Carcinogenesis, Teratogenesis & Mutagenesis ›› 2024, Vol. 36 ›› Issue (5): 333-341.doi: 10.3969/j.issn.1004-616x.2024.05.001

   

The combined effect and clinical value of cytoskeletal proteins MYH9 and Palladin in lung cancer

LIU Shiya, CHEN Meng, SHEN Gaigai, CAO Yuanting, SUN Lixin, RAN Yuliang   

  1. State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
  • Received:2024-07-23 Revised:2024-08-29 Published:2024-10-15

Abstract: OBJECTIVE: This study aimed to investigate the combined effects and clinical value of the cytoskeletal proteins MYH9 and Palladin on prognosis and malignant phenotypes in lung cancer. METHODS: Transcriptomic data of lung cancer,along with relevant clinical information,were downloaded from The Cancer Genome Atlas (TCGA) database. Bioinformatics analyses were conducted to assess the influence of MYH9 and Palladin on lung cancer prognosis and clinical staging,and to further analyze their combined effects on lung cancer prognosis. NCI-H460 cells with double and single knockdowns of MYH9 and Palladin were constructed. The effects of these gene knockdowns on lung cancer cell proliferation,drug resistance,migration,invasion,and self-renewal were evaluated using the CCK-8 assay,transwell assays,and methylcellulose sphere formation assay,respectively. Finally,the expression of MYH9 and Palladin in lung cancer and their influence on patient prognosis were further verified by tissue microarray. RESULTS: The analysis of biological information revealed that MYH9 and Palladin were markedly expressed in lung cancer tissues. Patients in the high expression group of MYH9 and Palladin exhibited a worse prognosis and clinical stage compared to those in the low expression group. Furthermore,the combined high expression group demonstrated the poorest prognosis for lung cancer patients (P<0.01). Results from the cell cuture experiment demonstrated that the proliferation,drug resistance,migration,invasion,and self-renewal ability of lung cancer cells in the bimolecular knockout group were significantly lower than those in the single-molecule knockout group and the control cells (P<0.01). Results from the tissue microarray further confirmed that MYH9 and Palladin were highly expressed in lung cancer tissues in comparison to adjacent paracancerous tissues. In comparison to the low expression group,the prognosis of lung cancer patients in the high expression group of MYH9 and Palladin was worse,and the bimolecular combination of high expression group had a more significant effect on the clinical prognosis of lung cancer patients. CONCLUSION: The combined effect of MYH9 and Palladin on clinical prognosis in lung cancer was more pronounced than their individual effects. Additionally,their combined impact on stemness-related characteristics in lung cancer cells was significantly greater than that of either MYH9 or Palladin alone. These findings suggest that MYH9 and Palladin could potentially serve as combined therapeutic targets for non-small cell lung cancer.

Key words: MYH9, Palladin, lung cancer, stemness-related characteristics, combined effect

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