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Updated: Mar 17, 2026

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts
Published on: July 25, 2020
Targeting the mitogen-activated protein kinase pathway in low-grade serous carcinoma of the ovary
Jennifer McLachlan1, Martin Gore1, Susana Banerjee1
1Gynaecology Unit, The Royal Marsden NHS Foundation Trust, 203 Fulham Road, London, SW3 6JJ, UK.
Abstract:
Until recently, there has been little change in the management of epithelial ovarian cancer with the majority of women receiving identical systemic therapy, regardless of histological subtype. The heterogeneity of epithelial ovarian cancer is now well established, with distinct subtypes characterized by specific molecular alterations and patterns of clinical behavior. Low-grade serous carcinoma is a rare subtype associated with an indolent biological behavior and inherent resistance to chemotherapy. The mitogen-activated protein kinase pathway plays a prominent role in the pathogenesis of low-grade serous carcinoma, and provides an attractive target for novel therapeutic agents. Selumetinib, a MEK1/2 inhibitor, demonstrates promising efficacy in women with relapsed low-grade serous carcinoma, and further trials of MEK-inhibition are underway. Translational research will be essential to identify predictive biomarkers for this treatment approach.
Insights
Low-grade serous ovarian cancer, a rare subtype, is often resistant to chemotherapy. Selumetinib, a MEK1/2 inhibitor targeting the mitogen-activated protein kinase pathway, shows promise for treating this challenging cancer.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Epithelial ovarian cancer management has historically lacked subtype specificity.
- Tumor heterogeneity is recognized, with distinct molecular profiles and behaviors.
- Low-grade serous carcinoma (LGSC) is rare, indolent, and chemoresistant.
Purpose of the Study:
- To investigate novel therapeutic targets in LGSC.
- To evaluate the efficacy of MEK1/2 inhibition in LGSC.
Main Methods:
- Targeting the mitogen-activated protein kinase (MAPK) pathway.
- Utilizing selumetinib, a MEK1/2 inhibitor.
Main Results:
- Selumetinib demonstrates promising efficacy in relapsed LGSC.
- MEK-inhibition is a viable therapeutic strategy for LGSC.
Conclusions:
- Targeting the MAPK pathway offers a novel approach for LGSC treatment.
- Further clinical trials and biomarker research are warranted for MEK-inhibitor therapy.
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