Deficient cell proliferation in palatal shelf mesenchyme of CL/Fr mouse embryos

被引:5
|
作者
Sasaki, Y
Tanaka, S
Hamachi, T
Taya, Y
机构
[1] Kyushu Univ, Fac Dent Sci, Div Oral Hlth Growth & Dev, Sect Pediat Dent,Higashi Ku, Fukuoka 8128582, Japan
[2] Kyushu Univ, Sch Dent, Fukuoka 812, Japan
[3] Nippon Dent Univ, Dept Pathol, Niigata, Japan
关键词
spontaneous cleft lip and palate; CL/Fr; palatal organ culture; bromodeoxyuridine (BrdU); palatal cell proliferation;
D O I
10.1177/154405910408301012
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
How secondary palate formation is affected in the cleft lip genotype remains poorly understood. The purpose of this study was to analyze regional patterns of cell proliferation in CL/Fr mouse embryos with or without cleft lip. Pairs of palatal shelves were dissected at E13.5 from CL/Fr normal embryos (CL/Fr-N), CL/Fr embryos with bilateral cleft lip (CL/Fr-BCL), and a control strain of C57BL embryos (C57BL). The explants were examined histologically after 48 hrs of organ culture. Cell kinetics for proliferation in the palatal shelves was examined at E13.5 by the bromodeoxyuridine method in vivo. The CL/Fr-BCL palates fused as well as the CL/Fr-N palates in vitro. There were inter-group differences in the absolute number of BrdU-positive cells and the ratio of positive/(positive+negative) cells in the palate's mesenchyme ( C57BL > CL/ Fr- N > CL/Fr-BCL) and epithelium ( C57BL > CL/ Fr- N = CL/Fr-BCL). These findings indicate that a cleft palate follows reduced cell proliferation of secondary palatal mesenchyme in CL/Fr mice.
引用
收藏
页码:797 / 801
页数:5
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