Hedgehog signaling is required for endomesodermal patterning and germ cell development in the sea anemone Nematostella vectensis.

Abstract:

:Two distinct mechanisms for primordial germ cell (PGC) specification are observed within Bilatera: early determination by maternal factors or late induction by zygotic cues. Here we investigate the molecular basis for PGC specification in Nematostella, a representative pre-bilaterian animal where PGCs arise as paired endomesodermal cell clusters during early development. We first present evidence that the putative PGCs delaminate from the endomesoderm upon feeding, migrate into the gonad primordia, and mature into germ cells. We then show that the PGC clusters arise at the interface between hedgehog1 and patched domains in the developing mesenteries and use gene knockdown, knockout and inhibitor experiments to demonstrate that Hh signaling is required for both PGC specification and general endomesodermal patterning. These results provide evidence that the Nematostella germline is specified by inductive signals rather than maternal factors, and support the existence of zygotically-induced PGCs in the eumetazoan common ancestor.

journal_name

Elife

journal_title

eLife

authors

Chen CY,McKinney SA,Ellington LR,Gibson MC

doi

10.7554/eLife.54573

subject

Has Abstract

pub_date

2020-09-24 00:00:00

issn

2050-084X

pii

54573

journal_volume

9

pub_type

杂志文章

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