Knowledge of the mechano-electrochemical signals around the cells and solute transport within a tissue is crucial to understanding cell biology, tissue growth and remodeling in vivo or in vitro. Bioreactors are essential for tissue engineering in vitro as the environment of engineered tissue construct could be controlled. Computer simulations are useful for estimation and prediction of the physical signals within the tissue or tissue construct if the environment of the tissue and the tissue properties are known. However, there is virtually no technology which is capable of online characterizing mechano-electrochemical properties of engineered tissue, or controlling physical signals within the tissue. The proposed research activities will fill the gap in this area. The longterm goals of this study are (1) to engineer functional tissues in vitro for implantation in vivo, and (2) to understand the relationship between mechano-chemical environment and tissue growth (Le., growth laws) for connective (e,g"""""""" intervertebral disc) tissues. The objective of this proposed project is to develop novel, bioreactor technology that could online monitor the changes in tissue properties as tissue growth in the bioreactor. In this project, a new bioreactor system will be designed and fabricated. New methods and techniques for characterizing of mechano-electrochemical properties of the engineered tissue will be developed.

Public Health Relevance

This project is to develop new technology for the development of functional tissues in vitro for implantation in vivo. The proposed studies are important for understanding the mechanisms of tissue growth under physiological conditions as well as the etiology of tissue failure under pathological situations.

Agency
National Institute of Health (NIH)
Institute
National Institute of Biomedical Imaging and Bioengineering (NIBIB)
Type
Research Project (R01)
Project #
5R01EB008653-02
Application #
7911620
Study Section
Special Emphasis Panel (ZEB1-OSR-D (M1))
Program Officer
Hunziker, Rosemarie
Project Start
2009-08-15
Project End
2012-07-31
Budget Start
2010-08-01
Budget End
2012-07-31
Support Year
2
Fiscal Year
2010
Total Cost
$370,000
Indirect Cost
Name
University of Miami Coral Gables
Department
Biomedical Engineering
Type
Schools of Engineering
DUNS #
625174149
City
Coral Gables
State
FL
Country
United States
Zip Code
33146
Gao, Xin; Zhu, Qiaoqiao; Gu, Weiyong (2015) Analyzing the effects of mechanical and osmotic loading on glycosaminoglycan synthesis rate in cartilaginous tissues. J Biomech 48:573-7
Gu, Weiyong; Zhu, Qiaoqiao; Gao, Xin et al. (2014) Simulation of the progression of intervertebral disc degeneration due to decreased nutritional supply. Spine (Phila Pa 1976) 39:E1411-7
Zhu, Qiaoqiao; Gao, Xin; Gu, Weiyong (2014) Temporal changes of mechanical signals and extracellular composition in human intervertebral disc during degenerative progression. J Biomech 47:3734-43
Gao, Xin; Gu, Weiyong (2014) A new constitutive model for hydration-dependent mechanical properties in biological soft tissues and hydrogels. J Biomech 47:3196-200
Wang, Chong; Gonzales, Silvia; Levene, Howard et al. (2013) Energy metabolism of intervertebral disc under mechanical loading. J Orthop Res 31:1733-8
Zhu, Qiaoqiao; Jackson, Alicia R; Gu, Wei Yong (2012) Cell viability in intervertebral disc under various nutritional and dynamic loading conditions: 3d finite element analysis. J Biomech 45:2769-77
Jackson, Alicia R; Yuan, Tai-Yi; Huang, Chun-Yuh et al. (2012) Nutrient transport in human annulus fibrosus is affected by compressive strain and anisotropy. Ann Biomed Eng 40:2551-8
Huang, C-Y; Travascio, F; Gu, W Y (2012) Quantitative analysis of exogenous IGF-1 administration of intervertebral disc through intradiscal injection. J Biomech 45:1149-55
Fernando, Hanan N; Czamanski, Jessica; Yuan, Tai-Yi et al. (2011) Mechanical loading affects the energy metabolism of intervertebral disc cells. J Orthop Res 29:1634-41
Travascio, Francesco; Gu, Wei Yong (2011) Simultaneous measurement of anisotropic solute diffusivity and binding reaction rates in biological tissues by FRAP. Ann Biomed Eng 39:53-65

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