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Comparative biodistribution analysis of umbilical cord mesenchymal stromal cells via different administration routes in rabbit models Cover

Comparative biodistribution analysis of umbilical cord mesenchymal stromal cells via different administration routes in rabbit models

Open Access
|Dec 2025

Abstract

Umbilical cord mesenchymal stem cells (UC-MSCs) have shown therapeutic potential in renal diseases due to their homing ability. This study compared the effects of three administration routes (intravenous, local renal injection, and interventional injection) on UC-MSC distribution in kidney tissue. Eighteen New Zealand rabbits were assigned to the three groups (n = 6 each), and DiI-labelled UC-MSCs were tracked using confocal microscopy to evaluate their distribution in the kidney, lung, and brain. Local renal injection led to high MSC concentrations at the injection site, but distribution to the contralateral kidney was minimal and comparable to that of intravenous injection. Intravenous delivery via the marginal ear vein was simple and convenient but resulted in limited renal homing (< 1 %) and no significant difference between kidneys. Interventional injection achieved the highest delivery efficiency (12.4 %) and a more uniform renal distribution. Notably, inflammatory cytokine levels (IL-6, TNF-α, IL-10) were significantly elevated in the local injection group (p < 0.05). These results indicated that the choice of administration route critically affects MSC targeting and therapeutic potential, and interventional injection may offer the most effective strategy for precise UC-MSC delivery in renal therapy.

DOI: https://doi.org/10.2478/acph-2026-0004 | Journal eISSN: 1846-9558 | Journal ISSN: 1330-0075
Language: English
Accepted on: Oct 18, 2025
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Published on: Dec 31, 2025
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
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© 2025 Liang Xiao, Chunlin Liu, Yuqian Wang, Fucheng Xiao, Jiahua Cai, Shoukang Qu, Xiaojuan Xu, Xiaoliang Wang, Yue Liu, Yutao Peng, Jia Liu, published by Croatian Pharmaceutical Society
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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