Multi-Gene Expression in Anthracosis of the Lungs as One of the Risk Factors for Non-Small Cell Lung Cancer

Document Type: Research Articles

Authors

1 Chronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.

2 Craniomaxillofacial Research Center, Tehran University of Medical Sciences,Tehran,Iran.

3 Oral and Maxillofacial Surgery Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.

4 Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.

5 Tobacco Prevention and Control Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRI TLD),Shahid Beheshti University of Medical Sciences, Tehran, Iran.

6 Tracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.

7 Department of Physiology, Faculty of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran.

8 Virology Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.

9 Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

Abstract

 
Background: Anthracosis of the lung occurs due to the deposition of carbon and silica in the mucosa and submucosa, manifested as black lesions. The association of anthracosis with lung cancer has remained to be clearly elucidated The current study aimed to assess the P16, CDH1 and LUNX genes expression level to evaluate the association of anthracotic lesions in the lungs with the occurrence of non-small cell lung cancer. Methods: Forty biopsy samples were taken from the center and 40 from the margins of black anthracotic lesions in the lungs; RNA was extracted from the samples and cDNA was synthesized. Real-time reverse-transcription polymerase chain reaction (RT-PCR) was performed to assess the expression of P16, CDH1 and LUNX genes. All steps were performed in triplicate. Results: A significant reduction in P16 gene expression was noted at the center compared to the margins of the lesions (P<0.001). expression level of CDH1 at the center of lesions was significantly lower than margins (P<0.001). However, LUNX gene had significantly higher expressionlevel at the center compared to margins (P<0.001). Conclusion: Decreased expression of P16 and CDH1 and increased expression of LUNX tumor genes were noted at the center of anthracotic lesions. Significant increase in expression of LUNX gene in NSCLC indicates an association between anthracosis and NSCLC, according to which, anthracotic patients may carry a high risk for NSCLC.

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