No abstract

A síntese, a caracterização físico-química, as propriedades anti-inflamatórias e a atividade mimética de catecolase do complexo de cobre(II) com a droga anti-inflamatória non-esteroidal Fenoprofeno [ácido 2-(3-fenóxifenil)propiônico] com fórmula [Cu 2 (fen) 2 (dmf) 2 ] (fen = ânion do fenoprofenato, dmf = N,N-dimetilformamida) foram investigadas. Os resultados da análise espectroscópica (espectros de FTIR e EPR) e dados de análise termogravimétrica e térmica diferencial obtidos para o complexo sólido estão de acordo com a sua estrutura dinuclear. Os espectros eletrônicos do produto são igualmente apresentados e discutidos neste trabalho. O complexo foi testado para as suas propriedades anti-inflamatórias em comparação com a droga de referência, o sal de cálcio do Fenoprofeno. A administração oral do composto binuclear inibiu o desenvolvimento do edema induzido por carragenana em ratos; esta inibição foi mais significativa do que a obtida com a droga de referência. O estudo cinético da atividade mimética da catecolase foi realizado espectrofotometricamente, monitorando-se a transformação oxidativa do 3,5-di-terc-butilcatecol na o-quinona correspondente. Os parâmetros cinéticos foram determinados pelo emprego do modelo de Michaelis-Menten, que demonstrou que o novo complexo mimetiza a atividade da catecol oxidase.The synthesis, physicochemical characterization, anti-inflammatory properties and catecholase mimetic activity of the dinuclear complex of copper(II) with the non-steroidal anti-inflammatory drug Fenoprofen [2-(3-phenoxyphenyl)propionic acid] with formula [Cu 2 (fen) 4 (dmf) 2 ] (fen = fenoprofenate anion, dmf = N,N-dimethylformamide) have been investigated. Results of spectroscopic analysis (FTIR and EPR) as well as thermogravimetric and differential thermal analysis data obtained for the solid complex are in good agreement with its dinuclear structure. Electronic spectra of the product are also reported and discussed. The complex was tested for anti-inflammatory properties in comparison to the parent drug, Fenoprofen calcium salt. Oral administration of the dinuclear compound inhibited development of carrageenan-induced oedema in mice; this inhibition was higher than that observed for the parent drug. The kinetic study of the catecholase mimetic activity was carried out spectrophotometrically by monitoring the oxidative transformation of 3,5-di-tert-butylcatechol into the corresponding light-absorbing o-quinone. Kinetic parameters were determined employing the Michaelis-Menten model, showing that the new complex presents catechol oxidase mimetic activity.Keywords: copper(II), Fenoprofen, anti-inflammatory properties, catecholase activity IntroductionThe proposed curative properties of copper(II) carboxylate-based non-steroidal anti-inflammatory drugs (NSAIDs) have led to the development of numerous mononuclear and dinuclear copper(II) complexes of NSAIDs with enhanced anti-inflammatory activity.1,2 The elevation of total blood copper levels during acute as well as chronic inflammatory states has been re...

Analgesic and ulcerogenic properties have been studied for the copper(II) coordination complex of the nonsteroidal anti-inflammatory drug Fenoprofen and imidazole [Cu(fen)2(im)2] (Cu: copper(II) ion; fen: fenoprofenate anion from Fenoprofen, im: imidazole). A therapeutic dose of 28 mg/kg was tested for [Cu(fen)2(im)2] and 21 mg/kg was employed for Fenoprofen calcium, administered by oral gavage in female mice to compare the therapeutic properties of the new entity. The acetic acid induced writhing test was employed to study visceral pain. The percentage of inhibition in writhing and stretching was 78.9% and 46.2% for the [Cu(fen)2(im)2] and Fenoprofen calcium, respectively. This result indicates that the complex could be more effective in diminishing visceral pain. The formalin test was evaluated to study the impact of the drugs over nociceptive and inflammatory pain. The complex is a more potent analgesic on inflammatory pain than the parent drug. Ulcerogenic effects were evaluated using a model of gastric lesions induced by hypothermic-restraint stress. Fenoprofen calcium salt caused an ulcer index of about 79 mm2 while the one caused by [Cu(fen)2(im)2] was 22 mm2. The complex diminished the development of gastric mucosal ulcers in comparison to the uncomplexed drug. Possible mechanisms of action related to both therapeutic properties have been discussed.

No abstract

The present pandemic produced by SARS-CoV-2 and its variants represents an example of the one health concept in which humans and animals are components of the same epidemiologic chain. Animal reservoirs of these viruses are thus the focus of surveillance programs to monitor their circulation and evolution in potentially new hosts and reservoirs. In this work, we report the detection of SARS-CoV-2 Gamma variant infection in four specimens of Chaetophractus villosus (big hairy armadillo/armadillo peludo) in Argentina. In addition to the finding of a new wildlife species susceptible to SARS-CoV-2 infection, the identification of the Gamma variant three months after its last detection in humans is a noteworthy result, raising the question of potential unidentified viral reservoirs.

No abstract