hrp0097fc8.1 | Fat, metabolism and obesity 2 | ESPE2023

Aberrant expression of agouti signaling protein (ASIP) as a new cause of monogenic severe childhood obesity

Landgraf Kathrin , Kempf Elena , Stein Robert , Hanschkow Martha , Boczki Paula , Kühnen Peter , Kiess Wieland , Blüher Matthias , Körner Antje

Here we identified and characterized a heterozygous tandem duplication at the ASIP (agouti-signaling protein) gene locus causing ubiquitous, ectopic ASIP expression in a female index patient with extreme childhood obesity. In patient-derived adipose tissue samples, we observed pronounced differentiation of stroma-vascular fraction (SVF) cells into adipocytes in the patient compared to normal control cells. We further found reduced mitochondrial maximum respir...