Left-Right Patterning: Breaking Symmetry to Asymmetric Morphogenesis.

Left-Right Patterning: Breaking Symmetry to Asymmetric Morphogenesis.
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DOI:
10.1016/j.tig.2017.06.004
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发表时间:
2017-09
期刊:
Trends in genetics : TIG
影响因子:
--
通讯作者:
Burdine RD
Burdine RD
中科院分区:
其他
文献类型:
--
作者:
Grimes DT;Burdine RD

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脊椎动物在内部器官的结构和位置上表现出明显的左右(L-R)不对称。对称性被纤毛运动产生的不对称流体流动打破,导致信号级联- node - pitx2通路-仅在左侧中表皮组织中牢固建立。这一途径影响各种器官原基,指导它们的侧特异性发育。最近,在了解胚胎L-R对称性的破坏以及node - pitx2通路如何控制细胞的侧化分化、迁移和细胞行为的其他方面,以及驱动器官形成不对称的组织水平机制方面取得了进展。正确执行不对称器官发生对健康至关重要,因此进一步了解L-R的发展是一个重要的问题。
Vertebrates exhibit striking left-right (L-R) asymmetries in the structure and position of the internal organs. Symmetry is broken by motile cilia-generated asymmetric fluid flow, resulting in a signaling cascade — the Nodal-Pitx2 pathway — being robustly established within mesodermal tissue on the left side only. This pathway impinges upon various organ primordia to instruct their side-specific development. Recently, progress has been made in understanding both the breaking of embryonic L-R symmetry and how the Nodal-Pitx2 pathway controls lateralized cell differentiation, migration, and other aspects of cell behavior, as well as tissue-level mechanisms, that drive asymmetries in organ formation. Proper execution of asymmetric organogenesis is critical to health, making furthering our understanding of L-R development an important concern.
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