The morphogen Hedgehog is essential for proper adult morphogenesis in Bombyx mori
文献类型: 外文期刊
第一作者: Chen, Kai
作者: Chen, Kai;Yu, Ye;Zhang, Zhongjie;Hu, Bo;Liu, Xiaojing;Tan, Anjiang;Chen, Kai;Yu, Ye;Zhang, Zhongjie;Hu, Bo;Liu, Xiaojing;Tan, Anjiang
作者机构:
关键词: Morphogen; Hedgehog; CRISPR; Cas9; Gal4; UAS; Bombyx mori
期刊名称:INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY ( 影响因子:3.8; 五年影响因子:4.4 )
ISSN: 0965-1748
年卷期: 2023 年 153 卷
页码:
收录情况: SCI
摘要: The well-known morphogen Hedgehog (Hh) is indispensable for embryo patterning and organ development from invertebrates to vertebrates. The role of Hh signaling pathway has been extensively investigated in the model organism Drosophila melanogaster, whereas its biological functions are still poorly understood in non-drosophilid insects. In the current study, we describe comprehensive investigation of Hh biological roles in the model lepidopteran insect Bombyx mori by using both CRISPR/Cas9-mediated gene ablation and Gal4/UAS-mediated ectopic expression. Direct injection of Cas9 protein and Hh-specific sgRNAs into preblastoderm embryos induced complete lethality. In contrast, Hh mutants obtained by the binary transgenic CRISPR/Cas9 system showed no deleterious phenotypes during embryonic and larval stages. However, mutants showed abnormalities from the pupal stage and most of adult body appendages exhibited severe developmental defects. Molecular analysis focused on wing development reveal that Hh signaling, Imd signaling and Wnt signaling pathways were distorted in Hh mutant wings. Ectopic expression by using the binary Gal4/UAS system induce early larval lethality. On contrary, moderate overexpression of Hh by using a unitary transgenic system resulted in severe defects in adult leg and antenna development. Our data directly provide genetic evidence that Hh plays vital roles in imaginal discs development and proper adult morphogenesis in B. mori.
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