ArticleThoracic cancer2023
Characterization and mechanisms of radioresistant lung squamous cell carcinoma cell lines.
Article in Thoracic cancer, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 4 citations in OpenAlex.
- Role of DDX39A in modulating the tumor progression and radiosensitivity in esophageal squamous cell carcinoma.Cellular oncology (Dordrecht, Netherlands) · 2026Article
- Anoikis-Related Genes Signature Contributes to Predicting Prognosis and Response to Immunotherapy in Lung Squamous Cell Carcinoma.Medical science monitor : international medical journal of experimental and clinical research · 2026Article
- The radioresistance of clinically relevant radioresistant cell-derived tumors is determined by the cancer cells themselves, rather than by the surrounding stromal cells.Journal of dental sciences · 2026Article
- Deciphering Radiotherapy Resistance: A Proteomic Perspective.Proteomes · 2025Review
- Bioinformatics Identification and Experimental Validation of a Prognostic Model for the Survival of Lung Squamous Cell Carcinoma Patients.Biochemical genetics · 2025Article
- Characterization and mechanisms of radioresistant lung squamous cell carcinoma cell lines.Thoracic cancer · 2023Article
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Authors and funding
5 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundRadiotherapy is an important clinical treatment for patients with lung squamous cell carcinoma (LUSC), and resistance to radiotherapy is an important cause of recurrence and metastasis in LUSC. The aim of this study was to establish and explore the biological characteristics of radioresistant LUSC cells. MATERIALS AND
methodsThe LUSC cell lines NCI-H2170 and NCI-H520 were irradiated (4 Gy × 15Fraction). Radiosensitivity, cell apoptosis, cell cycle, and DNA damage repair were measured by clonogenic survival assay, flow cytometry, immunofluorescence for γ-H2AX foci, and Comet assay, respectively. Activation of p-ATM(Ser1981), p-CHK2(Th68), p-DNA-PKcs (Ser2056), and Ku70/Ku80 was measured by western blot. Proteomics was used to explore the differential genes and enriched signaling pathways between radioresistant cell lines and parental lines. In vivo nude mouse xenograft experiments further verified the feasibility of the radioresistant LUSC cell lines.
resultsAfter fractionated irradiation (total dose of 60 Gy), radioresistant cells had decreased radiosensitivity, increased G0/G1 phase arrest, enhanced DNA damage repair ability, and through the ATM/CHK2 and DNA-PKcs/Ku70 pathways regulated double strands break. The upregulated differential genes in radioresistant cell lines were mainly enriched in biological pathways such as cell migration and extracellular matrix (ECM)-receptor interaction. In vivo verification of decreased radiosensitivity of radioresistant cells
conclusionsRadioresistant LUSC cell lines were established by fractional radiotherapy, which regulates IR-induced DNA damage repair through ATM/CHK2 and DNA-PKcs/Ku70. Tandem Mass Tags (TMT) quantitative proteomics found that the biological process pathway of cell migration and ECM-receptor interaction are upregulated in LUSC radioresistant cells.
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