Association of Obesity-Mediated Insulin Resistance and Hypothalamic Volumes: Possible Sex Differences
Joint Authors
Convit, Antonio
Ha, Jenny
Cohen, Jessica I.
Tirsi, A.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-09-11
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The hypothalamus is important in hunger and metabolism.
Although a lot is known about the basic role of the human hypothalamus, less is known about how the in vivo volume is affected in obesity, particularly among adolescents.
Based on pediatric body mass index percentiles, 95 participants were assigned to lean or obese groups.
All subjects had medical evaluations, including fasting blood tests, to assess insulin sensitivity and circulating CRP and neurotrophins (NGF and BDNF) and an MRI of the brain.
Hypothalamic volumes were measured by a segmentation method combining manual and automated steps.
Overall, obese participants had descriptively smaller hypothalamic volumes, although this difference did not reach statistical significance; however, among obese participants, females had significantly smaller hypothalamic volumes than their male counterparts.
There was a significant interaction between insulin resistance and sex on hypothalamus volume; obese females with significant insulin resistance have smaller hypothalamic volumes than obese males.
Obese adolescents had higher circulating CRP and neurotrophin levels.
Furthermore, among obese females, BDNF concentrations were inversely associated with hypothalamus volumes (r=−0.48).
Given this negative association between BDNF and hypothalamus volumes among obese insulin-resistant females, elevated neurotrophin levels may suggest an attempt at protective compensation.
American Psychological Association (APA)
Ha, Jenny& Cohen, Jessica I.& Tirsi, A.& Convit, Antonio. 2013. Association of Obesity-Mediated Insulin Resistance and Hypothalamic Volumes: Possible Sex Differences. Disease Markers،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1031205
Modern Language Association (MLA)
Ha, Jenny…[et al.]. Association of Obesity-Mediated Insulin Resistance and Hypothalamic Volumes: Possible Sex Differences. Disease Markers No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-1031205
American Medical Association (AMA)
Ha, Jenny& Cohen, Jessica I.& Tirsi, A.& Convit, Antonio. Association of Obesity-Mediated Insulin Resistance and Hypothalamic Volumes: Possible Sex Differences. Disease Markers. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-1031205
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1031205