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Defining the Ovarian Cancer Precancerous Landscape through Modeling Fallopian Tube Epithelium Reprogramming Driven by

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Ovarian cancer small extracellular vesicles (sEVs) alter human fallopian tube epithelium (hFTE) gene expression, promoting immune signaling changes. This microfluidic model reveals early pathogenesis events in the fallopian tube, the origin of ovarian cancer.

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Area of Science:

  • Reproductive biology
  • Cancer research
  • Biotechnology

Background:

  • Serous tubal intraepithelial carcinomas (STICs) in human fallopian tube epithelium (hFTE) are precursors to high-grade serous ovarian cancer.
  • Small extracellular vesicles (sEVs) mediate critical signaling in normal and cancerous tissues.
  • Ex vivo systems for studying sEV impact on hFTE are limited.

Purpose of the Study:

  • To develop and utilize a microfluidic platform for studying sEV-hFTE interactions.
  • To analyze short-term transcriptomic and long-term proteomic responses of hFTE to ovarian cancer sEVs.
  • To investigate early molecular changes in ovarian cancer pathogenesis within the fallopian tube.

Main Methods:

  • A microfluidic tissue culture platform was engineered for hFTE.
  • Combined spatial transcriptomics and proteomics were employed for dual response profiling.
  • Ovarian cancer-derived sEVs were used to stimulate hFTE cultures over 1 and 14 days.

Main Results:

  • Short-term (1-day) sEV exposure altered 68 transcripts in hFTE secretory cells, including immune-related genes (e.g., CXCL, VCAM1, NFKB1, IL1B).
  • Long-term (14-day) sEV exposure modified 7 transcripts and 25 EV cargo proteins in secondary release EVs from hFTE.
  • Ovarian cancer sEVs were shown to rewire target cell signaling and modify the tubal immune landscape.

Conclusions:

  • Ovarian cancer-derived sEVs induce significant transcriptomic and proteomic changes in hFTE.
  • The microfluidic platform effectively models early ovarian cancer pathogenesis in the fallopian tube.
  • Findings provide insights into EV-driven cell signaling reprogramming in hFTE, the tissue of origin for ovarian cancer.