Document Detail

Association between neonatal iron overload and early human brain development in premature infants.
MedLine Citation:
PMID:  22349188     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Emerging evidence suggests that excess iron may be detrimental for brain development. However, little is known regarding the association between neonatal iron overload and subsequent neurodevelopment during infancy in vulnerable premature infants.
AIMS: To evaluate the association between neonatal iron overload and neurodevelopment in premature infants.
STUDY DESIGN: Prospective cohort study.
SUBJECTS: 24-32 weeks gestational age infants who had serum ferritin (SF) measured at 34-35 weeks post-menstrual age (PMA) and did not meet exclusion criteria: SF<76 ng/ml, toxoplasmosis, syphilis, rubella, cytomegalovirus, herpes infections, chromosomal disorders, or craniofacial anomalies were eligible. In addition, infants with sepsis or elevated C-reactive protein within 10 days before their SF measurement were excluded.
OUTCOME MEASURES: Infants were evaluated for neurodevelopmental outcome at 8-12 months of age and were deemed to have neurodevelopmental impairment if they had one or more of the following: mental developmental index<70, abnormal neurological examination, bilateral blindness, bilateral deafness, or required occupational, physical, or speech therapy.
RESULTS: 95 infants were studied. 70 had normal iron status (SF 76-400 ng/ml) while 25 were deemed to have iron overload (SF >400 ng/ml) at 34-35 weeks PMA. There was a marginal increase in neurodevelopmental impairment among infants with iron overload compared to infants with normal iron status (64% vs. 41%, p=0.05). However, after controlling for confounders, iron overload was not associated with neurodevelopmental impairment (Adjusted OR 0.71, 95% CI, 0.21-2.5).
CONCLUSION: Modest neonatal iron overload is not associated with neurodevelopmental impairment during infancy in premature infants.
Sanjiv B Amin; Gary Myers; Hongyue Wang
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2012-02-18
Journal Detail:
Title:  Early human development     Volume:  88     ISSN:  1872-6232     ISO Abbreviation:  Early Hum. Dev.     Publication Date:  2012 Aug 
Date Detail:
Created Date:  2012-07-09     Completed Date:  2013-06-19     Revised Date:  2013-08-14    
Medline Journal Info:
Nlm Unique ID:  7708381     Medline TA:  Early Hum Dev     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  583-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2011. Published by Elsevier Ireland Ltd.
Department of Pediatrics, Division of Neonatology, The University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Rochester, NY 14642, United States.
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MeSH Terms
Brain / growth & development,  physiopathology*
Developmental Disabilities / epidemiology
Ferritins / blood
Infant, Newborn
Infant, Premature
Infant, Premature, Diseases / epidemiology*
Iron Overload / epidemiology*
Neuropsychological Tests
Grant Support
Reg. No./Substance:

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