ODP145 Epigenesis of 11beta-hydroxysteroid dehydrogenase 1 in the adipose tissue of aldosterone-producing adenoma

OBJECTIVE: 11Beta-hydroxysteroid dehydrogenase 1 (11beta-HSD1) is the key enzyme of metabolic syndrome. The transcript-specific epigenetic regulation of 11b-HSD1 (HSD11B1) is reported. We examined the HSD11B1 mRNA level and methylation status of the promoter region of the HSD11B1 in the adipose tissue of patients with aldosterone-producing adenoma (APA). METHODS: We evaluated 10 adipose tissue specimens from patients with primary aldosteronism due to aldosterone-producing adenoma (APA) and 7 tissue specimens from patients with non-functioning adrenal adenoma (NFA). Primary aldosteronism was diagnosed according to the guideline of the Japanese Endocrine Society. The expression levels of HSD11B1 mRNA were quantified using a real time PCR. Isolated DNA was treated with bisulfite and amplified using primers specific for the humanHSD11B1promoter region. RESULTS: The glycohemoglobin level was significantly higher in patients with APA compared with those with NFA (p<0. 05). Blood pressure was significantly elevated in patients with APA compared with those with NFA (p<0. 01). TheHSD11B1 mRNA level and the enzyme activities were significantly increased in the adipose tissues of APA compared with NFA patients (p<0. 05). The methylation ratio was not significantly different between APA and NFA patients. CONCLUSION: These results may suggest that adipose11beta-HSD1 contributes to metabolic abnormalities in APA. The pathophysiological significance of epigenetic control of 11beta-HSD1 gene in the adipose tissue should be further studied. Presentation: No date and time listed