Low Serum Testosterone Concentration in Middle-aged Men with Type 2 Diabetes

Endocrine Journal

Michiaki FUKUI⁴  Naoto NAKAMURA⁴  Yoshihiro KITAGAWA³  Tsuneharu MIKI¹  Toshikazu YOSHIKAWA²  Jintetsu SOH¹  Goji HASEGAWA⁴  Muhei TANAKA⁴ 

[1] Department of Urology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science;Department of Inflammation and Immunology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science;Department of Endocrinology and Hematology, Osaka General Hospital of West Japan Railway Company;Department of Endocrinology and Metabolism, Kyoto Prefectural University of Medicine

关键词: Testosterone;    Luteinizing Hormone;    Type 2 diabetes;    Men;   

DOI  :  10.1507/endocrj.K07-077

学科分类：内分泌与代谢学

来源: Japan Endocrine Society

【 摘 要 】

References(29)Cited-By(26)Low concentrations of endogenous androgens have been linked with insulin resistance and atherosclerosis. Men with diabetes have been reported to have lower serum testosterone concentration than non-diabetic men; however, there has never been a large study. The aim of this study was to investigate if endogenous androgen concentration is certainly lower in a relatively large number of Japanese patients with type 2 diabetes compared with healthy men, and to identify what factors may be associated with low serum testosterone concentrations in men with type 2 diabetes. Serum free testosterone concentrations were measured in 524 healthy men and in 331 consecutive Japanese men with type 2 diabetes between 40 and 69 years old. In addition, we investigated the relationships between serum free testosterone concentration and luteinizing hormone (LH) concentration as well as major cardiovascular risk factors including age, blood pressure, plasma lipid concentration, glycemic control (HbA1c), and BMI. Serum free testosterone concentrations were lower in men with type 2 diabetes than in healthy men in the 40-49 years group (10.9 ± 3.3 vs. 14.0 ± 3.6 pg/ml, P<0.0001), in the 50-59 years group (10.4 ± 3.2 vs. 12.1 ± 2.9 pg/ml, P<0.0001), and in the 60-69 years group (9.5 ± 2.6 vs. 10.5 ± 2.9 pg/ml, P = 0.0104). A negative correlation was found between serum free testosterone and LH concentrations (r = -0.326, P<0.0001). In conclusion, serum free testosterone concentration is certainly lower in a relatively large number of Japanese patients with type 2 diabetes compared with healthy men with each decade of life between 40 and 69 years old.

【 授权许可】

Unknown