Effects of electromagnetic field frequencies on chondrocytes in 3D cell-printed composite constructs
Hee-Gyeong Yi
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 37673, Korea
Search for more papers by this authorKyung Shin Kang
Department of Anatomy & Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202 USA
Search for more papers by this authorJung Min Hong
Department of Anatomy & Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202 USA
Search for more papers by this authorJinah Jang
Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Kyungbuk 37673, Korea
Search for more papers by this authorMoon Nyeo Park
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 37673, Korea
Search for more papers by this authorCorresponding Author
Young Hun Jeong
School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea
Correspondence to: Y. H. Jeong, e-mail: [email protected] or D.-W. Cho, e-mail: [email protected]Search for more papers by this authorCorresponding Author
Dong-Woo Cho
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 37673, Korea
Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Kyungbuk 37673, Korea
Correspondence to: Y. H. Jeong, e-mail: [email protected] or D.-W. Cho, e-mail: [email protected]Search for more papers by this authorHee-Gyeong Yi
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 37673, Korea
Search for more papers by this authorKyung Shin Kang
Department of Anatomy & Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202 USA
Search for more papers by this authorJung Min Hong
Department of Anatomy & Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana 46202 USA
Search for more papers by this authorJinah Jang
Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Kyungbuk 37673, Korea
Search for more papers by this authorMoon Nyeo Park
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 37673, Korea
Search for more papers by this authorCorresponding Author
Young Hun Jeong
School of Mechanical Engineering, Kyungpook National University, Daegu 41566, Korea
Correspondence to: Y. H. Jeong, e-mail: [email protected] or D.-W. Cho, e-mail: [email protected]Search for more papers by this authorCorresponding Author
Dong-Woo Cho
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 37673, Korea
Division of Integrative Biosciences and Biotechnology, POSTECH, Pohang, Kyungbuk 37673, Korea
Correspondence to: Y. H. Jeong, e-mail: [email protected] or D.-W. Cho, e-mail: [email protected]Search for more papers by this authorAbstract
In cartilage tissue engineering, electromagnetic field (EMF) therapy has been reported to have a modest effect on promoting cartilage regeneration. However, these studies were conducted using different frequencies of EMF to stimulate chondrocytes. Thus, it is necessary to investigate the effect of EMF frequency on cartilage formation. In addition to the stimulation, a scaffold is required to satisfy the characteristics of cartilage such as its hydrated and dense extracellular matrix, and a mechanical resilience to applied loads. Therefore, we 3D-printed a composite construct composed of a polymeric framework and a chondrocyte-laden hydrogel. Here, we observed frequency-dependent positive and negative effects on chondrogenesis using a 3D cell-printed cartilage tissue. We found that a frequency of 45 Hz promoted gene expression and secretion of extracellular matrix molecules of chondrocytes. In contrast, a frequency of 7.5 Hz suppressed chondrogenic differentiation in vitro. Additionally, the EMF-treated composite constructs prior to implantation showed consistent results with those of in vitro, suggesting that in vitro pre-treatment with different EMF frequencies provides different capabilities for the enhancement of cartilage formation in vivo. This correlation between EMF frequency and 3D-printed chondrocytes suggests the necessity for optimization of EMF parameters when this physical stimulus is applied to engineered cartilage. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 1797–1804, 2016.
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