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https://www.readbyqxmd.com/read/28345661/stepwise-analysis-of-mir9-loci-identifies-mir-9-5p-to-be-involved-in-oestrogen-regulated-pathways-in-breast-cancer-patients
#1
Raffaela Barbano, Barbara Pasculli, Michelina Rendina, Andrea Fontana, Caterina Fusilli, Massimiliano Copetti, Stefano Castellana, Vanna Maria Valori, Maria Morritti, Paolo Graziano, Ciuffreda Luigi, Michelina Coco, Francesco Picardo, Tommaso Mazza, Ella Evron, Roberto Murgo, Evaristo Maiello, Manel Esteller, Vito Michele Fazio, Paola Parrella
miR-9 was initially identified as an epigenetically regulated miRNA in tumours, but inconsistent findings have been reported so far. We analysed the expression of miR-9-5p, miR-9-3p, pri-miRs and MIR9 promoters methylation status in 131 breast cancer cases and 12 normal breast tissues (NBTs). The expression of both mature miRs was increased in tumours as compared to NBTs (P < 0.001) and negatively correlated with ER protein expression (P = 0.005 and P = 0.003, for miR-9-3p and miR-9-5p respectively)...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345629/wt1-expression-in-breast-cancer-disrupts-the-epithelial-mesenchymal-balance-of-tumour-cells-and-correlates-with-the-metabolic-response-to-docetaxel
#2
Mara Artibani, Andrew H Sims, Joan Slight, Stuart Aitken, Anna Thornburn, Morwenna Muir, Valerie G Brunton, Jorge Del-Pozo, Linda R Morrison, Elad Katz, Nicholas D Hastie, Peter Hohenstein
WT1 is a transcription factor which regulates the epithelial-mesenchymal balance during embryonic development and, if mutated, can lead to the formation of Wilms' tumour, the most common paediatric kidney cancer. Its expression has also been reported in several adult tumour types, including breast cancer, and usually correlates with poor outcome. However, published data is inconsistent and the role of WT1 in this malignancy remains unclear. Here we provide a complete study of WT1 expression across different breast cancer subtypes as well as isoform specific expression analysis...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345619/impact-of-molecular-subtypes-on-metastatic-breast-cancer-patients-a-seer-population-based-study
#3
Yue Gong, Yi-Rong Liu, Peng Ji, Xin Hu, Zhi-Ming Shao
To investigate the significance and impact of molecular subtyping stratification on metastatic breast cancer patients, we identified 159,344 female breast cancer patients in the Surveillance, Epidemiology and End Results (SEER) database with known hormone receptor (HoR) and human epidermal growth factor receptor 2 (HER2) status. 4.8% of patients were identified as having stage IV disease, and were more likely to be HER2+/HoR-, HER2+/HoR+, or HER2-/HoR-. Stage IV breast cancer patients with a HER2+/HoR+ status exhibited the highest median overall survival (OS) (44...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28344890/suppression-of-indoleamine-2-3-dioxygenase-1-expression-by-promoter-hypermethylation-in-er-positive-breast-cancer
#4
Dyah L Dewi, Soumya R Mohapatra, Saioa Blanco Cabañes, Isabell Adam, Luis F Somarribas Patterson, Bianca Berdel, Masroor Kahloon, Loreen Thürmann, Stefanie Loth, Katharina Heilmann, Dieter Weichenhan, Oliver Mücke, Ines Heiland, Pauline Wimberger, Jan Dominik Kuhlmann, Karl-Heinz Kellner, Sarah Schott, Christoph Plass, Michael Platten, Clarissa Gerhäuser, Saskia Trump, Christiane A Opitz
Kynurenine formation by tryptophan-catabolic indoleamine-2,3-dioxygenase 1 (IDO1) plays a key role in tumor immune evasion and inhibition of IDO1 is efficacious in preclinical models of breast cancer. As the response of breast cancer to immune checkpoint inhibitors may be limited, a better understanding of the expression of additional targetable immunomodulatory pathways is of importance. We therefore investigated the regulation of IDO1 expression in different breast cancer subtypes. We identified estrogen receptor α (ER) as a negative regulator of IDO1 expression...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28342866/the-t47d-cell-line-is-an-ideal-experimental-model-to-elucidate-the-progesterone-specific-effects-of-a-luminal-a-subtype-of-breast-cancer
#5
Sungryul Yu, Taemook Kim, Kyung Hyun Yoo, Keunsoo Kang
Cell lines are often used as in vitro tools to mimic certain types of in vivo system; several cell lines, including MCF-7 and T47D, have been widely used in breast cancer studies without investigating the cell lines' characteristics. In this study, we compared the genome-wide binding profiles of ERα, PR, and P300, and the gene expression changes between MCF-7 and T47D cell lines that represent the luminal A subtype of breast cancer. Surprisingly, several thousand genes were differentially expressed under estrogenic condition...
