SWI/SNF chromatin remodeling complexes and cancer

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• The SWI/SNF chromatin remodeling complex plays a critical role in gene regulation.
• Mutations in SWI/SNF components, initially identified in pediatric rhabdoid tumors (SMARCB1), are implicated in various cancers.
• Over 20 SWI/SNF members have been linked to tumorigenesis.

Purpose of the Study:

• To review the role of SMARCB1 in cancer as a model for SWI/SNF complex alterations.
• To highlight the diverse spectrum of mutations in SWI/SNF members across different tumor types.
• To underscore the prevalence of SWI/SNF alterations in human malignancies.

Main Methods:

• Literature review of studies on SWI/SNF complex mutations in cancer.
• Analysis of identified mutations and deletions in SWI/SNF genes (SMARCB1, SMARCA4, SMARCE1, PBRM1).
• Examination of germline and somatic alterations, including copy number changes and epigenetic modifications.

Main Results:

• Germline mutations and copy number alterations in SWI/SNF genes predispose individuals to neoplasms.
• Somatic mutations, structural abnormalities, or epigenetic changes affecting SWI/SNF members occur in over 20% of malignancies.
• These alterations are observed in both pediatric and adult cancers, including solid tumors and hematologic disorders.

Conclusions:

• SMARCB1 mutations serve as a paradigm for understanding SWI/SNF complex involvement in cancer.
• Alterations in the SWI/SNF complex are a common feature across a broad range of human cancers.
• Targeting SWI/SNF pathways may offer new therapeutic strategies for various malignancies.