Regulation of direct adipose tissue free fatty acid storage during mixed meal ingestion and high free fatty acid concentration conditions.

Regulation of direct adipose tissue free fatty acid storage during mixed meal ingestion and high free fatty acid concentration conditions. Am J Physiol Endocrinol Metab. 2020 Nov 16;: Authors: Zhang L, Hames KC, Jensen MD Abstract Direct free fatty acid (FFA) storage into adipocytes relates to body fat distribution. Adipose tissue CD36, acyl-CoA synthetase (ACS), and diacylglycerol acetyl-transferase (DGAT) may account for some of the between-depot and inter-individual variability in FFA storage. These studies were to test whether CD36, ACS or DGAT might be important for direct palmitate storage under meal-ingestion or high FFA conditions. We measured upper (UBSQ) and lower body subcutaneous (LBSQ) adipose tissue FFA storage rates by infusing palmitate tracers intravenously and performing adipose biopsies under hypoinsulinemic (high FFA) and mixed meal conditions. We recruited 5 postmenopausal women, physically active males (5) and females (5), and sedentary males (5) and females (5). We found: 1) the ratio of UBSQ to LBSQ DGAT activity predicted the ratio of palmitate storage (adjusted R = 0.25, F = 8.0, P = 0.01, 95% CI (0.07, 0.48)) under high FFA conditions; 2) the ratio of UBSQ to LBSQ ACS activity predicted the ratio of palmitate storage under meal conditions (adjusted R = 0.18, F = 6.3, P = 0.02, 95% CI (0.12, 1.28); 3) LBSQ direct palmitate storage rates were significantly less in physically active than sedentary adults; 3); ...
Source: American Journal of Physiology. Endocrinology and Metabolism - Category: Physiology Authors: Tags: Am J Physiol Endocrinol Metab Source Type: research