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Cortisol production in adipose tissue is regulated by 11  β  -HSD1.  Objective . To determine whether there are differences in gene expression, enzyme activity, and protein content of the 11  β  -HSD1 enzyme in VAT (visceral adipose tissue) and SAT (subcutaneous adipose tissue) from obese compared to nonobese adults.  Methods . VAT and SAT samples were obtained from 32 obese subjects (BMI > 30 Kg/m 2 ) who underwent bariatric surgery and 15 samples from controls submitted to elective surgery. Fasting serum glucose, insulin, and lipids were measured. The expression of 11  β  -HSD1 was determined by RT-PCR, the enzyme activity by thin-layer chromatography, and the protein content by Western blot.  Results . Obese patients had higher cholesterol, insulin, and HOMA-IR compared to nonobese. There were no differences in VAT or SAT expression of 11  β  -HSD1 between obese and nonobese patients. However, we found lower 11  β  -HSD1 activity and protein content in VAT, in obese women versus nonobese women ( P  < 0.05). BMI and 11  β  -HSD1 enzyme activity and protein content in VAT correlated inversely in women.  Conclusions . Regulation of 11  β  -HSD1 activity in VAT from obese subjects appears to be gender specific, suggesting the existence of a possible protective mechanism modulating this enzyme activity leading to a decrease in the production of cortisol in this tissue.

isrn endocrinology

Differences in Expression, Content, and Activity of 11<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mi mathvariant="bold-italic">β</mml:mi></mml:mrow></mml:math>-HSD1 in Adipose Tissue between Obese Men and Women

Differences in Expression, Content, and Activity of 11β-HSD1 in Adipose Tissue between Obese Men and Women