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Time-Dependent Microglia and Macrophages Response After Traumatic Spinal Cord Injury in Rat: A Systematic Review Publisher Pubmed



Rezvan M1, 2 ; Meknatkhah S3 ; Hassannejad Z4 ; Sharifalhoseini M2 ; Zadegan SA2 ; Shokraneh F5 ; Vaccaro AR6 ; Lu Y7 ; Rahimimovaghar V2
Authors

Source: Injury Published:2020


Abstract

Objective: To acquire evidence-based knowledge in temporal and spatial patterns of microglia/macrophages changes to facilitate finding proper intervention time for functional restoration after traumatic spinal cord injury (TSCI). Setting: Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran. Methods: We searched PubMed and EMBASE via Ovid SP with no temporal and linguistic restrictions. Besides, hand-search was performed in the bibliographies of relevant studies. The experimental non-interventional and non-transgenic animal studies confined to the rat species which assess the pathological change of microglia /macrophages at the specified time were included. Results: We found 15,315 non-duplicate studies. Screening through title and abstract narrowed down to 607 relevant articles, 31 of them were selected based on the inclusion criteria. The reactivity of the microglia/macrophages initiates in early hours PI in contusion, compression and transection models. Cells activity reached a maximum within 48 h to 28 days in compression, 7 days in contusion and between 4 and 60 days in transection models. Inflammatory response occurred at the epicenter, in or near the lesion site in both gray and white matter in all three injury models with a maximum extension of one centimeter caudal and rostral to the epicenter in the gray matter in contusion and transection models. Conclusion: This study was designed to study spatial-temporal changes in the activation of microglia/macrophages overtime after TSCI. We were able to demonstrate time-dependent cell morphological changes after TSCI. The peak times of cell reactivity and the areas where the cells responded to the injury were determined. © 2020
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