Title | The left-right Pitx2 pathway drives organ-specific arterial and lymphatic development in the intestine. |
Publication Type | Journal Article |
Year of Publication | 2014 |
Authors | Mahadevan A, Welsh IC, Sivakumar A, Gludish DW, Shilvock AR, Noden DM, Huss D, Lansford R, Kurpios NA |
Journal | Dev Cell |
Volume | 31 |
Issue | 6 |
Pagination | 690-706 |
Date Published | 2014 Dec 22 |
ISSN | 1878-1551 |
Keywords | Animals, Arteries, Body Patterning, Chemokine CXCL12, Chickens, Gene Expression Regulation, Developmental, Green Fluorescent Proteins, Homeodomain Proteins, Intestines, Lymphangiogenesis, Lymphatic System, Lymphatic Vessels, Mesentery, Mice, Mice, Transgenic, Microscopy, Fluorescence, Oligonucleotide Array Sequence Analysis, Quail, Receptors, CXCR4, Transcription Factors |
Abstract | 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 left-right molecular asymmetries are translated into organ-specific vascular patterns. We propose a dual origin of gut lymphangiogenesis in which prior arterial growth is required to initiate local lymphatics that only subsequently connect to the vascular system. |
DOI | 10.1016/j.devcel.2014.11.002 |
Alternate Journal | Dev. Cell |
PubMed ID | 25482882 |
PubMed Central ID | PMC4326534 |
Grant List | R01 DK092776 / DK / NIDDK NIH HHS / United States T32 GM007617 / GM / NIGMS NIH HHS / United States T32 HD057854 / HD / NICHD NIH HHS / United States HD057854 / HD / NICHD NIH HHS / United States |
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