ABCG1 and obesity due to melanocortin 4 receptor deficiency: Visceral fat-derived EVs, regardless of obesity, facilitate macrophage-derived foam cell formation through the prevention of adenosine triphosphate (ATP)-binding cassette transporter 1 (ABCA1)- and ATP-binding cassette subfamily G member 1 (ABCG1)-mediated cholesterol efflux42.