CLDN6: From Traditional Barrier Function to Emerging Roles in Cancers

Area of Science:

• Molecular Biology
• Cell Biology
• Oncology

Background:

• Claudins (CLDNs) are key tight junction proteins with tissue-specific expression.
• CLDN6 is highly expressed in fetal tissues but absent in corresponding adult tissues.
• CLDN6 plays a vital role in forming epithelial and epidermal permeability barriers.

Purpose of the Study:

• To review the structure, regulation, and barrier function of CLDN6.
• To emphasize the emerging roles of CLDN6 in cancer development and progression.
• To explore CLDN6 as a potential therapeutic target for various cancers.

Main Methods:

• Literature review of studies on CLDN6 structure, function, and regulation.
• Analysis of research linking CLDN6 expression to cancer phenotypes.
• Investigation of CLDN6's impact on signaling pathways, prognosis, and clinical applications in oncology.

Main Results:

• Altered CLDN6 expression is associated with various cancers.
• CLDN6 influences tumor malignant phenotypes, including proliferation, apoptosis, migration, invasion, and drug resistance.
• CLDN6 signaling pathways are implicated in cancer progression.

Conclusions:

• CLDN6's unique expression pattern and role in cancer make it an attractive target for tumor therapy.
• Understanding CLDN6's functions is crucial for developing novel cancer treatments.
• Further research into CLDN6's clinical applications in oncology is warranted.