Medical Oncology

, 35:54 | Cite as

Protective effects of purple carrot extract (Daucus carota) against rat tongue carcinogenesis induced by 4-nitroquinoline 1-oxide

  • Glaucia Resende Soares
  • Carolina Foot Gomes de Moura
  • Marcelo Jose Dias Silva
  • Wagner Vilegas
  • Aline Boveto Santamarina
  • Luciana Pellegrini Pisani
  • Debora Estadella
  • Daniel Araki Ribeiro
Original Paper


The aim of this study was to evaluate the chemopreventive potential of purple carrot extract following rat tongue carcinogenesis induced by 4-nitroquinoline 1-oxide (4NQO). For this purpose, histopathological analysis, proliferative status, antioxidant activity and inflammatory status were investigated in this setting. A total of 20 male rats were distributed into four groups as follows (n = 5 per group): Group 1—free access to water and commercial diet for 12 weeks; Group 2—received 4NQO at 50 ppm dose in drinking water daily and commercial diet for 12 weeks; Group 3—free access to water and received diet supplemented with purple carrot extract (0.1 g/kg) for 12 weeks; and Group 4—received 4NQO at 50 ppm dose in drinking water daily and diet supplemented with purple carrot extract (0.1 g/kg) for 12 weeks. Histopathological analysis revealed that animals treated with purple carrot extract reduced the oral lesions such as dysplasia and squamous cell carcinoma. Animals with oral pre-neoplastic lesions and treated with purple carrot extract decreased ki-67 and 8-OHdG immunoexpression. Moreover, pNFκBp50 and MyD88 protein expressions were decreased after purple carrot treatment associated or not with 4NQO exposure. SOD-Mn mRNA levels increased with treatment with purple carrot extract as well. In conclusion, our results demonstrated that purple carrot extract was able to protect oral lesions induced by 4NQO in Wistar rats as a result of antioxidant activity, anti-inflammatory potential and antiproliferative and antimutagenic actions.


Oral cancer Rat 4-Nitroquinoline 1-oxide Purple carrot Chemopreventive studies 



GRS and CFGM are recipients of CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior) fellowship. DAR and WV are recipients of CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico) fellowship. MJDS is a recipient of FAPESP (Fundação de Amparo a Pesquisa do Estado de São Paulo) fellowship.

Compliance with ethical standards

Conflict of interest

None declared.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Glaucia Resende Soares
    • 1
  • Carolina Foot Gomes de Moura
    • 1
  • Marcelo Jose Dias Silva
    • 2
  • Wagner Vilegas
    • 2
  • Aline Boveto Santamarina
    • 1
  • Luciana Pellegrini Pisani
    • 1
  • Debora Estadella
    • 1
  • Daniel Araki Ribeiro
    • 1
  1. 1.Department of BiosciencesFederal University of São Paulo (UNIFESP)SantosBrazil
  2. 2.Sao Paulo State University (UNESP)São VicenteBrazil

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