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https://www.readbyqxmd.com/read/28087261/dna-aptamer-probes-for-detection-of-estrogen-receptor-%C3%AE-positive-carcinomas
#1
Arghya Sett, Bibhuti Bhusan Borthakur, Jagannath Dev Sharma, Amal Chandra Kataki, Utpal Bora
Estrogen receptor alpha (ERα) which is a ligand-activated transcription factor also known as NR3A1 (nuclear receptor subfamily 3, group A, member 1). It is an important biomarker for breast cancer metastasis. In the present study, we report a novel DNA aptamer candidate against estrogen receptor (ER) alpha structure. The enriched aptamer candidate was obtained after 14 iterative cycles of in vitro protein-SELEX process. Isothermal calorimetry study suggests the nanomolar sensitivity of the candidate ER_Apt1 to its target protein...
December 25, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28081544/nomogram-to-predict-pathologic-complete-response-in-her2-positive-breast-cancer-treated-with-neoadjuvant-systemic-therapy
#2
Takeo Fujii, Takahiro Kogawa, Jimin Wu, Aysegul A Sahin, Dian D Liu, Mariana Chavez-MacGregor, Sharon H Giordano, Akshara Raghavendra, Rushmy K Murthy, Debu Tripathy, Yu Shen, Jose-Miguel Yamal, Naoto T Ueno
BACKGROUND: Pathologic complete response (pCR) is associated with improved survival outcomes in patients with HER2-positive primary breast cancer. We developed a nomogram to predict the probability of pCR rates by using oestrogen receptor (ER) expression, progesterone receptor (PR) expression and HER2/CEP17 ratio as continuous variables. METHODS: We retrospectively reviewed patients with stages I-III HER2-positive invasive breast cancer who had definitive surgery in 1999-2015 and received neoadjuvant systemic therapy (NST)...
January 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28079291/prognostic-value-of-pd-l1-in-breast-cancer-a-meta-analysis
#3
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/28079144/igf-ir-cooperates-with-er%C3%AE-to-inhibit-breast-cancer-cell-aggressiveness-by-regulating-the-expression-and-localisation-of-ecm-molecules
#4
Nikolaos A Afratis, Panagiotis Bouris, Spyros S Skandalis, Hinke A Multhaupt, John R Couchman, Achilleas D Theocharis, Nikos K Karamanos
IGF-IR is highly associated with the behaviour of breast cancer cells. In ERα-positive breast cancer, IGF-IR is present at high levels. In clinical practice, prolonged treatment with anti-estrogen agents results in resistance to the therapy with activation of alternative signaling pathways. Receptor Tyrosine Kinases, and especially IGF-IR, have crucial roles in these processes. Here, we report a nodal role of IGF-IR in the regulation of ERα-positive breast cancer cell aggressiveness and the regulation of expression levels of several extracellular matrix molecules...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28079011/molecular-mechanisms-of-anticancer-effects-of-phytoestrogens-in-breast-cancer
#5
Chia-Jung Hsieh, Ya-Ling Hsu, Ya-Fang Huang, Eing-Mei Tsai
Phytoestrogens derived from plants exert estrogenic as well as antiestrogenic effects and multiple actions within breast cancer cells. Chemopreventive properties of phytoestrogens have emerged from epidemiological observations. In recent clinical research studies, phytoestrogens are safe and may even protect against breast cancer. In this brief review, the molecular mechanisms of phytoestrogens on regulation of cell cycle, apoptosis, estrogen receptors, cell signaling pathways, and epigenetic modulations in relation to breast cancer are discussed...
January 11, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28076434/diabetes-and-breast-cancer-subtypes
#6
Heleen K Bronsveld, Vibeke Jensen, Pernille Vahl, Marie L De Bruin, Sten Cornelissen, Joyce Sanders, Anssi Auvinen, Jari Haukka, Morten Andersen, Peter Vestergaard, Marjanka K Schmidt
BACKGROUND: Women with diabetes have a worse survival after breast cancer diagnosis compared to women without diabetes. This may be due to a different etiological profile, leading to the development of more aggressive breast cancer subtypes. Our aim was to investigate whether insulin and non-insulin treated women with diabetes develop specific clinicopathological breast cancer subtypes compared to women without diabetes. METHODS AND FINDINGS: This cross-sectional study included randomly selected patients with invasive breast cancer diagnosed in 2000-2010...
