Intracellular pH Regulates TRAIL-Induced Apoptosis and Necroptosis in Endothelial Cells
Joint Authors
Zhang, Zhu-Xu
Gan, Ingrid
Pavlosky, Alexander
Huang, Xuyan
Fuhrmann, Benjamin
Jevnikar, Anthony M.
Source
Journal of Immunology Research
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-08-13
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
During ischemia or inflammation of organs, intracellular pH can decrease if acid production exceeds buffering capacity.
Thus, the microenvironment can expose parenchymal cells to a reduced extracellular pH which can alter pH-dependent intracellular functions.
We have previously shown that while silencing caspase-8 in an in vivo ischemia reperfusion injury (IRI) model results in improved organ function and survival, removal of caspase-8 function in a donor organ can paradoxically result in enhanced receptor-interacting protein kinase 1/3- (RIPK1/3-) regulated necroptosis and accelerated graft loss following transplantation.
In our current study, TRAIL- (TNF-related apoptosis-inducing ligand-) induced cell death in vitro at neutral pH and caspase-8 inhibition-enhanced RIPK1-dependent necroptotic death were confirmed.
In contrast, both caspase-8 inhibition and RIPK1 inhibition attenuated cell death at a cell pH of 6.7.
Cell death was attenuated with mixed lineage kinase domain-like (MLKL) silencing, indicating that MLKL membrane rupture, a distinctive feature of necroptosis, occurs regardless of pH.
In summary, there is a distinct regulatory control of apoptosis and necroptosis in endothelial cells at different intracellular pH.
These results highlight the complexity of modulating cell death and therapeutic strategies that may need to consider different consequences on cell death dependent on the model.
American Psychological Association (APA)
Zhang, Zhu-Xu& Gan, Ingrid& Pavlosky, Alexander& Huang, Xuyan& Fuhrmann, Benjamin& Jevnikar, Anthony M.. 2017. Intracellular pH Regulates TRAIL-Induced Apoptosis and Necroptosis in Endothelial Cells. Journal of Immunology Research،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1181570
Modern Language Association (MLA)
Zhang, Zhu-Xu…[et al.]. Intracellular pH Regulates TRAIL-Induced Apoptosis and Necroptosis in Endothelial Cells. Journal of Immunology Research No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1181570
American Medical Association (AMA)
Zhang, Zhu-Xu& Gan, Ingrid& Pavlosky, Alexander& Huang, Xuyan& Fuhrmann, Benjamin& Jevnikar, Anthony M.. Intracellular pH Regulates TRAIL-Induced Apoptosis and Necroptosis in Endothelial Cells. Journal of Immunology Research. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1181570
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1181570