Document Detail

Maturation-dependent vulnerability of perinatal white matter in premature birth.
MedLine Citation:
PMID:  17261726     Owner:  NLM     Status:  MEDLINE    
Survivors of premature birth have a predilection for perinatal brain injury, especially to periventricular cerebral white matter. Periventricular white matter injury (PWMI) is now the most common cause of brain injury in preterm infants and the leading cause of chronic neurological morbidity. The spectrum of chronic PWMI includes focal cystic necrotic lesions (periventricular leukomalacia) and diffuse myelination disturbances. Recent neuroimaging studies support that the incidence of periventricular leukomalacia is declining, whereas focal or diffuse noncystic injury is emerging as the predominant lesion. In a significant number of infants, PWMI appears to be initiated by perturbations in cerebral blood flow that reflect anatomic and physiological immaturity of the vasculature. Ischemic cerebral white matter is susceptible to pronounced free radical-mediated injury that particularly targets immature stages of the oligodendrocyte lineage. Emerging experimental data supports that pronounced ischemia in the periventricular white matter is necessary but not sufficient to generate the initial injury that leads to PWMI. The developmental predilection for PWMI to occur during prematurity appears to be related to both the timing of appearance and regional distribution of susceptible oligodendrocyte progenitors. Injury to oligodendrocyte progenitors may contribute to the pathogenesis of PWMI by disrupting the maturation of myelin-forming oligodendrocytes. There has been substantial recent progress in the understanding of the cellular and molecular pathogenesis of PWMI. The oligodendrocyte progenitor is a key target for preventive strategies to reduce ischemic cerebral white matter injury in premature infants.
Stephen A Back; Art Riddle; Melissa M McClure
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Stroke; a journal of cerebral circulation     Volume:  38     ISSN:  1524-4628     ISO Abbreviation:  Stroke     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-01-30     Completed Date:  2007-04-05     Revised Date:  2007-12-03    
Medline Journal Info:
Nlm Unique ID:  0235266     Medline TA:  Stroke     Country:  United States    
Other Details:
Languages:  eng     Pagination:  724-30     Citation Subset:  IM    
Department of Pediatrics, Oregon Health & Science University, Portland, OR 97239-3098, USA.
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MeSH Terms
Brain Injuries / diagnosis,  pathology*
Infant, Newborn
Infant, Premature
Myelin Sheath / pathology*
Premature Birth / diagnosis,  pathology*
Grant Support

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

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