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Tumor escape from immune surveillance
R T Costello1, J A Gastaut, D Olive
1Laboratory of Tumor Immunology, Institute Paoli-Calmettes, Marseille, France.
Archivum Immunologiae Et Therapiae Experimentalis
|April 15, 1999
Summary
Cancer cells evade immune surveillance through various mechanisms, hindering effective anti-tumor responses. Strategies to restore tumor immunogenicity offer promising therapeutic avenues for immune manipulation.
Area of Science:
- Immunology
- Oncology
- Cancer Research
Background:
- Efficient anti-tumor immune responses are crucial for cancer control.
- Neoplastic cells employ diverse strategies to evade immune surveillance, complicating therapeutic interventions.
Purpose of the Study:
- To discuss tumor evasion mechanisms and explore therapeutic possibilities for immune manipulation.
- To highlight strategies for restoring tumor immunogenicity and enhancing anti-cancer immunity.
Main Methods:
- Review of known tumor immune evasion strategies.
- Discussion of in vitro studies demonstrating tumor immunogenicity restoration.
Main Results:
- Tumor cells escape immune recognition via absent tumor antigens, weak Major Histocompatibility Complex (MHC) expression, and defective co-stimulatory molecule ligands, inducing tolerance.
- Tumor cells can inactivate effector T lymphocytes through inhibitory cytokines, apoptosis, or functional inactivation.
- Natural killer (NK) cells target tumor cells lacking MHC class I molecules.
Conclusions:
- The multifaceted nature of tumor immune evasion poses significant challenges to the adaptive immune system.
- Restoring tumor immunogenicity through methods like CD40 stimulation or cytokine treatment presents promising therapeutic strategies.