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Updated: Aug 10, 2026

Identifying Protein-protein Interaction Sites Using Peptide Arrays
Published on: November 18, 2014
Targeting protein-protein interactions in the BCL-2 family: opportunities for precision oncology
Vishnu Malakar1, Chandi C Malakar2, Pratap Chand Mali3
1Department of Pharmacology,, JSS College of Pharmacy, Ooty, 643001, Tamil Nadu, India.
Abstract:
Apoptosis plays a pivotal role in the biological process that responds to cellular oxidative stress and significantly contributes to cancer pathogenesis, thereby altering the efficacy of modern cytotoxic treatments. The B-cell lymphoma 2 (BCL-2) protein family exhibits both pro-apoptotic and anti-apoptotic activities that regulate the intrinsic apoptotic pathway. BCL-2 family members, including pro-apoptotic and pro-survival proteins, are highly expressed or dysregulated in cancer cells, thereby promoting tumor progression and therapeutic resistance. This review systematically summarizes the structural organization, molecular functions, and therapeutic significance of the BCL-2 family in cancer. Furthermore, we critically discuss the active role of the BCL-2 family in modulating apoptosis and evaluate recent advances in the development of BH3 mimetics (Venetoclax (ABT-199), Navitoclax (ABT-263), Obatoclax (GX15-070)) and other BCL-2-targeted therapies. The review also highlights emerging mechanisms of drug resistance, including compensatory MCL-1 overexpression, and discusses current combination therapeutic strategies to overcome resistance. The available preclinical and clinical evidence denotes the therapeutic potential of the BCL-2 family as a promising target for cancer treatment. The single- and combined therapy with Venetoclax, a selective BCL-2 BH3 mimetic, has demonstrated higher efficacy and improved safety compared with conventional therapies and has been successfully applied across distinct cancer types. Finally, we discuss current challenges, including resistance mechanisms and treatment-related toxicities, and outline future directions focusing on biomarker-guided patient stratification and next-generation BCL-2-targeted therapeutics.
Insights
The B-cell lymphoma 2 (BCL-2) family regulates apoptosis and impacts cancer. Targeting BCL-2 with drugs like Venetoclax shows promise for cancer treatment, despite challenges like drug resistance.
Area of Science:
- Oncology
- Molecular Biology
- Cell Death Research
Background:
- Apoptosis is crucial for cellular oxidative stress response and cancer development.
- The B-cell lymphoma 2 (BCL-2) protein family controls the intrinsic apoptotic pathway.
- Dysregulation of BCL-2 family proteins promotes tumor progression and treatment resistance.
Purpose of the Study:
- To review the structure, function, and therapeutic relevance of the BCL-2 family in cancer.
- To discuss BCL-2's role in apoptosis modulation and BH3 mimetic development.
- To explore resistance mechanisms and combination strategies for BCL-2-targeted therapies.
Main Methods:
- Systematic review of scientific literature.
- Analysis of structural and functional data of BCL-2 family proteins.
- Evaluation of preclinical and clinical data for BCL-2-targeted drugs.
Main Results:
- BCL-2 family proteins are key regulators of apoptosis and are frequently altered in cancer.
- BH3 mimetics, such as Venetoclax, demonstrate significant therapeutic potential.
- Venetoclax shows improved efficacy and safety in various cancer types, often in combination therapies.
Conclusions:
- The BCL-2 family represents a promising therapeutic target for cancer treatment.
- Venetoclax and other BH3 mimetics offer effective treatment options, but resistance mechanisms require further investigation.
- Future directions include biomarker-guided patient selection and development of next-generation BCL-2 inhibitors.
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