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Heterogeneity breast metastasis

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https://www.readbyqxmd.com/read/28336365/breast-cancer-cells-focus-on-the-consequences-of-epithelial-to-mesenchymal-transition
#1
Alice H L Bong, Gregory R Monteith
Breast cancers are highly heterogeneous and successful treatment of those subtypes with a high frequency of metastases and resistance to clinically available therapies remains a challenge. An understanding of mechanisms which may contribute to this heterogeneity and generation of more resilient cancer cells is therefore essential. Epithelial-to-mesenchymal transition (EMT) is a dynamic two-way process that occurs during embryonic development and wound healing whereby epithelial cells can gain plasticity and switch to a mesenchymal-like phenotype...
March 20, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28327601/bcip-a-gene-centered-platform-for-identifying-potential-regulatory-genes-in-breast-cancer
#2
Jiaqi Wu, Shuofeng Hu, Yaowen Chen, Zongcheng Li, Jian Zhang, Hanyu Yuan, Qiang Shi, Ningsheng Shao, Xiaomin Ying
Breast cancer is a disease with high heterogeneity. Many issues on tumorigenesis and progression are still elusive. It is critical to identify genes that play important roles in the progression of tumors, especially for tumors with poor prognosis such as basal-like breast cancer and tumors in very young women. To facilitate the identification of potential regulatory or driver genes, we present the Breast Cancer Integrative Platform (BCIP, http://omics.bmi.ac.cn/bcancer/). BCIP maintains multi-omics data selected with strict quality control and processed with uniform normalization methods, including gene expression profiles from 9,005 tumor and 376 normal tissue samples, copy number variation information from 3,035 tumor samples, microRNA-target interactions, co-expressed genes, KEGG pathways, and mammary tissue-specific gene functional networks...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28300837/a-cd44v-subpopulation-of-breast-cancer-stem-like-cells-with-enhanced-lung-metastasis-capacity
#3
Jing Hu, Gang Li, Peiyuan Zhang, Xueqian Zhuang, Guohong Hu
Cancer stem-like cells (CSCs) are a subpopulation of cancer cells responsible for tumor growth, and recent evidence suggests that CSCs also contribute to cancer metastasis. However, the heterogeneity of CSCs in metastasis capacities is still unclear in breast cancer. Here we show that among the CD24(-)/CD44(+) breast CSCs, a subset expressing the variant isoform of CD44 (CD44v) displays significantly higher capacity of lung metastasis than that expressing the standard CD44 isoform CD44s. Increasing or reducing the CD44v/CD44s ratio of breast cancer cells by regulating the expression of epithelial splicing regulatory protein 1 (ESRP1) leads to promotion or suppression of lung metastasis without influencing cancer cell stemness...
March 16, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28294120/down-regulation-of-adam33-as-a-predictive-biomarker-of-aggressive-breast-cancer
#4
Graciele C M Manica, Caroline F Ribeiro, Marco A S de Oliveira, Isabela T Pereira, Andressa Chequin, Edneia A S Ramos, Liliane M B Klassen, Ana Paula M Sebastião, Larissa M Alvarenga, Silvio M Zanata, Lucia De Noronha, Iris Rabinovich, Fabricio F Costa, Emanuel M Souza, Giseli Klassen
Breast cancer is a heterogeneous disease with differences in its clinical, molecular and biological features. Traditionally, immunohistochemical markers together with clinicopathologic parameters are used to classify breast cancer and to predict disease outcome. Triple-negative breast cancer (TNBC) is a particular type of breast cancer that is defined by a lack of expression of hormonal receptors and the HER2 gene. Most cases of TNBC also have a basal-like phenotype (BLBC) with expression of cytokeratin 5/6 and/or EGFR...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28280388/alternative-therapies-for-metastatic-breast-cancer-multimodal-approach-targeting-tumor-cell-heterogeneity
#5
REVIEW
Manpreet Sambi, Sabah Haq, Vanessa Samuel, Bessi Qorri, Fiona Haxho, Kelli Hill, William Harless, Myron R Szewczuk
One of the primary challenges in developing effective therapies for malignant tumors is the specific targeting of a heterogeneous cancer cell population within the tumor. The cancerous tumor is made up of a variety of distinct cells with specialized receptors and proteins that could potentially be viable targets for drugs. In addition, the diverse signals from the local microenvironment may also contribute to the induction of tumor growth and metastasis. Collectively, these factors must be strategically studied and targeted in order to develop an effective treatment protocol...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28271309/mutational-studies-on-single-circulating-tumor-cells-isolated-from-the-blood-of-inflammatory-breast-cancer-patients
#6
Catherine Bingham, Sandra V Fernandez, Patricia Fittipaldi, Paul W Dempsey, Karen J Ruth, Massimo Cristofanilli, R Katherine Alpaugh
PURPOSE: The molecular characterization of circulating tumor cells (CTCs) is critical to identify the key drivers of cancer metastasis and devising therapeutic approaches, particularly for inflammatory breast cancer (IBC) which is usually diagnosed at advance stages and progresses rapidly. METHODS: Genomic alterations in tumor tissue samples were studied using Foundation One™. Single CTCs were isolated using CellSearch followed by single-cell isolation by DEPArray™...
