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Simplified Intrafemoral Injections Using Live Mice Allow for Continuous Bone Marrow Analysis

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Published on: November 10, 2023

Cells derived from young bone marrow alleviate renal aging.

Hai-Chun Yang¹, Michele Rossini, Li-Jun Ma

¹Department of Pathology, Vanderbilt University Medical Center, Nashville, TN 37232, USA.

Journal of the American Society of Nephrology : JASN

|October 4, 2011

Summary

Young bone marrow cells can reverse kidney aging in older mice. This study shows young stem cells reduce kidney damage markers and improve anti-aging gene expression, suggesting a potential therapy for age-related kidney disease.

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Area of Science:

Gerontology
Nephrology
Stem Cell Biology

Background:

Bone marrow-derived stem cells (BMSCs) show potential in modulating renal injury.
The age of BMSCs may influence their therapeutic effects on kidney aging.

Purpose of the Study:

To investigate if bone marrow from young mice can attenuate renal aging in old mice.
To explore the mechanisms by which young BMSCs might impact kidney aging.

Main Methods:

Bone marrow cells (BMCs) from young (8-wk-old) or old (12-mo-old) male mice were used to reconstitute lethally irradiated 12-mo-old female mice.
Evaluated renal aging markers including collagen IV deposition, β-galactosidase staining (senescence indicator), and expression of PAI-1, PDGF-B, FSP-1, p16, p21, Klotho, and IGF-1 receptor β.

Main Results:

Transfer of young BMCs significantly decreased collagen IV deposition and β-galactosidase staining in the kidneys of old mice.
Young BMCs led to reduced expression of senescence markers (PAI-1, PDGF-B, FSP-1, p16, p21) and increased expression of the anti-aging gene Klotho.
Old-to-old BMC transfer showed increased FSP-1 expression in bone marrow-derived cells over time compared to young-to-old.
Young-to-old mice exhibited less IGF-1 receptor β phosphorylation.

Conclusions:

Young bone marrow-derived cells can alleviate renal aging in old mice.
Potential mechanisms include direct cellular reconstitution, paracrine effects, and modulation of circulating anti-aging molecules.
These findings suggest young stem cells as a promising therapeutic strategy for age-related kidney decline.