The EGFR Signaling Pathway Is Involved in the Biliary Intraepithelial Neoplasia Associated with Liver Fluke Infection

Area of Science:

• Hepatobiliary diseases
• Parasitology
• Cancer biology

Background:

• Foodborne trematode infections are linked to cholangiocarcinoma (CCA) in endemic areas.
• Opisthorchis felineus infection causes precancerous lesions in bile ducts.
• Mechanisms of liver fluke-induced neoplasia are not fully understood.

Purpose of the Study:

• To investigate the role of EGFR and Toll-like receptor 4 (TLR-4) signaling in bile duct neoplasia associated with liver fluke infection.
• To explore potential therapeutic targets for helminth-associated carcinogenesis.

Main Methods:

• Analysis of EGFR and phosphorylated EGFR in bile duct epithelium of CCA patients and hamsters.
• Treatment of human cholangiocytes (H69) and hepatoma cells (HepG2) with helminth excretory-secretory products (ESP).
• Assessment of cell proliferation and migration using EGFR and TLR-4-associated metalloproteinase inhibitors (Marimastat).

Main Results:

• Elevated EGFR levels correlated with bile duct epithelial neoplasia in patients and hamsters.
• ESP treatment increased proliferation and migration of H69 cholangiocytes but not HepG2 cells.
• EGFR inhibition and Marimastat reversed ESP-induced proliferation and migration.

Conclusions:

• EGFR and TLR-4-associated signaling pathways are implicated in liver fluke-induced bile duct neoplasia.
• Specific components within helminth ESPs may drive mitogenic effects.
• Targeting these pathways presents novel therapeutic strategies for helminth-associated cancers.