Evaluation of the antimutagenic and anticarcinogenic effects of inulin in vivo

Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:29:55Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:32:43Z : No. of bitstreams: 1 2-s2.0-84880127116.pdf: 361753 bytes, checksum: 1b60406d23f93395410300ac40a6068f (MD5) Made available in DSpace on 2014-05-27T11:29:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-07-08 The incidence of colorectal cancer is growing worldwide. The characterization of compounds present in the human diet that can prevent the occurrence of colorectal tumors is vital. The oligosaccharide inulin is such a compound. The aim of this study was to evaluate the antigenotoxic, antimutagenic and anticarcinogenic effects of inulin in vivo. Our study is based on 3 assays that are widely used to evaluate chemoprevention (comet assay, micronucleus assay, and aberrant crypt focus assay) and tests 4 protocols of treatment with inulin (pre-treatment, simultaneous, post-treatment, and pre + continuous). Experiments were carried out in Swiss male mice of reproductive age. In order to induce DNA damage, we used the pro-carcinogenic agent 1,2-dimethylhydrazine. Inulin was administered orally at a concentration of 50 mg/kg body weight following the protocols mentioned above. Inulin was not administered to the control groups. Our data from the micronucleus assay reveal antimutagenic effects of inulin in all protocols. The percentage of inulin-induced damage reduction ranged from 47.25 to 141.75% across protocols. These data suggest that inulin could act through desmutagenic and bio-antimutagenic mechanisms. The anticarcinogenic activity (aberrant crypt focus assay) of inulin was observed in all protocols and the percentages of damage reduction ranged from 55.78 to 87.56% across protocols. Further tests, including human trials, will be necessary before this functional food can be proven to be effective in the prevention and treatment of colon cancer. © FUNPEC-RP. Centro de Estudos em Nutrição e Genética Toxicológica Centro Universitário Filadélfia, Londrina, PR Instituto de Biociências de Rio Claro Universidade Estadual Paulista, Rio Claro, SP Centro de Estudos em Celulas Tronco, Terapia Celular e Genética Toxicologica - CeTroGen Núcleo de Hospital Universitário Universidade Federal de Mato Grosso do Sul, Campo Grande, MS Centro de Ciências Biológicas e da Saúde Universidade Federal de Mato Grosso do Sul, Campo Grande, MS Departamento de Biologia Centro de Ciências Biológicas Universidade Estadual de Londrina, Londrina, PR Centro de Ciências da Saúde Departamento de Ciências Farmacêuticas Universidade Estadual de Londrina, Londrina, PR Universidade Federal de Mato Grosso do Sul, Campo Grande, MS Instituto de Biociências de Rio Claro Universidade Estadual Paulista, Rio Claro, SP