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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

O aumento da seletividade cox-2 influencia na modulaÃÃo do edema de pata de rato induzido por carragenina? / The increase of selectivity COX-2 influences in the modulation of paw edema induced rat for carrageenan?

Daniel de SÃ Cavalcante 29 March 2007 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / Os antiinflamatÃrios podem apresentar efeitos diferenciados quanto a eficÃcia terapÃutica, podendo, alguns serem bons analgÃsicos e outros potentes antiinflamatÃrios. Neste estudo, foram avaliados e comparados os efeitos anti-edematogÃnicos de antiinflamatÃrios nÃo esteroidais seletivos COX-2, lumiracoxibe 5mg/Kg, 30mg/Kg, 100mg/Kg, relativamente seletivos, nimesulida 25mg/Kg, meloxicam 30mg/Kg, nÃo seletivos COX, diclofenaco de sÃdio 20mg/Kg, alÃm dos glicocorticÃides dexametasona (3mg/Kg) e hidrocortisona (4mg/Kg), no clÃssico modelo de edema em pata de rato induzido por carragenina (EPICg). Cada grupo com 4 animais, recebia uma hora antes da injeÃÃo subcutÃnea (s.c) intraplantar do estÃmulo inflamatÃrio a dose referente de cada droga a ser testada, sendo que o grupo-controle recebia soluÃÃo salina 0,9%. ApÃs uma hora da administraÃÃo destas doses, 0,1mL de carragenina a 1% era injetada na pata direita de cada animal. O volume da pata edemasiada foi aferido quatro vezes em intervalos de uma hora, em um pletismÃgrafo digital (Ugo Basile Â).O efeito antiedematogÃnico de cada droga testada foi determinado pela comparaÃÃo dos resultados com o grupo-controle atravÃs do teste ANOVA. Dexametasona (3mg/Kg) e diclofenaco (20mg/Kg) foram as drogas com melhor desempenho, com taxa de reduÃÃo significativa do edema, na 3Â hora, em 94,20% e 84,43%, respectivamente. JÃ o lumiracoxibe, nas trÃs concentraÃÃes utilizadas, 5mg/Kg, 30mg/Kg, 100mg/Kg, obteve efeito significativo na reduÃÃo do edema, com 47,49%, 61,21%, 47,76% respectivamente na 3Â hora. Meloxicam, nimesulida e hidrocortisona tambÃm demonstraram eficiÃncia, com taxas de 42,48%, 62,27% e 58,84%, respectivamente. O presente estudo demonstrou que dexametasona (3mg/Kg) e diclofenaco (20mg/Kg) apresentaram potente aÃÃo antiedematogÃnica e que drogas mais seletivas COX-2 nÃo mostraram eficÃcia comparÃvel ao diclofenaco / The anti-inflammatories might present several efects about de therapeutical efficacy being some powerful antiinflammatories, but others act as excellent analgesics. In this study were observed and compared the anti-edematogenic efects of selective COX-2 non-steroidal antiinflammatories, lumiracoxib 5mg/Kg, 30mg/Kg, 100mg/Kg, relatively selected, nimesulide 25mg/Kg, meloxicam 30mg/Kg, non selective COX, diclofenac 20mg/Kg, yet of the glucocorticoids dexamethasone (3mg/Kg) and hydrocortisone (4mg/Kg), on the classic model of the edema on rat paw induced by carrageenan. Each group of four animals got one hour before the subcutaneous injection (sc) of the inflamatory estimulation the dosage of each drug to be tested, being that the control group received saline solution 0.9%. After one hour of the management of those dosages, 0.1% to 1% of carrageenan was injected in the right paw of each animal. The volume of the edema paw was checked four times in between one hour breaks, in a digital pletismograph (Ugo Basile Â).The antiedematogenic effect of each tested drug was determined by the comparission of the results with the control group through the ANOVA test. Dexamethasone (3mg/Kg) and Diclofenac (20mg/Kg) were the drugs with best performance with significative reduction rate of the edema, on the third hour, in 94.20% and 84.43% respectively. But the lumiracoxib on the three concentrations used, 5mg/Kg, 30mg/Kg, 100mg/Kg got significative effect on the reduction of the edema with 47,49%, 61,21%, 47,76% respectively on the third hour. Meloxicam, nimesulide and hydrocortisone also demonstrated eficiency with rates of 42,48%, 62,27% and 58,84% respectively. The current study demonstrated that dexamethasone (3mg/Kg) and diclofenac (20mg/Kg) presented potencial antiedematogenic action and that more COX-2 selective drugs didnât show eficacy comparable to diclofenac

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