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Radiosensitivity of Cancer Stem Cells in Lung Cancer Cell Lines
Published on: August 21, 2019
Molecular mechanisms of cancer cells survival
1Institute of Molecular Biology, Bulgarian Academy of Sciences, Sofia, Bulgaria.
Abstract:
It is of great interest for cancer therapy to elucidate and overcome the mechanisms that cancer cells develop to fight back the defense systems of the organism and anticancer treatments. The anticancer defense of the organism consists of four processes: 1. Activity of the cellular immunity; 2. Production of cytokines; 3. Activation of tumor-suppressor genes; 4. Blocking of the enzyme telomerase. Several molecular mechanisms that cancer cells develop for survival are described: 1. Reactivation of the telomerase; 2. Suppression of apoptosis; 3. Elimination of effector cells; 4. Shedding of soluble receptors; 5. Neutralization of tumor-suppressor genes; 6. Developing of a drug efflux pump; 7. Neoangiogenesis; 8. Overcoming and utilizing hypoxia; 9. Other rescue mutations; 10 Access- restriction factors.Some new approaches for overcoming the survival mechanisms of cancer cells are briefly outlined.
Insights
Cancer cells evade immune defense and treatments through survival mechanisms like telomerase reactivation and apoptosis suppression. Understanding these pathways is key to developing effective cancer therapies.
Area of Science:
- Oncology
- Cancer Biology
- Immunology
Background:
- Cancer cells develop sophisticated mechanisms to evade the host's natural defenses and therapeutic interventions.
- Understanding these cancer survival strategies is crucial for advancing cancer treatment.
- The body's anticancer defenses involve cellular immunity, cytokine production, tumor-suppressor genes, and telomerase inhibition.
Purpose of the Study:
- To elucidate the molecular mechanisms cancer cells employ for survival.
- To outline novel therapeutic approaches to overcome cancer cell resistance.
Main Methods:
- Review and synthesis of established and emerging cancer survival mechanisms.
- Exploration of molecular pathways utilized by cancer cells, including telomerase reactivation, apoptosis suppression, and drug resistance.
- Brief outline of potential therapeutic strategies targeting these mechanisms.
Main Results:
- Cancer cells employ at least ten distinct molecular mechanisms for survival.
- Key mechanisms include telomerase reactivation, apoptosis suppression, immune evasion, and neoangiogenesis.
- Hypoxia and drug efflux pumps are also critical for cancer cell survival.
Conclusions:
- Overcoming cancer requires targeting the multifaceted survival mechanisms employed by malignant cells.
- New therapeutic strategies are being developed to counteract cancer's resistance pathways.
- Further research into these mechanisms will pave the way for more effective cancer therapies.
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