CARTILAGE, BONE AND TOOTH INDUCTION DURING EARLY EMBRYONIC MOUSE MANDIBULAR MORPHOGENESIS USING SERUMLESS, CHEMICALLY-DEFINED MEDIUM

被引:16
|
作者
SLAVKIN, HC
SASANO, Y
KIKUNAGA, S
BESSEM, C
BRINGAS, P
MAYO, M
LUO, W
MAK, G
RALL, L
SNEAD, ML
机构
[1] UNIV SO CALIF, SCH DENT, DEPT BASIC SCI, DEV BIOL LAB, LOS ANGELES, CA 90089 USA
[2] CHIRON CORP, EMERYVILLE, CA USA
关键词
Bone and tooth formation; Cartilage; DNA synthesis; In vitro culture; Mouse embryonic mandible; PreproEGF; Serumless medium;
D O I
10.3109/03008209009152421
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Studies were designed to test the hypothesis that plasma- and serum-deprived embryonic cells and tissues in vitro are capable of producing growth regulating factors which augment cartilage, bone and tooth induction during mouse mandibular process development. Embryonic mouse first branchial arch-derived mandibular processes (E11-E12, Theiler stages 18-19) or cap stage molar tooth (M1) organs (E15-E16, Theiler stage 23) expressed morphogenesis, histogenesis and cytodifferentiation (e. g., Meckel's cartilage and mandibular bone) when cultured as explants in permissive serumless and chemically-defined BGJB medium for periods up to 31 days in vitro. Organ cultures of early mandibular process explants in serumless conditions showed DNA synthesis comparable to the time- and position-restricted patterns characteristic for control in vivo development. As a paradigm for embryonic cell expression of putative growth factors, sense and antisense oligodeoxynucleotide probes corresponding to amino acids 1070-1081 for preproEGF, and antibodies directed against amino acids 348-691 of preproEGF, were used to identify and localize mRNA transcripts and translation products. Our preliminary evidence suggests that odontogenic epithelial and ectomesenchyme cells produce EGF-like products during instructive phases of tooth development. We suggest that plasma- and serum-deprived cells and tissues in vitro produce autocrine and/or paracrine growth factors which mediate embryonic mandibular morphogenesis, histogenesis and cytodifferentiation. © 1990 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.
引用
收藏
页码:41 / 51
页数:11
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