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https://www.readbyqxmd.com/read/28436008/a-sea-urchin-in%C3%A2-vivo-model-to-evaluate-epithelial-mesenchymal-transition
#1
Daniele P Romancino, Letizia Anello, Antonella Lavanco, Valentina Buffa, Maria Di Bernardo, Antonella Bongiovanni
Epithelial-mesenchymal transition (EMT) is an evolutionarily conserved cellular program, which is a prerequisite for the metastatic cascade in carcinoma progression. Here, we evaluate the EMT process using the sea urchin Paracentrotus lividus embryo. In sea urchin embryos, the earliest EMT event is related to the acquisition of a mesenchymal phenotype by the spiculogenetic primary mesenchyme cells (PMCs) and their migration into the blastocoel. We investigated the effect of inhibiting the epidermal growth factor (EGF) signaling pathway on this process, and we observed that mesenchyme cell differentiation was blocked...
April 24, 2017: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28432512/squamous-cell-carcinoma-of-the-breast-in-the-united-states-incidence-demographics-tumor-characteristics-and-survival
#2
Siddhartha Yadav, Dhiraj Yadav, Dana Zakalik
PURPOSE: Squamous cell carcinoma of breast accounts for less than 0.1% of all breast cancers. The purpose of this study is to describe the epidemiology and survival of this rare malignancy. METHODS: Data were extracted from the National Cancer Institute's Surveillance, Epidemiology and End Results Registry to identify women diagnosed with squamous cell carcinoma of breast between 1998 and 2013. SEER*Stat 8.3.1 was used to calculate age-adjusted incidence, age-wise distribution, and annual percentage change in incidence...
April 21, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28432407/the-arterial-supply-of-the-nipple-areola-complex-nac-and-its-relations-an-analysis-of-angiographic-ct-imaging-for-breast-pedicle-design
#3
Aaron D Stirling, Conor P Murray, Mark A Lee
PURPOSE: To investigate the blood supply to the nipple areola complex (NAC) on thoracic CT angiograms (CTA) to improve breast pedicle design in reduction mammoplasty. METHODS: In a single centre, CT scans of the thorax were retrospectively reviewed for suitability by a cardiothoracic radiologist. Suitable scans had one or both breasts visible in extended fields, with contrast enhancement of breast vasculature in a female patient. The arterial sources, intercostal space perforated, glandular/subcutaneous course, vessel entry point, and the presence of periareolar anastomoses were recorded for the NAC of each breast...
April 21, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28429737/the-glutamate-cystine-xct-antiporter-antagonizes-glutamine-metabolism-and-reduces-nutrient-flexibility
#4
Chun-Shik Shin, Prashant Mishra, Jeramie D Watrous, Valerio Carelli, Marilena D'Aurelio, Mohit Jain, David C Chan
As noted by Warburg, many cancer cells depend on the consumption of glucose. We performed a genetic screen to identify factors responsible for glucose addiction and recovered the two subunits of the xCT antiporter (system xc(-)), which plays an antioxidant role by exporting glutamate for cystine. Disruption of the xCT antiporter greatly improves cell viability after glucose withdrawal, because conservation of glutamate enables cells to maintain mitochondrial respiration. In some breast cancer cells, xCT antiporter expression is upregulated through the antioxidant transcription factor Nrf2 and contributes to their requirement for glucose as a carbon source...
April 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28423566/the-diagnostic-role-of-microrna-34a-in-breast-cancer-a-systematic-review-and-meta-analysis
#5
Saber Imani, Xianqin Zhang, Hossein Hosseinifard, Shangyi Fu, Junjiang Fu
BACKGROUND: MicroRNA-34a (miR-34a) is a master regulator of tumor suppression in breast cancer (BC). This systematic review aims to analyze the diagnostic accuracy of miR-34a in the detection of BC as a biomarker. RESULTS: A total of 1858 BC cases and 494 controls from thirteen eligible studies reported in 9 publications were included. The overall pooled sensitivity, specificity, negative likelihood ratio (NLR), positive likelihood ratio (PLR), and diagnostic odds ratio (DOR) were 85...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423275/single-or-multiple-access-channels-to-the-cyp450s-active-site-an-answer-from-free-energy-simulations-of-the-human-aromatase-enzyme
#6
Alessandra Magistrato, Jacopo Sgrignani, Rolf Krause, Andrea Cavalli
Cytochromes P450 (CYP450s), in particular, CYP19A1 and CYP17A1, are key clinical targets of breast and prostate anticancer therapies, critical players in drug metabolism, and their overexpression in tumors is associated with drug resistance. In these enzymes, ligand (substrates, drugs) metabolism occurs in deeply buried active sites accessible only via several grueling channels, whose exact biological role remains unclear. Gaining direct insights on the mechanism by which ligands travel in and out is becoming increasingly important given that channels are involved in the modulation of binding/dissociation kinetics and the specificity of ligands toward a CYP450...
