SIRT4 expression in laryngeal squamous cell carcinoma

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• Sirtuin 4 (SIRT4) dysregulation is implicated in various cancers.
• Limited data exists on SIRT4 expression and its role in laryngeal squamous cell carcinoma (LSCC).

Purpose of the Study:

• To investigate SIRT4 expression levels in LSCC tissues.
• To analyze the clinical significance of SIRT4 in LSCC.
• To explore the functional role of SIRT4 in LSCC cell behavior.

Main Methods:

• RT-qPCR, immunoblotting, and immunohistochemical staining were used to quantify SIRT4 expression in 168 LSCC tissue pairs.
• In vitro experiments assessed the effects of SIRT4 knockdown and overexpression on LSCC cell proliferation and migration.
• Survival analysis was performed to determine the prognostic value of SIRT4.

Main Results:

• SIRT4 expression was significantly lower in LSCC tissues compared to normal adjacent tissues.
• Low SIRT4 expression correlated with advanced histological grade, T classification, clinical stage, lymph node metastasis, and recurrence.
• SIRT4 knockdown enhanced LSCC cell proliferation and migration, while overexpression inhibited these processes.
• SIRT4 protein expression was an independent predictor of disease-free survival (DFS) and overall survival (OS).

Conclusions:

• SIRT4 is downregulated in LSCC and associated with more aggressive tumor characteristics.
• Reduced SIRT4 expression predicts a poorer prognosis and reduced survival rates in LSCC patients.
• SIRT4 may function as a tumor suppressor in laryngeal squamous cell carcinoma.