TNF signaling and macrophages govern fin regeneration in zebrafish larvae

Mai Nguyen-Chi, Béryl Laplace-Builhé, Jana Travnickova, Patricia Luz-Crawford, Gautier Tejedor, Georges Lutfalla, Karima Kissa, Christian Jorgensen, Farida Djouad

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

74 Citas (Scopus)

Resumen

Macrophages are essential for appendage regeneration after amputation in regenerative species. The molecular mechanisms through which macrophages orchestrate blastema formation and regeneration are still unclear. Here, we use the genetically tractable and transparent zebrafish larvae to study the functions of polarized macrophage subsets during caudal fin regeneration. After caudal fin amputation, we show an early and transient accumulation of pro-inflammatory macrophages concomitant with the accumulation of non-inflammatory macrophages which, in contrast to pro-inflammatory macrophages, remain associated to the fin until the end of the regeneration. Chemical and genetic depletion of macrophages suggested that early recruited macrophages that express TNFα are critical for blastema formation. Combining parabiosis and morpholino knockdown strategies, we show that TNFα/TNFR1 signaling pathway is required for the fin regeneration. Our study reveals that TNFR1 has a necessary and direct role in blastema cell activation suggesting that macrophage subset balance provides the accurate TNFα signal to prime regeneration in zebrafish.

Idioma originalInglés
Páginas (desde-hasta)e2979
PublicaciónCell Death and Disease
Volumen8
N.º8
DOI
EstadoPublicada - 10 ago. 2017
Publicado de forma externa

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