March 22, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28341751/low-recombination-proficiency-score-rps-predicts-heightened-sensitivity-to-dna-damaging-chemotherapy-in-breast-cancer
#6
Sean Pitroda, Riyue Bao, Jorge Andrade, Ralph R Weichselbaum, Philip P Connell
PURPOSE: Molecular-based cancer tests have been developed to augment the standard clinical and pathologic features used to tailor treatments to individual breast cancer patients. Homologous recombination (HR) repairs double-stranded DNA breaks and promotes tolerance to lesions that disrupt DNA replication. Recombination Proficiency Score (RPS) quantifies HR efficiency based on the expression of four genes involved in DNA damage repair. We hypothesized low RPS values can identify HR-deficient breast cancers most sensitive to DNA-damaging chemotherapy...
March 24, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28341031/surveillance-of-women-with-a-personal-history-of-breast-cancer-by-tumour-subtype
#7
A P Benveniste, M J Dryden, I Bedrosian, P K Morrow, R L Bassett, W Yang
AIM: To determine if the rate and timing of a second breast cancer event (SBCE) in women with a personal history of breast cancer varies by disease subtype or breast imaging method. MATERIALS AND METHODS: A retrospective review was performed of women with a SBCE from January 2006 to December 2010 at a single institution. Data analysed included oestrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2) status of the primary and second breast cancers; mammographic and ultrasound (US) features from SBCE; and the time interval between both events...
March 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28337968/crispr-cas9-mutagenesis-invalidates-a-putative-cancer-dependency-targeted-in-on-going-clinical-trials
#8
Ann Lin, Christopher J Giuliano, Nicole M Sayles, Jason M Sheltzer
The Maternal Embryonic Leucine Zipper Kinase (MELK) has been reported to be a genetic dependency in several cancer types. MELK RNAi and small-molecule inhibitors of MELK block the proliferation of various cancer cell lines, and MELK knockdown has been described as particularly effective against the highly-aggressive basal/triple-negative subtype of breast cancer. Based on these preclinical results, the MELK inhibitor OTS167 is currently being tested as a novel chemotherapy agent in several clinical trials. Here, we report that mutagenizing MELK with CRISPR/Cas9 has no effect on the fitness of basal breast cancer cell lines or cell lines from six other cancer types...
March 24, 2017: ELife
https://www.readbyqxmd.com/read/28337281/c-myc-induced-upregulation-of-lncrna-snhg12-regulates-cell-proliferation-apoptosis-and-migration-in-triple-negative-breast-cancer
#9
Ouchen Wang, Fan Yang, Yehuan Liu, Lin Lv, Ruimin Ma, Chuanzhi Chen, Jiao Wang, Qiufan Tan, Yue Cheng, Erjie Xia, Yizuo Chen, Xiaohua Zhang
Triple-negative breast cancer (TNBC) is one of the most aggressive subtypes of breast cancer, with a significantly higher recurrence and mortality rate. There is an urgent need to uncover the mechanism underlying TNBC and establish therapeutic targets. Long non-coding RNAs (lncRNAs) are involved in a series of biological functions and provide novel insights into the molecular mechanism of cancer. Based on their expression specificity and large number, lncRNAs are likely to serve as the basis for clinical applications in oncology...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28336365/breast-cancer-cells-focus-on-the-consequences-of-epithelial-to-mesenchymal-transition
#10
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/28335884/prognostic-factors-and-survival-according-to-tumour-subtype-in-women-presenting-with-breast-cancer-brain-metastases-at-initial-diagnosis
#11
José Pablo Leone, Julieta Leone, Ariel Osvaldo Zwenger, Julián Iturbe, Bernardo Amadeo Leone, Carlos Teodoro Vallejo
BACKGROUND: The presence of brain metastases at the time of initial breast cancer diagnosis (BMIBCD) is uncommon. Hence, the prognostic assessment and management of these patients is very challenging. The aim of this study was to analyse the influence of tumour subtype compared with other prognostic factors in the survival of patients with BMIBCD. METHODS: We evaluated women with BMIBCD, reported to Surveillance, Epidemiology and End Results program from 2010 to 2013...
