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Clonorchis sinensis and clonorchiasis.

Byoung-Kuk Na1, Jhang Ho Pak2, Sung-Jong Hong3

  • 1Department of Parasitology and Tropical Medicine, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju 52727, Korea.

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|December 22, 2019
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Summary

Clonorchis sinensis, a liver fluke, causes clonorchiasis, a significant human health issue in East Asia. Chronic infection can lead to bile duct cancer, with parasite proteins offering potential diagnostic and therapeutic targets.

Keywords:
Bile transporterChemotaxisCholangiocarcinomaClonorchis sinensisEnzymeMolecular diagnosis

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Area of Science:

  • Parasitology
  • Hepatology
  • Oncology

Background:

  • Clonorchis sinensis is a fish-borne parasite causing clonorchiasis in 15-20 million people, primarily in East Asia.
  • Infection occurs through ingesting raw or undercooked fish containing parasite metacercariae.
  • Chronic Clonorchis sinensis infection is linked to bile duct hyperplasia, liver damage, and cholangiocarcinoma (CCA).

Purpose of the Study:

  • To review the mechanisms underlying chronic clonorchiasis-associated hepatobiliary damage and cholangiocarcinoma.
  • To highlight the role of parasite proteins in disease pathogenesis.
  • To discuss potential diagnostic and therapeutic strategies targeting C. sinensis proteins.

Main Methods:

  • Review of existing literature on Clonorchis sinensis biology, pathogenesis, and host-parasite interactions.
  • Analysis of genomic and molecular data identifying key parasite proteins.
  • Discussion of established associations between infection and cholangiocarcinoma.

Main Results:

  • Clonorchis sinensis infection induces chronic inflammation and disrupts redox homeostasis in bile ducts.
  • Dysregulated signaling pathways in cholangiocytes contribute to malignant transformation.
  • Various C. sinensis proteins crucial for parasite survival and pathogenicity have been identified.

Conclusions:

  • Chronic clonorchiasis poses a significant risk for developing cholangiocarcinoma.
  • Understanding parasite proteins is key for developing novel vaccines, chemotherapeutics, and diagnostic tools.
  • Further research into molecular mechanisms can elucidate CCA development and inform prevention strategies.