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Matricaria recutita prevents ligature-induced osteoclastic alveolar bone loss induced in rats via inhibition of TNFa and IL-1β cytokines / A Matricaria recutita previne a perda Ãssea alveolar osteoclÃstica induzida por ligadura em ratos via inibiÃÃo das citocinas TNF-a E IL-1b

CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior / Periodontitis is an immunoinflammatory disease in that the involvement of chemical mediators culminates in destruction of alveolar bone. Long recognized regarding its pathogenesis, however, frequently some patients do not respond insatisfactorily to conventional treatments, which makes pharmacological alternatives are sought. In this context, Matricaria recutita (MTR), known as chamomile, stands out in the literature for its anti-inflammatory and a variety of constituents, especially apigenin (APG) flavonoid. Thus, the present study evaluated the involvement of cytokines in the anti-inflammatory and antiresorptive activities of MTR in alveolar bone resorption (ABR) induced by ligature in rats. For this, we used the dry extract of MTR (apigenin content 128.5Â0.99 mg/g). The ABR was induced in 90 wistar rats (199.3  3.2 g) by ligation (nylon 3.0) of 2 upper left molar, and contralateral was used as control. The rats received v.o. Tween 80 (TW) or MTR (10, 30 and 90 mg/kg) daily until 11 d, when they were killed. The hemiarcadas were processed for macroscopic (mm2) or histometric, histological and immunohistochemical analyzes for the ligand of the receptor activator of nuclear factor kappa B (RANKL), osteoprotegerin (OPG) and tartrate-resistant acid phosphatase (TRAP). Blood samples were collected for measurement of bone alkaline phosphatase (BALP), while the gingival tissue was used for measuring of mieloperoxidase activity (MPO; mg/g) and of tumor necrosis factor-alpha (TNF-a) and interleukin-1&#946; (IL-1&#946;) levels (pg/mg) by ELISA. Systemically, serum bone alkaline phosphatase (BALP), AST/ALT, urea and creatinine, and white blood count were made, and we evaluated of macroscopic aspects of liver, kidneys and spleen, in addition to variation in body mass. Was set at p <0.05 (#) for Normal, (*) for TW and (&#61540;) for MTR 10 mg/kg; Ethical aspects: the Ethics Committee for Animal Use-UFC 70/13. It was found that ligation for 11 days caused intense ABR with furcation lesion pronounced, resorption of alveolar bone and cementum in the region between the first and second molars, reduction of serum BALP, intense leukocyte infiltrate in the periodontium these animals, increasing significant MPO, TNF-&#61537;, IL-1&#946; in challenged area underlying gingival tissue, and increased to RANKL and TRAP immunostaining, and reduced to OPG. Systemically, there was leukocytosis with a predominance of mononuclear cells. No major changes in organs and weight of animals were observed. MTR prevented, significantly, the ligature-induced ABR [TW=5.5Â0.2; MTR (10)=4.4Â0.1*; (30)=2.9Â0.1*&#61540;; (90)=2.8Â0*&#61540;], corroborating the reduction of furcation lesions [Normal=10.4Â0.8; TW=137.4Â23.3#; MTR (90)=81.0Â9.6*#] and the preservation of the alveolar bone and cementum [(Normal=0(0-0); TW=3(1-3)#, MTR (90)=1(1-3)#*] compared to the TW group while no bone anabolic activity was showed because MTR dit not prevent the reduction of serum BALP induced by ligature [Normal=99.4Â3.4; TW=61.3Â2.6#; MTR (10)=70.6Â3.6#; (30)=74.5Â3.7#; (90)=78.5Â2.8#); p>0.05]. However, MTR significantly prevented the leukocyte infiltration and the increase of MPO activity [Normal=3.6Â0.5; TW=9.4Â0.9#; MTR (10)=10.2Â3.3; (30)=4.5Â0.8*; (90)=4.2Â0.7*], of TNF-a [Normal=0.2Â0; TW=1.2Â0.2#; MTR (10)=0.4Â0.2*; (30)=0.2Â0.1*; (90)=0.1Â0*] and of IL-1&#946; [Normal=1.5Â0.3; TW=8.0Â1.4#; MTR (10)=8.9Â1.9#; (30)=1.8Â1.0*&#61540;; (90)=1.5Â0.9*&#61540;] levels caused by ligature, and reduced immunostaining for RANKL and TRAP, and increased for OPG, comparing to TW group. Additionally, MTR prevented the leukocytosis caused by ligation and did not alter liver, kidney, spleen conditions or the variation of body mass. In short, the MTR prevented the ABR by reducing TNF-a and IL-1&#946;, thus preventing the osteoclast activation due RANK-RANKL-OPG axis, without interfering with bone anabolism. / A periodontite à uma doenÃa imunoinflamatÃria onde a participaÃÃo de mediadores quÃmicos culmina em destruiÃÃo de osso alveolar. Muito se reconhece a respeito