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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ben-hail, Danya Shoshan-barmatz, Varda |
| Description | Author Affiliation: Ben-Hail D ( Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel); Shoshan-Barmatz V ( Department of Life Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel) |
| Abstract | Mitochondria-mediated apoptosis involves pro-apoptotic protein release from the mitochondria to the cytosol, triggering apoptosis. However, the mechanisms by which apoptotic initiators cross the outer mitochondrial membrane (OMM) remain unclear. The voltage-dependent anion channel 1 (VDAC1), an OMM protein, is central to mitochondria-mediated apoptosis. In previous work, we demonstrated that apoptosis induction is associated with VDAC1 oligomerization, forming a mega-pore that mediates pro-apoptotic protein release. Here, we demonstrated that several known anion transport inhibitors, DIDS, SITS, H $_{2}$ DIDS, DNDS, and DPC, all interact with VDAC1, as revealed by micro-scale thermophoresis and decreased conductance of bilayer-reconstituted VDAC1. These compounds inhibited apoptosis stimuli-induced release of mitochondrial pro-apoptotic proteins, apoptosis and VDAC1 oligomerization, as monitored by chemical cross-linking or in living cells by BRET2. Moreover, the compounds inhibited VDAC1 oligomerization in isolated mitochondria and as induced by VDAC1 over-expression, suggesting that the inhibitory effect of the tested compounds involved VDAC1. Finally, the compounds also inhibited apoptosis-associated increases in intracellular Ca $^{2$ + , ([Ca $^{2$ + ]i), ROS production, mitochondria membrane potential dissipation and the increase in VDAC1 expression levels. The results presented here explored a new mechanism of action for DIDS and its analogs. All inhibited apoptosis via direct interaction with VDAC1 to inhibit its oligomerization and subsequent Cyto c release and apoptosis. Such results may allow the development of a VDAC1-specific inhibitor that would offer substantial insight into the function of VDAC1 in controlling metabolism, energy production, cholesterol transport and apoptosis. Finally, inhibitors of apoptosis could serve in pathological conditions where enhanced apoptosis is found, such as neurodegenerative diseases. |
| ISSN | 00063002 |
| Journal | Biochimica et Biophysica Acta (BBA) - Reviews on Cancer |
| Part | Pt A |
| Issue Number | 7 |
| Volume Number | 1863 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-07-01 |
| Publisher Place | Netherlands |
| Access Restriction | Open |
| Subject Keyword | Apoptosis Drug Effects Membrane Transport Modulators Pharmacology Mitochondrial Membranes Voltage-Dependent Anion Channel 1 Antagonists & Inhibitors Calcium Signaling Cisplatin Cytochromes c Metabolism Dose-Response Relationship, Drug HeLa Cells Membrane Potential, Mitochondrial Oxidative Stress Protein Multimerization Reactive Oxygen Species Transfection Genetics Research Support, Non-U.S. Gov't Biochemistry |
| Content Type | Text |
| Resource Type | Article |
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