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形态发生运动

形态发生运动. 从受精卵到成体,动物形态的变化是如何完成的?. ?. 原肠运动. 这个最根本的形态发生运动使胚胎细胞重新排列, 形成了三个胚层:外胚层,中胚层和内胚层. 爪蛙早期卵裂. 爪蛙原肠运动过程. 原肠作用过程中的细胞运动. 下包 内卷 粘连 迁移 集中 延伸. 斑马鱼早期发育. 爪蛙原肠作用:早期 - 后期. 背唇. 下包和内卷. 粘连和迁移. 形成伪足,与细胞外基质结合,运动. 集中和延伸运动. 侧部细胞向背部集中 背部细胞在前后轴方向延伸. Mesoderm. Endoderm. Ectoderm. 集中和延伸运动演示.

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形态发生运动

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  1. 形态发生运动

  2. 从受精卵到成体,动物形态的变化是如何完成的?从受精卵到成体,动物形态的变化是如何完成的? ?

  3. 原肠运动 这个最根本的形态发生运动使胚胎细胞重新排列, 形成了三个胚层:外胚层,中胚层和内胚层

  4. 爪蛙早期卵裂

  5. 爪蛙原肠运动过程

  6. 原肠作用过程中的细胞运动 下包 内卷 粘连 迁移 集中 延伸

  7. 斑马鱼早期发育

  8. 爪蛙原肠作用:早期-后期 背唇

  9. 下包和内卷

  10. 粘连和迁移 形成伪足,与细胞外基质结合,运动

  11. 集中和延伸运动 侧部细胞向背部集中 背部细胞在前后轴方向延伸 Mesoderm Endoderm Ectoderm

  12. 集中和延伸运动演示

  13. 其它脊椎动物的原肠作用 概念:背唇(爪蛙),胚盾(斑马鱼),原结(人,鸟类) 边缘区(爪蛙),边缘区(斑马鱼),原条(人,鸟类)

  14. 人胚胎的原肠作用

  15. 原肠作用的细胞和分子基础 细胞粘连和迁移的细胞分子基础 集中和延伸运动的细胞和分子基础

  16. 细胞粘连和迁移的细胞分子基础 细胞与细胞外基质的相互作用

  17. 整连蛋白介导细胞与细胞外基质的交流

  18. One important function of integrins on cells in tissue culture is their role in cell migration. Cells adhere to a substrate through their integrins. During movement, the cell makes new attachments to the substrate at its front and concurrently releases those at its rear. When released from the substrate, integrin molecules are taken back into the cell by endocytosis; they are transported through the cell to its front by the endocytic cycle where they are added back to the surface. In this way they are cycled for reuse, enabling the cell to make fresh attachments at its leading front.

  19. 抑制整连蛋白与细胞外基质的相互作用 阻止原肠运动过程中的细胞迁移

  20. 细胞运动异常导致先天性缺陷

  21. Dorsal Convergence Extension and Involution Ventral 集中和延伸运动的细胞基础 侧向嵌入(Medio-lateral intercalation)

  22. Non-canonical Wnt/ß-catenin pathway Wnt/ß-catenin pathway Wnt1, Wnt3A, Wnt8, Wnt8b Wnt11 Frizzled Frizzled Dsh Dsh GSK3ß/Axin/APC RhoA/Rac/Cdc42 ß-catenin JNK cascade ß-catenin/Tcf Transcription of target genes Cytoskeltal organization Axis specification Cell polarity/convergence and extension 集中和延伸运动的分子基础 非经典的Wnt信号通路调节细胞和组织的极性

  23. Tissue and segmental polarity in Drosophila Formation of embryonic axis and asymmetric movements in vertebrates Axis specificatioin (canonical Wnt signaling) Convergent extension/axis elongation (PCP signaling)

  24. 非经典的Wnt信号通路调节细胞极向但不影响细胞命运非经典的Wnt信号通路调节细胞极向但不影响细胞命运 正常胚胎 抑制PCP通路

  25. 非经典的Wnt信号通路如何调节细胞极向? 在细胞内极向分布:

  26. 非经典的Wnt信号通路调节不同发育过程的集中延伸运动非经典的Wnt信号通路调节不同发育过程的集中延伸运动 1)原肠运动 2)神经管闭合 3)神经突出的向导和延伸

  27. 集中延伸运动异常导致先天性缺陷

  28. 研究调节细胞运动的细胞和分子途径 能为人类疾病的致病机理提供信息

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