AffiliationDepartment of Endocrinology, Christie Hospital and Holt Radium Institute, Manchester M20 9BX, UK
MetadataShow full item record
AbstractGrowth hormone (GH) secretion has been studied under physiological conditions and in response to standard pharmacological stimuli in 14 children, who had previously received cranial irradiation between two and fourteen years earlier. All fourteen showed a blunted GH response to insulin hypoglycaemia and, in twelve, the GH response to arginine stimulation was also subnormal. Physiological GH secretion was studied by measuring integrated GH concentrations in 30 min blood samples collected over a 24 hour period by a continuous withdrawal pump. Compared to normal controls (n = 5), the irradiated patients showed a significant reduction in the mean integrated GH concentration (2.2: 8.8 mU/l; p less than 0.002), the total 24 hour GH output (mean 105.7 mU vs. 391.7 mU; p less than 0.002) and the mean GH output during the first six hours of sleep (mean 48.2 mU vs. 226 mU; p less than 0.002). There was no significant correlation between the maximum peak GH response to either pharmacological test and the total 24 hour GH output. Conventionally most short children undergo two provocative tests of GH release and if the GH response to one of the two tests is normal, it is usually assumed that GH production is adequate. Adopting these criteria in this study it would have been assumed incorrectly that GH production was normal in two children. Nonetheless all 14 children showed a blunted GH response to an ITT as well as a reduced total 24 hour GH output.(ABSTRACT TRUNCATED AT 250 WORDS)
CitationThe effects of cranial irradiation on growth hormone secretion. 1986, 75 (2):255-60 Acta Paediatr Scand
JournalActa Paediatrica Scandinavica
- Effects of low-dose cranial radiation on growth hormone secretory dynamics and hypothalamic-pituitary function.
- Authors: Costin G
- Issue date: 1988 Aug
- Evolution of growth hormone neurosecretory disturbance after cranial irradiation for childhood brain tumours: a prospective study.
- Authors: Spoudeas HA, Hindmarsh PC, Matthews DR, Brook CG
- Issue date: 1996 Aug
- Cranially irradiated adult cancer survivors may have normal spontaneous GH secretion in the presence of discordant peak GH responses to stimulation tests (compensated GH deficiency).
- Authors: Darzy KH, Thorner MO, Shalet SM
- Issue date: 2009 Feb
- Hypothalamic growth hormone releasing factor deficiency following cranial irradiation.
- Authors: Ahmed SR, Shalet SM
- Issue date: 1984 Nov
- Radiation and neuroregulatory control of growth hormone secretion.
- Authors: Ogilvy-Stuart AL, Wallace WH, Shalet SM
- Issue date: 1994 Aug