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Inflammatory-mediated model of cerebral palsy with developmental sequelae.

Abstract：

OBJECTIVE:Cerebral palsy (CP) is characterized by motor deficits. There is increasing evidence that CP may result from inflammatory and infection-mediated white matter damage. Our objective was to develop an inflammatory model for CP based on chronic lipopolysaccharide (LPS) exposure with a recognizable phenotype in offspring. STUDY DESIGN:On gestational days 15, 17, and 19 (approximately 28-36 wks human gestation; rat length of gestation is 21 days), pregnant rats were intracervically injected with 0.15 mg/kg LPS (in 0.1 mL saline) or 0.1 mL saline for controls. Neonatal tests for sensory-motor milestones were performed on postnatal days 1 to 21 (LPS n = 25; control n = 26). Adult males were tested at 8 weeks on open field and rotarod for motor activity. Immunohistochemistry studies were performed to assess olygodendrocyte (OL) damage. Statistical analysis included Mann-Whitney U and analysis of variance (ANOVA) with P < .05 considered significant. RESULTS:Immunohistochemistry revealed a decrease in the immature OL marker PLP on day 21 (P = .03) in LPS-exposed offspring, and an increase of the mature OL marker CNP on day 21 and at 8 weeks (P < .01, P < .001). LPS-exposed offspring were delayed achieving 3 motor milestones: negative geotaxis (P < .05), cliff aversion (P < .01), and surface righting (P = .05). They were also delayed in eye opening (P < .01). There was no difference between the 2 groups for the other tests. There was a trend towards decreased mean speed in LPS-exposed adults in open field testing (P = .08), but no differences observed in rotarod testing. CONCLUSION:Using an animal model for CP that mimics a chronic intrauterine inflammation that results in decreased levels of PLP, a marker for early oligodendrocytes consistent with white matter damage, we have demonstrated a phenotype relevant to the human CP manifestations in the neonatal period. Nevertheless, adult animals were able to compensate to the damage. Further refinement is needed to improve the understanding of pathogenesis, as well as allow for testing preventative therapies.

journal_name

Am J Obstet Gynecol

journal_title

American journal of obstetrics and gynecology

authors

Toso L,Poggi S,Park J,Einat H,Roberson R,Dunlap V,Woodard J,Abebe D,Spong CY

doi

10.1016/j.ajog.2005.05.072

subject

Has Abstract

pub_date

2005-09-01 00:00:00

pages

933-41

issue

3 Pt 2

eissn

0002-9378

issn

1097-6868

pii

S0002-9378(05)00769-6

journal_volume

193

pub_type

杂志文章

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