Journal article

Short-term inhibition of autophagy benefits pancreatic beta-cells by augmenting ether lipids and peroxisomal function, and by countering depletion of n-3 polyunsaturated fatty acids after fat-feeding

Kwan Yi Chu, Natalie Mellet, Le May Thai, Peter J Meikle, Trevor J Biden

Molecular Metabolism | ELSEVIER | Published : 2020


OBJECTIVE: Investigations of autophagy in β-cells have usually focused on its homeostatic function. More dynamic roles in inhibiting glucose-stimulated insulin secretion (GSIS), potentially involving remodelling of cellular lipids, have been suggested from in vitro studies but not evaluated in vivo. METHODS: We employed temporally-regulated deletion of the essential autophagy gene, Atg7, in β-cells. Mice were fed chow or high-fat diets (HFD), in conjunction with deletion of Atg7 for the last 3 weeks (short-term model) or 9 weeks (long-term model). Standard in vivo metabolic phenotyping was undertaken, and 450 lipid species in islets quantified ex vivo using mass spectroscopy (MS). MIN6 cells..

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University of Melbourne Researchers


Funding Acknowledgements

This work was supported by Project Grants and Research Fellowships from the National Health and Medical Research Council of Australia to T.J.B. and P.J.M