The moderate clinical success of stem cell injections for the treatment of myocardial infarction has been mainly attributed to the low retention and survival of injected cells. Implantation of the engineered cardiac tissue patch is expected to yield improved survival of delivered cells, and potentially, a more efficient structural and functional tissue reconstruction at the infarct site. While in the past 15 years the field of cardiac tissue engineering has benefited from the use of neonatal rat cardiomyocytes, it is well recognized that these cells will remain limited to in vitro model systems and proof-of-concept in vivo studies. On the other hand, cardiac tissue patches made of stem cells offer a potential for translation to clinical practice. In particular, large quantities of cardiogenic cells can be obtained from pluripotent stem cell sources (embryonic or induced pluripotent stem cells), which offers an exciting opportunity to develop and utilize a relatively large, functional cardiac tissue patch for the treatment of myocardial injury. Unfortunately, the clear design rules to engineer a highly functional, stem cell- derived cardiac tissue patch are currently non-existent. Therefore, in order to significantly promote the field of cardiac tissue engineering, we propose to combine our novel tissue engineering approach with tools from developmental and cancer biology to design an electromechanically functional, stem cell-derived cardiac tissue patch that can rapidly vascularize and functionally integrate with host tissue and yield the repair of myocardial injury. Specifically, we propose to: 1) systematically study different mouse embryonic stem cell-derived cardiogenic populations for their ability to functionally integrate with neonatal rat myocytes and assemble into a highly functional cardiac tissue patch in vitro, 2) explore different structural and biochemical factors to enhance vascularization, survival, and functionality of these tissue patches upon implantation in mouse dorsal skin flap chamber model, and 3) investigate implantation conditions in the setting of mouse myocardial infarction to yield safe and efficient functional integration of the patch and host tissue, and consequently, a significantly improved cardiac function. The knowledge obtained in this project will allow us to pursue in the future engineering of a functional cardiac tissue patch made of human stem cells for potential clinical applications.

Public Health Relevance

Heart failure is one of the most prominent cardiac diseases in USA that usually develops due to irreversible damage of heart tissue following a heart attack. This proposal is aimed to advance the field of stem cell therapies for heart disease by developing a highly functional cardiac tissue patch starting from pluripotent stem cells. This patch is expected to efficiently vascularize and functionally integrate with host heart tissue after implantation, and in turn prevent the occurrence or progression of heart failure.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL104326-03
Application #
8270023
Study Section
Bioengineering, Technology and Surgical Sciences Study Section (BTSS)
Program Officer
Lundberg, Martha
Project Start
2010-07-01
Project End
2015-04-30
Budget Start
2012-05-01
Budget End
2013-04-30
Support Year
3
Fiscal Year
2012
Total Cost
$380,622
Indirect Cost
$133,122
Name
Duke University
Department
Biomedical Engineering
Type
Schools of Engineering
DUNS #
044387793
City
Durham
State
NC
Country
United States
Zip Code
27705
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Rangarajan, Swathi; Madden, Lauran; Bursac, Nenad (2014) Use of flow, electrical, and mechanical stimulation to promote engineering of striated muscles. Ann Biomed Eng 42:1391-405
Bursac, Nenad (2014) Cardiac fibroblasts in pressure overload hypertrophy: the enemy within? J Clin Invest 124:2850-3
Hsiai, Tzung; Li, Song; Bursac, Nenad (2014) Introduction to the special issue on tissue engineering and regenerative medicine. Ann Biomed Eng 42:1355-6

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