| Title |
Use of Human Cancer Cell Lines Mitochondria to Explore the Mechanisms of BH3 Peptides and ABT-737-Induced Mitochondrial Membrane Permeabilization
|
|---|---|
| Published in |
PLOS ONE, March 2010
|
| DOI | 10.1371/journal.pone.0009924 |
| Pubmed ID | |
| Authors |
Nelly Buron, Mathieu Porceddu, Magali Brabant, Diana Desgué, Cindy Racoeur, Myriam Lassalle, Christine Péchoux, Pierre Rustin, Etienne Jacotot, Annie Borgne-Sanchez |
| Abstract |
Current limitations of chemotherapy include toxicity on healthy tissues and multidrug resistance of malignant cells. A number of recent anti-cancer strategies aim at targeting the mitochondrial apoptotic machinery to induce tumor cell death. In this study, we set up protocols to purify functional mitochondria from various human cell lines to analyze the effect of peptidic and xenobiotic compounds described to harbour either Bcl-2 inhibition properties or toxic effects related to mitochondria. Mitochondrial inner and outer membrane permeabilization were systematically investigated in cancer cell mitochondria versus non-cancerous mitochondria. The truncated (t-) Bid protein, synthetic BH3 peptides from Bim and Bak, and the small molecule ABT-737 induced a tumor-specific and OMP-restricted mitochondrio-toxicity, while compounds like HA-14.1, YC-137, Chelerythrine, Gossypol, TW-37 or EM20-25 did not. We found that ABT-737 can induce the Bax-dependent release of apoptotic proteins (cytochrome c, Smac/Diablo and Omi/HtrA2 but not AIF) from various but not all cancer cell mitochondria. Furthermore, ABT-737 addition to isolated cancer cell mitochondria induced oligomerization of Bax and/or Bak monomers already inserted in the mitochondrial membrane. Finally immunoprecipatations indicated that ABT-737 induces Bax, Bak and Bim desequestration from Bcl-2 and Bcl-xL but not from Mcl-1L. This study investigates for the first time the mechanism of action of ABT-737 as a single agent on isolated cancer cell mitochondria. Hence, this method based on MOMP (mitochondrial outer membrane permeabilization) is an interesting screening tool, tailored for identifying Bcl-2 antagonists with selective toxicity profile against cancer cell mitochondria but devoid of toxicity against healthy mitochondria. |
Mendeley readers
The data shown below were compiled from readership statistics for 67 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 3 | 4% |
| France | 2 | 3% |
| Czechia | 1 | 1% |
| South Africa | 1 | 1% |
| Taiwan | 1 | 1% |
| United Kingdom | 1 | 1% |
| Unknown | 58 | 87% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 22 | 33% |
| Student > Ph. D. Student | 13 | 19% |
| Student > Master | 6 | 9% |
| Professor > Associate Professor | 4 | 6% |
| Student > Bachelor | 3 | 4% |
| Other | 9 | 13% |
| Unknown | 10 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 30 | 45% |
| Biochemistry, Genetics and Molecular Biology | 11 | 16% |
| Medicine and Dentistry | 5 | 7% |
| Chemistry | 4 | 6% |
| Engineering | 3 | 4% |
| Other | 3 | 4% |
| Unknown | 11 | 16% |