April 24, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28422090/surgical-treatment-in-paget-s-disease-with-invasive-ductal-carcinoma-an-observational-study-based-on-seer
#7
Qi Wu, Xiaojun Ding, Juanjuan Li, Si Sun, Shan Zhu, Juan Wu, Qian Liu, Feng Yao, Shengrong Sun
The aim is to analyse the clinical presentation, treatment and outcomes in patients with Paget's disease with invasive ductal carcinoma (PD-IDC), with special emphasis on the role of surgical treatment. Using data obtained by the Surveillance, Epidemiology, and End Results (SEER) program from 2010-2013, we investigated the differences in characteristics, overall survival (OS), and breast cancer-specific mortality (BCSM) between patients with PD-IDC and those with invasive ductal carcinoma (IDC). Compared with IDC group, patients with PD-IDC had a better prognosis and lower mortality in adjusted analyses...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28421725/no-association-of-positive-superficial-and-or-deep-margins-with-local-recurrence-in-invasive-breast-cancer-treated-with-breast-conserving-surgery
#8
Tae In Yoon, Jong Won Lee, Sae Byul Lee, Guiyun Sohn, Jisun Kim, Il Young Chung, Hee Jeong Kim, Beom Seok Ko, Byung Ho Son, Gyungyub Gong, Sung-Bae Kim, Su Ssan Kim, Seung Do Ahn, Minsung Chung, Sei Hyun Ahn
Purpose: We evaluated the effect of positive superficial and/or deep margin status on local recurrence (LR) in invasive breast cancer treated with breast-conserving surgery (BCS) followed by radiotherapy. Materials and Methods: In total, 3403 stage 1 and 2 invasive breast cancer patients treated with BCS followed by radiotherapy from January 2000 to December 2008 were included in this study. These patients were divided into 3 groups according to margin status: clear resection margin status for all sections (group 1, n = 3195); positive margin status in superficial and/or deep sections (group 2, n = 121); and positive peripheral parenchymal margin regardless of superficial and/or deep margin involvement (group 3, n = 87)...
April 14, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28419815/diagnostic-performance-of-and-breast-tissue-changes-at-early-breast-mr-imaging-surveillance-in-women-after-breast-conservation-therapy
#9
Eun Jeong Kim, Bong Joo Kang, Sung Hun Kim, In Kyung Youn, Ji Eun Baek, Hyun Sil Lee
Purpose To investigate the diagnostic performance and tissue changes in early (1 year or less) breast magnetic resonance (MR) imaging surveillance in women who underwent breast conservation therapy for breast cancer. Materials and Methods This prospective study was approved by the institutional review board, and written informed consent was obtained. Between April 2014 and June 2016, 414 women (mean age, 51.5 years; range, 21-81 years) who underwent 422 early surveillance breast MR imaging examinations (median, 6...
April 18, 2017: Radiology
https://www.readbyqxmd.com/read/28417238/bilateral-mastectomy-as-overtreatment-for-breast-cancer-in-women-age-forty-years-and-younger-with-unilateral-operable-invasive-breast-cancer
#10
Cory A Donovan, Jean Bao, Alexandra Gangi, Farin Amersi, Xiao Zhang, Armando E Giuliano, Alice P Chung
BACKGROUND: Young women with breast cancer (BC) have an increased risk of contralateral breast cancer (CBC) compared with older women. This may contribute to the rising rates of bilateral mastectomy (BM), but it is unclear if BM leads to improved outcomes. METHODS: A prospectively maintained database was reviewed. Patient and tumor characteristics, survival, and rate of CBC were compared in women age ≤40 years treated for unilateral Stage 1-3 BC from January 2000 through December 2013...
