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Whole-mount Immunohistochemical Analysis for Embryonic Limb Skin Vasculature: a Model System to Study Vascular Branching Morphogenesis in Embryo
Published on: May 20, 2011
Abnormal venous and arterial patterning in Chordin mutants.
Emmanuèle C Délot1, Natalya Shneyder, Hanwei Zhang
1Department of Pediatrics, University of California at Los Angeles, Los Angeles, California, USA.
Summary
Researchers developed a new resin injection technique to visualize the venous system in mouse embryos. This method revealed novel venous anomalies in Chordin-deficient mice, highlighting the Bone Morphogenetic Protein pathway's role in venous development.
Area of Science:
- Developmental Biology
- Cardiovascular Science
- Genetics
Background:
- Traditional dye injection methods primarily visualize the arterial tree due to reliance on the beating heart.
- Understanding venous system development is crucial but has been limited by existing imaging techniques.
Purpose of the Study:
- To develop an improved method for imaging the embryonic venous system.
- To investigate venous anomalies in Chordin (Chrd) deficient mouse models.
Main Methods:
- A novel technique involving injection of pigmented methylsalicylate resins into fixed and cleared mouse embryos.
- Analysis of cardiovascular development, particularly the venous system, in wild-type and Chrd-/- mutant embryos.
Main Results:
- The new resin injection technique successfully imaged the venous system, revealing previously unseen details.
- Multiple venous anomalies were discovered in Chrd-/- mutants, including defects in anterior cardinal veins and their tributaries.
- Chordin deficiency, an inhibitor of Bone Morphogenetic Protein (BMP) signaling, led to severe aortic arch phenotypes and persistent truncus arteriosus.
Conclusions:
- The developed resin injection method provides unprecedented detail of the embryonic venous system.
- The Bone Morphogenetic Protein (BMP) signaling pathway, regulated by Chordin, is essential for normal venous development.
- Chordin deficiency causes significant cardiovascular defects, including venous patterning abnormalities and persistent truncus arteriosus.
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