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Regulation of zinc transporters by dietary zinc supplement in breast cancer

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Abstract

Zinc is essential for cell growth and is a co-factor for more than 300 enzymes, representing over 50 different enzyme classes. Two gene families have been identified involved in zinc homeostasis. ZnT transporters reduce intracellular zinc while ZIP transporters increase intracellular zinc. Previous studies have shown that zinc concentration in breast cancer tissues is higher than that in normal breast tissues. However, the mechanisms involved and the relations to zinc transporters are still unknown. A series of zinc transporters are characterized in this article and several of that are emphasized in view of their unique tissue-specific expressions. Established human breast cancer in a nude mice model is used. With a dietary zinc supplement treatment, ZnT-1 mRNA expression in established human breast cancer is raised by 24%, and is nearly 2 times of that in basal diet. ZIP1, ZIP2 and LIV-1 mRNA are the same between two treatment groups. Moreover, no significant changes of these zinc transporters expressions are found between differential breast cancer cell lines in the nude mice model. This is the first report, which detects the zinc transporters expressions in established human breast cancer in nude mice model. These results lead to the constitutive expression and response to zinc in different tissues. In addition to that, ZnT-1 seems to have played an important role in zinc homeostasis, even in breast cancer.

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Abbreviations

BD:

Basal diet

EDTA:

Ethylene diamine tetraacetie acid

ER:

Estrogen receptor

ZIP:

Zrt- and Irt-like proteins

ZnT:

Zinc transporter

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Authors and Affiliations

  1. Institute of Biochemistry and Molecular Biology, School of Medicine, Shandong University, Jinan, 250012, China

    Daoxu Sun, Lianying Zhang, Xiaolei Wang, Xiaoyan Hu, Fu-ai Cui & Feng Kong

  2. Breast Center, Shandong Cancer Hospital and Institute, Jinan, 250036, China

    Yongsheng Wang

Authors
  1. Daoxu Sun
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  2. Lianying Zhang
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  3. Yongsheng Wang
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  4. Xiaolei Wang
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  5. Xiaoyan Hu
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  6. Fu-ai Cui
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  7. Feng Kong
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Correspondence to Lianying Zhang.

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Sun, D., Zhang, L., Wang, Y. et al. Regulation of zinc transporters by dietary zinc supplement in breast cancer. Mol Biol Rep 34, 241–247 (2007). https://doi.org/10.1007/s11033-007-9082-6

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  • DOI: https://doi.org/10.1007/s11033-007-9082-6

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