Abstract
Background
Inflammation plays a key role in the pathogenesis of several chronic diseases. The urokinase plasminogen activator receptor (uPAR) exerts a plethora of functions in both physiological and pathological processes, including inflammation.
Objective and design
In this study, we evaluated the anti-inflammatory effect of a novel peptide ligand of uPAR, UPARANT, in different animal models of inflammation.
Subjects and treatment
Rats and mice were divided in different groups (n = 5) for single or repeated administration of vehicle (9% DMSO in 0.9% NaCl), UPARANT (6, 12 and 24 mg/kg) or dexamethasone (2 mg/kg). Animals were subjected to carrageenan-induced paw oedema or zymosan-induced peritonitis.
Methods
UPARANT effects were tested on: (1) the carrageenan-induced paw oedema volume, (2) the expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) and the nitrite/nitrate (NOx) levels in the paw exudates, (3) cells recruitment into the peritoneal cavity after zymosan injection and (4) NOx levels in the peritoneal lavage.
Results
UPARANT (12 and 24 mg/kg) reduced inflammation in both experimental paradigms. Analysis of pro-inflammatory enzymes revealed that administration of UPARANT reduced iNOS, COX2 and NO over-production.
Conclusions
Our study provides a solid evidence that UPARANT reduces the severity of inflammation in diverse animal models, thus representing a novel anti-inflammatory drug with potential advantages with respect to the typical steroidal agents.
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Boccella, S., Panza, E., Lista, L. et al. Preclinical evaluation of the urokinase receptor-derived peptide UPARANT as an anti-inflammatory drug. Inflamm. Res. 66, 701–709 (2017). https://doi.org/10.1007/s00011-017-1051-5
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DOI: https://doi.org/10.1007/s00011-017-1051-5