Assessing angiogenesis during fracture healing.

Chuanyong Lu, Ralph Marcucio, Theodore Miclau

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Angiogenesis, the sprouting of new capillaries from existing blood vessels, is crucial for normal fracture healing. Angiogenesis is a complex process involving a variety of growth factors and several cell types. The mechanism regulating angiogenesis during fracture repair is not well understood, and the relationships between angiogenesis, chondrogenesis, and osteogenesis are also undefined. In vivo animal models have been useful for determining angiogenic mechanisms. In particular, a murine model has been developed that offers the advantages of easy animal handling, low cost, reliable healing, and the availability of molecular and genetic techniques for research. However, the small size of mice provides challenges, including the inability to assess vascularization using techniques that have been employed in larger animals. Therefore, we developed and optimized techniques specifically for studying angiogenesis during mouse fracture repair. These techniques include blood vessel casting, micro-computed tomography (micro-CT), immunohistochemistry, in situ hybridization, and genetic labeling of endothelial cells. Blood vessel casting and micro-CT are useful for visualization of small blood vessels. Immunohistochemistry using anti-PECAM (platelet endothelial cell adhesion molecule) or CD34 antibodies and genetic approaches using Tie2-cre transgenic mice can be used to label endothelial cells, visualize blood vessels including capillaries, and provide structural information about the vascularization of the fracture callous. Lastly, expression patterns of important growth factors regulating angiogenesis could be assessed by molecular approaches such as in situ hybridization.

Original languageEnglish (US)
Pages (from-to)17-26
Number of pages10
JournalThe Iowa orthopaedic journal
Volume26
StatePublished - 2006
Externally publishedYes

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Fracture Healing
Blood Vessels
Endothelial Cells
In Situ Hybridization
Intercellular Signaling Peptides and Proteins
Immunohistochemistry
Tomography
Chondrogenesis
Genetic Techniques
Genetic Research
Cell Adhesion Molecules
Osteogenesis
Transgenic Mice
Molecular Biology
Blood Platelets
Animal Models
Costs and Cost Analysis
Antibodies

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Assessing angiogenesis during fracture healing. / Lu, Chuanyong; Marcucio, Ralph; Miclau, Theodore.

In: The Iowa orthopaedic journal, Vol. 26, 2006, p. 17-26.

Research output: Contribution to journalArticle

Lu, C, Marcucio, R & Miclau, T 2006, 'Assessing angiogenesis during fracture healing.', The Iowa orthopaedic journal, vol. 26, pp. 17-26.
Lu, Chuanyong ; Marcucio, Ralph ; Miclau, Theodore. / Assessing angiogenesis during fracture healing. In: The Iowa orthopaedic journal. 2006 ; Vol. 26. pp. 17-26.
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