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Embryonic stem cell-derived extracellular vesicles alleviate ovarian dysfunction.

Xiang Li1, Ru Ma2, Mantong Zhao2

  • 1Department of Gynecology, Tianjin Union Medical Center, The First Affiliated Hospital of Nankai University, Nankai University, Tianjin 300121, China; School of Medicine, Nankai University, Tianjin 300121, China.

Mechanisms of Ageing and Development
|April 25, 2026
PubMed
Summary
This summary is machine-generated.

Extracellular vesicles from embryonic stem cells (ESC-EVs) show promise in restoring ovarian function and fertility in a mouse model of chemotherapy-induced premature ovarian insufficiency (POI). ESC-EVs rejuvenate the ovarian niche by reducing fibrosis and senescence, offering a potential fertility preservation strategy.

Keywords:
Embryonic stem cellsExtracellular vesiclesOvarian agingPremature ovarian insufficiency

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Area of Science:

  • Reproductive Biology
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Premature ovarian insufficiency (POI) leads to irreversible infertility due to follicular depletion.
  • Current treatments fail to reliably preserve fertility after gonadotoxic chemotherapy.
  • Extracellular vesicles from embryonic stem cells (ESC-EVs) show potential for tissue regeneration.

Purpose of the Study:

  • To investigate if ESC-EVs can prevent or reverse POI.
  • To identify cellular programs engaged by ESC-EVs to restore ovarian function.

Main Methods:

  • ESC-EVs were tested in a cyclophosphamide (Cy)-induced POI mouse model.
  • Ovarian function was assessed via estrous cyclicity, follicle counts, fertility, histology, fibrosis, and senescence.
  • Granulosa cell transcriptomics were performed to analyze ESC-EV-driven molecular changes.

Main Results:

  • ESC-EV treatment restored estrous cyclicity and fertility in POI mice.
  • Follicle numbers were recovered, and stromal fibrosis and senescence were reduced.
  • Gene expression analysis revealed activation of estrogen-responsive and gametogenesis programs, with modulation of Nrf2 and DNA damage pathways.

Conclusions:

  • ESC-EVs rejuvenate the granulosa-oocyte niche by reducing fibrosis and senescence.
  • ESC-EVs reactivate key folliculogenic and estrogen-responsive programs, restoring ovarian function in a POI model.
  • ESC-EVs represent a promising cell-free regenerative therapy for fertility preservation and ovarian rejuvenation.