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Endothelial cell transfusion ameliorates endothelial dysfunction in 5/6 nephrectomized rats.
Maricica Pacurari1, Dongqi Xing, Rob H P Hilgers
1Vascular Biology and Hypertension Program, Division of Cardiovascular Disease, Department of Medicine, The University of Alabama at Birmingham, Birmingham, Alabama; and.
American Journal of Physiology. Heart and Circulatory Physiology
|August 20, 2013
Summary
Transfusing endothelial cells (ECs) improves vascular function in chronic kidney disease models. This therapy enhances nitric oxide synthase activity and regulates dimethylarginine dimethylaminohydrolases 1 (DDAH1) expression, offering a potential treatment for kidney disease-related vascular issues.
Area of Science:
- Nephrology
- Vascular Biology
- Regenerative Medicine
Background:
- Endothelial dysfunction is a common complication in chronic kidney disease (CKD).
- CKD is associated with impaired vascular reactivity and increased cardiovascular risk.
- Current treatments for CKD-related vascular complications are limited.
Purpose of the Study:
- To investigate the therapeutic potential of endothelial cell (EC) transfusion in a rat model of CKD.
- To determine if EC transfusion can ameliorate endothelial dysfunction in CKD.
- To elucidate the underlying mechanisms of EC transfusion's effects on vascular function.
Main Methods:
- A 5/6 nephrectomy (Nx) rat model of CKD was established.
- Rats received intravenous transfusion of ECs or vehicle.
- Vascular reactivity was assessed using wire myography.
- Nitric oxide synthase (NOS) activity and asymmetric dimethylarginine (ADMA) levels were measured.
- Expression of dimethylarginine dimethylaminohydrolases 1 (DDAH1) was analyzed via mRNA and immunohistochemistry.
Main Results:
- Nx significantly impaired endothelium-dependent relaxation and vasodilation, which was improved by EC transfusion.
- EC transfusion restored endothelial nitric oxide synthase (eNOS) activity, mitigating CKD-induced endothelial dysfunction.
- Plasma ADMA levels decreased, and renal DDAH1 expression increased following EC transfusion.
- Immunohistochemistry confirmed increased local DDAH1 expression in response to EC transfusion.
Conclusions:
- Endothelial cell transfusion effectively attenuates vascular dysfunction in a rat model of CKD.
- The therapeutic effect is mediated by enhanced eNOS activity and regulation of DDAH1 expression.
- EC-based therapy represents a promising novel strategy for improving vascular health in patients with CKD.
