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Loss of imprinting of Cdkn1c protects against age and diet-induced obesity

Van de Pette, Mathew, Tunster, Simon J. and John, Rosalind M. 2018. Loss of imprinting of Cdkn1c protects against age and diet-induced obesity. International Journal of Molecular Sciences 19 (9) , 2734. 10.3390/ijms19092734

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Cyclin dependent kinase inhibitor 1c (Cdkn1c) is a maternally expressed imprinted gene with roles in embryonic development, post-natal metabolism and behaviour. Using mouse models with altered dosages of Cdkn1c, we have previously identified a role for the gene in promoting brown adipose tissue formation. Here, we use these transgenic mouse lines to model the loss of imprinting of Cdkn1c in adulthood. We demonstrate that only a two-fold increase in the expression of Cdkn1c during development is sufficient to protect against age-related weight gain in addition to glucose and insulin intolerance. Further to this, we show that the loss of imprinting of Cdkn1c protects against diet-induced obesity. Bisulphite sequencing was performed to test the stability of the two differentially methylated regions that regulate Cdkn1c imprinting, and both were found to be unaltered in aged or diet-challenged adipose tissue, despite drastic reductions in Cdkn1c expression. These data demonstrate a critical role for Cdkn1c in regulating adult adipose tissue, with modest changes in expression capable of protecting against both age and diet-induced obesity and metabolic syndrome, with a natural decline in Cdkn1c expression observed that may contribute to less healthy metabolic aging. Finally, we have observed a post-natal insensitivity of the imprint to environmental factors, in contrast to recent observations of an in utero sensitivity

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: MDPI
ISSN: 1422-0067
Date of First Compliant Deposit: 22 October 2018
Date of Acceptance: 10 September 2018
Last Modified: 24 Jun 2022 07:37

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