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An Orthotopic Model of Serous Ovarian Cancer in Immunocompetent Mice for in vivo Tumor Imaging and Monitoring of Tumor Immune Responses
Published on: November 28, 2010
Glutathione in Ovarian Cancer: A Double-Edged Sword
Sofia C Nunes1,2, Jacinta Serpa3,4
1Centro de Estudos de Doenças Crónicas (CEDOC), NOVA Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Campo Mártires da Pátria 130, 1169-056 Lisboa, Portugal. sofia.nunes@nms.unl.pt.
Abstract:
Glutathione (GSH) has several roles in a cell, such as a reactive oxygen species (ROS) scavenger, an intervenient in xenobiotics metabolism and a reservoir of cysteine. All of these activities are important in the maintenance of normal cells homeostasis but can also constitute an advantage for cancer cells, allowing disease progression and resistance to therapy. Ovarian cancer is the major cause of death from gynaecologic disease and the second most common gynaecologic malignancy worldwide. In over 50 years, the overall survival of patients diagnosed with epithelial ovarian cancer has not changed, regardless of the efforts concerning early detection, radical surgery and new therapeutic approaches. Late diagnosis and resistance to therapy are the main causes of this outcome, and GSH is profoundly associated with chemoresistance to platinum salts, which, together with taxane-based chemotherapy and surgery, are the main therapy strategies in ovarian cancer treatment. Herein, we present some insights into the role of GSH in the poor prognosis of ovarian cancer, and also point out how some strategies underlying the dependence of ovarian cancer cells on GSH can be further used to improve the effectiveness of therapy.
Insights
Glutathione (GSH) supports ovarian cancer progression and chemoresistance. Targeting GSH dependence may improve treatment effectiveness for this deadly disease.
Area of Science:
- Biochemistry
- Oncology
- Cell Biology
Background:
- Glutathione (GSH) is vital for cellular homeostasis, acting as a reactive oxygen species (ROS) scavenger, aiding xenobiotic metabolism, and serving as a cysteine reservoir.
- These functions, while essential for normal cells, can be exploited by cancer cells, promoting disease progression and therapeutic resistance.
- Epithelial ovarian cancer remains a leading cause of gynecologic cancer mortality worldwide, with stagnant survival rates over the past five decades.
Purpose of the Study:
- To elucidate the multifaceted role of glutathione (GSH) in the poor prognosis of ovarian cancer.
- To explore therapeutic strategies that leverage ovarian cancer cells' dependence on GSH to enhance treatment efficacy.
Main Methods:
- Literature review and analysis of existing research on GSH metabolism and its implications in ovarian cancer.
- Examination of the biochemical pathways linking GSH to cancer cell survival, proliferation, and drug resistance.
- Identification of potential therapeutic targets based on GSH-dependent mechanisms in ovarian cancer.
Main Results:
- GSH significantly contributes to chemoresistance in ovarian cancer, particularly against platinum-based therapies, a cornerstone of current treatment regimens.
- Elevated GSH levels in ovarian cancer cells are associated with increased disease progression and reduced patient survival.
- Ovarian cancer cells exhibit a heightened dependence on GSH for survival and proliferation, creating vulnerabilities exploitable for therapeutic intervention.
Conclusions:
- Glutathione plays a critical role in the progression and therapeutic resistance of ovarian cancer, contributing to poor patient outcomes.
- Targeting GSH-dependent pathways presents a promising strategy to overcome chemoresistance and improve the effectiveness of ovarian cancer treatments.
- Further research into modulating GSH levels or inhibiting GSH-related enzymes could lead to novel therapeutic approaches for ovarian cancer.
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