Publications

Dernière publication 01/11/2012

Postnatal administration of IL-1Ra exerts neuroprotective effects following peri

New therapeutic strategies are needed to protect neonates, especially premature newborns, against brain injury and associated neurobehavioral...

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    [title] => Postnatal administration of IL-1Ra exerts neuroprotective effects following peri
    [paragraph] => Postnatal administration of IL-1Ra exerts neuroprotective effects following perinatal inflammation and/or hypoxic-ischemic injuries
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Authors
Sylvie Girard, Hugues Sébire, Marie-Elsa Brochu, Sinziana Briota, Philippe Sarret, Guillaume Sébire

 Lab
Sherbrooke University, Quebec, Canada
Journal
Brain, Behavior, and Immunity
Abstract
New therapeutic strategies are needed to protect neonates, especially premature newborns, against brain injury and associated neurobehavioral deficits. The role of pro-inflammatory cytokines, especially IL-1?, in the pathophysiological pathway leading to neonatal brain damage is increasingly recognized and represents an attractive therapeutic target. We investigated the therapeutic potential of postnatal systemic administration of the interleukin (IL)-1 receptor antagonist (IL-1Ra) in an animal model of perinatal brain injury using the insults most common to human neonates, i.e. prenatal exposure to inflammation and/or postnatal hypoxia-ischaemia (HI). We found that postnatal administration of IL-1Ra preserved motor function and exploratory behavior after either prenatal exposure to inflammatory agent lipopolysaccharide (LPS) or postnatal HI insult. The deleterious effect of combined prenatal LPS and postnatal HI on brain development was also alleviated by administration of IL-1Ra, as seen by the protected neural stem cell population, prevention of myelin loss in the internal capsule, decreased gliosis, and decreased neurobehavioral impairment. This study showed the distinct pattern of functional deficits induced by prenatal inflammation as compared to postnatal HI and the therapeutic potential of IL-1Ra administration against neonatal brain injury. Furthermore, our results highlight the potential for postnatal treatment of prenatal inflammatory stressors.

Highlight:
Using a rat model of perinatal brain injury, we showed that postnatal IL-1Ra, anti-inflammatory treatment, was protective against behavioral deficits and brain injury.

Keywords: Inflammation; IL-1; Behavior; Development; Brain damage
BIOSEB Instruments Used
Grip strength test (BIO-GS3)
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Une méthode simple pour quantifier objectivement la force musculaire des rats et souris et l'effet de drogues, toxines, maladies musculaires (ex: myopathie) et neurodégénératives. Cette mesure de force est souvent employée en association avec le test de coordination motrice ROTAROD: un sujet présentant une coordination normale montrera des résultats médiocres en cas de faible force musculaire. Un must pour vos recherches sur l'activité, la coordination et le contrôle musculaire: particulièrement utile pour vos études sur les maladies de Parkinson et Huntington.
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