March 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28335647/sorafenib-for-the-treatment-of-breast-cancer
#12
Giuseppe Bronte, Daniele Andreis, Sara Bravaccini, Roberta Maltoni, Lorenzo Cecconetto, Alessio Schirone, Alberto Farolfi, Anna Fedeli, Patrizia Serra, Caterina Donati, Dino Amadori, Andrea Rocca
Breast cancer treatment includes many options depending on the tumor clinicopathological profile, which groups breast cancer into various subtypes. Bevacizumab is currently the only drug capable of targeting angiogenesis in breast cancer. Sorafenib has also been studied in combination with other agents. Areas covered: Pharmacological aspects of sorafenib, including results from preclinical studies on breast cancer cells; findings about clinical efficacy and safety in both single-arm and randomized clinical trials; ongoing trials...
March 24, 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28334900/cdk12-regulates-alternative-last-exon-mrna-splicing-and-promotes-breast-cancer-cell-invasion
#13
Jerry F Tien, Alborz Mazloomian, S-W Grace Cheng, Christopher S Hughes, Christalle C T Chow, Leanna T Canapi, Arusha Oloumi, Genny Trigo-Gonzalez, Ali Bashashati, James Xu, Vicky C-D Chang, Sohrab P Shah, Samuel Aparicio, Gregg B Morin
CDK12 (cyclin-dependent kinase 12) is a regulatory kinase with evolutionarily conserved roles in modulating transcription elongation. Recent tumor genome studies of breast and ovarian cancers highlighted recurrent CDK12 mutations, which have been shown to disrupt DNA repair in cell-based assays. In breast cancers, CDK12 is also frequently co-amplified with the HER2 (ERBB2) oncogene. The mechanisms underlying functions of CDK12 in general and in cancer remain poorly defined. Based on global analysis of mRNA transcripts in normal and breast cancer cell lines with and without CDK12 amplification, we demonstrate that CDK12 primarily regulates alternative last exon (ALE) splicing, a specialized subtype of alternative mRNA splicing, that is both gene- and cell type-specific...
March 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28334730/examining-the-common-aetiology-of-serous-ovarian-cancers-and-basal-like-breast-cancers-using-double-primaries
#14
Colin B Begg, Megan S Rice, Emily C Zabor, Shelley S Tworoger
BACKGROUND: The somatic molecular profiles of basal-like breast cancers and high-grade serous ovarian cancers share many similarities, leading to the hypothesis that they have similar aetiologies, in which case they should occur together in the same patient more often than expected. METHODS: We identified 545 women with double independent primary cancers of the breast and ovary reported to the California Cancer Registry from 1999 to 2013 and examined the coincidence of subtype combinations...
March 23, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28334705/are-there-breast-cancer-patients-with-node-negative-small-tumours-who-do-not-benefit-from-adjuvant-systemic-therapy
#15
Tanja Stüber, Igor Novopashenny, Joachim Diessner, Catharina Bartmann, Roland Stein, Mathias Krockenberger, Sebastian Häusler, Wolfgang Janni, Rolf Kreienberg, Maria Blettner, Achim Wöckel, Manfred Wischnewsky
OBJECTIVE: To identify subgroups of patients with pT1 pN0 breast cancer (BC) who might not profit from adjuvant systemic therapy (AST). METHODS: Data of 3,774 pT1 pN0 BC patients from 17 certified BC centres within the BRENDA study group were collected between 1992 and 2008 and retrospectively analysed. Uni- and multivariate analyses were performed using Kaplan-Meier methods and Cox regression models. RESULTS: 279 (7.4%) of the pT1 pN0 BC patients were T1a, 944 (25...
