Tight Junction Protein 1 Dysfunction Contributes to Cell Motility in Bladder Cancer

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Bladder cancer presents a significant mortality risk, especially in advanced stages.
• Effective biomarkers are crucial for improving patient survival rates.
• The role of Tight Junction Protein 1 (TJP1) in bladder cancer progression is not well understood.

Purpose of the Study:

• To investigate the role of TJP1 and miR-455-5p in bladder cancer.
• To explore the relationship between TJP1 expression and clinical outcomes.
• To elucidate the regulatory mechanism between miR-455-5p and TJP1.

Main Methods:

• Analysis of TJP1 and miR-455-5p expression using The Cancer Genome Atlas database.
• Assessment of TJP1 and miR-455-5p function in T24 bladder cancer cells via gene silencing and mimic transfection.
• Bioinformatic analysis to identify regulatory interactions.

Main Results:

• High TJP1 expression correlated significantly with poor lymph node metastasis (pN stage).
• TJP1 knockdown reduced bladder cancer cell growth and invasion.
• miR-455-5p directly targets TJP1's 3' UTR, suppressing its expression.
• miR-455-5p ectopic expression inhibited bladder cancer cell migration, invasion, and proliferation.

Conclusions:

• The miR-455-TJP1 axis plays a critical role in bladder cancer cell growth and metastasis.
• Dysregulation of this axis contributes to bladder cancer progression.
• The miR-455-TJP1 axis represents a potential therapeutic target and biomarker for bladder cancer.