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Breast Cancer Research: BCR

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https://www.readbyqxmd.com/read/29145865/the-endonuclease-eepd1-mediates-synthetic-lethality-in-rad52-depleted-brca1-mutant-breast-cancer-cells
#1
Robert Hromas, Hyun-Suk Kim, Gurjit Sidhu, Elizabeth Williamson, Aruna Jaiswal, Taylor A Totterdale, Jocelyn Nole, Suk-Hee Lee, Jac A Nickoloff, Kimi Y Kong
BACKGROUND: Proper repair and restart of stressed replication forks requires intact homologous recombination (HR). HR at stressed replication forks can be initiated by the 5' endonuclease EEPD1, which cleaves the stalled replication fork. Inherited or acquired defects in HR, such as mutations in breast cancer susceptibility protein-1 (BRCA1) or BRCA2, predispose to cancer, including breast and ovarian cancers. In order for these HR-deficient tumor cells to proliferate, they become addicted to a bypass replication fork repair pathway mediated by radiation repair protein 52 (RAD52)...
November 16, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29141657/local-estrogen-axis-in-the-human-bone-microenvironment-regulates-estrogen%C3%A2-receptor-positive%C3%A2-breast-cancer-cells
#2
Derek F Amanatullah, John S Tamaresis, Pauline Chu, Michael H Bachmann, Nhat M Hoang, Deborah Collyar, Aaron T Mayer, Robert B West, William J Maloney, Christopher H Contag, Bonnie L King
BACKGROUND: Approximately 70% of all breast cancers express the estrogen receptor, and are regulated by estrogen. While the ovaries are the primary source of estrogen in premenopausal women, most breast cancer is diagnosed following menopause, when systemic levels of this hormone decline. Estrogen production from androgen precursors is catalyzed by the aromatase enzyme. Although aromatase expression and local estrogen production in breast adipose tissue have been implicated in the development of primary breast cancer, the source of estrogen involved in the regulation of estrogen receptor-positive (ER+) metastatic breast cancer progression is less clear...
November 15, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29137653/prognostic-value-of-pam50-and-risk-of-recurrence-score-in-patients-with-early-stage-breast-cancer-with-long-term-follow-up
#3
Hege O Ohnstad, Elin Borgen, Ragnhild S Falk, Tonje G Lien, Marit Aaserud, My Anh T Sveli, Jon A Kyte, Vessela N Kristensen, Gry A Geitvik, Ellen Schlichting, Erik A Wist, Therese Sørlie, Hege G Russnes, Bjørn Naume
BACKGROUND: The aim of this study was to investigate the prognostic value of the PAM50 intrinsic subtypes and risk of recurrence (ROR) score in patients with early breast cancer and long-term follow-up. A special focus was placed on hormone receptor-positive/human epidermal growth factor receptor 2-negative (HR+/HER2-) pN0 patients not treated with chemotherapy. METHODS: Patients with early breast cancer (n = 653) enrolled in the observational Oslo1 study (1995-1998) were followed for distant recurrence and breast cancer death...
