title: A small physiological electric field mediated responses of extravillous trophoblasts derived from HTR8/SVneo cells: involvement of activation of focal adhesion kinase signaling.
abstract: Moderate invasion of trophoblast cells into endometrium is essential for the placental development and normal pregnancy. Electric field (EF)-induced effects on cellular behaviors have been observed in many cell types. This study was to investigate the effect of physiological direct current EF (dc EF) on cellular responses such as elongation, orientation and motility of trophoblast cells. Immortalized first trimester extravillous trophoblast cells (HTR-8/SVneo) were exposed to the dc EF at physiological magnitude. Cell images were recorded and analyzed by image analyzer. Cell lysates were used to detect protein expression by Western blot. Cultured in the dc EFs the cells showed elongation, orientation and enhanced migration rate compared with non-EF stimulated cells at field strengths of 100 mV/mm to 200 mV/mm. EF exposure increased focal adhesion kinase (FAK) phosphorylation in a time-dependent manner and increased expression levels of MMP-2. Pharmacological inhibition of FAK impaired the EF-induced responses including motility and abrogated the elevation of MMP-2 expression. However, the expression levels of integrins like integrin α1, α5, αV and β1 were not affected by EF stimulation. Our results demonstrate the importance of FAK activation in migration/motility of trophobalst cells driven by EFs. In addition, it raises the feasibility of using applied EFs to promote placentation through effects on trophoblast cells.
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Juan
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Rongmei
authors.initials: R
authors.lastname: Ren
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Luo
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Ping
authors.initials: P
authors.lastname: Fan
authors.affiliation: Department of Obstetrics and Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Xinghui
authors.initials: X
authors.lastname: Liu
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Shanshan
authors.initials: S
authors.lastname: Liang
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Ma
authors.affiliation: Laboratory of Cell and Gene Therapy, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Ping
authors.initials: P
authors.lastname: Yu
authors.affiliation: Laboratory of Genetic Disease and Perinatal Medicine and Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, P. R. China.
authors.forename: Huai
authors.initials: H
authors.lastname: Bai
mesh_terms: D002460:Cell Line; D002465:Cell Movement; D048430:Cell Shape; D004558:Electric Stimulation; D005260:Female; D051417:Focal Adhesion Kinase 1 / Q000378:metabolism; D006801:Humans; D020778:Matrix Metalloproteinase 2; D010929:Placentation; D011247:Pregnancy; D015398:Signal Transduction; D014327:Trophoblasts / Q000502:physiology*
chemical_list: D051417:Focal Adhesion Kinase 1; C496050:PTK2 protein, human; C522361:MMP2 protein, human; D020778:Matrix Metalloproteinase 2