March 7, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28250928/location-of-tumor-affects-local-and-distant-immune-cell-type-and-number
#7
Jonathan A Hensel, Vinayak Khattar, Reading Ashton, Carnellia Lee, Gene P Siegal, Selvarangan Ponnazhagan
INTRODUCTION: Tumors comprise heterogeneous populations of cells, including immune infiltrates that polarize during growth and metastasis. Our preclinical studies on breast cancer (BCa) identified functional differences in myeloid-derived suppressor cells based on tumor microenvironment (TME), prompting variations in host immune response to tumor growth, and dissemination based on tissue type. METHODS: In order to understand if such variations existed among other immune cells, and if such alteration occurs in response to tumor growth at the primary site or due to bone dissemination, we characterized immune cells, examining localized growth and in the tibia...
March 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28248929/rnai-screens-for-rho-gtpase-regulators-of-cell-shape-and-yap-taz-localisation-in-triple-negative-breast-cancer
#8
Patricia Pascual-Vargas, Samuel Cooper, Julia Sero, Vicky Bousgouni, Mar Arias-Garcia, Chris Bakal
In order to metastasise, triple negative breast cancer (TNBC) must make dynamic changes in cell shape. The shape of all eukaryotic cells is regulated by Rho Guanine Nucleotide Exchange Factors (RhoGEFs), which activate Rho-family GTPases in response to mechanical and informational cues. In contrast, Rho GTPase-activating proteins (RhoGAPs) inhibit Rho GTPases. However, which RhoGEFs and RhoGAPS couple TNBC cell shape to changes in their environment is very poorly understood. Moreover, whether the activity of particular RhoGEFs and RhoGAPs become dysregulated as cells evolve the ability to metastasise is not clear...
March 1, 2017: Scientific Data
https://www.readbyqxmd.com/read/28230773/programmed-death-ligand-1-pd-l1-tumor-expression-is-associated-with-a-better-prognosis-and-diabetic-disease-in-triple-negative-breast-cancer-patients
#9
Gerardo Botti, Francesca Collina, Giosuè Scognamiglio, Federica Rao, Valentina Peluso, Rossella De Cecio, Michela Piezzo, Gabriella Landi, Michelino De Laurentiis, Monica Cantile, Maurizio Di Bonito
Triple Negative Breast Cancers (TNBC) subtype is an aggressive disease with poor clinical outcome. The only treatment available is surgery followed by chemotherapy or radiotherapy. Programmed death-ligand 1 (PD-L1) is a trans-membrane protein expressed on a wide variety of cells including immune cells, epithelial and vascular endothelial cells. Recently, PD-1/PD-L1 pathway signaling was described as an adaptive immune resistance mechanism enacted by the tumor cells to evade the immune response. Its presence on tumor cell membranes, acquired for this reason, through time, is an important prognostic value...
February 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28195880/pd-l1-expression-and-intratumoral-heterogeneity-across-breast-cancer-subtypes-and-stages-an-assessment-of-245-primary-and-40-metastatic-tumors
#10
Erik A Dill, Alejandro A Gru, Kristen A Atkins, Lisa A Friedman, Margaret E Moore, Timothy N Bullock, Janet V Cross, Patrick M Dillon, Anne M Mills
Tumor expression of programmed cell death ligand 1 (PD-L1) is associated with immune evasion in a variety of malignancies, including a subset of triple-negative breast carcinomas, and may mark cancers as susceptible to PD-1/PD-L1 inhibitor therapies. We herein characterize PD-L1 expression in breast cancers across the full range of histomorphologies and investigate its intratumoral heterogeneity and fidelity across primaries and metastases. A total of 245 primary and 40 metastatic (20 nodal, 20 distant) breast carcinomas were evaluated with PD-L1 immunohistochemistry on tissue microarray...
