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Related Experiment Video

Updated: Jul 27, 2025

Extraction of Extracellular Vesicles from Whole Tissue
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Small extracellular vesicles but not microvesicles from

Sujittra Chaiyadet1, Javier Sotillo2, Michael Smout3

  • 1Department of Tropical Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.

Biorxiv : the Preprint Server for Biology
|June 9, 2023
PubMed
Summary
This summary is machine-generated.

Extracellular vesicles (EVs) from the liver fluke O. viverrini play a role in promoting cancer. Different O. viverrini EV populations differentially affect host cells, offering insights into opisthorchiasis-associated malignancy.

Keywords:
Opisthorchis viverriniRNA-seqcholangiocarcinomaextracellular vesiclesmiRNAs

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Area of Science:

  • Parasitology
  • Cancer Biology
  • Molecular Biology

Background:

  • Chronic infection with the liver fluke Opisthorchis viverrini (O. viverrini) is a significant public health concern, strongly linked to cholangiocarcinoma (CCA) development in Southeast Asia.
  • The precise molecular mechanisms by which O. viverrini drives CCA pathogenesis remain largely elusive, hindering effective prevention and treatment strategies.

Approach:

  • This study characterized distinct extracellular vesicle (EV) populations released by O. viverrini (OvEVs) through proteomic and transcriptomic analyses.
  • The functional impact of different OvEV fractions (120k vs. 15k) on human cholangiocyte proliferation (H69 cells) was assessed.
  • miRNA content of the 120k OvEVs was analyzed, and computational methods were employed to predict their interactions with human host genes.

Key Points:

  • Proteomic analysis revealed compositional differences between 120k and 15k OvEVs, correlating with their distinct biological effects.
  • 120k OvEVs significantly promoted H69 cell proliferation, whereas 15k OvEVs showed no significant effect compared to controls.
  • miRNAs within 120k OvEVs were predicted to target key human host genes involved in inflammation, immune response, and apoptosis.

Conclusions:

  • This research provides the first evidence of specific roles for distinct extracellular vesicle populations in the pathogenesis of a parasitic helminth infection.
  • The findings advance our understanding of the molecular mechanisms underlying opisthorchiasis and the development of liver fluke-associated CCA.
  • Differential functions of OvEVs highlight their potential as biomarkers or therapeutic targets in managing O. viverrini infection and related cancers.