April 17, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28416989/immediate-breast-reconstruction-of-a-nipple-areolar-lumpectomy-defect-with-the-l-flap-skin-paddle-breast-reduction-design-and-contralateral-reduction-mammoplasty-symmetry-procedure-optimizing-the-oncoplastic-surgery-multispecialty-approach
#11
Mitchell Buller, Adee Heiman, Jared Davis, Thomas J Lee, Nicolás Ajkay, Bradon J Wilhelmi
Objective: We describe a modification of the inferior pedicle reduction mammoplasty for oncoplastic reconstruction of a central tumor defect. Our technique involved a deepithelialized L-shaped medial inferior based flap with removal of lateral breast tissue after central lumpectomy with a contralateral Wise-pattern mastopexy with inferior pedicle for symmetry. This technique is ideal for patients with large, ptotic breasts that desire breast conservation with immediate reconstruction. Methods: A 47-year-old woman with size 38 DD breasts presented with a palpable 2-cm subareolar mass of the left breast...
2017: Eplasty
https://www.readbyqxmd.com/read/28416489/nrf2-induction-supporting-breast-cancer-cell-survival-is-enabled-by-oxidative-stress-induced-dpp3-keap1-interaction
#12
Kevin Lu, Allen L Alcivar, Jianglin Ma, Tzeh K Foo, Susan Zwyea, Amar Mahdi, Yanying Huo, Thomas W Kensler, Michael L Gatza, Bing Xia
NRF2 is a transcription factor serving as a master regulator of the expression of many genes involved in cellular responses to oxidative and other stresses. In the absence of stress, NRF2 is constantly synthesized but maintained at low levels as it is targeted by KEAP1 for ubiquitination and proteasome-mediated degradation. NRF2 binds KEAP1 mainly through a conserved "ETGE" motif that has also been found in several other proteins, such as DPP3, which has been shown to bind KEAP1 and enhance NRF2 function upon overexpression...
April 17, 2017: Cancer Research
https://www.readbyqxmd.com/read/28415667/effect-of-radiotherapy-after-breast-conserving-surgery-in-older-patients-with-early-breast-cancer-and-breast-ductal-carcinoma-in-situ-a-meta-analysis
#13
Xuan-Zhang Huang, You Chen, Wen-Jun Chen, Xi Zhang, Cong-Cong Wu, Chao-Ying Zhang, Shuang-Shuang Sun, Jian Wu
BACKGROUND: There are no consistent agreements on whether radiotherapy after breast-conserving surgery (BCS) could provide local control and survival benefit for older patients with early breast cancer or breast ductal carcinoma in situ (DCIS). The present study aimed to evaluate the efficacy of radiotherapy after BCS in older patients with early breast cancer or DCIS. RESULTS: Radiotherapy could reduce the risk of local relapse in older patients with early breast cancer...
March 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414682/a-left-main-coronary-artery-thrombus-presenting-as-a-non-st-elevation-mi
#14
U Ezema, D Daberkow, T Delord, L Guidry, N R Sells
INTRODUCTION: Left main coronary artery (LMCA); thrombus with an acute myocardial infarction identified with coronary angiography is a clinically rare condition with an extremely high mortality rate. We present a case of LMCA thrombus that presented as a non-ST elevation myocardial infarction (NSTEMI);. CASE: A 45-year-old woman with a history of tobacco use and hyperlipidemia presented with a complaint of 10/10 "hard pain" across her chest radiating to her left shoulder and breast which woke her from sleep...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28414115/cost-analysis-of-a-surgical-consensus-guideline-in-breast-conserving-surgery
#15
Jennifer Yu, Leisha C Elmore, Amy E Cyr, Rebecca L Aft, William E Gillanders, Julie A Margenthaler
BACKGROUND: The SSO/ASTRO consensus statement was the first professional guideline in breast oncology to declare "no ink on tumor" as a negative margin in patients with stages I/II breast cancer undergoing breast conservation therapy (BCT). We sought to analyze the financial impact of this guideline at our institution using a historic cohort. STUDY DESIGN: We identified women undergoing re-excision following breast-conserving surgery for invasive breast cancer from 2010-2013 using a prospectively-maintained institutional database...
