Time course of serum prolactin and sex hormones following successful renal transplantation.

BACKGROUND

Chronic renal failure is commonly associated with disturbances in hypothalamic-pituitary-gonadal function.

METHODS

The gonadotrophins, prolactin and estradiol or testosterone levels were measured immediately before renal transplantation, at discharge from the transplantation unit (19 +/- 8 days after Tx) and 6 months after transplantation in 21 patients, 7 females and 14 males, age range 21-60 years.

RESULTS

The mean prolactin level was high during uremia and decreased rapidly after transplantation, from 441 to 167 mU/l in males and from 1,057 to 521 mU/l in females. Hypergonadotrophism was seen in most uremic patients, with the mean LH and FSH levels of 14.2 and 6.0 U/l in males and 14.7 and 4.0 U/l in females, respectively. A temporary change to hypogonadotrophic hypogonadism took place 2-3 weeks after transplantation and was followed by normalization of the hypothalamic-gonadal function. The levels of circulating sex steroids were suppressed when the patients were discharged from the transplantation unit but returned to the normal range at 6 months.

CONCLUSIONS

We conclude that renal transplantation corrects the hyperprolactinemia induced by uremia and is followed by rapid onset of restoration of the hypothalamic-pituitary-gonadal axis.