2017: PloS One
https://www.readbyqxmd.com/read/28076334/establishment-of-a-normal-derived-estrogen-receptor-positive-cell-line-comparable-to-the-prevailing-human-breast-cancer-subtype
#7
Branden M Hopkinson, Marie C Klitgaard, Ole William Petersen, René Villadsen, Lone Rønnov-Jessen, Jiyoung Kim
Understanding human cancer increasingly relies on insight gained from subtype specific comparisons between malignant and non-malignant cells. The most frequent subtype in breast cancer is the luminal. By far the most frequently used model for luminal breast cancer is the iconic estrogen receptor-positive (ERpos) MCF7 cell line. However, luminal specific comparisons have suffered from the lack of a relevant non-malignant counterpart. Our previous work has shown that transforming growth factor-β receptor (TGFβR) inhibition suffices to propagate prospectively isolated ERpos human breast luminal cells from reduction mammoplasties (HBEC)...
January 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28076321/secretion-modification-region-derived-peptide-blocks-exosome-release-and-mediates-cell-cycle-arrest-in-breast-cancer-cells
#8
Ming-Bo Huang, Ruben R Gonzalez, James Lillard, Vincent C Bond
PURPOSE: Discovery and development of a novel anticancer PEG-SMR-Clu peptide to prevent breast cancer metastasis. How breast cancer cells and primary mammary epithelial cells interact and communicate with each other to promote tumorigenesis and how to prevent tumor metastasis has long been a concern of researchers. Cancer cells secrete exosomes containing proteins and RNA. These factors can influence tumor development by directly targeting cancer cells and tumor stroma. In this study, we determined the effects of a peptide as an inhibitor of exosome secretion on breast tumors...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28075663/comparative-study-of-her-2-p53-ki-67-expression-and-clinicopathological-characteristics-of-breast-cancer-in-a-cohort-of-northern-china-female-patients
#9
Li Ding, Zijin Zhang, Yan Xu, Yongqiang Zhang
OBJECTIVE: To study the relationship among Her-2, Ki-67, p53 expression and the clinicopathologic characteristics of breast cancer in the patients of northern China. METHODS: Expression of Her-2, Ki-67, p53 and clinical characteristics of 260 breast cancer patients were retrospectively studied. RESULTS: Her-2 overexpression led to higher incidence rates of infiltrating ductal carcinoma and axillary lymph node metastasis, bigger diameters of the primary tumors, later pTNM staging, and a lower incidence rate of ductal carcinoma in situ (p < 0...
January 11, 2017: Bioengineered
https://www.readbyqxmd.com/read/28075453/mir-375-inhibits-cancer-stem-cell-phenotype-and-tamoxifen-resistance-by-degrading-hoxb3-in-human-er-positive-breast-cancer
#10
Hui Fu, Lei Fu, Chao Xie, Wen-Shu Zuo, Yan-Song Liu, Mei-Zhu Zheng, Jin-Ming Yu
Cancer stem cell (CSC) formation and epithelial-mesenchymal transition (EMT) are pivotal events in tumor cell invasion and metastasis. They have been shown to occur in resistance to tamoxifen. Moreover, microRNAs (miRNAs) have been associated with CSCs, EMT as well as tamoxifen resistance. Studying molecular mechanism of CSCs, EMT as well as tamoxifen resistance will help us to further understand the pathogenesis and progression of the disease and offer new targets for effective therapies. In the present study, we showed that miR-375 inhibits CSC traits in breast cancer MCF-7 cells...
January 9, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28074989/-antidepressants-agents-in-breast-cancer-patients-using-tamoxifen-review-of-basic-and-clinical-evidence
#11
María Elisa Irarrázaval O, Leonardo Gaete G
Tamoxifen (Tmf), is a standard of care for women with estrogen receptor positive (ER+) breast cancer. Endoxifen is a Tmf metabolite generated by cytochrome P450 2D6 (CYP2D6). Antidepressive agents (AD) are often prescribed to women with breast cancer not only for depression, but also for anxiety and hot flashes. Some AD are substrates or inhibitors of the Tmf metabolic pathway. Therefore there may be interactions when Tmf and AD are prescribed simultaneously. Oncologic protection afforded by Tmf may become less effective or null when AD are indicated, especially in poor metabolizing patients...
