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Development of a human cardiac tissue-based angiogenesis model
James M Lewis1, Catherine T Anthony, Lynn H Harrison
1Department of Surgery Sections of Surgical Endocrinology, Louisiana State University Health Sciences Center (LSUHSC), New Orleans, Louisiana 70112, USA.
The Journal of Surgical Research
|April 11, 2006
Summary
This study introduces a novel human cardiac tissue assay for studying angiogenesis. The model successfully demonstrated neovessel growth, offering a more accurate platform for human cardiovascular research.
Area of Science:
- Cardiovascular Biology
- Tissue Engineering
- Angiogenesis Research
Background:
- Traditional angiogenesis models using animal tissues (e.g., chicken chorioallantoic membrane, rabbit cornea) may not accurately represent human angiogenesis mechanisms.
- Limitations of current animal models necessitate the development of human-relevant systems for studying blood vessel formation.
Purpose of the Study:
- To develop and validate a human cardiac tissue-based assay for assessing angiogenesis.
- To investigate the potential of human myocardial tissue fragments to support neovascularization in vitro.
- To establish a platform for studying patient-specific cardiac angiogenesis.
Main Methods:
- Human atrial appendage tissue was obtained during cardiac bypass surgery.
- Tissue fragments were embedded in fibrin-thrombin clots and cultured.
- Neovessel invasion into the clot (%I) and microvessel growth (Angiogenic Index) were quantified over 14-16 days.
Main Results:
- Eighty percent (16/20) of human atrial appendage specimens exhibited an angiogenic response.
- Progressive neovessel growth was observed in all tested specimens over the culture period.
- The mean angiogenic index across all specimens was 8.59 +/- 0.91.
Conclusions:
- The developed human cardiac tissue assay is a viable model for studying angiogenesis.
- This assay can be utilized for screening compounds for human trials and for generating vascularized cardiac tissue for autotransplantation.
- The model provides a foundation for personalized medicine approaches to cardiac repair and revascularization.