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https://www.readbyqxmd.com/read/28812388/silk-nanoparticles-proof-of-lysosomotropic-anticancer-drug-delivery-at-single-cell-resolution
#1
John D Totten, Thidarat Wongpinyochit, F Philipp Seib
Silk nanoparticles are expected to improve chemotherapeutic drug targeting to solid tumours by exploiting tumour pathophysiology, modifying the cellular pharmacokinetics of the payload and ultimately resulting in trafficking to lysosomes and triggering drug release. However, experimental proof for lysosomotropic drug delivery by silk nanoparticles in live cells is lacking and the importance of lysosomal pH and enzymes controlling drug release is currently unknown. Here, we demonstrate, in live single human breast cancer cells, the role of the lysosomal environment in determining silk nanoparticle-mediated drug release...
August 16, 2017: Journal of Drug Targeting
https://www.readbyqxmd.com/read/28810804/clinically-relevant-changes-in-clozapine-serum-concentrations-after-breast-reduction-surgery
#2
Georgios Schoretsanitis, André Kirner-Veselinovic, Gerhard Gründer, Michael Paulzen
No abstract text is available yet for this article.
August 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/28810532/plga-ctab-curcumin-nanoparticles-fabrication-characterization-and-molecular-basis-of-anticancer-activity-in-triple-negative-breast-cancer-cell-lines-mda-mb-231-cells
#3
Ramovatar Meena, Sumit Kumar, Raj Kumar, Usha Singh Gaharwar, Paulraj Rajamani
Triple-negative breast cancers (TNBC) are aggressive cancers, which do not control by hormonal therapy or therapies that target HER-2 receptors. Curcumin (Cur) has shown cytotoxic effects in multiple cancer cell lines. However, its medical uses remain limited due to low aqueous solubility and poor bioavailability. Therefore, present study was aimed to fabricate the small positive charge curcumin nanoparticles (CN) by nanoprecipitation methods using PLGA and CTAB, and to evaluate its anticancer efficacy and underlying the mechanism in triple negative breast cancer cell lines (MDA-MB-231 cells)...
August 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28810293/-comparative-study-of-three-different-decalcifying-solutions-in-bone-metastasis-specimens-with-breast-cancer
#4
H Y Wu, T Wang, K L Chen, Z W Fan, X H Pu, B Zhang, X S Fan, F Q Meng
Objective: To investigate the optimal strategy for immunohistochemical (IHC) staining in bone metastasis specimens from breast cancer. Methods: Twenty-eight bone metastases specimens from breast cancers were divided into three groups and subjected to different decalcifying agents (group A-10% nitrate, group B-EDTA decalcification, and group C-imported decalcifying solution RapidCal). The effects of those on HE and IHC staining for Ki-67, ER, PR, GATA3, RANK, RANKL, HER2 and HER2 FISH results were assessed. Results: There were no significant differences among three groups in HE morphology and IHC staining...
August 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28806782/the-use-of-18f-fluoro-deoxy-glucose-positron-emission-tomography-18f-fdg-pet-as-a-non-invasive-pharmacodynamic-biomarker-to-determine-the-minimally-pharmacologically-active-dose-of-azd8835-a-novel-pi3k%C3%AE-inhibitor
#5
Juliana Maynard, Sally-Ann Emmas, Francois-Xavier Ble, Herve Barjat, Emily Lawrie, Urs Hancox, Urszula M Polanska, Alison Pritchard, Kevin Hudson
BACKGROUND: The phosphatidyl inositol 3 kinase (PI3K), AKT and mammalian target of rapamycin (mTOR) signal transduction pathway is frequently de-regulated and activated in human cancer and is an important therapeutic target. AZD8835 is a PI3K inhibitor, with selectivity against PI3K α and δ isoforms, which is currently in Phase 1 clinical trials. 18F-Fluoro-deoxy-glucose positron emission tomography (18F-FDG PET) is a non-invasive pharmacodynamic imaging biomarker that has become an integral part of drug development...
2017: PloS One
https://www.readbyqxmd.com/read/28806712/association-between-background-parenchymal-enhancement-and-pathologic-complete-remission-throughout-the-neoadjuvant-chemotherapy-in-breast-cancer-patients
#6
Chao You, Weijun Peng, Wenxiang Zhi, Min He, Guangyu Liu, Li Xie, Luan Jiang, Xiaoxin Hu, Xuxia Shen, Yajia Gu
PURPOSE: To retrospectively investigate the quantitative background parenchymal enhancement (BPE) of the contralateral normal breast in patients with unilateral invasive breast cancer throughout multiple monitoring points of neoadjuvant chemotherapy (NAC) and to further determine whether BPE is associated with tumor response, especially at the early stage of NAC. MATERIALS AND METHODS: A total of 90 patients with unilateral breast cancer who then received six or eight cycles of NAC before surgery were analyzed retrospectively...
