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2015 ; 400
(1
): 139-47
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Region-specific regulation of cell proliferation by FGF receptor signaling during
the Wolffian duct development
#MMPMID25678108
Okazawa M
; Murashima A
; Harada M
; Nakagata N
; Noguchi M
; Morimoto M
; Kimura T
; Ornitz DM
; Yamada G
Dev Biol
2015[Apr]; 400
(1
): 139-47
PMID25678108
show ga
The Wolffian duct (WD) is a primordium of the male reproductive tract and kidney
collecting duct system. Fibroblast growth factor receptors (FGFRs), members of
the receptor tyrosine kinase (RTK) family, are essential for kidney development.
Although the functions of FGFR signaling in kidney morphogenesis have been
analyzed, their function in WD development has not been comprehensively
investigated. Here, we demonstrate that Fgfr2 is the major Fgfr gene expressed
throughout the WD epithelia and that it is essential for the maintenance of the
WD, specifically in the caudal part of the WD. Hoxb7-Cre mediated inactivation of
Fgfr2 in the mouse WD epithelia resulted in the regression of the caudal part of
the WD and abnormal male reproductive tract development. Cell proliferation and
expression of the downstream target genes of RTK signaling (Etv4 and Etv5) were
decreased in the caudal part of the WD epithelia in the mutant embryos. Cranial
(rostral) WD formation and ureteric budding were not affected. Ret, Etv4, and
Etv5 expression were sustained in the ureteric bud of the mutant embryos. Taken
together, these data suggest region-specific requirements for FGFR2 signaling in
the developing caudal WD epithelia.