfunction in mice fed a high-fat and high-sucrose diet}},
url = {{http://dx.doi.org/10.1177/0271678X20942397}},
doi = {{10.1177/0271678X20942397}},
volume = {{41}},
year = {{2021}},
}