Tissue engineering of the gastroesophageal junction

Area of Science:

• Regenerative Medicine
• Gastroenterology
• Anatomy

Background:

• The gastroesophageal junction (GEJ) is vital for preventing gastroesophageal reflux disease (GERD) and associated complications like esophageal cancer.
• Dysfunction of the GEJ's anti-reflux barrier contributes significantly to disease burden, necessitating novel therapeutic strategies.
• Current tissue engineering efforts have advanced esophageal and gastric body reconstruction, but the GEJ remains largely unaddressed.

Purpose of the Study:

• To provide a comprehensive overview of critical factors for tissue engineers focusing on GEJ reconstruction.
• To highlight the need for engineered GEJ solutions due to the clinical significance of reflux barrier dysfunction.

Main Methods:

• Review of embryological development, adult anatomy, and histology of the GEJ.
• Examination of the roles of smooth muscle and diaphragmatic structures in anti-reflux function.
• Discussion of biomechanical properties and current advancements in tissue engineering relevant to the GEJ.

Main Results:

• Understanding native GEJ structure and function is essential for successful tissue engineering.
• Smooth muscle and diaphragmatic contributions are key to the anti-reflux mechanism.
• Mechanical properties must be considered for functional GEJ tissue engineering.

Conclusions:

• Developing tissue-engineered GEJ replacements is a critical unmet need.
• A multidisciplinary approach integrating developmental biology, anatomy, and engineering principles is required.
• Further research into GEJ mechanics and biomaterials is crucial for advancing regenerative therapies.