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Updated: Jun 17, 2026

Evaluating the Angiogenetic Properties of Ovarian Cancer Stem-Like Cells using the Three-Dimensional Co-Culture System, NICO-1
Published on: December 5, 2020
Blocking ovarian cancer progression by targeting tumor microenvironmental leukocytes
Juan R Cubillos-Ruiz1, Melanie Rutkowski, Jose R Conejo-Garcia
1Departments of Microbiology and Immunology, Lebanon, NH, USA.
Abstract:
Current therapies for metastatic ovarian carcinoma are based on surgical debulking followed by chemotherapy. After more than three decades implementing treatments that selectively target the tumor cell, the 5-year survival rate for metastatic ovarian cancer patients is still lower than 30%. Novel strategies are therefore urgently needed to complement classical treatments for this malignancy. Recently, leukocytes in the ovarian cancer microenvironment such as regulatory T cells and immature pro-angiogenic/tolerogenic myeloid cells have been demonstrated to play a fundamental role in tumor progression. This review focuses on our recent understanding of the potential of eliminating and/or modulating the phenotype of these leukocytes in vivo and in situ as a novel intervention to complement standard ovarian cancer treatments. The significant effects of targeting these crucial microenvironmental players on cancer vascularization, local tumor growth, distal metastatic spreading and spontaneous anti-tumor immune responses are discussed.
Insights
Targeting tumor-infiltrating leukocytes, like regulatory T cells, offers a novel strategy to improve survival rates for metastatic ovarian cancer patients. Modulating these cells complements chemotherapy and surgery for better outcomes.
Area of Science:
- Oncology
- Immunology
- Cancer Biology
Background:
- Current metastatic ovarian carcinoma treatments (debulking surgery + chemotherapy) yield poor 5-year survival rates (<30%).
- Tumor-infiltrating leukocytes, including regulatory T cells and myeloid cells, are critical drivers of ovarian cancer progression.
- Novel therapeutic strategies are essential to overcome treatment resistance and improve patient outcomes.
Purpose of the Study:
- To review the potential of eliminating or modulating leukocytes within the ovarian cancer microenvironment.
- To explore novel interventions that complement standard ovarian cancer therapies.
- To discuss the impact of targeting these immune cells on tumor progression and anti-tumor immunity.
Main Methods:
- Literature review focusing on recent advancements in understanding leukocyte roles in ovarian cancer.
- Analysis of in vivo and in situ strategies for leukocyte modulation.
- Discussion of the effects of targeting microenvironmental leukocytes on cancer hallmarks.
Main Results:
- Leukocytes significantly influence ovarian cancer vascularization, local growth, and metastatic spread.
- Modulating these immune cells can potentially enhance spontaneous anti-tumor immune responses.
- Targeting leukocytes represents a promising complementary approach to existing treatments.
Conclusions:
- Eliminating or modulating tumor-associated leukocytes is a viable novel strategy for metastatic ovarian cancer.
- This approach can impact tumor vascularization, growth, metastasis, and immune surveillance.
- Targeting the tumor microenvironment's immune cells offers a promising avenue to improve therapeutic efficacy.
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