1,720,981 research outputs found

    Pituitary responsiveness to gonadotrophin-releasing and thyrotrophin-releasing hormones in children receiving phenobarbitone.

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    The effect of long-term treatment with phenobarbitone on pituitary responsiveness to gonadotrophin-releasing hormone and thyrotrophin-releasing hormone was studied in 20 boys being treated with the drug to prevent febrile convulsions. Baseline concentrations of luteinising and follicle-stimulating hormones were reduced as well as the responses of these hormones to stimulation with gonadotrophin-releasing hormone. Baseline prolactin concentrations were raised in comparison with those in normal children. The response of prolactin to thyrotrophin-releasing hormone, however, was impaired only in the children who had been receiving the drug for a long time. Phenobarbitone had no effect on the secretion of growth hormone. Further studies should be carried out to ascertain how long these effects on pituitary function last after phenobarbitone is withdrawn and whether this interference with pituitary function modifies the child's subsequent development

    Dynamic evaluation of prolactin secretion in patients with oligospermia: effects of treatment with metergoline.

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    Serum prolactin levels were measured in 50 patients with oligospermia and in 20 control subjects under fasting conditions and following the administration of levodopa, pyridoxine, metoclopramide, and synthetic thyrotropin-releasing hormone. Four patients (8%) under fasting conditions had prolactin levels slightly above the normal range. However, no significant differences in prolactin behavior were detected between patients with hyperprolactinemia, patients with normal prolactin levels, and control subjects. The four patients with hyperprolactinemia were treated with metergoline, an ergoline derivative. Metergoline administration promptly reduced the prolactin levels. Spermatogenesis was restored in three patients after 4 to 5 months of treatment

    Suppression of electroacupuncture(EA)-induced beta-endorphin and ACTH release by hydrocortisone in man. Absence of effects on EA-induced anaesthesia.

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    Auricular electroacupuncture (EA) increased plasma ACTH and beta-endorphin levels significantly in 10 patients receiving EA as an analgesic aid during surgery. Pre-treatment with iv hydrocortisone (200 mg) completely suppressed both ACTH and beta-endorphin release in response to EA without significantly affecting EA anaesthesia in 6 other patients and in a patient with Addison's disease
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