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MicroRNAs control eyelid development through regulating Wnt signaling
Author(s) -
Nagai Takahiro,
Trakanant Supaluk,
Kawasaki Maiko,
Kawasaki Katsushige,
Yamada Yurie,
Watanabe Momoko,
Blackburn James,
OtsukaTanaka Yoko,
Hishinuma Mitsue,
Kitatmura Atsushi,
Meguro Fumiya,
Yamada Akane,
Kodama Yasumitsu,
Maeda Takeyasu,
Zhou Qiliang,
Saijo Yasuo,
Yasue Akihiro,
Sharpe Paul T.,
Hindges Robert,
Takagi Ritsuo,
Ohazama Atsushi
Publication year - 2019
Publication title -
developmental dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.634
H-Index - 141
eISSN - 1097-0177
pISSN - 1058-8388
DOI - 10.1002/dvdy.10
Subject(s) - dicer , biology , wnt signaling pathway , microbiology and biotechnology , microrna , fibroblast growth factor , phenotype , genetics , ribonuclease iii , signal transduction , gene , rna interference , receptor , rna
Background: The timing, location, and level of gene expression are crucial for normal organ development, because morphogenesis requires strict genetic control. MicroRNAs (miRNAs) are noncoding small single‐stranded RNAs that play a critical role in regulating gene expression level. Although miRNAs are known to be involved in many biological events, the role of miRNAs in organogenesis is not fully understood. Mammalian eyelids fuse and separate during development and growth. In mice, failure of this process results in the eye‐open at birth (EOB) phenotype. Results: It has been shown that conditional deletion of mesenchymal Dicer (an essential protein for miRNA processing; Dicer fl / fl ; Wnt1Cre ) leads to the EOB phenotype with full penetrance. Here, we identified that the up‐regulation of Wnt signaling resulted in the EOB phenotype in Dicer mutants. Down‐regulation of Fgf signaling observed in Dicer mutants was caused by an inverse relationship between Fgf and Wnt signaling. Shh and Bmp signaling were down‐regulated as the secondary effects in Dicer fl / fl ; Wnt1Cre mice. Wnt, Shh, and Fgf signaling were also found to mediate the epithelial–mesenchymal interactions in eyelid development. Conclusions: miRNAs control eyelid development through Wnt. Developmental Dynamics 248:201‐210, 2019. © 2019 Wiley Periodicals, Inc.