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Pharmacological and toxicological evaluations of the new pyrazole compound (LQFM-021) as potential analgesic and anti-inflammatory agents.

Abstract：

:Chronic inflammation is a world health problem. There is a need to develop new anti-inflammatory and analgesic drugs with improved activity and reduced side effects. In this context, the aim of this study was to evaluate the antinociceptive and anti-inflammatory effects of the pyrazole compound LQFM-021 after acute and sub-chronic administration in rats submitted to a CFA-induced chronic arthritis model, as well as compare the toxicity of this compound to that of dipyrone, given throughout 7 days. Firstly, we observed that acute oral administration of the higher dose (130 µmol/kg) of LQFM-021 reduced paw lifting time (PET) and edema formation. These effects disappeared on the following day, requiring another dose to maintain the effects. This dose also promoted reduction of the polymorphonuclear recruitment in the synovial fluid. In another experiment, both treatments with LQFM-021, 65 µmol/kg twice a day and 130 µmol/kg once a day, produced a progressive and permanent reduction of the PET and edema, also reducing polymorphonuclear recruitment. However, the single treatment with 130 µmol/kg was more effective than the double treatment with 65 µmol/kg. LQFM-021 did not produce toxicity signs. However, dipyrone (130 µmol/kg once a day) promoted erosion of the epithelial cells and decreased mucus in the gastric mucosa. These data indicate that LQFM-021 produced antinociceptive and anti-inflammatory effects in CFA-induced arthritis in rats. These effects occurred in the absence of apparent toxic effects, indicating that the pyrazole compound LQFM-021 may be considered a good prototype for development of new analgesic/anti-inflammatory drug.

journal_name

Inflammopharmacology

journal_title

Inflammopharmacology

authors

Florentino IF,da Silva DP,Martins JL,da Silva TS,Santos FC,Tonussi CR,Vasconcelos GA,Vaz BG,Lião LM,Menegatti R,Costa EA

doi

10.1007/s10787-016-0282-3

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

265-275

issue

eissn

0925-4692

issn

1568-5608

pii

10.1007/s10787-016-0282-3

journal_volume

pub_type

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Pharmacological and toxicological evaluations of the new pyrazole compound (LQFM-021) as potential analgesic and anti-inflammatory agents.