| 1. | Tcdd influence the activity of diverse hormones , hormone receptors , mitogens , and other biological response modifiers and these interactions undoubtedly play an important role in the toxicity of these response . retinoic acid ( ra ) is ramification of vitamin a , having extensive biological effect on controlling conformation genesis , proliferation , differentiation , growth , metabolism of kinds of tissues and cells and stabilization of internal environment
第一部分igfs家族成分在维甲酸诱导马蹄内翻足畸形中的调控机制目的：维甲酸( retinoicacid ， ra )类物质是维生素a的衍生物，在调控多种组织和细胞的形态发生、增殖分化、生长发育、代谢及维持内环境的稳定等方面具有广泛的生物学活性。 |
