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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
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Related Experiment Video

Updated: Dec 8, 2025

A Protocol for Constructing a Rat Wound Model of Type 1 Diabetes
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Amniotic fluid stem cell therapy improves erectile function in a diabetic rat model.

Weerayut Wiriyabanditkul1,2, Guiting Lin1, Majken Højrup Wiborg1,3

  • 1Department of Urology, Knuppe Molecular Urology Laboratory, School of Medicine, University of California, San Francisco, California, USA.

Andrology
|September 5, 2025
PubMed
Summary

Amniotic fluid-derived stem cells significantly improved erectile function in diabetic rats. This regenerative therapy promoted nerve and blood vessel repair, reduced cellular aging, and restored penile tissue.

Keywords:
amniotic fluid‐derived stem cells (AFSCs)diabetic ED (DMED)intracavernous pressure (ICP)mechanismtreatment

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Area of Science:

  • Regenerative Medicine
  • Stem Cell Therapy
  • Urology

Background:

  • Diabetic erectile dysfunction (ED) involves neural, vascular, and smooth muscle degeneration.
  • Current ED treatments offer symptomatic relief but don't address underlying causes.
  • Amniotic fluid-derived stem cells (AFSCs) show potential for tissue regeneration.

Purpose of the Study:

  • Evaluate AFSCs for treating diabetic ED in a rat model.
  • Assess AFSCs' impact on erectile function and penile tissue regeneration.
  • Investigate AFSCs' therapeutic potential for neurovascular repair and senescence reduction.

Main Methods:

  • Diabetic ED induced in Sprague-Dawley rats using streptozotocin.
  • Intracavernous injection of AFSCs (1 × 10^6 cells/rat).
  • Evaluated erectile function, penile histology, and cellular senescence via specific markers and staining.

Main Results:

  • AFSC treatment significantly improved erectile function (increased intracavernous pressure/mean arterial pressure ratio).
  • Restored neuronal and endothelial markers, increased smooth muscle actin expression.
  • Reduced cellular senescence (β-galactosidase activity) in penile tissues.

Conclusions:

  • Intracavernous AFSC therapy effectively restores erectile function in diabetic rats.
  • AFSCs promote neurovascular regeneration and reduce penile tissue senescence.
  • AFSCs represent a promising regenerative approach for diabetic ED, warranting further research.