The Concentration of beta-Carotene in Human Adipocytes, but Not the Whole-Body Adipocyte Stores, Is Reduced in Obesity
2014 (English)In: PLoS ONE, ISSN 1932-6203, Vol. 9, no 1, 85610- p.Article in journal (Refereed) Published
We have examined the concentration of beta-carotene in the fat of isolated abdominal subcutaneous adipocytes obtained from lean (BMIless than23 kg/m(2)), non-obese with higher BMI (23 less than= BMIless than28 kg/m(2)), obese (BMI greater than= 28 kg/m(2)), and from a group of obese subjects with type 2 diabetes. The concentration of b-carotene was 50% lower in the adipocytes from the obese and obese/diabetic groups compared with the lean and non-obese groups. Interestingly, the total amount of beta-carotene in the adipocyte stores of each subject was constant among all groups. Triacylglycerol constituted 92 +/- 1% (by weight) of the adipocyte lipids in the lean group and this was increased to 99 +/- 2% in the obese group with diabetes (pless than0.05). The concentration of cholesteryl esters was in all cases less than0.1 g per 100 g of total lipids, demonstrating that mature human adipocytes have negligible stores of cholesteryl ester. Our findings demonstrate that adipocyte concentrations of beta-carotene are reduced in obese subjects. The lower concentrations in adipocytes from subjects with type 2 diabetes apparently reflect subjects obesity. Our finding that whole-body stores of beta-carotene in adipocytes are constant raises new questions regarding what function it serves, as well as the mechanisms for maintaining constant levels in the face of varied adipose tissue mass among individuals over a period of time.
Place, publisher, year, edition, pages
Public Library of Science , 2014. Vol. 9, no 1, 85610- p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-104290DOI: 10.1371/journal.pone.0085610ISI: 000329862500259OAI: oai:DiVA.org:liu-104290DiVA: diva2:697185