Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior === CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior === Oral mucositis (OM) induced by antineoplasic drugs is an important, dose-limiting, and costly side effect of cancer therapy. Calotropis procera is a plant plant constitutively produce...

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Bibliographic Details
Main Author: Ana Paula Fragoso de Freitas
Other Authors: Mariana Lima Vale
Format: Others
Language:Portuguese
Published: Universidade Federal do Cearà 2011
Subjects:
Online Access:http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9245
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record_format oai_dc
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language Portuguese
format Others
sources NDLTD
topic FraÃÃo protÃica
Oral Mucositis
5-Fluorouracil
Calotropis procera
latex
protein fraction
inflammation
cancer chemotherapy
CIENCIAS DA SAUDE
spellingShingle FraÃÃo protÃica
Oral Mucositis
5-Fluorouracil
Calotropis procera
latex
protein fraction
inflammation
cancer chemotherapy
CIENCIAS DA SAUDE
Ana Paula Fragoso de Freitas
Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators
description CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior === CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior === Oral mucositis (OM) induced by antineoplasic drugs is an important, dose-limiting, and costly side effect of cancer therapy. Calotropis procera is a plant plant constitutively produces abundant latex that is reported to possess anti-inflammatory, bacteriolytic, insecticidal, analgesic properties. The present work aimed to describe the effect of laticifer proteins of Calotropis procera (LP) in the expression of pro-inflammatory cytokines and inducible enzymes, such as, cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) in the model of OM in Hamsters. OM was induced by two intraperitoneal (i.p.) administrations of 5-Fluorouracil (5-FU) on the 1st and 2nd days (60 and 40 mg/kg, respectively) in hamsters (n=5). LP (0,25; 1; 5 E 25 mg / kg) was injected i.p. 24h before and 24h after mechanical trauma of the cheek pouches. Control group received only saline. On the 10th day, the animals were sacrificed and tissues from the cheek pouches were harvested. Macroscopical and histopathological (inflammatory cell infiltration, edema, hemorrhage and the formation of ulcerations and abscess) analysis as well as immunohistochemistry for TNF-&#61537;, IL-1&#946;, iNOS and COX-2 was performed in the cheek pouch tissue. Kruskal Wallis/Dunn was used as statistical tests. P<0.05 was accepted. Ethics Committee 036/10. The LP significantly inhibited macroscopical and histopathological parameters when compared to control group with maximum effect in macroscopic scores reaching 75% and 66% of maximum effect at the histopathological evaluation. The MPO activity was also significantly inhibited by LP in 91% at the same dose (p<0,001) and also inhibited the lost weight of 5- FU induced-oral mucositis. The cheek pouches of hamsters submitted to OM showed marked immunostaining for TNF-&#61537;, IL-1&#946;, iNOS and COX-2 on inflamed conjunctive (Cj) and epithelial (Ep) tissue compared with the cheek pouches of the normal control group. LP caused considerable reduction in the immunostaining for TNF-&#61537; (62%,Cj; 70%,Ep), IL-1&#946; (87%,Cj; 80%,Ep), iNOS (82%Cj; 52%Ep) and COX-2 (70%,Cj; 100%,Ep) in the check pouches tissue when compared with the group of animals subjected to experimental mucositis that received saline instead of LP. These findings show anti-inflammatory effects of LP in 5-FU-induced OM. The protective effect could be supported by the reduction of the expression of pro-inflammatory cytokines, such as TNF-&#61537; and IL-1&#946; and the enzymes iNOS and COX-2. The protective mechanism appears to involve inhibition of the expression of iNOS, COX-2, TNF-&#61537;, and IL- 1&#946;. === Mucosite oral (MO) induzida por drogas antineoplÃsicas à um importante fator limitante da dose e efeitos colaterais da terapia do cÃncer. Calotropis procera à uma planta que produz lÃtex constitutivamente abundante que à relatado possuir propriedades antiinflamatÃrias, bactericidas, inseticidas, analgÃsicas. O presente trabalho teve como objetivo descrever o efeito das proteÃnas do lÃtex da Calotropis procera (LP) na expressÃo de citocinas prÃ-inflamatÃrias (TNF-&#945; e IL-1&#61538;) e enzimas induzÃveis, como, ciclooxigenase-2 (COX-2) e Ãxido nÃtrico sintase induzÃvel (NOSi) no modelo de MO em hamsters. A mucosite oral foi induzida por duas administraÃÃes intraperitoneal (i.p) de 5-fluorouracil (5-FU) no 1  e 2 dias nas doses de 60 e 