Avraham Y, Van Heukelom B, Zolotarev O, Magen I, Vorobiev L, Zwas DR. Insulin normalized brain metabolic status on a Model of Anorexia Nervosa in Mice.
Physiol Behav 2022;
249:113738. [PMID:
35182554 DOI:
10.1016/j.physbeh.2022.113738]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 10/19/2022]
Abstract
INTRODUCTION
Anorexia nervosa is a psycho-socio-biological disease, characterized by self-starvation and distorted perception of body weight. Patients often over-exercise. Insulin is an anabolic hormone that increases food intake and restores body fat and is present in low levels in anorexia nervosa patients: thus may have therapeutic potential in treating anorexia nervosa.
AIMS
to explore whether low levels insulin administration may result in recovery of cerebral function and restoration of metabolic disorder providing a treatment option for anorexia nervosa.
METHODS
Female Sabra mice maintained on DR of 2.0 hours per day for 32 days, in cages with or without wheel attached to an electronic counter (activity wheel). They were then permitted to eat ad libitum for additional 15 days. On the second week, mice were injected ip with 0.5U/kg long acting Insulin(Lantus) or saline and cognitive function was evaluated. Insulin administered three times a week during days 8-32. Mice euthanized on day 48 and cerebral levels of monoamines, 2-AG and expression of genes associated with metabolic status were evaluated.
RESULTS
Activity wheel mice decreased body weight, 2-AG, dopamine levels and 5-HT1A and increased Camkk2 and SIRT1 gene expression compared to mice without it. Insulin increased body weight, decreased revolutions, enhanced NPY and normalized Camkk2, SIRT-1, BDNF, elevated 2-AG and improved cognition in the wheel group.
CONCLUSION
low dose insulin administration to animal model of anorexia associated with exercise, led to alterations and normalization in brain metabolic status and improved cognition. Insulin should be further explored as potential novel treatment for anorexia nervosa.
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