August 11, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28805722/estrogen-repression-of-micrornas-is-associated-with-high-guanine-content-in-the-terminal-loop-sequences-of-their-precursors
#7
Amit Cohen, Mario Alberto Burgos-Aceves, Tamar Kahan, Yoav Smith
Widespread microRNA (miRNA) repression is a phenomenon observed in mammals after exposure to cigarette smoke and in many types of cancer. A comprehensive reduction in miRNA expression after treatment with the hormone estrogen has also previously been described. Here, we reveal a conserved association of miRNA downregulation after estrogen exposure in zebrafish, mouse, and human breast cancer cell line, with a high guanine content in the terminal loop sequences of their precursors, and offer a possible link between estrogen-related miRNA-adducts formation and carcinogenesis...
August 14, 2017: Biomedicines
https://www.readbyqxmd.com/read/28804730/breast-dose-reduction-with-organ-based-wide-angle-tube-current-modulated-ct
#8
Wanyi Fu, Gregory M Sturgeon, Greeshma Agasthya, William Paul Segars, Anuj J Kapadia, Ehsan Samei
This study aimed to estimate the organ dose reduction potential for organ-dose-based tube current modulated (ODM) thoracic computed tomography (CT) with a wide dose reduction arc. Twenty-one computational anthropomorphic phantoms (XCAT) were used to create a virtual patient population with clinical anatomic variations. The phantoms were created based on patient images with normal anatomy (age range: 27 to 66 years, weight range: 52.0 to 105.8 kg). For each phantom, two breast tissue compositions were simulated: [Formula: see text] and [Formula: see text] (glandular-to-adipose ratio)...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28803991/dhea-increases-epithelial-markers-and-decreases-mesenchymal-proteins-in-breast-cancer-cells-and-reduces-xenograft-growth
#9
Zaira Colín-Val, Viridiana Yazmín González-Puertos, Criselda Mendoza-Milla, Erika Olivia Gómez, Claudia Huesca-Gómez, Rebeca López-Marure
Breast cancer is one of the most common neoplasias and the leading cause of cancer death in women worldwide. Its high mortality rate is linked to a great metastatic capacity associated with the epithelial-mesenchymal transition (EMT). During this process, a decrease in epithelial proteins expression and an increase of mesenchymal proteins are observed. On the other hand, it has been shown that dehydroepiandrosterone (DHEA), the most abundant steroid in human plasma, inhibits migration of breast cancer cells; however, the underlying mechanisms have not been elucidated...
August 10, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28803675/the-yale-fitness-intervention-trial-in-female-cancer-survivors-cardiovascular-and-physiological-outcomes
#10
M Tish Knobf, Sangchoon Jeon, Barbara Smith, Lyndsay Harris, Siobhan Thompson, Mitchel R Stacy, Karl Insogna, Albert J Sinusas
BACKGROUND: Induced premature menopause and cardio-toxic therapy increase cardiovascular disease risk in female cancer survivors. OBJECTIVE: To compare the effects of a 12 month aerobic-resistance fitness center intervention to home based physical activity on cardiovascular function and metabolic risk factors. METHODS: Subjects (N = 154) who had completed primary and/or adjuvant chemotherapy (past 3 years) were randomized to a fitness center intervention or a home based group...
August 10, 2017: Heart & Lung: the Journal of Critical Care
https://www.readbyqxmd.com/read/28803384/does-obesity-modify-the-relationship-between-physical-activity-and-breast-cancer-risk
#11
REVIEW
S E Neil-Sztramko, T Boyle, E Milosevic, S F Nugent, C C Gotay, K L Campbell
PURPOSE: With only 5-10% of breast cancer cases attributed to genetic inheritance, prevention efforts have focused on modifiable risk factors. Physical activity plays a role in reducing breast cancer risk; however, the interaction between physical activity and other modifiable risk factors, such as obesity, has received little attention. METHODS: A systematic review and meta-analysis was conducted of studies examining the relationship between physical activity and breast cancer and how it may be modified by body mass index (BMI)...
August 12, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28801846/vascular-function-in-breast-cancer-survivors-on-aromatase-inhibitors-a-pilot-study
#12
Anne Blaes, Heather Beckwith, Natalia Florea, Robert Hebbel, Anna Solovey, David Potter, Douglas Yee, Rachel Vogel, Russell Luepker, Daniel Duprez
PURPOSE: Aromatase inhibitors (AI) have been shown to reduce breast cancer-related mortality in women with estrogen positive (ER+) breast cancer. The use of AIs, however, has been associated with higher rates of hypertension, hyperlipidemia, and cardiovascular (CV) events. METHODS: A cross-sectional study of 25 healthy postmenopausal women and 36 women with curative intent breast cancer on an AI was performed to assess endothelial dysfunction, an indicator of risk for CV events...
