Inflammation and increased aromatase expression occur in the breast tissue of obese women with breast cancer Journal Article
| Authors: | Morris, P. G.; Hudis, C. A.; Giri, D.; Morrow, M.; Falcone, D. J.; Zhou, X. K.; Du, B.; Brogi, E.; Crawford, C. B.; Kopelovich, L.; Subbaramaiah, K.; Dannenberg, A. J. |
| Article Title: | Inflammation and increased aromatase expression occur in the breast tissue of obese women with breast cancer |
| Abstract: | Obesity is a risk factor for the development of hormone receptor-positive breast cancer in postmenopausal women and has been associated with an increased risk of recurrence and reduced survival. In humans, obesity causes subclinical inflammation in visceral and subcutaneous adipose tissue, characterized by necrotic adipocytes surrounded by macrophages forming crown-like structures (CLS). Recently, we found increased numbers of CLS, activation of the NF-κB transcription factor, and elevated aromatase levels and activity in the mammary glands of obese mice. These preclinical findings raised the possibility that the obesity→inflammation axis is important for the development and progression of breast cancer. Here, our main objective was to determine if the findings in mouse models of obesity translated to women. Breast tissue was obtained from 30 women who underwent breast surgery. CLS of the breast (CLS-B) was found in nearly 50% (14 of 30) of patient samples. The severity of breast inflammation, defined as the CLS-B index, correlated with both body mass index (P < 0.001) and adipocyte size (P = 0.01). Increased NF-κB binding activity and elevated aromatase expression and activity were found in the inflamed breast tissue of overweight and obese women. Collectively, our results suggest that the obesity→inflammation→ aromatase axis is present in the breast tissue of most overweight and obese women. The presence of CLS-B may be a biomarker of increased breast cancer risk or poor prognosis. ©2011 AACR. |
| Keywords: | human tissue; protein expression; cancer growth; cancer risk; breast cancer; breast; inflammation; obesity; overweight; immunoglobulin enhancer binding protein; breast neoplasms; body mass index; nf-kappa b; body composition; electrophoretic mobility shift assay; carcinoma, intraductal, noninfiltrating; mammary gland; aromatase; medical records; subcutaneous fat; adipocytes |
| Journal Title: | Cancer Prevention Research |
| Volume: | 4 |
| Issue: | 7 |
| ISSN: | 1940-6207 |
| Publisher: | American Association for Cancer Research |
| Date Published: | 2011-07-01 |
| Start Page: | 1021 |
| End Page: | 1029 |
| Language: | English |
| DOI: | 10.1158/1940-6207.capr-11-0110 |
| PROVIDER: | scopus |
| PMCID: | PMC3131426 |
| PUBMED: | 21622727 |
| DOI/URL: | |
| Notes: | --- - "Export Date: 17 August 2011" - "Source: Scopus" |
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