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Olmesartan Prevented Intra-articular Inflammation Induced by Zymosan in Rats

The objective of this study was to study the effect of olmesartan medoxomil (OLM), an antihypertensive drug, on intra-articular inflammation induced by zymosan (Zy) in Wistar rats. Intra-articular inflammation was induced in the right knees of rats by 1 mg Zy dissolved in saline. The animals were di...

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Published in:Biological & pharmaceutical bulletin 2016/11/01, Vol.39(11), pp.1793-1801
Main Authors: Guerra, Gerlane Coelho Bernardo, Marília Stefani Souza de Menezes, Araújo, Aurigena Antunes de, Raimundo Fernandes de Araújo Júnior, Caroline Addison Carvalho Xavier de Medeiros
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cited_by cdi_FETCH-LOGICAL-c773t-be9c89c7da3970010aad3bce0b774647eb689f790331e4529569207889608ac93
cites cdi_FETCH-LOGICAL-c773t-be9c89c7da3970010aad3bce0b774647eb689f790331e4529569207889608ac93
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container_issue 11
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container_title Biological & pharmaceutical bulletin
container_volume 39
creator Guerra, Gerlane Coelho Bernardo
Marília Stefani Souza de Menezes
Araújo, Aurigena Antunes de
Raimundo Fernandes de Araújo Júnior
Caroline Addison Carvalho Xavier de Medeiros
description The objective of this study was to study the effect of olmesartan medoxomil (OLM), an antihypertensive drug, on intra-articular inflammation induced by zymosan (Zy) in Wistar rats. Intra-articular inflammation was induced in the right knees of rats by 1 mg Zy dissolved in saline. The animals were divided into the following groups: saline only (oral saline and intra-articular saline); Zy only (intra-articular Zy and oral saline), and intra-articular Zy and oral OLM (5, 15, or 30 mg/kg) or diclofenac sodium (SD; 100 mg/kg). Twenty-four hours after Zy injection, synovial fluid was collected for total leukocyte counts, blood was collected for biochemical measurements, and synovial tissue was collected for histopathology, immunohistochemistry, immunofluorescence and myeloperoxidase (MPO), malonaldehyde (MDA), and non-protein sulphydryl (NPSH) assays. OLM doses of 15 and 30 mg/kg had protective effects, as evidenced by improved histopathological parameters of synovium, reduced total leukocyte counts, reduced MPO and MDA levels, and increased NPSH group levels compared with the Zy group. OLM reduced immunostaining for cyclooxygenase 2, tumour necrosis factor and interleukin 17 and increased immunostaining for superoxide dismutase and glutathione peroxidase. SD produced similar results. The drugs studied caused no change in biochemical parameters of the animals. OLM showed protective effects in this model of Zy-induced intra-articular inflammation.
doi_str_mv 10.1248/bpb.b16-00296
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Intra-articular inflammation was induced in the right knees of rats by 1 mg Zy dissolved in saline. The animals were divided into the following groups: saline only (oral saline and intra-articular saline); Zy only (intra-articular Zy and oral saline), and intra-articular Zy and oral OLM (5, 15, or 30 mg/kg) or diclofenac sodium (SD; 100 mg/kg). Twenty-four hours after Zy injection, synovial fluid was collected for total leukocyte counts, blood was collected for biochemical measurements, and synovial tissue was collected for histopathology, immunohistochemistry, immunofluorescence and myeloperoxidase (MPO), malonaldehyde (MDA), and non-protein sulphydryl (NPSH) assays. OLM doses of 15 and 30 mg/kg had protective effects, as evidenced by improved histopathological parameters of synovium, reduced total leukocyte counts, reduced MPO and MDA levels, and increased NPSH group levels compared with the Zy group. OLM reduced immunostaining for cyclooxygenase 2, tumour necrosis factor and interleukin 17 and increased immunostaining for superoxide dismutase and glutathione peroxidase. SD produced similar results. The drugs studied caused no change in biochemical parameters of the animals. OLM showed protective effects in this model of Zy-induced intra-articular inflammation.</abstract><cop>Japan</cop><pub>The Pharmaceutical Society of Japan</pub><pmid>27803450</pmid><doi>10.1248/bpb.b16-00296</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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identifier ISSN: 0918-6158
ispartof Biological and Pharmaceutical Bulletin, 2016/11/01, Vol.39(11), pp.1793-1801
issn 0918-6158
1347-5215
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source Free Full-Text Journals in Chemistry
subjects Alanine Transaminase - blood
Angiotensin II Type 1 Receptor Blockers - pharmacology
Angiotensin II Type 1 Receptor Blockers - therapeutic use
Animals
Anti-Inflammatory Agents - pharmacology
Anti-Inflammatory Agents - therapeutic use
Antihypertensive Agents - pharmacology
Antihypertensive Agents - therapeutic use
Antihypertensives
Arthritis, Experimental - chemically induced
Arthritis, Experimental - drug therapy
Arthritis, Experimental - metabolism
Arthritis, Experimental - pathology
Aspartate Aminotransferases - blood
Creatinine - blood
Cyclooxygenase 2 - metabolism
Cyclooxygenase-2
Diclofenac
Glutathione - metabolism
Glutathione peroxidase
Glutathione Peroxidase - metabolism
Histopathology
Imidazoles - pharmacology
Imidazoles - therapeutic use
Immunofluorescence
Immunohistochemistry
Inflammation
Interleukin 17
Interleukin-17 - metabolism
intra-articular inflammation
Leukocyte Count
Male
Malondialdehyde
Malondialdehyde - metabolism
olmesartan
Peroxidase - metabolism
Rats
Rats, Wistar
Sodium
Superoxide dismutase
Superoxide Dismutase - metabolism
Synovial fluid
Synovial Membrane - drug effects
Synovial Membrane - metabolism
Synovial Membrane - pathology
Synovium
Tetrazoles - pharmacology
Tetrazoles - therapeutic use
Tumor necrosis factor
Tumor Necrosis Factor-alpha - metabolism
Tumors
Urea - blood
Zymosan
title Olmesartan Prevented Intra-articular Inflammation Induced by Zymosan in Rats
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