November 14, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29116004/reproductive-profiles-and-risk-of-breast-cancer-subtypes-a-multi-center-case-only-study
#4
Olivier Brouckaert, Anja Rudolph, Annouschka Laenen, Renske Keeman, Manjeet K Bolla, Qin Wang, Adelheid Soubry, Hans Wildiers, Irene L Andrulis, Volker Arndt, Matthias W Beckmann, Javier Benitez, Carl Blomqvist, Stig E Bojesen, Hiltrud Brauch, Paul Brennan, Hermann Brenner, Georgia Chenevix-Trench, Ji-Yeob Choi, Sten Cornelissen, Fergus J Couch, Angela Cox, Simon S Cross, Kamila Czene, Mikael Eriksson, Peter A Fasching, Jonine Figueroa, Henrik Flyger, Graham G Giles, Anna González-Neira, Pascal Guénel, Per Hall, Antoinette Hollestelle, John L Hopper, Hidemi Ito, Michael Jones, Daehee Kang, Julia A Knight, Veli-Matti Kosma, Jingmei Li, Annika Lindblom, Jenna Lilyquist, Artitaya Lophatananon, Arto Mannermaa, Siranoush Manoukian, Sara Margolin, Keitaro Matsuo, Kenneth Muir, Heli Nevanlinna, Paolo Peterlongo, Katri Pylkäs, Suleeporn Saajrang, Caroline Seynaeve, Chen-Yang Shen, Xiao-Ou Shu, Melissa C Southey, Anthony Swerdlow, Soo-Hwang Teo, Rob A E M Tollenaar, Thérèse Truong, Chiu-Chen Tseng, Alexandra J van den Broek, Carolien H M van Deurzen, Robert Winqvist, Anna H Wu, Cheng Har Yip, Jyh-Cherng Yu, Wei Zheng, Roger L Milne, Paul D P Pharoah, Douglas F Easton, Marjanka K Schmidt, Montserrat Garcia-Closas, Jenny Chang-Claude, Diether Lambrechts, Patrick Neven
BACKGROUND: Previous studies have shown that reproductive factors are differentially associated with breast cancer (BC) risk by subtypes. The aim of this study was to investigate associations between reproductive factors and BC subtypes, and whether these vary by age at diagnosis. METHODS: We used pooled data on tumor markers (estrogen and progesterone receptor, human epidermal growth factor receptor-2 (HER2)) and reproductive risk factors (parity, age at first full-time pregnancy (FFTP) and age at menarche) from 28,095 patients with invasive BC from 34 studies participating in the Breast Cancer Association Consortium (BCAC)...
November 7, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29065920/addition-of-t2-guided-optical-tomography-improves-noncontrast-breast-magnetic-resonance-imaging-diagnosis
#5
Jinchao Feng, Junqing Xu, Shudong Jiang, Hong Yin, Yan Zhao, Jiang Gui, Ke Wang, Xiuhua Lv, Fang Ren, Brian W Pogue, Keith D Paulsen
BACKGROUND: While dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) is recognized as the most sensitive examination for breast cancer detection, it has a substantial false positive rate and gadolinium (Gd) contrast agents are not universally well tolerated. As a result, alternatives to diagnosing breast cancer based on endogenous contrast are of growing interest. In this study, endogenous near-infrared spectral tomography (NIRST) guided by T2 MRI was evaluated to explore whether the combined imaging modality, which does not require contrast injection or involve ionizing radiation, can achieve acceptable diagnostic performance...
October 24, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29047390/roles-of-bccip-deficiency-in-mammary-tumorigenesis
#6
Roberto Droz-Rosario, Huimei Lu, Jingmei Liu, Ning-Ang Liu, Shridar Ganesan, Bing Xia, Bruce G Haffty, Zhiyuan Shen
BACKGROUND: Dysregulated DNA repair and cell proliferation controls are essential driving forces in mammary tumorigenesis. BCCIP was originally identified as a BRCA2 and CDKN1A interacting protein that has been implicated in maintenance of genomic stability, cell cycle regulation, and microtubule dynamics. The aims of this study were to determine whether BCCIP deficiency contributes to mammary tumorigenesis, especially for a subset of breast cancers with 53BP1 abnormality, and to reveal the mechanistic implications of BCCIP in breast cancer interventions...
October 18, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29047382/a-novel-and-fully-automated-mammographic-texture-analysis-for-risk-prediction-results-from-two-case-control-studies
#7
Chao Wang, Adam R Brentnall, Jack Cuzick, Elaine F Harkness, D Gareth Evans, Susan Astley
BACKGROUND: The percentage of mammographic dense tissue (PD) is an important risk factor for breast cancer, and there is some evidence that texture features may further improve predictive ability. However, relatively little work has assessed or validated textural feature algorithms using raw full field digital mammograms (FFDM). METHOD: A case-control study nested within a screening cohort (age 46-73 years) from Manchester UK was used to develop a texture feature risk score (264 cases diagnosed at the same time as mammogram of the contralateral breast, 787 controls) using the least absolute shrinkage and selection operator (LASSO) method for 112 features, and validated in a second case-control study from the same cohort but with cases diagnosed after the index mammogram (317 cases, 931 controls)...
