Induction of chondrogenic differentiation of human adipose-derived stem cells by low frequency electric field


1 Department of Anatomical Sciences and Molecular Biology, Medical School, Isfahan University of Medical Sciences, Isfahan, Iran

2 Fertility and Infertility Research Center, Medical School, Kermanshah University of Medical Sciences, Kermanshah, Iran

3 Department of Electrical Engineering, Engineering School, Isfahan University, Isfahan, Iran


Background: Since when the cartilage damage (e.g., with the osteoarthritis) it could not be repaired in the body, hence for its reconstruction needs cell therapy. For this purpose, adipose-derived stem cells (ADSCs) is one of the best cell sources because by the tissue engineering techniques it can be differentiated into chondrocytes. Chemical and physical inducers is required order to stem cells to chondrocytes differentiating. We have decided to define the role of electric field (EF) in inducing chondrogenesis process.
Materials and Methods: A low frequency EF applied the ADSCs as a physical inducer for chondrogenesis in a 3D micromass culture system which ADSCs were extracted from subcutaneous abdominal adipose tissue. Also enzyme-linked immunosorbent assay, methyl thiazolyl tetrazolium, real time polymerase chain reaction and flowcytometry techniques were used for this study.

Results: We found that the 20 minutes application of 1 kHz, 20 mv/cm EF leads to chondrogenesis in ADSCs. Although our results suggest that application of physical (EF) and chemical (transforming growth factor-β3) inducers at the same time, have best results in expression of collagen type II and SOX9genes. It is also seen EF makes significant decreased expression of collagens type I and X genes.
Conclusion: The low frequency EF can be a good motivator to promote chondrogenic differentiation of human ADSCs.


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