October 2016: Revista Médica de Chile
https://www.readbyqxmd.com/read/28074330/comparison-of-core-needle-biopsy-and-excision-specimens-for-the-accurate-evaluation-of-breast-cancer-molecular-markers-a-report-of-1003-cases
#12
Jie Chen, Zu Wang, Qing Lv, Zhenggui Du, Qiuwen Tan, Di Zhang, Bingjun Xiong, Helin Zeng, Juxiang Gou
In this study, we compared the accuracy of marker evaluation in core needle biopsy (CNB) specimens versus excision specimens (ESs) from breast cancer patients. This retrospective study used data collected from the breast cancer database at the West China Hospital, China. Immunohistochemistry (IHC) results from CNB specimens and ESs were compared, using estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and Ki-67 as markers. Molecular subtyping and endocrine therapy usage correlations based on CNB samples and ESs were evaluated...
January 10, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28074314/a-novel-effect-of-%C3%AE-adrenergic-receptor-on-mammary-branching-morphogenesis-and-its-possible-implications-in-breast-cancer
#13
Lucía Gargiulo, María May, Ezequiel M Rivero, Sabrina Copsel, Caroline Lamb, John Lydon, Carlos Davio, Claudia Lanari, Isabel A Lüthy, Ariana Bruzzone
Understanding the mechanisms that govern normal mammary gland development is crucial to the comprehension of breast cancer etiology. β-adrenergic receptors (β-AR) are targets of endogenous catecholamines such as epinephrine that have gained importance in the context of cancer biology. Differences in β2-AR expression levels may be responsible for the effects of epinephrine on tumor vs non-tumorigenic breast cell lines, the latter expressing higher levels of β2-AR. To study regulation of the breast cell phenotype by β2-AR, we over-expressed β2-AR in MCF-7 breast cancer cells and knocked-down the receptor in non-tumorigenic MCF-10A breast cells...
January 11, 2017: Journal of Mammary Gland Biology and Neoplasia
https://www.readbyqxmd.com/read/28071616/presenting-features-treatment-patterns-and-outcomes-of-patients-with-breast-cancer-in-pakistan-experience-at-a-university-hospital
#14
S Kumar, A J Shaikh, Y A Rashid, N Masood, Atv Mohammed, U Z Malik, G Haider, N Niamutullah, S Khan
BACKGROUND: Breast cancer is the most common cancer in Pakistani women. We report the presenting features, treatment patterns and survival of breast cancer from a University Hospital in Southern Pakistan and compare the data with international population based studies. MATERIALS AND METHODS: Medical records of patients diagnosed to have breast cancer between January 1999 and November 2008 were reviewed retrospectively. RESULTS: A total of 845 patients were identified...
April 2016: Indian Journal of Cancer
https://www.readbyqxmd.com/read/28071613/clinical-and-pathologic-response-following-taxane-based-neoadjuvant-chemotherapy-in-locally-advanced-breast-cancer-patients-in-a-tertiary-care-centre-in-india
#15
Masillamany Sivasanker, S C Sistla, S Ali Manwar, S Vivekanandam
BACKGROUND: Neoadjuvant chemotherapy has become the standard recommendation in the management of patients with locally advanced breast cancer. At present anthracycline based regimen such as CAF (cyclophosphamide, adriamycin and 5-FU) is widely used in clinical practice. The introduction of taxanes has revolutionized this field because of superior results. AIMS AND OBJECTIVES: This study is designed to compare the efficacy of paclitaxel plus doxorubicin regimen and CAF (cyclophosphamide, doxorubicin and 5-fluorouracil) regimen as neoadjuvant treatment of locally advanced breast cancer and to compare their toxicity profiles and also to correlate the hormonal receptor status in predicting response to the NACT...
