期刊
BIRTH DEFECTS RESEARCH PART C-EMBRYO TODAY-REVIEWS
卷 90, 期 2, 页码 133-154出版社
WILEY
DOI: 10.1002/bdrc.20180
关键词
palate; morphogenesis; orofacial; growth factors; signal transduction; epigenetics
资金
- Cleft Palate Foundation
- Kentucky Science and Engineering Foundation
- NIH, National Center for Research Resources [DE018215, HD053509, DA027466, P20 RR017702]
In the past, most scientists conducted their inquiries of nature via inductivism, the patient accumulation of pieces of information in the pious hope that the sum of the parts would clarify the whole. Increasingly, modern biology employs the tools of bioinformatics and systems biology in attempts to reveal the big picture. Most successful laboratories engaged in the pursuit of the secrets of embryonic development, particularly those whose research focus is craniofacial development, pursue a middle road where research efforts embrace, rather than abandon, what some have called the pedestrian qualities of inductivism, while increasingly employing modern data mining technologies. The secondary palate has provided an excellent paradigm that has enabled examination of a wide variety of developmental processes. Examination of cellular signal transduction, as it directs embryogenesis, has proven exceptionally revealing with regard to clarification of the facts of palatal ontogeny-at least the facts as we currently understand them. Herein, we review the most basic fundamentals of orofacial embryology and discuss how functioning of TGF beta, BMP, Shh, and Wnt signal transduction pathways contributes to palatal morphogenesis. Our current understanding of palate medial edge epithelial differentiation is also examined. We conclude with a discussion of how the rapidly expanding field of epigenetics, particularly regulation of gene expression by miRNAs and DNA methylation, is critical to control of cell and tissue differentiation, and how examination of these epigenetic processes has already begun to provide a better understanding of, and greater appreciation for, the complexities of palatal morphogenesis. Birth Defects Research (Part C) 90:133-154, 2010. (C) 2010 Wiley-Liss, Inc.
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