October 18, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29029636/gene-expression-modules-in-primary-breast-cancers-as-risk-factors-for-organotropic-patterns-of-first-metastatic-spread-a-case-control-study
#8
Katherine Lawler, Efterpi Papouli, Cristina Naceur-Lombardelli, Anca Mera, Kayleigh Ougham, Andrew Tutt, Siker Kimbung, Ingrid Hedenfalk, Jun Zhan, Hongquan Zhang, Richard Buus, Mitch Dowsett, Tony Ng, Sarah E Pinder, Peter Parker, Lars Holmberg, Cheryl E Gillett, Anita Grigoriadis, Arnie Purushotham
BACKGROUND: Metastases from primary breast cancers can involve single or multiple organs at metastatic disease diagnosis. Molecular risk factors for particular patterns of metastastic spread in a clinical population are limited. METHODS: A case-control design including 1357 primary breast cancers was used to study three distinct clinical patterns of metastasis, which occur within the first six months of metastatic disease: bone and visceral metasynchronous spread, bone-only, and visceral-only metastasis...
October 13, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/29020998/proteomic-profiling-of-breast-cancer-metabolism-identifies-shmt2-and-asct2-as-prognostic-factors
#9
Stephan Bernhardt, Michaela Bayerlová, Martina Vetter, Astrid Wachter, Devina Mitra, Volker Hanf, Tilmann Lantzsch, Christoph Uleer, Susanne Peschel, Jutta John, Jörg Buchmann, Edith Weigert, Karl-Friedrich Bürrig, Christoph Thomssen, Ulrike Korf, Tim Beissbarth, Stefan Wiemann, Eva Johanna Kantelhardt
BACKGROUND: Breast cancer tumors are known to be highly heterogeneous and differences in their metabolic phenotypes, especially at protein level, are less well-understood. Profiling of metabolism-related proteins harbors the potential to establish new patient stratification regimes and biomarkers promoting individualized therapy. In our study, we aimed to examine the relationship between metabolism-associated protein expression profiles and clinicopathological characteristics in a large cohort of breast cancer patients...
October 11, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28982386/fut8-promotes-breast-cancer-cell-invasiveness-by-remodeling-tgf-%C3%AE-receptor-core-fucosylation
#10
Cheng-Fen Tu, Meng-Ying Wu, Yuh-Charn Lin, Reiji Kannagi, Ruey-Bing Yang
BACKGROUND: Core fucosylation (addition of fucose in α-1,6-linkage to core N-acetylglucosamine of N-glycans) catalyzed by fucosyltransferase 8 (FUT8) is critical for signaling receptors involved in many physiological and pathological processes such as cell growth, adhesion, and tumor metastasis. Transforming growth factor-β (TGF-β)-induced epithelial-mesenchymal transition (EMT) regulates the invasion and metastasis of breast tumors. However, whether receptor core fucosylation affects TGF-β signaling during breast cancer progression remains largely unknown...
October 5, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28974266/endophilin-a2-promotes-her2-internalization-and-sensitivity-to-trastuzumab-based-therapy-in-her2-positive-breast-cancers
#11
Tomas Baldassarre, Peter Truesdell, Andrew W Craig
BACKGROUND: Human epidermal growth factor receptor-2 (HER2) is amplified and a clinical target in a subset of human breast cancers with high rates of metastasis. Targeted therapies involving the antibody trastuzumab and trastuzumab-emtansine (T-DM1) have greatly improved outcomes for HER2-positive (HER2+) breast cancer patients. However, resistance to these targeted therapies can develop and limit their efficacy. Here, we test the involvement of the endocytic adaptor protein endophilin A2 (Endo II) in HER2+ breast cancer models, and their responses to treatments with trastuzumab and T-DM1...
October 3, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28946899/erratum-to-effect-of-neoadjuvant-chemotherapy-on-tumor-infiltrating-lymphocytes-and-pd-l1-expression-in-breast-cancer-and-its-clinical-significance
#12
Vasiliki Pelekanou, Daniel E Carvajal-Hausdorf, Mehmet Altan, Brad Wasserman, Cristobal Carvajal-Hausdorf, Hallie Wimberly, Jason Brown, Donald Lannin, Lajos Pusztai, David L Rimm
No abstract text is available yet for this article.
