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Published on: August 17, 2010
SWI/SNF Complexes in Ovarian Cancer: Mechanistic Insights and Therapeutic Implications
Takeshi Fukumoto1, Elizabeth Magno1, Rugang Zhang2
1Gene Expression and Regulation Program, The Wistar Institute, Philadelphia, Pennsylvania.
Abstract:
Ovarian cancer remains the most lethal gynecologic malignancy in the developed world. Despite the unprecedented progress in understanding the genetics of ovarian cancer, cures remain elusive due to a lack of insight into the mechanisms that can be targeted to develop new therapies. SWI/SNF chromatin remodeling complexes are genetically altered in approximately 20% of all human cancers. SWI/SNF alterations vary in different histologic subtypes of ovarian cancer, with ARID1A mutation occurring in approximately 50% of ovarian clear cell carcinomas. Given the complexity and prevalence of SWI/SNF alterations, ovarian cancer represents a paradigm for investigating the molecular basis and exploring therapeutic strategies for SWI/SNF alterations. This review discusses the recent progress in understanding SWI/SNF alterations in ovarian cancer and specifically focuses on: (i) ARID1A mutation in endometriosis-associated clear cell and endometrioid histologic subtypes of ovarian cancer; (ii) SMARCA4 mutation in small cell carcinoma of the ovary, hypercalcemic type; and (iii) amplification/upregulation of CARM1, a regulator of BAF155, in high-grade serous ovarian cancer. Understanding the molecular underpinning of SWI/SNF alterations in different histologic subtypes of ovarian cancer will provide mechanistic insight into how these alterations contribute to ovarian cancer. Finally, the review discusses how these newly gained insights can be leveraged to develop urgently needed therapeutic strategies in a personalized manner.
Insights
SWI/SNF chromatin remodeling complexes are altered in ovarian cancer, particularly ARID1A mutations in clear cell subtypes. Understanding these alterations aids developing targeted ovarian cancer therapies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Ovarian cancer is a lethal gynecologic malignancy with limited therapeutic options.
- SWI/SNF chromatin remodeling complexes are frequently altered in various cancers, including ovarian cancer.
- Specific SWI/SNF alterations vary by histologic subtype, impacting disease mechanisms.
Purpose of the Study:
- To review recent advancements in understanding SWI/SNF alterations in ovarian cancer.
- To focus on specific SWI/SNF alterations (ARID1A, SMARCA4, CARM1) in distinct ovarian cancer subtypes.
- To explore how these insights can inform personalized therapeutic strategies.
Main Methods:
- Literature review of recent progress in SWI/SNF alterations in ovarian cancer.
- Focus on genetic alterations (mutation, amplification/upregulation) in specific genes.
- Analysis of SWI/SNF complex roles in different ovarian cancer histologic subtypes.
Main Results:
- ARID1A mutations are prevalent in endometriosis-associated clear cell and endometrioid ovarian cancers.
- SMARCA4 mutations are associated with small cell carcinoma of the ovary, hypercalcemic type.
- CARM1 amplification/upregulation is observed in high-grade serous ovarian cancer, affecting BAF155.
Conclusions:
- SWI/SNF alterations provide mechanistic insights into ovarian cancer development across subtypes.
- Understanding these molecular underpinnings is crucial for developing targeted therapies.
- Personalized therapeutic strategies can be developed based on specific SWI/SNF alterations.
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