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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

Atividade anti-inflamatória e antinociceptiva de 4-((1-fenil-1h-pirazol-4-il) metil) piperazina-1-carboxilato: um novo derivado piperazínico / Antinociceptive and anti-inflamatory activities of 4-[(1-fenil-1h-pirazol-4-il) methyl] piperazine-1-carboxiylic acid ester: a new piperazine derivate

Silva, Daiany Priscilla Bueno da 25 February 2015 (has links)
Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2016-04-20T13:30:13Z No. of bitstreams: 2 Dissertação - Daiany Priscilla Bueno da Silva - 2015.pdf: 1122736 bytes, checksum: fc98524b1ad5d0e3a0cb2e1cc87bc933 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-04-20T13:32:30Z (GMT) No. of bitstreams: 2 Dissertação - Daiany Priscilla Bueno da Silva - 2015.pdf: 1122736 bytes, checksum: fc98524b1ad5d0e3a0cb2e1cc87bc933 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2016-04-20T13:32:30Z (GMT). No. of bitstreams: 2 Dissertação - Daiany Priscilla Bueno da Silva - 2015.pdf: 1122736 bytes, checksum: fc98524b1ad5d0e3a0cb2e1cc87bc933 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-02-25 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / The piperazines derivatives are an important class of chemical compounds with a broad spectrum of biological activities such as anti-infectious activity, anti-carcinogenic, anti-nociceptive, anti-hypertensive, anxiolytic and vasorelaxant and are attractive candidates for development of new analgesics and anti-inflammatories drugs. The aim of this study was evaluate the effects of piperazine compound LQFM-008 (4-[(1-phenyl-1H-pyrazol-4-yl) methyl]1-piperazine carboxylic acid ethyl ester) in acute tests of nociception and inflammation and characterize that the mechanisms are involved in the antinociceptive effect. For this study were used male mice weighing between 25 and 35g. In the formalin test, the treatments with LQFM-008 at doses of 48 and 96 μmol/kg (p.o.) reduced the licking time at both neurogenic and inflammatory phases of this test. The anti-inflammatory activity was confirmed, since LQFM-008 at doses of 48 and 96 μmol/kg (p.o.) reduced the formation of paw edema induced by carrageenan at all hours of the test and LQFM-008 in pleurisy test at dose of 96 μmol/kg (p.o.) also reduced leukocyte migration and protein exudation. In the tail-flick and the hot plate tests, the treatment with LQFM-008 at doses of 48 and 96 μmol/kg (p.o.) increased the latency to thermal stimulus, suggesting the involvement of central mechanisms in the antinociceptive effect LQFM-008. The pre-treatment of animals with naloxone (7.5 μmol/kg s.c.) reversed the antinociceptive effect of LQFM-008 only in the first phase of the formalin test, however, the pre-treatment with NAN-190 (1.3 μmol/kg i.p.) and PCPA (500 μmol/kg i.p.) reversed the antinociceptive effect of LQFM-008 in both phases of the test. Thus, the piperazine derivative LQFM-008 exhibit antinociceptive and anti-inflammatory activities in acute test and the antinociceptive effect is resulting from a central action with involvement of opioid receptors and the serotonin pathway. / Os derivados piperazínicos constituem uma importante classe de compostos químicos com largo espectro de atividades biológicas, tais como atividade anti-infecciosa, anti-cancerígena, antinociceptiva, anti-hipertensiva, vasorrelaxante e ansiolítica, tornando-se candidatos atrativos para desenvolvimento de novos fármacos analgésicos e anti-inflamatórios. O objetivo do presente trabalho foi avaliar os efeitos do composto piperazínico LQFM-008 (4-((1-fenil-1H-pirazol-4-il) metil) piperazina-1-carboxilato) em testes agudos de nocicepção e inflamação, buscando caracterizar quais os mecanismos de ação estariam envolvidos no efeito antinociceptivo. Para este estudo foram utilizados camundongos machos, pesando entre 25 e 35g. No teste da formalina os tratamentos com LQFM-008 nas doses de 48 e 96 μmol/kg (v.o.) reduziram o tempo de reatividade à dor tanto na fase neurogênica quanto na fase inflamatória do teste. A atividade anti-inflamatória foi confirmada, uma vez que LQFM-008 nas doses de 48 e 96 μmol/kg (v.o.) reduziu a formação do edema de pata induzido por carragenina em todas as horas deste teste e no teste de pleurisia LQFM-008 na dose de 96 μmol/kg também reduziu a migração de leucócitos e a exsudação proteica. Nos testes de flexão de cauda e da placa quente, o tratamento com LQFM-008 48 e 96 μmol/kg (v.o.) aumentou a latência ao estímulo térmico, sugerindo o envolvimento de mecanismos centrais no efeito antinociceptivo de LQFM-008. O pré-tratamento dos animais com naloxona (7,5 μmol/kg s.c.) reverteu o efeito antinociceptivo de LQFM-008 apenas na primeira fase do teste da formalina, no entanto, os pré-tratamentos com NAN-190 (1,3 μmol/kg i.p.) e PCPA (500 μmol/kg i.p.) reverteram o efeito antinociceptivo de LQFM-008 em ambas as fases do teste. Assim o derivado piperazínico LQFM-008 apresenta atividade antinoceptiva e anti-inflamatória em testes agudos, sendo efeito antinociceptivo decorrente de uma ação central com envolvimento dos receptores opióides e da via serotoninérgica.

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