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Updated: Mar 14, 2026
Intravascular Delivery of Biologics to the Rat Kidney
Published on: September 1, 2016
Intravascular Delivery of Biologics to the Rat Kidney
Federico Franchi1, Xiang Yang Zhu2, Tyra A Witt1
1Divisions of Cardiovascular Diseases, Department of Internal Medicine, Mayo Clinic.
Abstract:
The renal microvascular compartment plays an important role in the progression of kidney disease and hypertension, leading to the development of End Stage Renal Disease with high risk of death for cardiovascular events. Moreover, recent clinical studies have shown that renovascular structure and function may have a great impact on functional renal recovery after surgery. Here, we describe a protocol for the delivery of drugs into the renal artery of rats. This procedure offers significant advantages over the frequently used systemic administration as it may allow a more localized therapeutic effect. In addition, the use of rodents in pharmacodynamic analysis of preclinical studies may be cost effective, paving the way for the design of translational experiments in larger animal models. Using this technique, infusion of rat recombinant Vascular Endothelial Growth Factor (VEGF) protein in rats has induced activation of VEGF signaling as shown by increased expression of FLK1, pAKT/AKT, pERK/ERK. In summary, we established a protocol for the intrarenal delivery of drugs in rats, which is simple and highly reproducible.
Insights
This study presents a simple, reproducible method for intrarenal drug delivery in rats. This technique enables localized drug effects and supports preclinical research for kidney disease and hypertension treatments.
Area of Science:
- Nephrology
- Pharmacology
- Surgical Technique
Background:
- Renal microvascular health is crucial for kidney disease and hypertension progression.
- Renovascular structure and function impact post-surgical renal recovery.
- Systemic drug administration lacks localized therapeutic effects.
Purpose of the Study:
- To establish a protocol for intrarenal drug delivery in rats.
- To enable localized therapeutic effects for kidney disease research.
- To facilitate cost-effective preclinical pharmacodynamic analysis.
Main Methods:
- Developed a protocol for direct drug infusion into the renal artery of rats.
- Administered rat recombinant Vascular Endothelial Growth Factor (VEGF) protein.
- Analyzed VEGF signaling pathway activation via protein expression.
Main Results:
- Demonstrated a simple and highly reproducible intrarenal drug delivery protocol.
- Confirmed successful localized delivery and biological effect of VEGF.
- Observed increased expression of FLK1, pAKT/AKT, and pERK/ERK, indicating VEGF pathway activation.
Conclusions:
- Established a novel, reproducible method for intrarenal drug delivery in rats.
- This technique allows for localized drug administration, enhancing preclinical research.
- The protocol supports translational studies for kidney disease and hypertension therapies.
