Pyridostigmine fails to increase either spontaneous or GHRH-stimulated GH secretion during day or night in growth hormone-insufficient children.

Abstract:

:OBJECTIVE The aim of the study was to investigate whether pyridostigmine, a cholinesterase inhibitor which is thought to act at the hypothalamus to inhibit somatostatin secretion, would augment spontaneous or GHRH-stimulated serum GH levels in patients with GH-insufficiency. DESIGN Oral pyridostigmine 60 mg or placebo was administered at the start of a 9-h subcutaneous infusion of either GHRH (1-29)NH2 10 micrograms/kg/h or saline control. Studies were performed during the daytime (0900-1800 h) in five patients, and the night-time (2100-0600 h) in a further five. PATIENTS Ten short, pre-pubertal children (aged 6-11 years; eight boys) with growth hormone insufficiency were studied. MEASURES Blood for serum GH was sampled every 20 min, and analysed using the PULSAR program. RESULTS The subcutaneous infusion of GHRH 10 micrograms/kg/h increased mean serum GH levels (+/- SEM): by day 17.7(+/- 6.8) vs placebo 2.2(+/- 0.4) mU/l (P less than 0.01), and by night 26.9(+/- 3.3) vs 5.5(+/- 1.3) mU/l (P less than 0.05). There was a significant rise in mean 'baseline' GH concentration: by day 5.5(+/- 1.7) vs 1.0(+/- 0.0) mU/l (P less than 0.05); and night 8.2(+/- 2.7) vs 1.3(+/- 0.3) mU/l (P less than 0.05). Pyridostigmine failed to produce a significant overall increase in either spontaneous or GHRH-stimulated GH secretion by day or night, although there was a significant rise in mean GH levels during the 3 h following pyridostigmine administration in the morning: 4.4(+/- 1.1) vs 2.4(+/- 0.5) mU/l (P less than 0.001). GHRH or pyridostigmine given singly or in combination had no significant effect on the number of pulses. Side-effects attributable to pyridostigmine occurred in seven children. CONCLUSIONS Pyridostigmine, either on its own or as an adjuvant therapy in combination with GHRH, acts for only a brief time and does not offer any potential benefit in the management of children with short stature.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Kirk JM,Ross RJ,Trainer PJ,Froud AL,Davies SC,Savage MO,Besser GM

doi

10.1111/j.1365-2265.1991.tb00313.x

subject

Has Abstract

pub_date

1991-05-01 00:00:00

pages

407-11

issue

5

eissn

0300-0664

issn

1365-2265

journal_volume

34

pub_type

临床试验,杂志文章,随机对照试验
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    更新日期:1992-03-01 00:00:00

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    更新日期:1996-01-01 00:00:00

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    pub_type: 临床试验,杂志文章

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    更新日期:1991-08-01 00:00:00

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    authors: Walczyk A,Kopczyński J,Gąsior-Perczak D,Pałyga I,Kowalik A,Chrapek M,Hejnold M,Góźdź S,Kowalska A

    更新日期:2019-08-01 00:00:00

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    pub_type: 杂志文章,评审

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  • Influence of thyroxine treatment on thyroid size and anti-thyroid peroxidase antibodies in Hashimoto's thyroiditis.

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    journal_title:Clinical endocrinology

    pub_type: 临床试验,杂志文章,随机对照试验

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