March 24, 2017: Oncology
https://www.readbyqxmd.com/read/28334112/human-mitochondrial-pyrroline-5-carboxylate-reductase-1-promotes-invasiveness-and-impacts-survival-in-breast-cancers
#16
Jiefeng Ding, Mei-Ling Kuo, Leila Su, Lijun Xue, Frank Luh, Hang Zhang, Jianghai Wang, Tiffany G Lin, Keqiang Zhang, Peiguo Chu, Shu Zheng, Xiyong Liu, Yun Yen
Human mitochondrial pyrroline-5-carboxylate reductase (PYCR) is a house keeping enzyme that catalyzes the reduction of ?1-pyrroline-5-carboxylate (P5C) to proline. This enzymatic cycle plays pivotal roles in amino acid metabolism, intracellular redox potential, and mitochondrial integrity. Here, we hypothesize that PYCR1 might be a novel prognostic biomarker and therapeutic target for breast cancer. In this study, breast cancer tissue samples were obtained from Zhejiang University (ZJU set). Immunohistochemistry analysis was performed to detect the protein level of PYCR1, and Kaplan-Meier and Cox proportional analyses were employed in this outcome study...
February 24, 2017: Carcinogenesis
https://www.readbyqxmd.com/read/28332699/mitotic-index-matter-how-to-improve-the-assessment-of-mitosis-in-order-to-better-classify-g2-breast-cancer-and-luminal-a-category
#17
Rachele Del Sordo, Guido Bellezza, Ivana Ferri, Anjuta Pireddu, Renato Colella, Angelo Sidoni
G2 ductal infiltrating carcinomas are a heterogeneous group of tumours with ambiguous clinical significance. This is because G2 carcinomas are almost always the largest category and poorly reproducible. Mitotic count (MC) is one of the causes of poor histological grading reproducibility. The phosphoistone H3 (PPH3) antibody improves identification of mitotic figures. The aim of our study is to demonstrate whether using a new histological grading system based on PPH3 immunostaining to assess MC can re-stratify G2 category...
March 23, 2017: Histology and Histopathology
https://www.readbyqxmd.com/read/28331765/background-parenchymal-enhancement-and-fibroglandular-tissue-proportion-on-breast-mri-correlation-with-hormone-receptor-expression-and-molecular-subtypes-of-breast-cancer
#18
Mesut Öztürk, Ahmet Veysel Polat, Yurdanur Süllü, Leman Tomak, Ayfer Kamalı Polat
OBJECTIVE: To assess the relationship between background parenchymal enhancement (BPE) and fibroglandular tissue (FGT) proportion on breast magnetic resonance imaging (MRI) and hormone receptor expression and molecular subtypes in invasive breast cancer. MATERIALS AND METHODS: This retrospective study enrolled 75 breast cancer patients who underwent breast MRI before treatment. T1-weighted images were reviewed to determine the FGT proportion, and contrast-enhanced fat-suppressed T1-weighted images were reviewed to determine BPE...
January 2017: J Breast Health (2013)
https://www.readbyqxmd.com/read/28331756/the-management-and-outcomes-of-male-breast-cancer
#19
Ömer Uslukaya, Metehan Gümüş, Hatice Gümüş, Zübeyir Bozdağ, Ahmet Türkoğlu
OBJECTIVE: Due to a lack of sufficient data, the treatment protocols for male breast cancer are usually the same as those used for female breast cancer. The aim of the current study was to present our clinical experience with male breast cancer. MATERIALS AND METHODS: The records of 37 patients who were treated for male breast cancer in our hospital between 2004 and 2014 were reviewed retrospectively. The data of patients were recorded and analyzed. RESULTS: The mean age of the patients was 63...
October 2016: J Breast Health (2013)
https://www.readbyqxmd.com/read/28331738/sentinel-node-biopsy-in-special-histologic-types-of-invasive-breast-cancer
#20
Montserrat Solà, Mireia Recaj, Eva Castellà, Pere Puig, Josep Maria Gubern, Juan Francisco Julian, Manel Fraile
OBJECTIVE: To assess the feasibility of sentinel node biopsy (SNB) in ductal and lobular invasive breast cancer, a group of tumors known as special histologic type (SHT) of breast cancer. MATERIALS AND METHODS: Between January 1997 and July 2008, 2253 patients from 6 affiliated hospitals underwent SNB who had early breast cancer and clinically negative axilla. The patients' data were collected in a multicenter database. For lymphatic mapping, all patients received an intralesional dose of radiocolloid Tc-99m (4mCi in 0...
April 2016: J Breast Health (2013)
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