title: Impedimetric quantification of cells encapsulated in hydrogel cultured in a paper-based microchamber.
abstract: Recently, 3D cell culture technique was proposed to provide a more physiologically-meaningful environment for cell-based assays. With the development of microfluidics technology, cellular response can be quantified by impedance measurement technique in a real-time and non-invasive manner. However, handling of these microfluidic systems requires a trained engineering personnel and the operation is not compatible to traditional biological research laboratories. In this work, we incorporated the impedance measurement technique to paper-based 3D cell culture model and demonstrated non-invasive quantification of cells encapsulated in hydrogel during the culture course. A cellulose filter paper was patterned with an array of circular microchambers. Cells were encapsulated in hydrogel and loaded to the microchambers for culturing cells in 3D environment. At the preset schedule during the culture course, the paper was placed on a glass substrate with measurement electrodes for the impedance measurement. Cells in each microchamber was represented by impedance magnitude and cell proliferation could be studied over time. Also, conventional bio-assay was performed to further confirm the feasibility of the impedimetric quantification of cells encapsulated in hydrogel cultured in the paper-based microchamber. This technique provides a convenient, fast, and non-invasive approach to monitor cells cultured in 3D environment. It has potential to be developed for routine 3D cell culture protocol in biological research laboratories.
authors.affiliation: Graduate Institute of Medical Mechatronics, Chang Gung University, Taoyuan, Taiwan; Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan. Electronic address: kflei@mail.cgu.edu.tw.
authors.forename: Kin Fong
authors.initials: KF
authors.lastname: Lei
authors.affiliation: Graduate Institute of Medical Mechatronics, Chang Gung University, Taoyuan, Taiwan.
authors.forename: Chia-Hao
authors.initials: CH
authors.lastname: Huang
authors.affiliation: School of Traditional Chinese Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Radiation Oncology, Chang Gung Memorial Hospital, Linkou, Taiwan.
authors.forename: Ngan-Ming
authors.initials: NM
authors.lastname: Tsang
mesh_terms: D018929:Cell Culture Techniques; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D017097:Electric Impedance; D006801:Humans; D020100:Hydrogels; D010209:Paper
chemical_list: D020100:Hydrogels
keywords: 3D cell culture; Cell proliferation; Impedance measurement