Ischemia-Induced Apoptosis of Intestinal Epithelial Cells Correlates with Altered Integrin Distribution and Disassembly of F-Actin Triggered by Calcium Overload
Joint Authors
Jia, Zhenyi
Qin, Huanlong
Chen, Qian
Source
Journal of Biomedicine and Biotechnology
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-30
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
The present study examined intestinal epithelial cell (IEC) integrin distribution and disassembly of actin cytoskeleton in response to ischemia-anoxia.
Protective effects of calcium channel blocker(CCB) were further examined to explore underlying mechanisms of cellular injury.
Materials and Methods.
Primary cultures of rat IECs and an in vitro model of ischemia/anoxia were established.
IECs were exposed to ischemia/anoxia in the presence and absence of verapamil.
The extent of exfoliation was determined using light microscopy while apoptosis rate was measured using flow cytometry.
Changes in intracellular calcium, the distribution of integrins and the morphology of F-actin were assessed by confocal microscopy.
Results.
Detachment and apoptosis of IECs increased following ischemia/anoxia-induced injury.
Treatment with verapamil inhibited the detachment and apoptosis.
Under control conditions, the strongest fluorescent staining for integrins appeared on the basal surface of IECs while this re-distributed to the apical membrane in response to ischemic injury.
Depolymerization of F-actin was also observed in the injured cells.
Verapamil attenuated both changes of integrins and F-actin.
Conclusions.
Redistribution of integrins and disruption of F-actin under ischemia/anoxia injury is associated with IEC detachment and increased apoptosis.
These events appeared to be triggered by an increase in Ca2+i suggesting a potential use for CCB in prevention and treatment of intestinal injury.
American Psychological Association (APA)
Jia, Zhenyi& Chen, Qian& Qin, Huanlong. 2012. Ischemia-Induced Apoptosis of Intestinal Epithelial Cells Correlates with Altered Integrin Distribution and Disassembly of F-Actin Triggered by Calcium Overload. Journal of Biomedicine and Biotechnology،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-485510
Modern Language Association (MLA)
Jia, Zhenyi…[et al.]. Ischemia-Induced Apoptosis of Intestinal Epithelial Cells Correlates with Altered Integrin Distribution and Disassembly of F-Actin Triggered by Calcium Overload. Journal of Biomedicine and Biotechnology No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-485510
American Medical Association (AMA)
Jia, Zhenyi& Chen, Qian& Qin, Huanlong. Ischemia-Induced Apoptosis of Intestinal Epithelial Cells Correlates with Altered Integrin Distribution and Disassembly of F-Actin Triggered by Calcium Overload. Journal of Biomedicine and Biotechnology. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-485510
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-485510