14 June 2017 : Clinical Research
CLDN1 Increases Drug Resistance of Non-Small Cell Lung Cancer by Activating Autophagy via Up-Regulation of ULK1 PhosphorylationZhenhuan Zhao1ACEF, Jing Li1ABCE, Yan Jiang2DFG, Wen Xu1CDE, Xin Li1ABE, Weili Jing2BEFG*
Med Sci Monit 2017; 23:2906-2916
BACKGROUND: The aim of this study was to investigate the expression of CLDN1 in non-small cell lung cancer (NSCLC) and its mechanism of action in cisplatin resistance.
MATERIAL AND METHODS: A total of 55 patients with NSCLC admitted to our hospital between October 2013 and October 2015 were included. NSCLC tissues and tumor-adjacent tissues (≥5 cm from tumor edge) were collected. Among the 55 patients, 37 had adenocarcinoma and 18 had squamous cell carcinoma. Quantitative real-time polymerase chain reaction was used to determine mRNA expression, and protein expression was examined using Western blotting. CCK-8 assay was used to determine cell proliferation and Transwell assay was used to detect migration and invasion of the cells. Confocal microscopy was used to observe autophagosomes.
RESULTS: Increased CLDN1 expression promoted the development and metastasis of NSCLC. CLDN1 expression in A549/CDDP cells was up-regulated at both transcriptional and translational levels. Reduced CLDN1 expression decreased the drug resistance, proliferation, migration, and invasion abilities of A549/CDDP cells. Decreased CLDN1 expression promoted the apoptosis of A549/CDDP cells. CLDN1 enhanced CDDP drug resistance of A549 cells by activating autophagy. CLDN1 promoted the autophagy of A549 cells by up-regulating the phosphorylation level of ULK1.
CONCLUSIONS: The present study demonstrates that expression of CLDN1 in NSCLC is up-regulated and it is correlated with clinicopathological features. CLDN1 activates autophagy through up-regulation of ULK1 phosphorylation and promotes drug resistance of NSCLC cells to CDDP.
25 October 2021 : EditorialEditorial: The 2021 European Society of Cardiology (ESC) Guidelines on the Real-World Prevention of Atherosclerotic Cardiovascular Disease (ASCVD)
Med Sci Monit 2021; 27:e935172
22 October 2021 : Clinical ResearchA Novel Method for the Production of an Autologous Anti-Inflammatory and Anti-Catabolic Product (Cytorich) ...
Med Sci Monit In Press; DOI: 10.12659/MSM.934365
11 October 2021 : Clinical ResearchClinical Features and Temporal Lung Radiographic Changes in 25 Patients Recovering from COVID-19 Pneumonia:...
Med Sci Monit In Press; DOI: 10.12659/MSM.933381
08 September 2021 : Clinical ResearchAcceptance of COVID-19 Vaccination and Its Associated Factors Among Cancer Patients Attending the Oncology ...
Med Sci Monit In Press; DOI: 10.12659/MSM.932788
27 Oct 2021 : Clinical ResearchUse of the Braden Scale to Predict Injury Severity in Mass Burn Casualties
Med Sci Monit In Press; DOI: 10.12659/MSM.934039
27 Oct 2021 : Database AnalysisLow Expression of Long Noncoding RNA SLC26A4 Antisense RNA 1 Is an Independent Prognostic Biomarker and Cor...
Med Sci Monit In Press; DOI: 10.12659/MSM.934522
27 Oct 2021 : Database AnalysisA Novel Predictive Model Incorporating Ferroptosis-Related Gene Signatures for Overall Survival in Patients...
Med Sci Monit In Press; DOI: 10.12659/MSM.934050
Most Viewed Current Articles
20 Mar 2020 : Clinical ResearchSocial Capital and Sleep Quality in Individuals Who Self-Isolated for 14 Days During the Coronavirus Diseas...
Med Sci Monit 2020; 26:e923921
15 Apr 2020 : Clinical ResearchPsychological Impact and Coping Strategies of Frontline Medical Staff in Hunan Between January and March 20...
Med Sci Monit 2020; 26:e924171
05 May 2020 : Review articleAn Evidence Based Perspective on mRNA-SARS-CoV-2 Vaccine Development
Med Sci Monit 2020; 26:e924700