title: Impedance studies of bio-behavior and chemosensitivity of cancer cells by micro-electrode arrays.
abstract: Impedimetric analysis on adherently growing cells by micro-electrodes provides information related to cell number, cell adhesion and cellular morphology. In this study, cell-based biosensor with micro-electrode arrays (MEAs) was used to monitor the culture behavior of mammalian cancer cells and evaluate the chemosensitivity of anti-cancer drugs using electrochemical impedance spectroscopy. The platinum electrode arrays were fabricated by semiconductor technology to a 10 x 10 pattern, with diameter of 80 microm of each electrode. The human oesophageal cancer cell lines (KYSE 30) were cultured on the surface of the electrodes with the pre-coated fibronectin, the connecting protein for tumor cells metastasis and adhesion in extracellular matrix. Morphology changes during cells adhesion, spreading, and proliferation can be detected by impedimetric analysis in a real time and non-invasive way. Cisplatin was added to cells for potential drug screening applications. The experimental results show that this well-known anti-cancer drug has characteristic chemosensitivity effects on KYSE 30 cells which can be detected by MEA. Thus, this cell-based chip provides a useful analytical method for cancer research.
authors.affiliation: Biosensor National Special Laboratory, Key Laboratory of Biomedical Engineering of Education Ministry, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, PR China.
authors.forename: Qingjun
authors.initials: Q
authors.lastname: Liu
authors.forename: Jinjiang
authors.initials: J
authors.lastname: Yu
authors.forename: Lidan
authors.initials: L
authors.lastname: Xiao
authors.forename: Johnny Cheuk On
authors.initials: JC
authors.lastname: Tang
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.forename: Mo
authors.initials: M
authors.lastname: Yang
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage; D001681:Biological Assay / Q000295:instrumentation*; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D045744:Cell Line, Tumor; D002945:Cisplatin / Q000008:administration & dosage*; D004305:Dose-Response Relationship, Drug; D004353:Drug Evaluation, Preclinical / Q000295:instrumentation* / Q000379:methods; D017097:Electric Impedance; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004938:Esophageal Neoplasms / Q000473:pathology* / Q000503:physiopathology*; D006801:Humans; D008839:Microelectrodes; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D000970:Antineoplastic Agents; D002945:Cisplatin