April 14, 2017: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/28412966/tfap2a-is-a-component-of-the-zeb1-2-network-that-regulates-tgfb1-induced-epithelial-to-mesenchymal-transition
#16
Yoana Dimitrova, Andreas J Gruber, Nitish Mittal, Souvik Ghosh, Beatrice Dimitriades, Daniel Mathow, William Aaron Grandy, Gerhard Christofori, Mihaela Zavolan
BACKGROUND: The transition between epithelial and mesenchymal phenotypes (EMT) occurs in a variety of contexts. It is critical for mammalian development and it is also involved in tumor initiation and progression. Master transcription factor (TF) regulators of this process are conserved between mouse and human. METHODS: From a computational analysis of a variety of high-throughput sequencing data sets we initially inferred that TFAP2A is connected to the core EMT network in both species...
April 17, 2017: Biology Direct
https://www.readbyqxmd.com/read/28412323/single-cpg-site-methylation-controls-estrogen-receptor-gene-transcription-and-correlates-with-hormone-therapy-resistance
#17
Kouki Tsuboi, Takamasa Nagatomo, Tatsuyuki Gohno, Toru Higuchi, Shunta Sasaki, Natsu Fujiki, Masafumi Kurosumi, Hiroyuki Takei, Yuri Yamaguchi, Toshifumi Niwa, Shin-Ichi Hayashi
Hormone therapy is the most effective treatment for patients with estrogen receptor α-positive breast cancers. However, although resistance occurs during treatment in some cases and often reflects changed estrogen receptor α status, the relationship between changes in estrogen receptor α expression and resistance to therapy are poorly understood. In this study, we identified a mechanism for altered estrogen receptor α expression during disease progression and acquired hormone therapy resistance in aromatase inhibitor-resistant breast cancer cell lines...
April 12, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28408621/endocrine-therapy-initiation-and-medical-oncologist-utilization-among-women-diagnosed-with-ductal-carcinoma-in-situ
#18
Chelsea Anderson, Anne Marie Meyer, Stephanie B Wheeler, Lei Zhou, Katherine E Reeder-Hayes, Hazel B Nichols
BACKGROUND: Though randomized clinical trials have demonstrated a reduction in second breast events with endocrine therapy among women with ductal carcinoma in situ (DCIS), use of these therapies remains highly variable. The purpose of this study was to evaluate patient and treatment-related factors associated with endocrine therapy initiation and medical oncology specialty utilization after DCIS. MATERIALS AND METHODS: We identified women with a DCIS diagnosis during 2006-2010 in the North Carolina Central Cancer Registry with linked public and private insurance claims in the University of North Carolina Integrated Cancer Information Surveillance System data resource...
April 13, 2017: Oncologist
https://www.readbyqxmd.com/read/28407247/using-the-21-gene-assay-from-core-needle-biopsies-to-choose-neoadjuvant-therapy-for-breast-cancer-a-multicenter-trial
#19
Harry D Bear, Wen Wan, André Robidoux, Peter Rubin, Steven Limentani, Richard L White, James Granfortuna, Judith O Hopkins, Dwight Oldham, Angel Rodriguez, Amy P Sing
OBJECTIVE: We hypothesized that the Oncotype Dx(®) 21-gene Recurrence Score (RS) could guide neoadjuvant systemic therapy (NST) to facilitate breast conserving surgery (BCS) for hormone receptor positive (HR+) breast cancers. METHODS: This study enrolled patients with HR+, HER2-negative, invasive breast cancers not suitable for BCS (size ≥ 2 cm). Core needle biopsy blocks were tested. For tumors with RS < 11, patients received hormonal therapy (NHT); patients with RS > 25 tumors received chemotherapy (NCT); patients with RS 11-25 were randomized to NHT or NCT...
April 13, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28405101/the-feasibility-study-of-a-hybrid-coplanar-arc-technique-versus-hybrid-intensity-modulated-radiotherapy-in-treatment-of-early-stage-left-sided-breast-cancer-with-simultaneous-integrated-boost
#20
Yuan-Gui Chen, An-Chuan Li, Wen-Yao Li, Miao-Yun Huang, Xiao-Bo Li, Ming-Qiu Chen, Mutian Zhang, Ben-Hua Xu
This study demonstrated the feasibility and advantages of a hybrid, volumetric arc therapy technique that used two 90° coplanar arcs and two three-dimensional conformal tangential beams in the simultaneous-integrated boost radiotherapy of left-sided breast cancer after breast-conserving surgery. A total of nine patients with stage I, left-sided breast cancer who underwent breast-conserving surgery were selected for this retrospective study. For each patient, a hybrid arc plan was generated and then compared with two hybrid intensity-modulated radiotherapy plans...
January 2017: Journal of Medical Physics
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