de sua patogÃnese, contudo, frequentemente alguns pacientes respondem de forma insatisfatÃria aos tratamentos convencionais, o que faz com que alternativas farmacolÃgicas sejam buscadas. Neste contexto, a Matricaria recutita (MTR), conhecida como camomila, destaca-se na literatura por sua propriedade anti-inflamatÃria e sua variedade de constituintes, especialmente o flavonoide apigenina. Assim, o presente estudo avaliou a participaÃÃo de citocinas nas atividades anti-inflamatÃria e antirreabsortiva da MTR na reabsorÃÃo Ãssea alveolar (POA) induzida por ligadura em ratos. Para isso, utilizou-se extrato seco de MTR (teor de apigenina de 128,5Â0,99 mg/g). A POA foi induzida em 90 ratos Wistar (199,3Â3,2 g) por ligadura (nÃilon 3.0) do 2 molar superior esquerdo, e contralateral como controle. Os ratos receberam v.o. Tween 80 (TW) ou MTR (10, 30 e 90 mg/kg) diariamente atà o 11 d, quando foram mortos. As hemiarcadas foram processadas para macroscopia (mm2) ou para anÃlises histomÃtrica, histolÃgica e imunohistoquÃmica para o ligante do receptor ativador do fator nuclear kappa-B (RANKL), a osteoprotegerina (OPG) e a fosfatase Ãcida resistente ao tartarato (TRAP). Amostras de sangue foram coletadas para dosagem de fosfatase alcalina Ãssea (FAO), enquanto que o tecido gengival foi utilizado para a dosagem da atividade de mieloperoxidase (MPO; mg/g), do fator de necrose tumoral-alfa (TNF-a) e da interleucina-1&#946; (IL-1&#946;) (pg/mg) por ELISA. Sistemicamente, foram feitas dosagens sÃricas AST/ALT, ureia e creatinina, avaliados leucograma, os aspectos macroscÃpicos de fÃgado, rins e baÃo, alÃm da variaÃÃo de massa corpÃrea. Considerou-se p<0,05 (#) para Normais, (*) para TW e (&#61540;) para MTR 10 mg/kg; Aspectos Ãticos: ComissÃo de Ãtica para Uso de Animais-UFC n 70/13. Verificou-se que a ligadura durante 11 dias causou intensa POA, com lesÃo pronunciada de furca e reabsorÃÃo de osso alveolar e cemento na regiÃo entre o primeiro e segundo molares, reduÃÃo dos nÃveis sÃricos de FAO, intenso infiltrado leucocitÃrio no periodonto destes animais, aumento significante de MPO, de TNF-a, de IL-1&#946; no tecido gengival subjacente à Ãrea desafiada, alÃm de imunomarcaÃÃo aumentada para RANKL e TRAP, e reduzida para OPG. Sistemicamente, observou-se leucocitose com predomÃnio de mononucleares. NÃo foram observadas alteraÃÃes importantes de ÃrgÃos e peso dos animais. MTR foi capaz de prevenir, de forma significante, a POA induzida por ligadura [TW=5,5Â0,2; MTR (10)=4,4Â0,1*; (30)=2,9Â0,1*&#61540;; (90)=2,8Â0*&#61540;], sendo corroborada pela reduÃÃo das lesÃes de furca [Normal=10,4Â0,8; TW=137,4Â23,3#; MTR (90)=81,0Â9,6#*] e preservaÃÃo de osso alveolar e cemento [(Normal=0(0-0); TW=3(1-3)#; MTR (90)=1(1-3)#*] em comparaÃÃo ao grupo TW, embora nÃo demonstrou atividade anabÃlica Ãssea por nÃo prevenir a reduÃÃo dos nÃveis sÃricos de FAO induzida pela ligadura [Normal=99,4Â3,4; TW=61,3Â2,6#; MTR (10)=70,6Â3,6#; (30)=74,5Â3,7#; (90)=78,5Â2,8#); p>0,05]. Entretanto, MTR preveniu significantemente o infiltrado leucocitÃrio e o aumento da atividade de MPO [Normal=3,6Â0,5; TW=9,4Â0,9#; MTR (10)=10,2Â3,3; (30)=4,5Â0,8*; (90)=4,2Â0,7*], dos nÃveis de TNF-a [Normal=0,2Â0; TW=1,2Â0,2#; MTR (10)=0,4Â0,2*; (30)=0,2Â0,1*; (90)=0,1Â0*] e de IL-1&#946; [Normal=1,5Â0,3; TW=8,0Â1,4#; MTR (10)=8,9Â1,9#; (30)=1,8Â1,0*&#61540;; (90)=1,5Â0,9*&#61540;], proporcionando imunomarcaÃÃo reduzida para RANKL e TRAP, e aumentada para OPG, em comparaÃÃo ao grupo TW. Adicionalmente, a MTR preveniu a leucocitose causada pela ligadura e nÃo alterou as condiÃÃes hepÃticas, renais, esplÃnicas e a variaÃÃo de massa corpÃrea. Em suma, a MTR preveniu a POA via reduÃÃo de TNF-a e IL-1&#946;, prevenindo, assim, a ativaÃÃo osteoclÃstica decorrente do eixo RANK-RANKL-OPG, sem interferir no anabolismo Ãsseo.

Identiferoai:union.ndltd.org:IBICT/oai:www.teses.ufc.br:8830
Date27 November 2014
CreatorsMariana Vasconcelos GuimarÃes
ContributorsVilma de Lima, Ronaldo de Albuquerque Ribeiro, SÃrgio Luis da Silva Pereira
PublisherUniversidade Federal do CearÃ, Programa de PÃs-GraduaÃÃo em Odontologia, UFC, BR
Source SetsIBICT Brazilian ETDs
LanguagePortuguese
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis
Formatapplication/pdf
Sourcereponame:Biblioteca Digital de Teses e Dissertações da UFC, instname:Universidade Federal do Ceará, instacron:UFC
Rightsinfo:eu-repo/semantics/openAccess

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