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Published on: June 9, 2023
MYBL2 amplification in breast cancer: Molecular mechanisms and therapeutic potential
Rachel Bayley1, Ciara Ward1, Paloma Garcia1
1Institute of Cancer and Genomic Science, College of Medical and Dental Sciences, University of Birmingham, UK.
Abstract:
The MYBL2 gene, also known as B-MYB, is essential to regulate vital cellular processes including cell proliferation, differentiation and DNA repair. Changes in these pathways can facilitate cancer development and as such targeting these processes represent an effective method to treat multiple cancer types. Alterations in gene expression have been identified in cancer cells including changes in MYBL2, which appears to be of particular significance in breast cancer (BC) patients. Upregulation of MYBL2 in BC can occur via multiple mechanisms, including changes in regulation by micro RNAs, amplification of the 20q13 gene coding region and single nucleotide polymorphisms in the MYBL2 gene itself or associated genes. Evidence from multiple studies suggests MYBL2 expression could be used as a biomarker for disease severity in BC patients, which could identify those who require a more targeted treatment approach to prevent disease recurrence. In fact, high MYBL2 expression correlates with BC metastasis, worse relapse free survival and shorter overall survival, providing strong evidence that upregulation of MYBL2 functions contributes to more aggressive disease. This review summarises the significance of amplified MYBL2 expression to the development and pathogenesis of BC and suggests ways to target this multifunctional protein as an effective treatment to prevent disease recurrence.
Insights
The MYBL2 gene, or B-MYB, drives cancer growth. Targeting its increased expression in breast cancer (BC) may offer new treatment strategies and improve patient survival outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MYBL2 (B-MYB) is crucial for cell proliferation, differentiation, and DNA repair.
- Dysregulation of these cellular processes, including MYBL2 gene expression, is linked to cancer development.
- MYBL2 alterations are particularly significant in breast cancer (BC) pathogenesis.
Purpose of the Study:
- To review the role of amplified MYBL2 expression in breast cancer development and progression.
- To explore MYBL2 as a potential biomarker for disease severity and treatment targeting in BC.
- To discuss therapeutic strategies targeting MYBL2 for preventing BC recurrence.
Main Methods:
- Literature review summarizing existing studies on MYBL2 in breast cancer.
- Analysis of mechanisms leading to MYBL2 upregulation in BC (microRNA regulation, gene amplification, SNPs).
- Correlation analysis of MYBL2 expression with clinical outcomes (metastasis, survival).
Main Results:
- High MYBL2 expression is associated with increased BC metastasis and poorer relapse-free and overall survival.
- MYBL2 upregulation contributes to more aggressive breast cancer phenotypes.
- MYBL2 amplification at 20q13 and altered microRNA regulation are key mechanisms in BC.
Conclusions:
- Amplified MYBL2 expression is a significant driver of breast cancer development and progression.
- MYBL2 serves as a potential biomarker for identifying aggressive BC and guiding targeted therapies.
- Targeting MYBL2 offers a promising therapeutic avenue to combat breast cancer recurrence.
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