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Updated: Mar 17, 2026

Radiosensitivity of Cancer Stem Cells in Lung Cancer Cell Lines
Published on: August 21, 2019
The cancer stem-cell signaling network and resistance to therapy
A Carnero1, Y Garcia-Mayea2, C Mir2
1Instituto de Biomedicina de Sevilla (IBIS/HUVR/CSIC/Universidad de Sevilla), Molecular Biology of Cancer Group, Oncohematology and Genetic Department, Campus HUVR, Edificio IBIS, Avda. Manuel Siurot s/n. 41013, Sevilla, Spain.
Abstract:
The study of cancer stem cells (CSCs) has shown that tumors are driven by a subpopulation of self-renewing CSCs that retain the capacity to engender the various differentiated cell populations that form tumors. The characterization of CSCs has indicated that CSCs are remarkably resistant to conventional radio- and chemo-therapy. Clinically, the remaining populations of CSC are responsible for metastasis and recurrence in patients with cancer, which can lead to the disease becoming chronic and incurable. Therefore, the elimination of CSCs is an important goal of cancer treatments. Furthermore, CSCs are subject to strong regulation by the surrounding microenvironment, which also impacts tumor responses. In this review, we discuss the mechanisms by which pathways that are defective in CSCs influence ultimately therapeutic and clinical outcomes.
Insights
Cancer stem cells (CSCs) drive tumor growth and resist therapy, causing metastasis and recurrence. Targeting CSCs and their microenvironment is crucial for effective cancer treatment and improved clinical outcomes.
Area of Science:
- Oncology
- Cancer Biology
- Cellular Therapeutics
Background:
- Tumors are driven by cancer stem cells (CSCs), a subpopulation with self-renewal capacity.
- CSCs are inherently resistant to conventional radio- and chemotherapy.
- Residual CSCs are linked to cancer metastasis, recurrence, and treatment failure.
Purpose of the Study:
- To review the mechanisms of cancer stem cell regulation.
- To discuss how CSC pathways impact therapeutic and clinical outcomes.
- To highlight the importance of targeting CSCs for cancer treatment.
Main Methods:
- Literature review of cancer stem cell research.
- Analysis of CSC characteristics and resistance mechanisms.
- Discussion of CSC-microenvironment interactions.
Main Results:
- CSCs possess unique self-renewal and differentiation capabilities.
- CSCs exhibit significant resistance to standard cancer therapies.
- The tumor microenvironment actively influences CSC behavior and treatment response.
Conclusions:
- Eliminating CSCs is a critical goal for successful cancer therapy.
- Understanding CSC regulatory pathways is key to improving treatment efficacy.
- Targeting CSCs and their microenvironment holds promise for overcoming therapeutic resistance and preventing recurrence.
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