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Related Experiment Video

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Functional Human Podocytes Generated in Organoids from Amniotic Fluid Stem Cells.

Christodoulos Xinaris1, Valentina Benedetti2, Rubina Novelli2

  • 1IRCCS-Istituto di Ricerche Farmacologiche 'Mario Negri', Centro Anna Maria Astori, Science and Technology Park Kilometro Rosso, Bergamo, Italy; christodoulos.xinaris@marionegri.it cxinaris@yahoo.com.

Journal of the American Society of Nephrology : JASN
|October 31, 2015
PubMed
Summary

Researchers created kidney organoids from mouse cells that mimic natural kidney function. Mixing these with human stem cells yielded chimeric organoids with specialized human cells, advancing kidney research and disease modeling.

Keywords:
filtration slitsglomerulogenesishuman amniotic fluid stem cellskidney organoidskidney regenerationpodocyte

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Area of Science:

  • Nephrology
  • Stem Cell Biology
  • Regenerative Medicine

Background:

  • Generating functional nephrons in vitro remains a significant challenge for kidney research.
  • Existing cell-based strategies have not produced intact three-dimensional epithelial filtering barriers necessary for kidney function.

Purpose of the Study:

  • To develop kidney organoids capable of forming a functional three-dimensional filtering barrier.
  • To investigate the potential of human amniotic fluid stem cells in creating chimeric kidney organoids with enhanced function.

Main Methods:

  • Generation of kidney organoids using murine embryonic kidney cells to recapitulate glomerular structures.
  • Co-culture of human amniotic fluid stem cells with mouse embryonic kidney cells to create three-dimensional chimeric organoids.
  • In vivo engraftment and analysis of chimeric organoids for vascularization, glomerular formation, and cellular differentiation.

Main Results:

  • Murine kidney organoids successfully replicated the three-dimensional filtering structure of glomerular slits and demonstrated selective filtration and reabsorption.
  • Chimeric organoids formed vascularized glomeruli and tubular structures upon in vivo engraftment.
  • Human cells within chimeric organoids differentiated into podocytes with slit diaphragms and exhibited BSA internalization, indicating specialized function.

Conclusions:

  • Human amniotic fluid stem cell chimeric organoids represent a novel platform for studying renal development and human podocyte diseases.
  • This approach offers unprecedented in vivo specialization and function for donor stem cells, facilitating drug discovery and translational research.