title: Regulation of adipose-tissue-derived stromal cell orientation and motility in 2D- and 3D-cultures by direct-current electrical field.
abstract: Cell alignment and motility play a critical role in a variety of cell behaviors, including cytoskeleton reorganization, membrane-protein relocation, nuclear gene expression, and extracellular matrix remodeling. Direct current electric field (EF) in vitro can direct many types of cells to align vertically to EF vector. In this work, we investigated the effects of EF stimulation on rat adipose-tissue-derived stromal cells (ADSCs) in 2D-culture on plastic culture dishes and in 3D-culture on various scaffold materials, including collagen hydrogels, chitosan hydrogels and poly(L-lactic acid)/gelatin electrospinning fibers. Rat ADSCs were exposed to various physiological-strength EFs in a homemade EF-bioreactor. Changes of morphology and movements of cells affected by applied EFs were evaluated by time-lapse microphotography, and cell survival rates and intracellular calcium oscillations were also detected. Results showed that EF facilitated ADSC morphological changes, under 6 V/cm EF strength, and that ADSCs in 2D-culture aligned vertically to EF vector and kept a good cell survival rate. In 3D-culture, cell galvanotaxis responses were subject to the synergistic effect of applied EF and scaffold materials. Fast cell movement and intracellular calcium activities were observed in the cells of 3D-culture. We believe our research will provide some experimental references for the future study in cell galvanotaxis behaviors.
authors.affiliation: Department of Medical Information and Engineering, School of Electrical Engineering and Information, Sichuan University, Chengdu, 610065, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yang
authors.affiliation: Center of Engineering-Training, Chengdu Aeronautic Polytechnic, Chengdu, 610100, China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Long
authors.affiliation: Department of Medical Information and Engineering, School of Electrical Engineering and Information, Sichuan University, Chengdu, 610065, China.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Ren
authors.affiliation: Department of Orthopaedics, Yongchuan Hospital, Chongqing Medical University, Chongqing, 402160, China.
authors.forename: Kunlong
authors.initials: K
authors.lastname: Ma
authors.affiliation: Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China.
authors.forename: Zhenghua
authors.initials: Z
authors.lastname: Xiao
authors.affiliation: Department of Medical Information and Engineering, School of Electrical Engineering and Information, Sichuan University, Chengdu, 610065, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China.
authors.forename: Yingqiang
authors.initials: Y
authors.lastname: Guo
mesh_terms: D000273:Adipose Tissue / Q000166:cytology*; D000818:Animals; D002118:Calcium / Q000378:metabolism; D020013:Calcium Signaling / Q000502:physiology; D018929:Cell Culture Techniques / Q000295:instrumentation / Q000379:methods*; D002465:Cell Movement; D002470:Cell Survival; D002478:Cells, Cultured; D048271:Chitosan / Q000378:metabolism; D003094:Collagen / Q000378:metabolism; D003599:Cytoskeleton / Q000378:metabolism / Q000502:physiology*; D004558:Electric Stimulation / Q000379:methods; D004574:Electromagnetic Fields; D020100:Hydrogels / Q000378:metabolism; D007773:Lactates / Q000378:metabolism; D008856:Microscopy, Fluorescence; D011092:Polyethylene Glycols / Q000378:metabolism; D051381:Rats; D017154:Stromal Cells / Q000166:cytology / Q000378:metabolism / Q000502:physiology*; D059008:Time-Lapse Imaging
chemical_list: D020100:Hydrogels; D007773:Lactates; C088513:poly(lactic acid-ethylene glycol); D011092:Polyethylene Glycols; D003094:Collagen; D048271:Chitosan; D002118:Calcium
keywords: 3D-culture; alignment; electrical stimulation; scaffold; stem cells