March 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28191804/does-alternative-and-traditional-wasam-local-cautery-therapy-facilitate-an-early-and-more-extensive-locoregional-metastasis-of-breast-cancer
#11
(no author information available yet)
INTRODUCTION: A large heterogeneous group of unproven remedies exist to treat cancer in both developed and developing countries. Some of these remedies often do more harm than good to the patients. The traditional medicine is the sum total of the knowledge, skills, and practices based on the theories, beliefs, and experiences indigenous to different cultures. The traditional medicine in Oman is based on herbal treatment and skin treatment (massage, Cupping and skin burn "cautery" treatment-known as Wasam or Kaiy)...
September 2016: Gulf Journal of Oncology
https://www.readbyqxmd.com/read/28185146/mr-imaging-features-associated-with-distant-metastasis-free-survival-of-patients-with-invasive-breast-cancer-a-case-control-study
#12
Sung Eun Song, Sung Ui Shin, Hyeong-Gon Moon, Han Suk Ryu, Kwangsoo Kim, Woo Kyung Moon
PURPOSE: Preoperative breast magnetic resonance (MR) imaging features of primary breast cancers may have the potential to act as prognostic biomarkers by providing morphologic and kinetic features representing inter- or intra-tumor heterogeneity. Recent radiogenomic studies reveal that several radiologist-annotated image features are associated with genes or signal pathways involved in tumor progression, treatment resistance, and distant metastasis (DM). We investigate whether preoperative breast MR imaging features are associated with worse DM-free survival in patients with invasive breast cancer...
February 9, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28176853/quantifying-tumor-associated-macrophages-in-breast-cancer-a-comparison-of-iron-and-fluorine-based-mri-cell-tracking
#13
Ashley V Makela, Jeffrey M Gaudet, Paula J Foster
Tumor associated macrophages (TAMs) are associated with tumor growth and metastasis. MRI can detect TAMs labeled with iron oxide (USPIO) or perfluorocarbon (PFC) agents. This study compared these two cell tracking approaches for imaging TAMs in vivo. 4T1 tumors were imaged with MRI at 4 days or 3 weeks post cell implantation after intravenous (i.v.) administration of either USPIO or PFC. Signal loss was detected within tumors at both time points post USPIO. Images acquired at 4 days demonstrated signal loss encompassing the entire tumor and around the periphery at 3 weeks...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28143999/3d-hydrogel-based-microwell-arrays-as-a-tumor-microenvironment-model-to-study-breast-cancer-growth
#14
John Casey, Xiaoshan Yue, Trung Dung Nguyen, Aylin Acun, Victoria R Zellmer, Siyuan Zhang, Pinar Zorlutuna
The tumor microenvironment (TME) is distinctly heterogeneous and is involved in tumor growth, metastasis, and drug resistance. Mimicking this diverse microenvironment is essential for understanding tumor growth and metastasis. Despite the substantial scientific progress made with traditional cell culture methods, microfabricated three-dimensional (3D) cell cultures that can be precisely controlled to mimic the changes occur in the TME over tumor progression are necessary for simulating organ-specific TME in vitro...
March 15, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28124185/mouse-models-of-breast-cancer-share-amplification-and-deletion-events-with-human-breast-cancer
#15
Jonathan Rennhack, Briana To, Harrison Wermuth, Eran R Andrechek
Breast tumor heterogeneity has been well documented through the use of multiplatform -omic studies in human tumors. However, there is no integrative database to capture the heterogeneity within mouse models of breast cancer. This project identifies genomic copy number alterations (CNAs) in 600 tumors across 27 major mouse models of breast cancer through the application of a predictive algorithm to publicly available gene expression data. It was found that despite the presence of strong oncogenic drivers in most mouse models, CNAs are extremely common but heterogeneous both between models and within models...