40 mg/kg, respectivamente nos animais (n = 5). As LP (0,25; 1; 5 E 25 mg/kg) foi injetado via i.p. 24h antes e 24h apÃs o trauma mecÃnico da mucosa jugal. O grupo controle recebeu apenas soluÃÃo salina. No 10 dia, os animais foram sacrificados e os tecidos da mucosa jugal foram colhidos. Foram realizadas no tecido mucosa jugal as anÃlises macroscÃpicas e histopatolÃgicas (infiltraÃÃo de cÃlulas inflamatÃrias, edema, hemorragia e à formaÃÃo de ulceraÃÃes e abscessos), bem como a imunohistoquÃmica para TNF-&#945;, IL-1&#946;, NOSi e COX-2. Foram utilizados Kruskal Wallis / Dunn como testes estatÃsticos, onde P <0,05 foi aceito. O estudo foi submetido ao Comità de Ãtica sob o protocolo 036/10. Observou-se que a LP inibiu significativamente parÃmetros macroscÃpicos e histopatolÃgicos, quando comparado ao grupo controle, com efeito mÃximo nos escores macroscÃpicos atingindo 75% e 66% do efeito mÃximo na avaliaÃÃo histopatolÃgica. A atividade de Mieloperoxidase (MPO) tambÃm foi significativamente inibida por LP em 91% com a mesma dose (p <0,001) quando comparado ao grupo controle e tambÃm inibiu a perda de peso em animais submetidos a mucosite oral e tratados com LP. A mucosa jugal dos animais submetidos a MO mostrou imunomarcaÃÃo para TNF-&#945;, IL-1&#946;, NOSi e COX-2 na conjuntiva inflamada (Cj) e tecido epitelial (Ep) em comparaÃÃo com o tecido jugal do grupo normal. LP causou reduÃÃo considerÃvel na imunomarcaÃÃo para TNF-&#945; (62%, Cj, 70%, Ep), IL-1&#946; (87%, Cj, 80%, Ep), NOSi (82% Cj; Ep 52%) e COX -2 (70%, Cj, 100%, Ep) no tecido jugal quando comparado com o grupo de animais submetidos à mucosite experimental que receberam salina, em vez de LP. Esses achados demonstram efeitos anti-inflamatÃrios de LP em MO induzida por 5-FU. O efeito protetor poderia ser suportado pela reduÃÃo da expressÃo das citocinas prÃ-inflamatÃrias, como TNF-&#945; e IL-1&#946; e na expressÃo de enzimas COX-2 e NOSi. O mecanismo de proteÃÃo parece envolver a expressÃo inibitÃria da NOSi, COX-2, TNF-&#945; e IL-1&#946;.
author2 Mariana Lima Vale
author_facet Mariana Lima Vale
Ana Paula Fragoso de Freitas
author Ana Paula Fragoso de Freitas
author_sort Ana Paula Fragoso de Freitas
title Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators
title_short Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators
title_full Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators
title_fullStr Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators
title_full_unstemmed Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators
title_sort protein fraction of latex calotropis procera protects against induced oral mucositis 5-fluorouracil in hamsters through inhibition proinflammatory mediators
publisher Universidade Federal do CearÃ
publishDate 2011
url http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9245
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spelling ndltd-IBICT-oai-www.teses.ufc.br-63832019-01-21T22:57:52Z Protein fraction of latex Calotropis procera protects against induced oral mucositis 5-Fluorouracil in hamsters through inhibition proinflammatory mediators FraÃÃo protÃica do lÃtex da Calotropis procera protege contra a mucosite oral induzida por 5-Fluorouracil em hamsters atravÃs da inibiÃÃo de mediadores prÃ-inflamatÃrios Ana Paula Fragoso de Freitas Mariana Lima Vale Nylane Maria Nunes de Alencar Adriana Rolim Campos Barros FraÃÃo protÃica Oral Mucositis 5-Fluorouracil Calotropis procera latex protein fraction inflammation cancer chemotherapy CIENCIAS DA SAUDE CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior Oral mucositis (OM) induced by antineoplasic drugs is an important, dose-limiting, and costly side effect of cancer therapy. Calotropis procera is a plant plant constitutively produces abundant latex that is reported to possess anti-inflammatory, bacteriolytic, insecticidal, analgesic properties. The present work aimed to describe the effect of laticifer proteins of Calotropis procera (LP) in the expression of pro-inflammatory cytokines and inducible enzymes, such as, cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) in the model of OM in Hamsters. OM was induced by two intraperitoneal (i.p.) administrations of 5-Fluorouracil (5-FU) on the 1st and 2nd days (60 and 40 mg/kg, respectively) in hamsters (n=5). LP (0,25; 1; 5 E 25 mg / kg) was injected i.p. 24h before and 24h after mechanical trauma of the cheek pouches. Control group received only saline. On the 10th day, the animals were sacrificed and tissues from the cheek pouches were harvested. Macroscopical and histopathological (inflammatory cell infiltration, edema, hemorrhage and the formation of ulcerations and abscess) analysis