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Stem cells in acute kidney injury
Benedetta Bussolati1, Giovanni Camussi
1Renal Vascular Pathophysiology Laboratory, Department of Internal Medicine, University of Turin, Turin, Italy.
Contributions to Nephrology
|April 28, 2007
Summary
Stem cells (SCs) show potential in treating acute kidney injury by aiding tubular repair. While bone marrow-derived SCs can migrate to injured kidneys, their primary benefit may stem from modifying the local environment to stimulate resident cell regeneration.
Area of Science:
- Nephrology
- Stem Cell Biology
- Regenerative Medicine
Background:
- Acute renal failure recovery hinges on kidney regeneration after injury.
- Stem cells (SCs) are being investigated for their role in repairing acute tubular injury.
- Bone marrow-derived SCs can migrate to injured kidneys but have a limited direct role in tubular regeneration.
Purpose of the Study:
- To investigate the contribution of stem cells to kidney regeneration after acute tubular injury.
- To explore the mechanisms behind the therapeutic benefits of mesenchymal stem cells in acute renal failure models.
- To evaluate the potential of resident kidney stem cells in renal injury repair.
Main Methods:
- Review of evidence on bone marrow-derived stem cell migration and function in injured kidneys.
- Analysis of experimental models using ex vivo expanded bone marrow-derived mesenchymal stem cells.
- Examination of studies identifying resident progenitor/stem cell populations in the adult kidney.
Main Results:
- Ex vivo expanded mesenchymal stem cells demonstrate benefits in experimental acute renal failure.
- Direct transdifferentiation or fusion of administered SCs plays a minor role in tubular repopulation.
- Administered SCs may enhance kidney repair by modulating the microenvironment, promoting dedifferentiation and proliferation of surviving tubular cells or resident SCs.
Conclusions:
- Resident stem cells in the adult kidney are crucial for repairing renal injury.
- Therapeutic strategies for acute kidney injury can involve administering ex vivo expanded SCs.
- Future treatments may focus on stimulating the expansion and differentiation of endogenous kidney progenitor/SC populations.
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