The left-right Pitx2 pathway drives organ-specific arterial and lymphatic development in the intestine.

The left-right Pitx2 pathway drives organ-specific arterial and lymphatic development in the intestine.
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DOI:
10.1016/j.devcel.2014.11.002
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发表时间:
2014-12-22
期刊:
影响因子:
11.8
通讯作者:
Kurpios, Natasza A.
Kurpios, Natasza A.
中科院分区:
生物学1区
文献类型:
--
作者:
Mahadevan, Aparna;Welsh, Ian C.;Sivakumar, Aravind;Gludish, David W.;Shilvock, Abigail R.;Noden, Drew M.;Huss, David;Lansford, Rusty;Kurpios, Natasza A.

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背侧肠系膜(DM)是肠道血管和淋巴管的主要管道。它们的形态发生的潜在机制是具有挑战性的研究,目前仍不清楚。在这里,我们证明了糖尿病的动脉形成始于肠道旋转,严格地在左侧进行,依赖于Pitx2靶基因CXCL12。尽管右侧可见CXCR4阳性的血管母细胞,但它们不能形成血管并逐渐迁移。令人惊讶的是,肠道淋巴管也起源于左侧糖尿病,只有在动脉生成之后才出现,并依赖于动脉生成,这意味着动脉是肠道淋巴管生成的驱动因素。我们的数据开始揭开两个不同血管系统的起源,并展示早期L-R分子不对称是如何转化为器官特有的血管模式的。我们提出了肠道淋巴管生成的双重起源,其中需要在动脉生长之前启动局部淋巴管,而局部淋巴管只会随后连接到血管系统。
The dorsal mesentery (DM) is the major conduit for blood and lymphatic vessels in the gut. The mechanisms underlying their morphogenesis are challenging to study and remain unknown. Here we show that arteriogenesis in the DM begins during gut rotation and proceeds strictly on the left side, dependent on the Pitx2 target gene Cxcl12. Although competent Cxcr4-positive angioblasts are present on the right, they fail to form vessels and progressively emigrate. Surprisingly, gut lymphatics also initiate in the left DM and arise only after – and dependent on – arteriogenesis, implicating arteries as drivers of gut lymphangiogenesis. Our data begin to unravel the origin of two distinct vascular systems and demonstrate how early L-R molecular asymmetries are translated into organ-specific vascular patterns. We propose a dual origin of gut lymphangiogenesis, where prior arterial growth is required to initiate local lymphatics that only subsequently connect to the vascular system.
在哺乳动物组织形态发生中,细胞嵌入产生的力牵引表皮片。
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影响因子: 11.8
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