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Related Experiment Video

Updated: Mar 1, 2026

Reprogramming Primary Amniotic Fluid and Membrane Cells to Pluripotency in Xeno-free Conditions
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Development of a novel method for amniotic fluid stem cell storage.

Manuela Zavatti1, Francesca Beretti1, Francesca Casciaro1

  • 1Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy.

Cytotherapy
|June 3, 2017
PubMed
Summary

Directly freezing amniotic fluid stem cells (AFSCs) maintains their potential and may enhance pluripotency markers. This minimal processing approach avoids lengthy in vitro culture, offering a cost-effective method for stem cell banking.

Keywords:
amniotic fluid stem cellsdirect freezingstem-cell bank

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Area of Science:

  • Stem cell biology
  • Regenerative medicine
  • Cellular therapies

Background:

  • Current human amniotic fluid stem cell (hAFSC) collection involves 2-week flask culturing.
  • hAFSCs can be obtained directly from amniotic fluid during diagnostic amniocentesis.
  • The study investigates direct freezing of amniotic fluid cells to preserve stem cell potential.

Purpose of the Study:

  • To compare the stem cell potential of hAFSCs after direct freezing versus post-culture freezing.
  • To evaluate the impact of minimal processing on stem cell characteristics.

Main Methods:

  • Compared colony-forming ability, proliferation, morphology, marker expression, senescence, apoptosis, and differentiation of directly frozen (D) and cultured (C) hAFSCs.
  • Assessed stemness-related marker expression and pluripotency markers.

Main Results:

  • Directly frozen hAFSCs (D samples) maintained mesenchymal stem cell marker expression longer and showed similar differentiation capacity to cultured cells (C samples).
  • Direct freezing increased the concentration of cells positive for pluripotency markers without teratoma formation.
  • D samples exhibited good proliferation rates.

Conclusions:

  • Minimal processing, such as direct freezing of amniotic fluid cells, is adequate for banking.
  • Avoiding in vitro passages preserves stem cell properties affected by high oxygen concentration.
  • This method offers a cost-effective approach for stem cell banking and Good Manufacturing Practice accreditation.