Biomedical subjects
M Heath
Publications and source records attributed to M Heath.
Therapeutic use of zoster-immune plasma: A report of 8 cases.
Varicella and herpes zoster can be serious or even fatal diseases in immunocompromised patients. However, they can be prevented or markedly attenuated by the administration of zoster-immune globulin (ZIG) or zoster-immune plasma (ZIP), but there is no established treatment once these disorders have occurred. Eight such patients were treated with ZIP, with promising results.
The pituitary-gonadal response to the gonadotrophin releasing hormone analogue D-Ser (TBU)6-Des Gly10-LHRH-ethylamide in normal men.
We have studied the dose-response characteristics of the LHRH analogue D-Ser (TBU)6-Des Gly10-LHRH-ethylamide administered subcutaneously to five normal male volunteers. The relative potency of the analogue is about sixty times (FSH) and forty times (LH) that of the parent peptide and the increased potency and duration of action of the analogue lead to enhanced biological effect in terms of testosterone release. The prolonged duration of action of the analogue suggests that a single daily dosage regime could be used although further chronic studies with this potent analogue should be undertaken in normal volunteers to determine optimum dosage schedules.
Dopamine is a physiological regulator of thyrotrophin (TSH) secretion in normal man.
Using a sensitive and precise radioimmunoassay for human TSH we have demonstrated significant elevations in serum TSH levels in euthyroid volunteers following administration of the dopamine receptor blocking drug metoclopramide when compared with placebo. The degree of TSH response is significantly greater in females than in males and is sustained over a 3-hour period after a single oral 10 mg dose of metoclopramide. The degree of TSH release after metoclopramide is inversely related to the basal TSH level suggesting that dopamine is a determinant of low daytime TSH levels and is thus implicated in the circadian rhythm of TSH secretion. Pretreatment with 10 mg of metoclopramide orally, one hour before TRH administration leads to significant enhancement of the TSH response to TRH. Our findings provide further evidence for the physiological inhibitory role of dopamine in the contol of TSH secretion in normal man. The possible mode of action of dopamine and the clinical implications of this neuroregulatory pathway are discussed.
Pituitary actions of somatostatin.
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Evidence for dopaminergic control of thyrotrophin secretion in man.
After administration of the dopamine-receptor-blocking drug, metoclopramide (10 mg orally), there is significant release of thyrotrophin (T.S.H.) in hypothyroid patients which is not evident in euthyroid subjects. This is not due to spontaneous fluctuation in basal T.S.H. levels, and it indicates inhibitory dopaminergic control of T.S.H. release in man. The lack of significant T.S.H. release in euthyroid subjects may be due to the inhibitory effects of normal circulating levels of T3 and T4 on T.S.H. release. The T.S.H. response in hypothyroidism is significantly correlated with both T3 and T4 levels, suggesting suppression of this inhibitory pathway in increasingly severe hypothyroidism.
"Quiet cries". Can I help? Will you listen?
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