Clinically Relevant Mesenchymal Stem/Stromal Cell Sheet Transplantation Method for Kidney Disease

Area of Science:

• Regenerative Medicine
• Nephrology
• Stem Cell Biology

Background:

• Chronic kidney disease (CKD) involves irreversible nephron loss, inflammation, and fibrosis, with no current effective treatments.
• Mesenchymal stem/stromal cells (MSCs) show therapeutic potential for kidney diseases, but clinical application is limited by cell quality and administration methods.
• Previous MSC sheet transplantation required kidney decapsulation, raising concerns about kidney function and clinical translation.

Purpose of the Study:

• To develop and evaluate a novel cell sheet transplantation strategy for kidney disease using clinical-grade human clonal bone marrow-derived MSCs (cBMSCs).
• To assess the therapeutic efficacy of cBMSC sheets transplanted onto an intact renal capsule in a rat model of ischemia-reperfusion injury (IRI).

Main Methods:

• Engineered cell sheets from clinical-grade human clonal bone marrow-derived MSCs (cBMSCs).
• Transplantation of cBMSC sheets onto the intact renal capsule in a rat IRI model.
• Histological analysis and evaluation of therapeutic effects at acute (1-3 days) and chronic (28 days) stages post-transplantation.

Main Results:

• cBMSC sheets successfully engrafted onto the intact renal capsule, with some cells migrating into the renal parenchyma.
• Transplanted cBMSC sheets prevented tubular epithelial cell injury in the acute phase.
• cBMSC sheets significantly suppressed renal fibrosis in the chronic phase of the rat IRI model.

Conclusions:

• Engineered cBMSC sheet transplantation onto intact renal capsule is a promising, clinically relevant strategy for treating kidney injury and fibrosis.
• This approach mitigates concerns associated with kidney decapsulation, paving the way for improved MSC-based therapies for CKD.
• Further development of this cell sheet strategy could enhance MSC treatment efficacy for kidney diseases.