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Amino Acid and Acylcarnitine Profiles in Premature Neonates: A Pilot Study.
MedLine Citation:
PMID:  23404695     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To investigate the longitudinal changes in amino acid (AA) and acylcarnitine (AC) profiles of preterm neonates over the first 2 wk of life, and to detect any significant deviation from full term values that requires change of cut-off values used for detection of metabolic disorders in preterm neonates. METHODS: This observational analytical longitudinal study was conducted on 131 premature neonates (gestational age ranged from 27 to 36 wk) and 143 healthy full-term neonates. Dried blood spots were taken on the 5th and 14th postnatal day from the premature neonates and on day 5 from full term neonates for neonatal screening. Samples were analyzed for AA and AC using tandem mass spectrometer. RESULTS: Most AA significantly decreased on day 14 compared to day 5 among preterm neonates (p < 0.05). The combined values of total carnitine (TC), total acylcarnitine (tAC) and short-chain acylcarnitines on day 5 among preterm neonates were statistically significantly higher compared to the day 14 sample (p 0.0001), whereas no statistically significant difference was found regarding the values of medium-, long-chain acylcarnitines, tAC/FC, and FC/TC (p > 0.05). The levels of AA of preterm neonates were statistically significantly higher than that of the controls (p < 0.05). The values of TC, tAC, short-, medium- and long-chain acylcarnitines, were significantly higher than those of the controls (p < 0.05). The reference ranges for preterm neonates were determined using the 1st and 99.9th percentiles. CONCLUSIONS: AA and AC showed an age-related distribution of their concentrations. This underlines the importance of using appropriate reference values when working with a prematurely born population.
Iman Mandour; Dina El Gayar; Maha Amin; Tarek Mohamed Farid; Aliaa Adel Ali
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-2-13
Journal Detail:
Title:  Indian journal of pediatrics     Volume:  -     ISSN:  0973-7693     ISO Abbreviation:  Indian J Pediatr     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2013-2-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0417442     Medline TA:  Indian J Pediatr     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Clinical and Chemical Pathology, Faculty of Medicine, Cairo University, Cairo, Giza, Egypt.
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