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Updated: Mar 8, 2026

Examining BCL-2 Family Function with Large Unilamellar Vesicles
Published on: October 5, 2012
Therapeutic inhibition of BCL-2 and related family members
Michelle A Levy1, David F Claxton1
1a Penn State Milton S. Hershey Medical Center , Penn State Hershey Cancer Institute , Hershey , PA , USA.
Introduction:
BCL-2 proteins are key players in the balance of cell life and death. Their roles in the development and biology of cancer have been well established and continue to be investigated. Understanding the mechanisms by which these proteins regulate apoptosis has led to the development of small molecule targeted therapies that act to overcome the cell's ability to evade programmed cell death. Areas covered: The biology of the intrinsic apoptotic pathway is reviewed with attention to the varied roles of the anti-apoptotic members of the BCL-2 family. BH3 profiling is reviewed. Historical therapeutic agents are addressed, and currently investigated BH3 mimetics are described with attention to clinical significance. The limitations of BCL-2 family targeted drugs with regard to on-target and off-target toxicities are explored. Agents under development for targeting MCL-1 and other BCL-2 family members are discussed. Expert opinion: ABT-199 (venetoclax) and other BH3 mimetics have entered the clinical arena and show promising results in both hematologic and solid malignancies. Use of agents targeting this system will likely expand, and likely a number of malignant diseases will be successfully targeted resulting in improved treatment responses and patient survival.
Insights
Targeting BCL-2 proteins with BH3 mimetics offers a promising strategy to combat cancer by restoring programmed cell death. These therapies are showing significant clinical success in various malignancies.
Area of Science:
- Molecular Biology
- Oncology
- Pharmacology
Background:
- BCL-2 proteins regulate apoptosis, influencing cancer development and progression.
- Dysregulation of apoptosis is a hallmark of cancer, enabling tumor cell survival.
- Targeting BCL-2 family proteins aims to restore cancer cell death.
Purpose of the Study:
- To review the biology of the intrinsic apoptotic pathway and the roles of BCL-2 family proteins.
- To discuss BH3 profiling as a method to assess pathway dependency.
- To explore current and emerging therapeutic strategies targeting BCL-2 family proteins.
Main Methods:
- Review of existing literature on BCL-2 family biology and apoptosis.
- Analysis of historical and current BH3 mimetic drugs.
- Discussion of clinical trial data and expert opinion on targeted therapies.
Main Results:
- BH3 mimetics, such as venetoclax (ABT-199), are effective in treating hematologic and solid tumors.
- Understanding BCL-2 family interactions is crucial for developing targeted therapies.
- Ongoing research focuses on overcoming resistance and targeting other family members like MCL-1.
Conclusions:
- BH3 mimetics represent a significant advancement in cancer therapy, enhancing apoptosis in malignant cells.
- The clinical application of BCL-2 targeted agents is expanding, improving patient outcomes.
- Future directions include developing novel agents and combination therapies for broader efficacy.
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