Avaliação do efeito da Artin M no processo de repação em mucosa mastigatória
Arquivos
Data
2011-11-30
Autores
Kim, Yeon Jung [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Artin M é uma lectina purificada de sementes de Artocarpus heterophyllus que, recentemente, mostrou-se capaz depromover aceleração da cicatrização de lesões por queimadura de pele ou por abrasão da córnea em ratos e coelhos. O objetivo desta tese foi avaliar os efeitos da Artin M no processo de reparação da mucosa mastigatória bucal, por meio de modelos de estudo in vivo. Primeiro estudo: Três feridas cirúrgicas circulares de 6 mm de diâmetro foram criadas na mucosa palatina de 20 cães, e divididas aleatoriamente em 3 grupos de acordo com os tratamentos: C – controle (não tratados), A - Artin M, V - veículo. Quatro animais de cada grupo foram sacrificados após 2, 4, 7, 14 e 21 dias póstratamento e suas maxilas analisadas clinicamente quanto ao padrão de cicatrização, seguido de análise histológica, imuno-histoquímica para antígeno nuclear de proliferação celular (PCNA) e atividade de mieloperoxidase. Clinicamente, o grupo A demonstrou melhor cicatrização em todos os períodos quando comparada aos outros grupos (p<0,05). A análise histológica mostrou ter havido no grupo A maior estimulação na produção de fibras colágenas, maturação do tecido de granulação e organização do epitélio. A imunolocalização de PCNA mostrou uma maior tendência na proliferação celular em lesões do grupo A principalmente nos dias iniciais (p<0,05). O influxo de neutrófilos mostrou-se estatisticamente aumentado no grupo A quando comparado aos outros grupos nos dias 2 e 4 (p<0,05). Conclui-se que a Artin M promoveu aceleração na reparação das feridas na mucosa mastigatória em cães, via recrutamento de neutrófilos e indução da proliferação celular. É bem conhecido o envolvimento de mediadores biológicos como citocinas...
Artin M, lectin from Artocarpus heterophyllus seeds, has been demonstrated to stimulate recruitment and activation of neutrophil and mast cells. Furthermore, it has been shown to accelerate the process of wound healing on burn injuries and corneal epithelial lesions in rats and rabbits, respectively. The aim of this study was to evaluate the effects of Artin M on wound healing in palatal mucosa in two animal models. Study 1: Three wounds of 6 mm full thickness were surgically created in the hard palate mucosa of twenty dogs. The wounds of each animal were randomly divided into three groups according to one of the treatment assigned: C– Control (nontreated), A- Artin M gel, and V– Vehicle (carboxymethylcellulose 3% gel). Four animals per group were sacrificed at 2, 4, 7, 14 and 21 days post-surgery. Before sacrifice, wounded areas were photographed and scored for macroscopic healing evaluation. Afterwards, maxillary tissue were harvested and divided to perform histological analysis, immunohistochemical staining against Proliferating Cell Nuclear Antigen (PCNA) and measurement of myeloperoxidase activity. Clinical analysis showed that wound closure was accelerated in group A in comparison to other groups in all periods. Histological features showed enhanced reepithelization and collagen fiber formation resulting in faster maturation of granular tissue in group A compared to the other groups, by day 14. Artin M treatment significantly induced cells proliferation at day 2 and 4 (p<0.05). Neutrophils infiltration in the group A was significantly higher than in the other groups at days 2 and 4 (p<0.05). The results suggest that Artin M gel may potentially facilitate wound healing on palatal mucosa via the recruitment of neutrophils and promotion of cells proliferation. It is well known that cytokines and growth... (Complete abstract click electronic access below)
Artin M, lectin from Artocarpus heterophyllus seeds, has been demonstrated to stimulate recruitment and activation of neutrophil and mast cells. Furthermore, it has been shown to accelerate the process of wound healing on burn injuries and corneal epithelial lesions in rats and rabbits, respectively. The aim of this study was to evaluate the effects of Artin M on wound healing in palatal mucosa in two animal models. Study 1: Three wounds of 6 mm full thickness were surgically created in the hard palate mucosa of twenty dogs. The wounds of each animal were randomly divided into three groups according to one of the treatment assigned: C– Control (nontreated), A- Artin M gel, and V– Vehicle (carboxymethylcellulose 3% gel). Four animals per group were sacrificed at 2, 4, 7, 14 and 21 days post-surgery. Before sacrifice, wounded areas were photographed and scored for macroscopic healing evaluation. Afterwards, maxillary tissue were harvested and divided to perform histological analysis, immunohistochemical staining against Proliferating Cell Nuclear Antigen (PCNA) and measurement of myeloperoxidase activity. Clinical analysis showed that wound closure was accelerated in group A in comparison to other groups in all periods. Histological features showed enhanced reepithelization and collagen fiber formation resulting in faster maturation of granular tissue in group A compared to the other groups, by day 14. Artin M treatment significantly induced cells proliferation at day 2 and 4 (p<0.05). Neutrophils infiltration in the group A was significantly higher than in the other groups at days 2 and 4 (p<0.05). The results suggest that Artin M gel may potentially facilitate wound healing on palatal mucosa via the recruitment of neutrophils and promotion of cells proliferation. It is well known that cytokines and growth... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Glicoproteinas, Periodontia, Mucosa bucal - Cicatrização, Oral mucosa, Periodontics, Glycoproteins
Como citar
KIM, Yeon Jung. Avaliação do efeito da Artin M no processo de repação em mucosa mastigatória. 2011. 110 f. Tese (Doutorado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araraquara, 2011.