Directly targeting the mitochondrial pathway of apoptosis for cancer therapy using BH3 mimetics - recent successes,
Kristopher A Sarosiek1,2, Anthony Letai3,4
1Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.
Abstract:
Apoptosis within cancer cells is controlled by the BCL-2 family of proteins, making them powerful arbiters of cell fate in response to stress induced by neoplastic transformation as well as exposure to anti-cancer therapies. Many cancers evade pro-apoptotic stress signals by up-regulating anti-apoptotic proteins such as BCL-2, BCL-XL or MCL-1 to maintain their survival. However, this may come at a cost, as these cancers may also become dependent on these anti-apoptotic proteins for survival. The development and deployment of BCL-2 family inhibitors (drugs that mimic the activity of pro-apoptotic BH3-only proteins or 'BH3 mimetics') is based on this paradigm, and the first potent and specific molecules are now being evaluated in clinical trials. We review the recent successes in this field, the challenges currently being faced, and the promising future ahead.
Insights
Cancer cells
Area of Science:
- Molecular biology
- Cancer biology
- Drug discovery
Background:
- The BCL-2 protein family regulates apoptosis, crucial for cancer cell survival.
- Cancer cells often up-regulate anti-apoptotic proteins (e.g., BCL-2, BCL-XL, MCL-1) to evade cell death.
- This up-regulation can create a dependency on these proteins for cancer cell survival.
Purpose of the Study:
- To review the progress, challenges, and future directions of BCL-2 family inhibitors in cancer therapy.
- To highlight the therapeutic potential of targeting anti-apoptotic proteins in cancer.
Main Methods:
- Review of recent scientific literature and clinical trial data.
- Analysis of the mechanism of action for BH3 mimetics.
- Discussion of cancer cell dependency on anti-apoptotic proteins.
Main Results:
- The development of potent and specific BCL-2 family inhibitors (BH3 mimetics) is advancing.
- These inhibitors are currently undergoing clinical evaluation.
- Targeting anti-apoptotic proteins shows promise for cancer treatment.
Conclusions:
- BCL-2 family inhibitors represent a promising therapeutic strategy for cancers.
- Overcoming challenges in this field will be key to successful clinical deployment.
- Targeting cancer cell survival mechanisms offers a viable path for novel anti-cancer drugs.
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