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Войти в исследования Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology · 2014
Systemic toxic effects during early phases of topical 4-NQO-induced oral carcinogenesis in rats.
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Barcessat Ana Rita Ribeiro, Huang Isaac, Rabelo Gustavo Davi, Rosin Flávia Cristina Perillo, Ferreira Luciana Gonçalves Valente, de Cerqueira Luz João Gualberto, Corrêa Luciana
Аннотация
BACKGROUND: Most studies have demonstrated 4-NQO toxicity to oral epithelium during oral carcinogenesis induction, but systemic toxicity has been poorly addressed. The aim of this study was to describe the systemic effect of 4-NQO topical application during early phases of oral cancer induction.
METHODS: A 4-NQO propylene glycol ointment was topically applied on the rat tongue three times a week for 16 weeks. Local and systemic 4-NQO toxicity was evaluated by body weight gain, hematology, and serum chemistry analyses, histopathology, and proliferating cell nuclear antigen (PCNA) immunohistochemistry.
RESULTS: Significant reduction in body weight gain and in white blood cell count as well as significant increase in serum ALT and AST was observed after 16 weeks of 4-NQO topical application. Focal hepatic lobular necrosis, renal tubular degeneration, and decreased cellularity in the splenic white pulp were also detected.
CONCLUSIONS: 4-NQO topical application on the tongue of rats for 16 weeks seems to have caused hepatic, renal, and splenic toxicity. Potential systemic toxicity should be considered to monitor for variables that could interfere in topical oral carcinogenesis experiments.
METHODS: A 4-NQO propylene glycol ointment was topically applied on the rat tongue three times a week for 16 weeks. Local and systemic 4-NQO toxicity was evaluated by body weight gain, hematology, and serum chemistry analyses, histopathology, and proliferating cell nuclear antigen (PCNA) immunohistochemistry.
RESULTS: Significant reduction in body weight gain and in white blood cell count as well as significant increase in serum ALT and AST was observed after 16 weeks of 4-NQO topical application. Focal hepatic lobular necrosis, renal tubular degeneration, and decreased cellularity in the splenic white pulp were also detected.
CONCLUSIONS: 4-NQO topical application on the tongue of rats for 16 weeks seems to have caused hepatic, renal, and splenic toxicity. Potential systemic toxicity should be considered to monitor for variables that could interfere in topical oral carcinogenesis experiments.
Предметные рубрики MeSH
4-Nitroquinoline-1-oxideAdministration, TopicalAlanine TransaminaseAnimalsAspartate AminotransferasesBlood Chemical AnalysisCarcinogenesisCarcinogensFemaleKeratinocytesKidney TubulesLeukocyte CountLeukoplakia, OralLiverMonocytesPancreasPrecancerous ConditionsProliferating Cell Nuclear AntigenQuinolonesRatsRats, WistarSerum AlbuminSpleenSubmandibular GlandTongueTongue NeoplasmsWeight Gain