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Background

Lung cancer has the fastest increase in morbidity and mortality, and is one of the most threatening malignant tumors to human health and life. Both radiotherapy and targeted therapy are typical treatments after lung cancer surgery. Radiotherapy is a means of locally killing cancer lesions, and it plays an important role in the entire management of lung cancer. Gefitinib is one of the most commonly used targeted therapy drugs in the treatment of lung cancer. The purpose of this project is to explore the mechanism by which deacetylation of RBBP8 mediated by radiotherapy-promoting protein SIRT6 in lung adenocarcinoma enhances the sensitivity of targeted therapy.

Methods

In both the cell experiments and the animal experiments, the samples were divided into five groups: Model group, RT group, CT group, RT+CT group, and RT+CT+inhibitor group. The CCK8 method was used to detect the viability of each group of cells. The flow cytometry experiment was used to analyze the apoptotic characteristics of each group of cells. The scratch test was used to detect the migration ability of each group of cells. Transwell invasion test was used to determine the invasion ability of each group of cells. The lung tumor tissues of each group of mice were collected to analyze the tumor size, volume, and metastasis characteristics. The TUNEL experiment was used to detect the apoptosis characteristics of the cells in the lung cancer tissues of each group mice. Immunohistochemistry experiments were used to analyze the distribution and relative expression characteristics of protein SIRT6 in mouse lung cancer tissues. The colorimetric experiments were used to detect the activity of Caspase 3 and Caspase 8 in each group. Western blot method was used to detect the expression of SIRT6, RBBP8, and MYC in each group.

Results

In each experiment, the results of the experiment have mutually proven consistency, and there is no contradiction. In addition to the Model group, the other 4 groups used different treatment methods. The better the curative effect, the lower the cell viability of cancer cells and the higher the apoptotic ratio. This is reflected in the CCK8 test, flow cytometry analysis, cell scratch test, Transwell cell migration test, and TUNEL detection. At the same time, colorimetric detection and Western blot analysis also analyzed the levels of SIRT6, RBBP8 and other cancer-related proteins in each group at the molecular level, implying the importance of SIRT6 protein in the treatment process.

Conclusion

Our project has proved that radiotherapy can promote the protein SIRT6 to deacetylate RBBP8 proteins, and ultimately enhance targeted therapy drug sensitivity."xsd:string
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http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/author"Dong Z."xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/author"Cai Y."xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/author"Wang J."xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/author"Wu Q."xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/author"Sheng Z."xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/date"2022"xsd:gYear
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/name"Int J Immunopathol Pharmacol"xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/pages"3946320221130727"xsd:string
http://purl.uniprot.org/citations/36172813http://purl.uniprot.org/core/title"The mechanism of radiotherapy for lung adenocarcinoma in promoting protein SIRT6-mediated deacetylation of RBBP8 to enhance the sensitivity of targeted therapy."xsd:string
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