Timing and duration of anti-alpha4beta1 integrin treatment after spinal cord injury: effect on therapeutic efficacy

Journal of Neurosurgery. Spine
Jennifer C FlemingLynne C Weaver

Abstract

After spinal cord injury (SCI) leukocytes infiltrate the injured cord, causing significant damage and further impairment of functional recovery. The leukocyte integrin alpha4beta1 is crucial for their entry. The authors previously demonstrated that an anti-alpha4 monoclonal antibody (mAb) treatment attenuates leukocyte infiltration, improves motor and autonomic function, and reduces neuropathic pain when administered at 2 hours and 24 hours after SCI. The authors conducted 2 preclinical studies: the first determined effects of treatment commencing at 6 hours, a clinically relevant time after injury, and the second examined effects of long-lasting treatment (28 days) on neurological recovery after SCI, as current clinically used anti-inflammatory monoclonal antibodies have such longevity. In the first study (timing study), rats were treated with anti-alpha4 or control mAb (intravenously) at 6 hours and 48 hours after moderate (35 g) thoracic compression SCI. Effects on intraspinal inflammation and oxidative injury were assessed at 3 and 7 days after SCI; motor function and pain were examined for 6 weeks. In the second study (duration study), anti-alpha4 mAb was administered starting 2 hours after SCI and subsequently every 3 day...Continue Reading

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