September 25, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28899409/alcohol-consumption-and-breast-tumor-gene-expression
#13
Jun Wang, Yujing J Heng, A Heather Eliassen, Rulla M Tamimi, Aditi Hazra, Vincent J Carey, Christine B Ambrosone, Victor P de Andrade, Adam Brufsky, Fergus J Couch, Tari A King, Francesmary Modugno, Celine M Vachon, David J Hunter, Andrew H Beck, Susan E Hankinson
BACKGROUND: Alcohol consumption is an established risk factor for breast cancer and the association generally appears stronger among estrogen receptor (ER)-positive tumors. However, the biological mechanisms underlying this association are not completely understood. METHODS: We analyzed messenger RNA (mRNA) microarray data from both invasive breast tumors (N = 602) and tumor-adjacent normal tissues (N = 508) from participants diagnosed with breast cancer in the Nurses' Health Study (NHS) and NHSII...
September 12, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28893315/heterogeneous-drug-penetrance-of-veliparib-and-carboplatin-measured-in-triple-negative-breast-tumors
#14
Imke H Bartelink, Brendan Prideaux, Gregor Krings, Lisa Wilmes, Pei Rong Evelyn Lee, Pan Bo, Byron Hann, Jean-Philippe Coppé, Diane Heditsian, Lamorna Swigart-Brown, Ella F Jones, Sergey Magnitsky, Ron J Keizer, Niels de Vries, Hilde Rosing, Nela Pawlowska, Scott Thomas, Mallika Dhawan, Rahul Aggarwal, Pamela N Munster, Laura J Esserman, Weiming Ruan, Alan H B Wu, Douglas Yee, Véronique Dartois, Radojka M Savic, Denise M Wolf, Laura van 't Veer
BACKGROUND: Poly(ADP-ribose) polymerase inhibitors (PARPi), coupled to a DNA damaging agent is a promising approach to treating triple negative breast cancer (TNBC). However, not all patients respond; we hypothesize that non-response in some patients may be due to insufficient drug penetration. As a first step to testing this hypothesis, we quantified and visualized veliparib and carboplatin penetration in mouse xenograft TNBCs and patient blood samples. METHODS: MDA-MB-231, HCC70 or MDA-MB-436 human TNBC cells were implanted in 41 beige SCID mice...
September 11, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28893303/contrast-enhanced-spectral-mammography-in-neoadjuvant-chemotherapy-monitoring-a-comparison-with-breast-magnetic-resonance-imaging
#15
Valentina Iotti, Sara Ravaioli, Rita Vacondio, Chiara Coriani, Sabrina Caffarri, Roberto Sghedoni, Andrea Nitrosi, Moira Ragazzi, Elisa Gasparini, Cristina Masini, Giancarlo Bisagni, Giuseppe Falco, Guglielmo Ferrari, Luca Braglia, Alberto Del Prato, Ivana Malavolti, Vladimiro Ginocchi, Pierpaolo Pattacini
BACKGROUND: Neoadjuvant-chemotherapy (NAC) is considered the standard treatment for locally advanced breast carcinomas. Accurate assessment of disease response is fundamental to increase the chances of successful breast-conserving surgery and to avoid local recurrence. The purpose of this study was to compare contrast-enhanced spectral mammography (CESM) and contrast-enhanced-MRI (MRI) in the evaluation of tumor response to NAC. METHODS: This prospective study was approved by the institutional review board and written informed consent was obtained...
