Over the past twenty years, studies have shown that epithelial cancers grow in a specific environment characterized by tumor-induced changes ofthe infiltrating immune cells. This symbiotic relationship is critical for tumor growth and more importantly for tumor metastasis. Clearly a better understanding of these processes and the tumor types associated with each is critical to enhancing our understanding and treatment of malignant disease. During that same time period, it has been clear that the traditional approach to evaluate breast cancer using tumor histology does not adequately reflect the diversity of biology and the heterogeneity of this disease. As a result, new approaches to classifying breast cancer have been generated. The most commonly used, pioneered by this SPORE program, utilizes the expression of an intrinsic set of genes generated using cDNA microarray technology. Four different intrinsic subtypes were described-luminal A, HER-2-enriched, basal-like and normal-breast like. Interestingly, these different subtypes were associated with different clinical outcomes. Most recently, the Perou laboratory has identified a fifth subtype that is enriched in genes associated with tumor initiating cells and epithelial to mesenchymal transition. Patients with this subtype termed "claudin-low" have the poorest survival compared to patients with the other intnnsic subtypes. Our group has found that the claudin-low subtype, medullary cancer and some basal-like tumors are heavily infiltrated with immune cells. Quite recently we have found that the immune Infiltrate is critical to the growth and metastasis of these tumors. The immune infiltration by T and B cells, macrophages, NK cells and myeloid-derived suppressor cells is due to the generation by these tumors and the surrounding stroma of proteins important in migration and invasion. The current project will focus on enhancing our understanding of how these immune cells potentiate local and metastatic tumor grov^h of claudin-low, medullary cancer and basal-like tumors. Additionally, we will use therapies that specifically target these immune cells in combination with conventional therapies as a novel approach to the treatment of these tumors.

Public Health Relevance

Breast cancer is the most common malignancy in women in the United States and the second leading cause of malignant death. We have found that a new subtype, claudin-low, are heavily infiltrated with immune cells, which are critical to the growth of these tumors. The current project seeks to understand how these immune cells regulate tumor growth and to target immune and tumor cells as a novel approach to therapy.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Specialized Center (P50)
Project #
5P50CA058223-21
Application #
8723745
Study Section
Special Emphasis Panel (ZCA1-RPRB-0)
Project Start
Project End
Budget Start
2014-09-01
Budget End
2015-08-31
Support Year
21
Fiscal Year
2014
Total Cost
$182,145
Indirect Cost
Name
University of North Carolina Chapel Hill
Department
Type
DUNS #
608195277
City
Chapel Hill
State
NC
Country
United States
Zip Code
27599
Ruiz-Narváez, Edward A; Haddad, Stephen A; Lunetta, Kathryn L et al. (2016) Gene-based analysis of the fibroblast growth factor receptor signaling pathway in relation to breast cancer in African American women: the AMBER consortium. Breast Cancer Res Treat 155:355-63
Cheng, Ting-Yuan David; Ambrosone, Christine B; Hong, Chi-Chen et al. (2016) Genetic variants in the mTOR pathway and breast cancer risk in African American women. Carcinogenesis 37:49-55
Murphy, Caitlin C; Sandler, Robert S; Sanoff, Hanna K et al. (2016) Decrease in Incidence of Colorectal Cancer Among Individuals 50 Years or Older After Recommendations for Population-based Screening. Clin Gastroenterol Hepatol :
Sun, Xuezheng; Nichols, Hazel B; Tse, Chiu-Kit et al. (2016) Association of Parity and Time since Last Birth with Breast Cancer Prognosis by Intrinsic Subtype. Cancer Epidemiol Biomarkers Prev 25:60-7
Li, Hui; Zhu, Yitan; Burnside, Elizabeth S et al. (2016) Quantitative MRI radiomics in the prediction of molecular classifications of breast cancer subtypes in the TCGA/TCIA data set. NPJ Breast Cancer 2:
Nichols, Hazel B; Bowles, Erin J A; Islam, Jessica et al. (2016) Tamoxifen Initiation After Ductal Carcinoma In Situ. Oncologist 21:134-40
He, Zhijian; Wan, Xiaomeng; Schulz, Anita et al. (2016) A high capacity polymeric micelle of paclitaxel: Implication of high dose drug therapy to safety and in vivo anti-cancer activity. Biomaterials 101:296-309
Johnson, Amy R; Qin, Yuanyuan; Cozzo, Alyssa J et al. (2016) Metabolic reprogramming through fatty acid transport protein 1 (FATP1) regulates macrophage inflammatory potential and adipose inflammation. Mol Metab 5:506-26
Roberts, Megan C; Weinberger, Morris; Dusetzina, Stacie B et al. (2016) Racial Variation in the Uptake of Oncotype DX Testing for Early-Stage Breast Cancer. J Clin Oncol 34:130-8
Hertz, Daniel L; Deal, Allison; Ibrahim, Joseph G et al. (2016) Tamoxifen Dose Escalation in Patients With Diminished CYP2D6 Activity Normalizes Endoxifen Concentrations Without Increasing Toxicity. Oncologist 21:795-803

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