Keywords
Diagnosis
Treatment
Biomarker
Submitted : 2024-08-26
Accepted : 2024-09-10
Published : 2024-09-25
Abstract
This review examines the role of ATM expression in head and neck squamous cell carcinoma (HNSCC). Analysis revealed significant overexpression of ATM in HNSCC cells compared to normal control samples, suggesting its involvement in cancer proliferation. ATM expression was notably upregulated across various clinical parameters, including different stages of cancer, racial groups, genders, and age groups, highlighting its role in cancer progression. Validation using the GEPIA2 tool confirmed strong ATM expression throughout all four stages of HNSCC, with the highest levels in stage II and the lowest in stage I. Promoter methylation analysis of ATM showed distinct patterns across different demographics and cancer stages, reinforcing its significance. The study also explored the relationship between ATM expression and patient outcomes using the KM plotter tool, finding that high ATM expression was associated with better overall survival (OS), while low ATM expression correlated with better disease-free survival (DFS). Genetic mutation analysis via cBioPortal identified minimal ATM mutations in HNSCC, including in-frame, splice, truncating, and missense mutations, suggesting their role in ATM dysregulation. The STRING tool was used to construct a protein-protein interaction (PPI) network, revealing that the ATM gene interacts with ten key genes (NBN, ATR, CHEK2, MDC1, MSH2, MSH6, MRE11, TP53, TP53BP1, BRCA1), indicating its involvement in various biological functions. Functional annotation of differentially expressed genes (DEGs) through the DAVID web server revealed their participation in critical biological processes, including double-strand break repair, cellular response to DNA damage, and DNA damage checkpoints. KEGG pathway analysis further linked DEGs to cellular senescence, platinum drug resistance, homologous recombination, p53 signaling, and the cell cycle, underscoring ATM’s multifaceted role in HNSCC.
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