Platelets mediate protective neuroinflammation and promote neuronal plasticity at the site of neuronal injury
Publication in refereed journal


摘要It is generally accepted that inflammation within the CNS contributes to neurodegeneration after traumatic brain injury (TBI), but it is not clear how inflammation is initiated in the absence of infection and whether this neuroinflammation is predominantly beneficial or detrimental. We have previously found that brain-enriched glycosphingolipids within neuronal lipid rafts (NLR) induced platelet degranulation and secretion of neurotransmitters and pro-inflammatory factors. In the present study, we compared TBI-induced inflammation and neurodegeneration in wild-type vs. St3gal5 deficient (ST3−/−) mice that lack major CNS-specific glycosphingolipids. After TBI, microglial activation and CNS macrophage infiltration were substantially reduced in ST3−/− animals. However, ST3−/− mice had a larger area of CNS damage with marked neuronal/axonal loss. The interaction of platelets with NLR stimulated neurite growth, increased the number of PSD95-positive dendritic spines, and intensified neuronal activity. Adoptive transfer and blocking experiments provide further that platelet-derived serotonin and platelet activating factor plays a key role in the regulation of sterile neuroinflammation, hemorrhage and neuronal plasticity after TBI.
著者Marina Dukhinova, Inna Kuznetsova, Ekaterina Kopeykina, Ekaterina Veniaminova, Amanda W.Y. Yung, Tatyana Veremeyko, Kseniia Levchuk, Natasha S. Barteneva, Kenny Kam Wing Ho, Wing-Ho Yung, Julia Y.H. Liu, John Rudd, Sonata S.Y. Yau, Daniel C. Anthony, Tatyana Strekalova, Eugene D. Ponomarev
期刊名稱Brain, Behavior, and Immunity
出版社Elsevier Inc
頁次7 - 27
關鍵詞Neuronal plasticity, dendritic spines, serotonin, neuroinflammation, glycobiology, platelets, platelet-derived microparticles, traumatic brain injury, CNS repair

上次更新時間 2020-11-10 於 01:24