p53 mutations in oral cavity carcinoma

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Head and neck squamous cell carcinoma (HNSCC) encompasses various SCCs from the oral cavity, nasal cavity, pharynx, and larynx.
• Oral cavity SCC (OCSCC) incidence is increasing, linked to persistent High-Risk Human Papilloma Virus (HR HPV) infection, smoking, and alcohol consumption.
• Genetic and epigenetic alterations, including chromosomal abnormalities and gene mutations, drive the malignant transformation of squamous epithelia.

Purpose of the Study:

• To investigate the role of p53 gene deregulation, with a specific focus on its mutation status, in oral cavity squamous cell carcinoma (OCSCC).

Main Methods:

• Analysis of gross chromosomal alterations (polysomy, aneuploidy).
• Examination of specific gene aberrations (amplifications, deletions, point mutations).
• Assessment of epigenetic modifications (promoter methylations, miRNA deregulations).

Main Results:

• Inactivated p53 is frequently observed in OCSCC, leading to cell cycle dysregulation.
• Aberrant p53 overexpression in OCSCC tissues often results from point mutations or deletions.
• The p53 gene (17p13.1) is a crucial regulator of genomic stability, function, and homeostasis.

Conclusions:

• P53 gene deregulation, especially its mutation status, is a significant factor in the pathogenesis of OCSCC.
• Understanding p53 alterations is key to comprehending OCSCC development.
• Further research into p53's role may offer therapeutic targets for OCSCC.