September 11, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28886748/erbb3-drives-mammary-epithelial-survival-and-differentiation-during-pregnancy-and-lactation
#16
Michelle M Williams, David B Vaught, Meghan Morrison Joly, Donna J Hicks, Violeta Sanchez, Philip Owens, Bushra Rahman, David L Elion, Justin M Balko, Rebecca S Cook
BACKGROUND: During pregnancy, as the mammary gland prepares for synthesis and delivery of milk to newborns, a luminal mammary epithelial cell (MEC) subpopulation proliferates rapidly in response to systemic hormonal cues that activate STAT5A. While the receptor tyrosine kinase ErbB4 is required for STAT5A activation in MECs during pregnancy, it is unclear how ErbB3, a heterodimeric partner of ErbB4 and activator of phosphatidyl inositol-3 kinase (PI3K) signaling, contributes to lactogenic expansion of the mammary gland...
September 8, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28877752/spen-a-new-player-in-primary-cilia-formation-and-cell-migration-in-breast-cancer
#17
Stéphanie Légaré, Catherine Chabot, Mark Basik
BACKGROUND: The primary cilium is a microtubule-based and nonmotile organelle functioning as a cellular antenna that is involved in the regulation of cell proliferation, differentiation, and migration. In breast cancer cells, the primary cilium is a structure that decreases in incidence with increasing degrees of transformation and may be biologically more important in estrogen receptor (ERα)-negative breast cancer cells. Split ends (SPEN) is an ERα corepressor that we have identified as a tumor suppressor protein in ERα-positive breast cancer cells whose hormone-independent roles in breast cancer have never been explored...
September 6, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28877713/breast-tissue-organisation-and-its-association-with-breast-cancer-risk
#18
Maya Alsheh Ali, Kamila Czene, Louise Eriksson, Per Hall, Keith Humphreys
BACKGROUND: Mammographic percentage density is an established and important risk factor for breast cancer. In this paper, we investigate the role of the spatial organisation of (dense vs. fatty) regions of the breast defined from mammographic images in terms of breast cancer risk. METHODS: We present a novel approach that provides a thorough description of the spatial organisation of different types of tissue in the breast. Each mammogram is first segmented into four regions (fatty, semi-fatty, semi-dense and dense tissue)...
September 6, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28865492/pathobiology-of-the-129-stat1-mouse-model-of-human-age-related-er-positive-breast-cancer-with-an-immune-infiltrate-excluded-phenotype
#19
Hidetoshi Mori, Jane Q Chen, Robert D Cardiff, Zsófia Pénzváltó, Neil E Hubbard, Louis Schuetter, Russell C Hovey, Josephine F Trott, Alexander D Borowsky
BACKGROUND: Stat1 gene-targeted knockout mice (129S6/SvEvTac-Stat1 (tm1Rds)) develop estrogen receptor-positive (ER(+)), luminal-type mammary carcinomas at an advanced age. There is evidence for both host environment as well as tumor cell-intrinsic mechanisms to initiate tumorigenesis in this model. In this report, we summarize details of the systemic and mammary pathology at preneoplastic and tumor-bearing time points. In addition, we investigate tumor progression in the 129:Stat1 (-/-) host compared with wild-type 129/SvEv, and we describe the immune cell reaction to the tumors...
September 2, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28851415/association-of-pre-chemotherapy-peripheral-blood-pro-inflammatory-and-coagulation-factors-with-reduced-relative-dose-intensity-in-women-with-breast-cancer
#20
Yuan Yuan, Nilesh Vora, Can-Lan Sun, Daneng Li, Enrique Soto-Perez-de-Celis, Joanne Mortimer, The-Hang Luu, George Somlo, James Waisman, David Smith, Joseph Chao, Vani Katheria, Timothy Synold, Vivi Tran, Shu Mi, Abrahm Levi, Anait Arsenyan, Jennifer Choi, Laura Zavala, Susan Yost, Arti Hurria
BACKGROUND: Chemotherapy decreases the risk of relapse and mortality in early-stage breast cancer (BC), but it comes with the risk of toxicity. Chemotherapy efficacy depends on relative dose intensity (RDI), and an RDI < 85% is associated with worse overall survival. The pro-inflammatory (interleukin (IL)-6, C-reactive protein (CRP)) and coagulation factors (D-dimer) serve as biomarkers of aging. The purpose of this study is to determine if these biomarkers are associated with reduced RDI in women with stage I-III BC...
August 29, 2017: Breast Cancer Research: BCR
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