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http://dx.doi.org/10.5352/JLS.2004.14.3.375

Organ Induction by Combined Dose of bFGF and HGF in Animal Cap Assay of Early Xenopus laevis Embryos.  

진정효 (창원대학교 자연과학대학 생물학과)
윤춘식 (창원대학교 유전공학연구소)
이호선 (창원대학교 자연과학대학 생물학과)
박용욱 (창원대학교 자연과학대학 생물학과)
정선우 (창원대학교 자연과학대학 생물학과)
Publication Information
Journal of Life Science / v.14, no.3, 2004 , pp. 375-384 More about this Journal
Abstract
Fibroblast growth factors (FGFs) are known to induce multiple functions in early development, including mesoderm formation, gastrulation movement and antero-posterior patterning. The induction of mesoderm from Xenopus presumptive ectoderm and the combination effect on inducing organs of bFGF(basic FGF) and HGF (Hepatocyte Growth Factor) were studied. Explants were cultured in the combined solution for 3 days to normal embryo arrive at St. 43. These effects on combined dose were examined by histological experiment and by immunohistochemical method. The concentrations of growth factors were tested in 0, 0.5, 1, 10 and also tested in 50 ng/ml of bFGF, and 0, 1, 10, 50 and 100ng/ml of HGF respectively. The synergistic effects were seen in the combined-dose of bFGF and HGF rather than in single dose. Various organs were differentiated and highest inducing effects were seen at the combined concentration of 1 ng/ml of bFGF and 10ng/ml of HGF, and at the concentration 10ng/ml of bFGF and 1 ng/ml of HGF. The bFGF induces various organs from cultured animal cap explants and the effects are time and dose-dependent. HGF is also a potent mitogen for renal tubular cells and for mature hepatocytes in primary culture. Eyes were developed in high percentage at the combined concentration of 1 and 10ng/ml of bFGF, and 1 and 10 ng/ml of HGF. From the induced eye and normal embryonic eye, RPE65 was commonly detected by monoclonal antibodies 40All and 25F5 and the localization of RPE65 was seen by AP reaction.
Keywords
bFGF; HGF; Xenopus laevis; organ induction;
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