西亚试剂：Acute Inflammation Initiates the Regenerative Response in t

Acute Inflammation Initiates the Regenerative Response in the Adult Zebrafish Brain

Nikos Kyritsis, Caghan Kizil, Sara Zocher, Volker Kroehne, Jan Kaslin, Dorian Freudenreich, Anne Iltzsche, Michael Brand

The zebrafish regenerates its brain after injury and hence is a useful model organism to study the mechanisms enabling regenerative neurogenesis, which is poorly manifested in mammals. Yet, the signaling mechanisms initiating such a regenerative response in fish are unknown. Using cerebroventricular microinjection of immunogenic particles and immunosuppression assays, we show that inflammation is required and sufficient for enhancing the proliferation of neural progenitors and subsequent neurogenesis by activating injury-induced molecular programs that can be observed after traumatic brain injury. We also identified the cysteinyl leukotriene signaling as an essential component of inflammation on the regenerative process of the adult zebrafish brain. Thus, our results demonstrate that in zebrafish—in contrast to mammals—inflammation is a positive regulator of neuronal regeneration in the central nervous system.

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