title: Real-time monitoring of neural differentiation of human mesenchymal stem cells by electric cell-substrate impedance sensing.
abstract: Stem cells are useful for cell replacement therapy. Stem cell differentiation must be monitored thoroughly and precisely prior to transplantation. In this study we evaluated the usefulness of electric cell-substrate impedance sensing (ECIS) for in vitro real-time monitoring of neural differentiation of human mesenchymal stem cells (hMSCs). We cultured hMSCs in neural differentiation media (NDM) for 6 days and examined the time-course of impedance changes with an ECIS array. We also monitored the expression of markers for neural differentiation, total cell count, and cell cycle profiles. Cellular expression of neuron and oligodendrocyte markers increased. The resistance value of cells cultured in NDM was automatically measured in real-time and found to increase much more slowly over time compared to cells cultured in non-differentiation media. The relatively slow resistance changes observed in differentiating MSCs were determined to be due to their lower growth capacity achieved by induction of cell cycle arrest in G0/G1. Overall results suggest that the relatively slow change in resistance values measured by ECIS method can be used as a parameter for slowly growing neural-differentiating cells. However, to enhance the competence of ECIS for in vitro real-time monitoring of neural differentiation of MSCs, more elaborate studies are needed.
authors.affiliation: Department of Biological Science, Gachon University of Medicine and Science, Incheon 406-799, Republic of Korea.
authors.forename: Hyo Eun
authors.initials: HE
authors.lastname: Park
authors.forename: Donghee
authors.initials: D
authors.lastname: Kim
authors.forename: Hyun Sook
authors.initials: HS
authors.lastname: Koh
authors.forename: Sungbo
authors.initials: S
authors.lastname: Cho
authors.forename: Jung-Suk
authors.initials: JS
authors.lastname: Sung
authors.forename: Jae Young
authors.initials: JY
authors.lastname: Kim
mesh_terms: D015415:Biomarkers / Q000032:analysis; D018929:Cell Culture Techniques; D002453:Cell Cycle / Q000502:physiology; D017097:Electric Impedance; D015870:Gene Expression; D006801:Humans; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000502:physiology*; D055495:Neurogenesis; D009474:Neurons / Q000502:physiology*; D009836:Oligodendroglia / Q000378:metabolism / Q000502:physiology*
chemical_list: D015415:Biomarkers