Novel Rest functions revealed by conditional gene ablation

被引:5
作者
Aoki, Hitomi [1 ]
机构
[1] Gifu Univ, Grad Sch Med, Dept Tissue & Organ Dev, Regenerat & Adv Med Sci, 1-1 Yanagido, Gifu 5011194, Japan
关键词
Rest/Nrsf; Neural differentiation; Conditional gene ablation; Neural crest cell; Neural stem cell; Vagus nerve; RESTRICTIVE SILENCER FACTOR; EMBRYONIC STEM-CELLS; TARGET GENES; TUMOR-SUPPRESSOR; NEURONAL GENES; DOWN-SYNDROME; IN-VIVO; DIFFERENTIATION; LENS; REPRESSOR;
D O I
10.1007/s00795-018-0187-x
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Rest is a regulator of neuronal development and has been suggested to function in maintaining the pluripotent state of embryonic stem cells (ESCs); however, this remains controversial. Since Rest null mice show embryonic lethality, we herein generated conditional Rest knockout (CKO) models to investigate Rest functions in more detail. Our results revealed that Rest was not necessary for maintaining the pluripotency of ESCs and instead promoted primitive endoderm differentiation. In contrast to the repressive role of Rest in vitro, including ESCs, neural stem cells, and fibroblasts, on the expression of target neural genes, Rest CKO did not affect the in vivo development of brain tissue. However, the same Rest CKO mice showed an abnormal lens morphology after birth with augmented Notch signaling and down-regulated lens fiber regulator gene expression. The ablation of Rest during neural crest cell (NCC) development caused neonatal lethality due to swelling of the digestive tract with reductions in acetylcholinesterase activity in the myenteric plexus derived from NCCs. Furthermore, a reduced number of melanocyte precursors also derived from NCCs resulted in white spotted coat color phenotypes lacking mature melanocytes. Rest controls thousands of target genes and may have many unknown functions related to diseases.
引用
收藏
页码:129 / 138
页数:10
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