Epithelial Cell Lineage and Signaling in Murine Salivary Glands

被引:33
|
作者
Aure, M. H. [1 ,2 ]
Symonds, J. M. [1 ,3 ]
Mays, J. W. [2 ]
Hoffman, M. P. [1 ]
机构
[1] NIDCR, Matrix & Morphogenesis Sect, NIH, 30 Convent Dr,MSC 4370,Bldg 30,Rm 5A507, Bethesda, MD 20892 USA
[2] Natl Inst Dent & Craniofacial Res, Oral Immunobiol Unit, NIH, Bethesda, MD 20892 USA
[3] Chromodex Spherix Consulting, Rockville, MD USA
基金
美国国家卫生研究院;
关键词
lineage tracing; epithelial signaling; salivary gland development; regeneration; progenitor; submandibular gland; IRRADIATION-INDUCED HYPOSALIVATION; SUBMANDIBULAR-GLAND; MYOEPITHELIAL CELLS; PROGENITOR CELLS; DNA-REPAIR; STEM-CELLS; REGENERATION; EXPRESSION; ACINAR; DIFFERENTIATION;
D O I
10.1177/0022034519864592
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Maintaining salivary gland function is critical for oral health. Loss of saliva is a common side effect of therapeutic irradiation for head and neck cancer or autoimmune diseases such as Sjogren's syndrome. There is no curative treatment, and current strategies proposed for functional regeneration include gene therapy to reengineer surviving salivary gland tissue, cell-based transplant therapy, use of bioengineered glands, and development of drugs/biologics to stimulate in vivo regeneration or increase secretion. Understanding the genetic and cellular mechanisms required for development and homeostasis of adult glands is essential to the success of these proposed treatments. Recent advances in genetic lineage tracing provide insight into epithelial lineage relationships during murine salivary gland development. During early fetal gland development, epithelial cells expressing keratin 14 (K14) Sox2, Sox9, Sox10, and Trp63 give rise to all adult epithelium, but as development proceeds, lineage restriction occurs, resulting in separate lineages of myoepithelial, ductal, and acinar cells in postnatal glands. Several niche signals have been identified that regulate epithelial development and lineage restriction. Fibroblast growth factor signaling is essential for gland development, and other important factors that influence epithelial patterning and maturation include the Wnt, Hedgehog, retinoic acid, and Hippo signaling pathways. In addition, other cell types in the local microenvironment, such as endothelial and neuronal cells, can influence epithelial development. Emerging evidence also suggests that specific epithelial cells will respond to different types of salivary gland damage, depending on the cause and severity of damage and the resulting damaged microenvironment. Understanding how regeneration occurs and which cell types are affected, as well as which signaling factors drive cell lineage decisions, provides specific targets to manipulate cell fate and improve regeneration. Taken together, these recent advances in understanding cell lineages and the signaling factors that drive cell fate changes provide a guide to develop novel regenerative treatments.
引用
收藏
页码:1186 / 1194
页数:9
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