March 2017: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/28104391/na-h-exchanger-mediated-hydrogen-ion-extrusion-as-a-carcinogenic-signal-in-triple-negative-breast-cancer-etiopathogenesis-and-prospects-for-its-inhibition-in-therapeutics
#16
REVIEW
Schammim Ray Amith, Larry Fliegel
Breast cancer is the leading cause of cancer-related death in women in Europe and North America, and metastasis is the primary cause of fatality in patients with breast cancer. While some breast cancers are quite treatable, the triple-negative breast cancers are more metastatic and resistant to chemotherapy. There is clearly an urgent need for better treatments for this form of the disease. Breast cancer is characterized by genetically complex intra-tumour heterogeneity, particularly within the triple-negative clinical subtype...
January 16, 2017: Seminars in Cancer Biology
https://www.readbyqxmd.com/read/28089517/hypoxia-induces-a-hif-1-dependent-transition-from-collective-to-amoeboid-dissemination-in-epithelial-cancer-cells
#17
Steffi Lehmann, Veronika Te Boekhorst, Julia Odenthal, Roberta Bianchi, Sjoerd van Helvert, Kristian Ikenberg, Olga Ilina, Szymon Stoma, Jael Xandry, Liying Jiang, Reidar Grenman, Markus Rudin, Peter Friedl
Cancer metastases arise from a multi-step process that requires metastasizing tumor cells to adapt to signaling input from varying tissue environments [1]. As an early metastatic event, cancer cell dissemination occurs through different migration programs, including multicellular, collective, and single-cell mesenchymal or amoeboid migration [2-4]. Migration modes can interconvert based on changes in cell adhesion, cytoskeletal mechanotransduction [5], and/or proteolysis [6], most likely under the control of transcriptional programs such as the epithelial-to-mesenchymal transition (EMT) [7, 8]...
February 6, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28079291/prognostic-value-of-pd-l1-in-breast-cancer-a-meta-analysis
#18
Changjun Wang, Hanjiang Zhu, Yidong Zhou, Feng Mao, Yan Lin, Bo Pan, Xiaohui Zhang, Qianqian Xu, Xin Huang, Qiang Sun
Programmed cell death 1 ligand 1 (PD-L1) is a promising therapeutic target for cancer immunotherapy. However, the correlation between PD-L1 and breast cancer survival remains unclear. Here, we present the first meta-analysis to investigate the prognostic value of PD-L1 in breast cancer. We searched Pubmed, Embase, and Cochrane Central Register of Controlled Trials databases for relevant studies evaluating PD-L1 expression and breast cancer survival. Fixed- and random-effect meta-analyses were conducted based on heterogeneity of included studies...
January 12, 2017: Breast Journal
https://www.readbyqxmd.com/read/28051026/blood-oxygenation-level-dependent-magnetic-resonance-imaging-of-breast-cancer-correlation-with-carbonic-anhydrase-ix-and-vascular-endothelial-growth-factor
#19
Ying Wang, Min Liu, Mu-Lan Jin
BACKGROUND: Blood oxygenation level-dependent magnetic resonance imaging (BOLD-MRI) is a functional MRI technique which involves using the paramagnetic properties of deoxyhemoglobin to image the local tissue oxygen concentration. The purpose of this study was to investigate whether BOLD-MRI could evaluate hypoxia and angiogenesis of breast invasive ductal carcinoma (IDC). METHODS: Ninety-eight female patients with IDC were retrospectively included in this research...
2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28030809/genomic-regulation-of-invasion-by-stat3-in-triple-negative-breast-cancer
#20
Joy M McDaniel, Katherine E Varley, Jason Gertz, Daniel S Savic, Brian S Roberts, Sarah K Bailey, Lalita A Shevde, Ryne C Ramaker, Brittany N Lasseigne, Marie K Kirby, Kimberly M Newberry, E Christopher Partridge, Angela L Jones, Braden Boone, Shawn E Levy, Patsy G Oliver, Katherine C Sexton, William E Grizzle, Andres Forero, Donald J Buchsbaum, Sara J Cooper, Richard M Myers
Breast cancer is a heterogeneous disease comprised of four molecular subtypes defined by whether the tumor-originating cells are luminal or basal epithelial cells. Breast cancers arising from the luminal mammary duct often express estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth receptor 2 (HER2). Tumors expressing ER and/or PR are treated with anti-hormonal therapies, while tumors overexpressing HER2 are targeted with monoclonal antibodies. Immunohistochemical detection of ER, PR, and HER2 receptors/proteins is a critical step in breast cancer diagnosis and guided treatment...
January 31, 2017: Oncotarget
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