Overexpression and biological function of TMEM48 in non-small cell lung carcinoma

Area of Science:

• Molecular Biology
• Oncology
• Cell Biology

Background:

• Nuclear pore complexes (NPCs) are vital for cellular function, and their components are implicated in various cancers.
• Transmembrane protein 48 (TMEM48) is a nuclear pore complex protein with a poorly understood role in malignancies.

Purpose of the Study:

• To investigate the expression and functional role of TMEM48 in non-small cell lung carcinoma (NSCLC).
• To evaluate TMEM48 as a potential prognostic biomarker and therapeutic target in NSCLC.

Main Methods:

• Quantitative analysis of TMEM48 expression in NSCLC tissues versus normal tissues.
• TMEM48 knockdown in NSCLC cell lines (A549, H1299) followed by proliferation, cell cycle, apoptosis, and migration assays.
• Gene Set Enrichment Analysis (GSEA) to identify associated pathways.
• Real-time PCR and Western blot to assess gene and protein expression.
• In vivo tumorigenicity assays in nude mice.

Main Results:

• TMEM48 expression was significantly higher in NSCLC tissues and correlated with advanced stage, metastasis, and poorer survival.
• TMEM48 knockdown inhibited NSCLC cell proliferation, induced G1 cell cycle arrest, and promoted apoptosis.
• GSEA revealed a correlation between TMEM48 expression and cell cycle pathways.
• Knockdown of TMEM48 reduced the expression of key cell cycle and DNA replication genes (Cyclin B1, CDK1, CDC6, PCNA, RCF4).
• TMEM48 inhibition repressed cell adhesion, migration, invasion, and in vivo tumor growth.

Conclusions:

• TMEM48 plays a critical role in NSCLC progression by regulating cell cycle, proliferation, apoptosis, and metastasis.
• TMEM48 is a potential prognostic biomarker for NSCLC.
• Targeting TMEM48 represents a promising therapeutic strategy for NSCLC.