Utilização de animais em pesquisas: breve revisão da legislação no Brasil / Use of animals in research: a brief review of legislation in Brazil / Utilización de animales en la investigación: breve revisión de la legislación en Brasil

A utilização de animais para fins científicos configura prática histórica na civilização humana, mas gera polêmica em sociedades preocupadas com proteção dos animais. No Brasil, até 2008, não havia norma ou lei que regulamentasse especificamente a experimentação animal. Este trabalho discute a utilização de animais em experimentos científicos, considerando o delineamento da Lei Arouca, por meio da leitura de artigos científicos que contemplam o histórico da experimentação no contexto mundial e brasileiro, incluindo a regulamentação do uso de animais do filo Chordata, subfilo Vertebrata, em pesquisas no Brasil. A Lei Arouca pode representar avanço na legislação brasileira quanto à utilização de animais para fins científicos, sobretudo pela criação das comissões de ética para uso de animais em instituições de pesquisa e do Conselho Nacional de Controle de Experimentação Animal, que examinam o cumprimento da legislação aplicável em projetos científicos que envolvem a utilização de animais.

The use of animals for scientific purposes is a historical procedure in human civilization, but is controversial for societies concerned with the protection of animals. In Brazil, until 2008, there was no rule or law that specifically regulated animal testing. This paper discusses the use of animals in scientific experiments, considering the Brazilian Arouca Law, through the analysis of scientific articles that consider the history of experimentation in the world and in Brazil, including the regulation of the use of animals of the phylum Chordata, subphylum Vertebrata, in Brazilian research. The Arouca Law may represent an advance in Brazilian law regarding the use of animals for scientific purposes, particularly given the creation of the Ethics Committees for Animal Use in research institutions and the National Council for Animal Experimentation Control, which examine the compliance of scientific projects involving the use of such animals to applicable law.

El uso de animales para fines científicos configura una práctica histórica en la civilización humana, pero genera controversia en las sociedades preocupadas por la protección de éstos. En Brasil, hasta 2008, no había una norma o una ley que regulara la experimentación animal. Este trabajo discute acerca del uso de animales en experimentos científicos, teniendo en cuenta los lineamientos de la Ley Arouca, a partir de la lectura de artículos científicos que abordan la historia de la experimentación animal en el mundo y en el contexto brasilero, incluyendo la regulación del uso de animales del filo Cordados, subfilo Vertebrados, en investigaciones en Brasil. La Ley Arouca puede representar un avance en la legislación brasilera con respecto al uso de estos animales para fines científicos, sobre todo por la creación de las comisiones de ética para el uso de animales (Ceua) en instituciones de investigación y del Consejo Nacional de Control de la Experimentación Animal (Concea), que son los responsables de examinar el cumplimiento de la legislación aplicable a proyectos científicos que involucran la utilización de animales.

Dry Extract of Matricaria recutita L. (Chamomile) Prevents Ligature-Induced Alveolar Bone Resorption in Rats via Inhibition of Tumor Necrosis Factor-α and Interleukin-1ß.

BACKGROUND: Matricaria recutita L. (chamomile) has demonstrated anti-inflammatory activity. Accordingly, the ability of the Matricaria recutita extract (MRE) to inhibit proinflammatory cytokines and its influence on alveolar bone resorption (ABR) in rats. METHODS: Wistar rats were subjected to ABR by ligature with nylon thread in the second upper-left molar, with contralateral hemiarcade as control. Rats received polysorbate TW80 (vehicle) or MRE (10, 30, and 90 mg/kg) 1 hour before ligature and daily until day 11. The periodontium was analyzed by macroscopy, histometry, histopathology, and immunohistochemistry for the receptor activator of nuclear factor-kappa B ligand (RANKL), osteoprotegerin (OPG), and tartrate-resistant acid phosphatase (TRAP). The gingival tissue was used to quantify the myeloperoxidase (MPO) activity and tumor necrosis factor (TNF)-α and interleukin (IL)-1ß levels by enzyme-linked immunosorbent assay. Blood samples were collected to evaluate bone-specific alkaline phosphatase (BALP), leukogram, and dosages of aspartate and alanine transaminases, urea, and creatinine. Aspects of liver, kidneys, spleen, and body mass variations were also evaluated. RESULTS: The 11 days of ligature induced bone resorption, low levels of BALP, leukocyte infiltration; increase of MPO, TNF-α, and IL-1ß; immunostaining increase for RANKL and TRAP; reduction of OPG and leukocytosis, which were significantly prevented by MRE, except for the low levels of BALP and the leukocytosis. Additionally, MRE did not alter organs or body weights of rats. CONCLUSION: MRE prevented the inflammation and ABR by reducing TNF-α and IL-1ß, preventing the osteoclast activation via the RANKL-OPG axis, without interfering with bone anabolism.