Document Detail


Urinary excretion of adrenocortical steroid metabolites by pre-term human infants: trends from birth until 3 months post term.
MedLine Citation:
PMID:  8969936     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We report trends in urinary steroid excretion in serial 24 hour collections made using a novel method based on "Supersorb" type disposable nappies. Using capillary column gas chromatography, we quantified nine cortisol metabolites (FM) and 11 steroid sulphates (SM) in 6 infants born at 29-31 weeks gestation on 9 occasions until 24 weeks post delivery. In all infants, SM excretion increased progressively until 33-39 weeks (mean 36.8) post conception to maxima of (all values mg/24 h) 2.6-11.7 and then declined to 5-15% of peak values at the end of the study period in 4 infants born after a period of labour but to only 54 and 71% in 2 infants born without labour. FM levels showed a wide range which was not correlated with body weight, eg: on week 1, 0.06-0.20 and on week 24, 0.15-0.72. progression over this period was essentially linear. The ratio (mean (SD)) of 11-oxo/11-hydroxy metabolites decreased from 10.0 (8.2) to 2.3 (0.4) in the same period, p = < 0.10, while that of 20-oxo/20-hydroxy metabolites increased from 0.18 (0.07) to 1.08 (0.42), p = < 0.04. The ratio of metabolites with 5 oxygen functions relative to 6 increased from 0.38 (0.16) to 1.36 (0.43), p = < 0.04. Excretion of 5 alpha-tetrahydrocortisol began to rise at 44-47 wk post conception, but, unexpectedly, that of the 5 beta epimer began to rise sooner, at 39-41 wk, reaching a peak at 44-51 wk and then declining. The ratio of 5 beta/5 alpha epimers was 11.71 (11.1) at the peak and 1.14 (0.87) at 24 weeks, p = < 0.07. We conclude that, using a collection method which is reliable, non-stressful and repeatable at frequent intervals, new information on the evolution of steroid secretion and metabolism postpartum is emerging.
Authors:
N Taylor; S Sharma; F Giffin; S Naik; A Greenough
Related Documents :
23056826 - Comparison of two phototherapy methods (prophylactic vs therapeutic) for management of ...
8683766 - The natural history of nephrocalcinosis in premature infants treated with loop diuretics.
12710656 - Urinary effects of morphine in preterm infants.
2332006 - Influence of intrauterine growth retardation on parameters of liver function in low bir...
2051466 - Postnatal growth and skeletal maturation of experimental preterm macaques (macaca nemes...
21148656 - Early childhood general anaesthesia exposure and neurocognitive development.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Endocrine research     Volume:  22     ISSN:  0743-5800     ISO Abbreviation:  Endocr. Res.     Publication Date:  1996 Nov 
Date Detail:
Created Date:  1997-03-13     Completed Date:  1997-03-13     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8408548     Medline TA:  Endocr Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  741-9     Citation Subset:  IM    
Affiliation:
Department of Clinical Chemistry, King's College School of Medicine, London, UK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adrenal Cortex Hormones / urine*
Aging*
Chromatography, Gas
Female
Gestational Age
Humans
Hydrocortisone / urine
Infant, Newborn
Infant, Premature / urine*
Labor, Obstetric / physiology
Pregnancy
Sulfates / urine
Chemical
Reg. No./Substance:
0/Adrenal Cortex Hormones; 0/Sulfates; 50-23-7/Hydrocortisone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Nonclassical adrenal hyperplasia due to 21-hydroxylase-deficiency: does genotyping predict the clini...
Next Document:  Sex differences in the human metabolism of cortisol.