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Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats

  • Authors:
    • Yuichi Kinoshita
    • Masahiro Yoshioka
    • Yuko Emoto
    • Takashi  Yuri
    • Michiko Yuki
    • Chihiro  Koyama
    • Akiko Takenouchi
    • Kei  Hamazaki
    • Airo Tsubura
    • Katsuhiko Yoshizawa
  • View Affiliations / Copyright

    Affiliations: Division of Central Laboratory of Medicine and Pathology, Wakayama Medical University Hospital, Wakayama 641‑8510, Japan, Department of Nutrition, Koshien University, Takarazuka, Hyogo 665‑0006, Japan, Ethics Review Center, Kansai Medical University, Hirakata, Osaka 573‑1010, Japan, Department of Pathology, Hyogo College of Medicine, Nishinomiya, Hyogo 663‑8501, Japan, Department of Innovative Food Sciences, School of Food Sciences and Nutrition, Mukogawa Women's University, Nishinomiya, Hyogo 663‑8558, Japan, Department of Public Health, Faculty of Medicine, University of Toyama, Toyama 930‑0194, Japan, Department of Pathology, Osaka Prefectural Saiseikai Izuo Hospital, Osaka 551‑0032, Japan
    Copyright: © Kinoshita et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 7
    |
    Published online on: September 2, 2020
       https://doi.org/10.3892/ijfn.2020.7
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Abstract

In the present study, the dietary effects of mead acid (MA; 5,8,11‑eicosatrienoic acid) on 7,12‑dimethylbenz[a]anthracene (DMBA)‑induced breast cancer in female Sprague‑Dawley rats were examined. The 2.4 and 4.8% MA diets were commenced when the rats were 6 weeks of age. DMBA was administered by a single oral ingestion when the rats were 7 weeks of age, and the rats were maintained on the respective diets until 19 weeks of age. Tumor weight, histopathology, cell kinetics, and the fatty acid composition in breast tissue and serum were examined. In the control (CTR) group, the DMBA‑exposed rats were fed a basal diet (0% MA). The results revealed that there were no significant differences in tumor incidence, cell kinetics and in the N‑6/N‑3 ratio in breast tissue between the groups. Only the N‑6/N‑3 ratio of fatty acid composition in serum was significantly decreased in the 2.4% MA diet group. In previous studies, the 2.4% MA diet was shown to suppress N‑methyl‑N‑nitrosourea‑induced luminal A mammary cancer by decreasing cancer cell proliferation. The findings of the present study differ from those of previous studies with different breast cancer models. To further clarify the effects of MA against breast carcinogenesis, further investigations with different experimental breast cancer models are recommended.
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Copy and paste a formatted citation
Spandidos Publications style
Kinoshita Y, Yoshioka M, Emoto Y, Yuri T, Yuki M, Koyama C, Takenouchi A, Hamazaki K, Tsubura A, Yoshizawa K, Yoshizawa K, et al: Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats. Int J Funct Nutr 1: 7, 2020.
APA
Kinoshita, Y., Yoshioka, M., Emoto, Y., Yuri, T., Yuki, M., Koyama, C. ... Yoshizawa, K. (2020). Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats. International Journal of Functional Nutrition, 1, 7. https://doi.org/10.3892/ijfn.2020.7
MLA
Kinoshita, Y., Yoshioka, M., Emoto, Y., Yuri, T., Yuki, M., Koyama, C., Takenouchi, A., Hamazaki, K., Tsubura, A., Yoshizawa, K."Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats". International Journal of Functional Nutrition 1.2 (2020): 7.
Chicago
Kinoshita, Y., Yoshioka, M., Emoto, Y., Yuri, T., Yuki, M., Koyama, C., Takenouchi, A., Hamazaki, K., Tsubura, A., Yoshizawa, K."Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats". International Journal of Functional Nutrition 1, no. 2 (2020): 7. https://doi.org/10.3892/ijfn.2020.7
Copy and paste a formatted citation
x
Spandidos Publications style
Kinoshita Y, Yoshioka M, Emoto Y, Yuri T, Yuki M, Koyama C, Takenouchi A, Hamazaki K, Tsubura A, Yoshizawa K, Yoshizawa K, et al: Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats. Int J Funct Nutr 1: 7, 2020.
APA
Kinoshita, Y., Yoshioka, M., Emoto, Y., Yuri, T., Yuki, M., Koyama, C. ... Yoshizawa, K. (2020). Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats. International Journal of Functional Nutrition, 1, 7. https://doi.org/10.3892/ijfn.2020.7
MLA
Kinoshita, Y., Yoshioka, M., Emoto, Y., Yuri, T., Yuki, M., Koyama, C., Takenouchi, A., Hamazaki, K., Tsubura, A., Yoshizawa, K."Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats". International Journal of Functional Nutrition 1.2 (2020): 7.
Chicago
Kinoshita, Y., Yoshioka, M., Emoto, Y., Yuri, T., Yuki, M., Koyama, C., Takenouchi, A., Hamazaki, K., Tsubura, A., Yoshizawa, K."Dietary effect of mead acid on DMBA‑induced breast cancer in female Sprague‑Dawley rats". International Journal of Functional Nutrition 1, no. 2 (2020): 7. https://doi.org/10.3892/ijfn.2020.7
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