期刊
DEVELOPMENT
卷 146, 期 20, 页码 -出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.175729
关键词
miR-19b; Wnt7b; Chick; Forebrain; Hippocampus; Hem
资金
- Science and Engineering Research Board, Department of Science and Technology, Government of India [EMR/2016/000886]
- Council of Scientific and Industrial Research, Government of India [09/092(0824)/2011-EMR-I]
- Ministry of Human Resources and Development, Government of India
The functions of the hippocampus are conserved between birds and mammals; however, it is not known whether similar mechanisms are responsible for its development in these two classes. In mammals, hippocampus development is known to be regulated by the hem organizer. Here, we have identified that, in birds, Wnt7b secreted from the hem is sufficient for inducing the expression of hippocampal markers. Furthermore, we have demonstrated that a microRNA, miR-19b, which is selectively excluded from the hem region, is necessary and sufficient for restricting the expression of Wnt7b to the hem. This study suggests that the role of the Wnt signal emanating from the hem is conserved between birds and mammals, and that a microRNA-based mechanism is crucial for determining the position of the hippocampus.
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