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Updated: May 5, 2026

Evaluation of the Interplay Between the Complement Protein C1q and Hyaluronic Acid in Promoting Cell Adhesion
Published on: June 15, 2019
The role of complement in tumor growth
Ruben Pio1, Leticia Corrales, John D Lambris
1Oncology Division (CIMA), and Department of Biochemistry and Genetics (School of Science), University of Navarra, Pamplona, Spain, rpio@unav.es.
Complement activation, a key immune response, traditionally fights cancer. However, cancer cells exploit it, and complement may even promote tumor growth in chronic inflammation, requiring new therapeutic strategies.
Area of Science:
- Immunology
- Oncology
- Complement System
Background:
- The complement system is a crucial innate immune defense against foreign cells.
- Malignant cells can activate complement, which has been viewed as a tumor surveillance mechanism.
- Cancer cells develop inhibitory mechanisms to evade complement-mediated destruction, impacting immunotherapy.
Purpose of the Study:
- To review the dual role of complement activation in cancer immunity.
- To explore how complement contributes to tumor immune evasion and progression.
- To identify new therapeutic targets within the complement system for cancer treatment.
Main Methods:
- Review of existing clinical data and scientific literature.
- Analysis of complement's role in immunosurveillance and tumor escape.
- Examination of complement's function within the tumor microenvironment.
Main Results:
- Complement activation is observed in cancer patients.
- Cancer cells utilize complement pathways for protection and immune evasion.
- Emerging evidence indicates complement can promote tumor growth, especially with chronic inflammation.
Conclusions:
- Complement plays a complex, multifaceted role in cancer immunity.
- Understanding complement's pro-tumorigenic functions is critical for developing novel cancer therapies.
- Targeting complement pathways offers potential for improved cancer treatment strategies.
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