as well as immunohistochemistry for TNF-&#61537;, IL-1&#946;, iNOS and COX-2 was performed in the cheek pouch tissue. Kruskal Wallis/Dunn was used as statistical tests. P<0.05 was accepted. Ethics Committee 036/10. The LP significantly inhibited macroscopical and histopathological parameters when compared to control group with maximum effect in macroscopic scores reaching 75% and 66% of maximum effect at the histopathological evaluation. The MPO activity was also significantly inhibited by LP in 91% at the same dose (p<0,001) and also inhibited the lost weight of 5- FU induced-oral mucositis. The cheek pouches of hamsters submitted to OM showed marked immunostaining for TNF-&#61537;, IL-1&#946;, iNOS and COX-2 on inflamed conjunctive (Cj) and epithelial (Ep) tissue compared with the cheek pouches of the normal control group. LP caused considerable reduction in the immunostaining for TNF-&#61537; (62%,Cj; 70%,Ep), IL-1&#946; (87%,Cj; 80%,Ep), iNOS (82%Cj; 52%Ep) and COX-2 (70%,Cj; 100%,Ep) in the check pouches tissue when compared with the group of animals subjected to experimental mucositis that received saline instead of LP. These findings show anti-inflammatory effects of LP in 5-FU-induced OM. The protective effect could be supported by the reduction of the expression of pro-inflammatory cytokines, such as TNF-&#61537; and IL-1&#946; and the enzymes iNOS and COX-2. The protective mechanism appears to involve inhibition of the expression of iNOS, COX-2, TNF-&#61537;, and IL- 1&#946;. Mucosite oral (MO) induzida por drogas antineoplÃsicas à um importante fator limitante da dose e efeitos colaterais da terapia do cÃncer. Calotropis procera à uma planta que produz lÃtex constitutivamente abundante que à relatado possuir propriedades antiinflamatÃrias, bactericidas, inseticidas, analgÃsicas. O presente trabalho teve como objetivo descrever o efeito das proteÃnas do lÃtex da Calotropis procera (LP) na expressÃo de citocinas prÃ-inflamatÃrias (TNF-&#945; e IL-1&#61538;) e enzimas induzÃveis, como, ciclooxigenase-2 (COX-2) e Ãxido nÃtrico sintase induzÃvel (NOSi) no modelo de MO em hamsters. A mucosite oral foi induzida por duas administraÃÃes intraperitoneal (i.p) de 5-fluorouracil (5-FU) no 1  e 2 dias nas doses de 60 e 40 mg/kg, respectivamente nos animais (n = 5). As LP (0,25; 1; 5 E 25 mg/kg) foi injetado via i.p. 24h antes e 24h apÃs o trauma mecÃnico da mucosa jugal. O grupo controle recebeu apenas soluÃÃo salina. No 10 dia, os animais foram sacrificados e os tecidos da mucosa jugal foram colhidos. Foram realizadas no tecido mucosa jugal as anÃlises macroscÃpicas e histopatolÃgicas (infiltraÃÃo de cÃlulas inflamatÃrias, edema, hemorragia e à formaÃÃo de ulceraÃÃes e abscessos), bem como a imunohistoquÃmica para TNF-&#945;, IL-1&#946;, NOSi e COX-2. Foram utilizados Kruskal Wallis / Dunn como testes estatÃsticos, onde P <0,05 foi aceito. O estudo foi submetido ao Comità de Ãtica sob o protocolo 036/10. Observou-se que a LP inibiu significativamente parÃmetros macroscÃpicos e histopatolÃgicos, quando comparado ao grupo controle, com efeito mÃximo nos escores macroscÃpicos atingindo 75% e 66% do efeito mÃximo na avaliaÃÃo histopatolÃgica. A atividade de Mieloperoxidase (MPO) tambÃm foi significativamente inibida por LP em 91% com a mesma dose (p <0,001) quando comparado ao grupo controle e tambÃm inibiu a perda de peso em animais submetidos a mucosite oral e tratados com LP. A mucosa jugal dos animais submetidos a MO mostrou imunomarcaÃÃo para TNF-&#945;, IL-1&#946;, NOSi e COX-2 na conjuntiva inflamada (Cj) e tecido epitelial (Ep) em comparaÃÃo com o tecido jugal do grupo normal. LP causou reduÃÃo considerÃvel na imunomarcaÃÃo para TNF-&#945; (62%, Cj, 70%, Ep), IL-1&#946; (87%, Cj, 80%, Ep), NOSi (82% Cj; Ep 52%) e COX -2 (70%, Cj, 100%, Ep) no tecido jugal quando comparado com o grupo de animais submetidos à mucosite experimental que receberam salina, em vez de LP. Esses achados demonstram efeitos anti-inflamatÃrios de LP em MO induzida por 5-FU. O efeito protetor poderia ser suportado pela reduÃÃo da expressÃo das citocinas prÃ-inflamatÃrias, como TNF-&#945; e IL-1&#946; e na expressÃo de enzimas COX-2 e NOSi. O mecanismo de proteÃÃo parece envolver a expressÃo inibitÃria da NOSi, COX-2, TNF-&#945; e IL-1&#946;. 2011-12-07 info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/masterThesis http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=9245 por info:eu-repo/semantics/openAccess application/pdf Universidade Federal do Cearà Programa de PÃs-GraduaÃÃo em CiÃncias MÃdicas UFC BR reponame:Biblioteca Digital de Teses e Dissertações da UFC instname:Universidade Federal do Ceará instacron:UFC