Endocrine Abstracts

Endothelin-1 has various paracrine and endocrine effects on the male reproductive system. It is supposed that the testosterone is probably responsible for the higher endothelin-1 levels in males and this may be related with the enhanced cardiovascular risk in males of reproductive age. In order to study in more detail the relationship between endothelin-1 and testosterone, we have studied 37 male patients with various forms of hypogonadism (14 with hypergonadotrophic hypogonad...

Introduction: Low endogenous testosterone levels are related to the metabolic syndrome /MS/ and diabetes type 2 in middle-aged and elderly men, but little is known about interrelations testosterone-insulin in younger hyperinsulinemic men. Recent studies have shown that the night melatonin in males with hypogonadotropic hypogonadism is significantly higher in comparison with the healthy men, while it is significantly reduced in patients with hypergonadotropic hypogonadism. Howe...