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CNS Neurosci Ther ; 25(2): 200-214, 2019 02.
Article in English | MEDLINE | ID: mdl-29962076

ABSTRACT

BACKGROUND: Treatments immediately after spinal cord injury (SCI) are anticipated to decrease neuronal death, disruption of neuronal connections, demyelination, and inflammation, and to improve repair and functional recovery. Currently, little can be done to modify the acute phase, which extends to the first 48 hours post-injury. Efforts to intervene have focused on the subsequent phases - secondary (days to weeks) and chronic (months to years) - to both promote healing, prevent further damage, and support patients suffering from SCI. METHODS: We used a contusion model of SCI in female mice, and delivered a small molecule reagent during the early phase of injury. Histological and behavioral outcomes were assessed and compared. RESULTS: We find that the reagent Pifithrin-µ (PFT-µ) acts early and directly on microglia in vitro, attenuating their activation. When administered during the acute phase of SCI, PFT-µ resulted in reduced lesion size during the initial inflammatory phase, and reduced the numbers of pro-inflammatory microglia and macrophages. Treatment with PFT-µ during the early stage of injury maintained a stable anti-inflammatory environment. CONCLUSIONS: Our results indicate that a small molecule reagent PFT-µ has sustained immunomodulatory effects following a single dose after injury.


Subject(s)
Macrophage Activation/drug effects , Neuroprotective Agents/therapeutic use , Spinal Cord Injuries/drug therapy , Sulfonamides/therapeutic use , Animals , Animals, Newborn , Behavior, Animal , Contusions/drug therapy , Female , Inflammation/drug therapy , Inflammation/pathology , Mice , Mice, Inbred C57BL , Microglia/drug effects , Neuroprotective Agents/administration & dosage , Phagocytosis/drug effects , Primary Cell Culture , Recovery of Function , Subcellular Fractions/drug effects , Subcellular Fractions/metabolism , Sulfonamides/administration & dosage , Wound Healing/drug effects
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