Abstract

Serum alpha-immunoreactive inhibin was evaluated in 16 male renal transplant recipients with stabilized renal function of mean age 38.5 +/- 10.7 years and was compared to that in sex- and age-matched 17 haemodialyzed patients; 10 patients with chronic renal failure and 26 healthy normal men (controls). Serum LH, FSH, prolactin and testosterone were also measured simultaneously, in the same samples. In renal transplant recipients, inhibin was found significantly higher than that in controls (P<0.001), 25% however of the values were in the normal range. In contrast, all haemodialyzed patients showed highly elevated inhibin values of inhibin were also highly elevated compared to those in normals. A negative correlation was noticed between inhibin and FSH only in controls (r(s) = -0.610, P<0.005). In renal transplant recipients, inhibin showed a strong correlation with serum creatinine (sCr) (r(s) = 0.710, P<0.008), while in the case of graft rejection the rise of sCr was immediately followed by a parallel increase of inhibin. In conclusion, the highly elevated inhibin in uraemic men not improved by haemodialysis and persistent after successful renal transplantation, might be implicated in the pronounced hypergonadotropic hypogonadism of haemodialyzed patients and the remaining dysfunction of hypothalamic-pituitary-testicular axis in renal transplant recipients.

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