Molecular Nutrition and Food Research
Molecular Nutrition and Food Research
5 years ago

Genistein and enterolactone in relation to Ki-67 expression and HER2 status in postmenopausal breast cancer patients

Genistein and enterolactone in relation to Ki-67 expression and HER2 status in postmenopausal breast cancer patients
Esther Herpel, Stefanie Jaskulski, Jenny Chang-Claude, Anja Rudolph, Audrey Y. Jung, Peter Sinn, Kathrin Thöne, Theron Johnson
Scope Phytoestrogens (PE) may improve breast cancer prognosis by modifying tumor prognostic markers, such as cell proliferation marker Ki-67 and human epidermal growth factor receptor 2 (HER2). Epidemiological evidence linking lignans and isoflavones to Ki-67 and HER2 is limited. We examined associations between the major metabolites of lignans and isoflavones – enterolactone (ENL) and genistein (GEN) – respectively, and Ki-67 expression and HER2 in tumor tissue of breast cancer patients. Methods and results Data from 1060 invasive breast cancer patients from the population-based MARIE study were used. Multivariate-adjusted linear (Ki-67 log-transformed) and quantile regression, and logistic regression analyses (HER2, Ki-67 dichotomized) were performed to calculate β estimates and ORs, respectively. Median post-diagnostic ENL and GEN concentrations were 19.5 and 4.8 nmol/L, respectively. Median Ki-67 was 12.0%, and 21.2% of the tumors were HER2+. After adjustment, there was an inverse association between GEN and Ki-67 at high expression levels (OR for Ki-67 ≥20% versus <20% of 0.93 (95%CI [0.87;0.99]) per 10 nmol/L GEN increment). Conclusion Our findings indicate an inverse association between GEN and Ki-67 at high levels of Ki-67 expression. Additional investigations are recommended to confirm our findings and to further elucidate mechanisms linking PE metabolites to breast cancer survival. A high dietary intake of phytoestrogens (such as oilseeds, whole grains, and soy products) may improve survival after breast cancer diagnosis by modifying tumor markers that are known to be predictors of survival. We have found that when one of these tumor markers indicative of cell proliferation is very highly expressed in postmenopausal breast cancer patients, higher soy intake, as assessed in blood, is linked to a decreased expression of this tumor marker.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/mnfr.201700449

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.