April 2016: Indian Journal of Cancer
https://www.readbyqxmd.com/read/28070831/the-prolyl-oligopeptidase-inhibitor-suam-14746-attenuates-the-proliferation-of-human-breast-cancer-cell-lines-in-vitro
#16
Satoshi Tanaka, Kanayo Suzuki, Minoru Sakaguchi
BACKGROUND: Prolyl oligopeptidase (POP, EC 3.4.1.26) is a serine peptidase that hydrolyzes post-proline peptide bonds in peptides that are <30 amino acids in length. We previously reported that POP inhibition suppressed the growth of NB-1 human neuroblastomas cells and KATO III human gastric cancer cells. POP activity is commonly elevated in many cancers, which includes breast cancer. However, the effect of POP inhibition as a candidate breast cancer therapy is unknown. METHODS: The effects of POP inhibition and knockdown on the proliferation of cultured human estrogen receptor-positive (ER+) MCF7 and T47D, and ER-negative (ER-) MDA-MB-231 breast cancer cell lines and the MCF12A non-tumorigenic epithelial cell line were tested by analyzing their influence on cell proliferation (WST-1 assay), cell viability (trypan blue exclusion assay), and cell cycle arrest (cell cycle analysis, cell cycle regulator proteins expression)...
January 9, 2017: Breast Cancer: the Journal of the Japanese Breast Cancer Society
https://www.readbyqxmd.com/read/28068434/annexin-s100a-protein-family-regulation-through-p14arf-p53-activation-a-role-in-cell-survival-and-predicting-treatment-outcomes-in-breast-cancer
#17
Diana Hatoum, Daniel Yagoub, Alireza Ahadi, Najah T Nassif, Eileen M McGowan
The annexin family and S100A associated proteins are important regulators of diverse calcium-dependent cellular processes including cell division, growth regulation and apoptosis. Dysfunction of individual annexin and S100A proteins is associated with cancer progression, metastasis and cancer drug resistance. This manuscript describes the novel finding of differential regulation of the annexin and S100A family of proteins by activation of p53 in breast cancer cells. Additionally, the observed differential regulation is found to be beneficial to the survival of breast cancer cells and to influence treatment efficacy...
2017: PloS One
https://www.readbyqxmd.com/read/28065411/ki67-assessment-in-breast-cancer-an-update
#18
Frederique Penault-Llorca, Nina Radosevic-Robin
Although immunohistochemical detection of the Ki67 antigen has been used for many years to assess cancer proliferation, this marker is still not recommended for routine use in clinical management of breast cancer. The major reason for this situation is a lack of a standardised procedure for Ki67 assessment as well as persistence of several issues of debate with regards to the Ki67 assay interpretation and the marker's clinical utility. Nowadays Ki67 assessment is principally used for estimation of prognosis and guiding the decision on adjuvant treatment choice, as well as for prediction of response to neoadjuvant treatment in ER+/HER2- breast cancer...
January 5, 2017: Pathology
https://www.readbyqxmd.com/read/28063929/mir-148a-and-mir-152-reduce-tamoxifen-resistance-in-er-breast-cancer-via-downregulating-alcam
#19
Ming-Jenn Chen, Ya-Min Cheng, Chien-Chung Chen, Yu-Chieh Chen, Ching-Ju Shen
Activated leukocyte cell adhesion molecule (ALCAM), also called CD166 is a 105-kDa transmembrane glycoprotein of the immunoglobin superfamily. In this study, we studied the association between ALCAM expression and tamoxifen resistance in ER + breast cancer and further investigated how ALCAM is regulated in the cancer cells. IHC staining data showed that the tumor tissues from non-responders (N = 20) generally had significantly stronger ALCAM staining than that from tamoxifen responders (N = 16). In vitro cell assay also confirmed ALCAM upregulation in tamoxifen resistant (TamR) MCF-7 cells than in tamoxifen sensitive (TamS) MCF-7 cells...
January 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28061893/prognostic-significance-of-ki67-in-chinese-women-diagnosed-with-er-her2-breast-cancers-by-the-2015%C3%A2-st-gallen-consensus-classification
#20
Yue Hu, Ran Gu, Jinghua Zhao, Yaping Yang, Fengtao Liu, Liang Jin, Kai Chen, Haixia Jia, Hongli Wang, Qiang Liu, Fengxi Su, Weijuan Jia
BACKGROUND: This study evaluated the distribution pattern of the Ki67-labeling index (LI) among patients at a Chinese breast cancer center, and analyzed its prognostic significance in the 2015 St Gallen consensus breast cancer classification, estrogen receptor-positive and human epidermal growth factor receptor 2-negative(ER(+)/HER2(-))subtype. METHODS: We classified 939 women with ER(+)/HER2(-) breast cancer into three groups by Ki67-LI levels, and followed their clinicopathologic characteristics and prognoses...
January 6, 2017: BMC Cancer
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