Angiogenesis: In Vitro Systems: 443 (Methods in Enzymology)

Angiogenesis: In Vitro Systems, Volume 443
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Diseases that are angiogensis-dependent result when blood vessels either grow excessively or insufficiently. Tried-and-tested techniques written by researchers that developed them, used them, and brought them to fruition. Provides the "builder's manual" for essential techniques--a one-stop shop that eliminates needless searching among untested techniques. Includes step-by-step methods for understanding the cell and molecular basis of wound healing, vascular integrin signaling, mechanical signaling in blood vessels, and vascular proteomics.

Researchers in biochemistry, cell and molecular biology, physiology, neurology, oncology, pathology, cardiology, rheumatology, opthamology, and genetics.

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  • Angiogenesis: In Vitro Systems, Volume - 1st Edition.
  • Rat Aortic Ring Model to Assay Angiogenesis ex vivo.
  • State-of-the-Art Methods for Evaluation of Angiogenesis and Tissue Vascularization.
  • Vasculogenic dynamics in 3D engineered tissue constructs | Scientific Reports.
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Table of Contents

David A. Cheresh. Volume , Chapter 1 Approaches for Studying Angiogenesis‐Related Signal Transduction. Behrad Derakhshan Chapter 8 An Assay System for In Vitro Detection of Permeability in Human “Endothelium”. Manuela. Purchase Angiogenesis: In Vitro Systems, Volume - 1st Edition. Print Book & E-Book. View all volumes in this series: Methods in Enzymology.

My bio page Edit user profile Signature Reset the password. A peer-reviewed protocol journal. No publication fee; no access fee. Isabelle Ernens isabelle. Yvan Devaux. Daniel R. Original research article A brief version of this protocol appeared in:. Similar Protocols.

Introduction

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Abstract Angiogenesis is a multifactorial event which requires the migration, proliferation, differentiation and structure rearrangement of endothelial cells. Fix the rat on his back on a dissecting board.

How Blood Vessel Networks Are Made and Measured

Make a Y-shape incision. Open the abdominal cavity. Cut the sternal plate and the diaphragm with scissors to expose the thoracic cavity. Displace the intestines, liver, stomach and spleen to the right side. Remove the lungs. The aorta is visible along the vertebral column. Excise the aorta starting at the point where abdominal aorta divides into two arteries up to the aortic arch using scissors placed parallel to the vertebral column and tweezers do not stretch and mechanically damage the aorta. All of the following steps will be performed under sterile conditions.

When the aorta is clean, transfer it to a clean Petri dish containing cold serum-free EBM-2 medium and keep it on ice. Prepare the collagen mix before cross-sectioning the thoracic aorta. Discard the aortic arch and the abdominal part of the aorta. Replace the medium 5 times with cold serum-free EBM-2 medium in the Petri-dish to rinse the rings.

OVERVIEW OF ANGIOGENESIS AND ECM IN THE ADULT

In summary, this study characterized and standardized a highly reproducible, efficient and quantifiable choroid microvascular ex vivo sprouting assay that can be obtained from rat and transgenic mice to study microvascular angiogenesis Table 2. Subsequently, as the newly formed capillary sprouts mature into new vessels with mature lumens, the intact laminin-rich basement membrane is reestablished, thereby sequestering ECs from interstitial collagens and reestablishing normal activation levels for signaling pathways that regulate EC stress fiber formation and barrier integrity Fig. The integrity of the choroidal vasculature is vital to vision and abnormal angiogenesis in the choroid is associated with ocular diseases such as age-related macular degeneration AMD [3] , retinitis pigmentosa PR [8] , diabetic retinopathy DR [9] and oxygen-induced retinopathy OIR [10]. This is an example where the functional roles of such matrices in adults and embryos appear very similar. By combining live imaging and analysis of the morphological processes of neovascular network formation in 3D engineered tissue constructs, we are able to characterize new mechanisms of network junction formation.

Take a ring with a forceps. Dry the ring by carefully dabbing it on the side of an empty Petri dish. Place the ring in the middle of the well at the top of the polymerized collagen. Repeat this process for all the rings, but be as quick as possible to make sure the rings do not dry out.

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Place the plate back in the incubator. Quantification Quantification of microvessel outgrowth is done manually from pictures obtained after days of culture with a 2. The quantification involves counting the number of vessels and branch points Nicosia and Ottinetti, A visualization of the counting process is presented in Aplin et al.

Representative data Figure 1. Representative pictures of one aortic ring at different times in culture top left to bottom left and pictures of aortic rings treated with a growing concentration of an angiogenic agent from left to right at 8 days post-isolation Notes Some isolated cells and vessels start to be present around days.

A well-developed network is visible around 7 to 9 days before regression. In this study, commercial collagen matrice has been used but it can be replaced by fibrin or Matrigel.