August 11, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28799743/reducing-interstitial-fluid-pressure-ifp-and-inhibiting-pulmonary-metastasis-of-breast-cancer-by-gelatin-modified-cationic-lipid-nanoparticles
#13
Xuan Gao, Jun Zhang, Zun Huang, Tiantian Zuo, Qing Lu, Guangyu Wu, Qi Shen
Interstitial fluid pressure (IFP) in tumor is much higher than that in normal tissue and it constitutes a great obstacle for the delivery of anti-tumor drugs, which makes it a potential target for cancer therapy. In this study, cationic nanostructured lipid carriers (NLCs) were modified by gelatin with low molecular weight in order to achieve the desirable reduction of tumor IFP and improve the drug delivery as well as the chemotherapy on tumor proliferation and pulmonary metastasis. The nanoparticles were used to entrap three drugs - docetaxel (DTX), quercetin (Qu) and imatinib (IMA) - with high encapsulation efficiency of 89...
August 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28798401/the-tyrosine-kinase-inhibitor-nintedanib-activates-shp-1-and-induces-apoptosis-in-triple-negative-breast-cancer-cells
#14
Chun-Yu Liu, Tzu-Ting Huang, Pei-Yi Chu, Chun-Teng Huang, Chia-Han Lee, Wan-Lun Wang, Ka-Yi Lau, Wen-Chun Tsai, Tzu-I Chao, Jung-Chen Su, Ming-Huang Chen, Chung-Wai Shiau, Ling-Ming Tseng, Kuen-Feng Chen
Triple-negative breast cancer (TNBC) remains difficult to treat and urgently needs new therapeutic options. Nintedanib, a multikinase inhibitor, has exhibited efficacy in early clinical trials for HER2-negative breast cancer. In this study, we examined a new molecular mechanism of nintedanib in TNBC. The results demonstrated that nintedanib enhanced TNBC cell apoptosis, which was accompanied by a reduction of p-STAT3 and its downstream proteins. STAT3 overexpression suppressed nintedanib-mediated apoptosis and further increased the activity of purified SHP-1 protein...
August 11, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28797930/%C3%AE-tocotrienol-induced-disruption-of-lipid-rafts-in-human-breast-cancer-cells-is-associated-with-a-reduction-in-exosome-heregulin-content
#15
Osama A Alawin, Rayan A Ahmed, Venkateshwararao Dronamraju, Karen P Briski, Paul W Sylvester
Overexpression of heregulin, a potent ligand that activates HER3 and HER4 receptors, plays a significant role in the development of chemotherapy resistance in breast cancer patients. Exosomes released from cancer cells are small vesicles originating from the outward budding of lipid rafts that carry various mitogenic proteins that then act locally in an autocrine/paracrine manner to stimulate cancer cell growth. Since the anticancer activity of γ-tocotrienol has been shown to be mediated in part through the disruption of lipid rafts, studies were conducted to determine the effect of γ-tocotrienol on exosomes mitogenic biopotency...
July 10, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28795842/recommendations-for-pathologic-evaluation-of-reduction-mammoplasty-specimens-a-prospective-study-with-systematic-tissue-sampling
#16
Abiy B Ambaye, Andrew J Goodwin, Susan E MacLennan, Shelly Naud, Donald L Weaver
CONTEXT: - Breast reduction mammaplasty (RMP) for symptomatic macromastia or correction of asymmetry is performed in more than 100 000 patients per year in the United States. The reported incidence of significant pathologic findings (SPF), that is, carcinoma and atypical hyperplasia, ranges from 0.06% to 12.8%. No standard pathology assessment for RMP exists. OBJECTIVES: - To propose standard sampling for microscopic evaluation in RMP specimens, to evaluate the incidence of occult carcinoma and atypical hyperplasia, and to identify clinical risk factors for SPF in patients undergoing RMP...
August 10, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/28795403/prostate-and-breast-cancer-in-four-nordic-countries-a-comparison-of-incidence-and-mortality-trends-across-countries-and-age-groups-1975-2013
#17
R Kvåle, T A Myklebust, G Engholm, S Heinävaara, E Wist, B Møller
In recent decades, management of prostate and breast cancer patients has changed considerably. The purpose of the present study is to interpret patterns of prostate and breast cancer incidence and mortality in four Nordic countries across age groups and time periods. Prostate and breast cancer incidence and mortality data (1975-2013) were obtained from the NORDCAN database. Joinpoint regression models were used to identify changes in the trends. A more prominent increase in prostate than breast cancer incidence was observed...
August 10, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28795252/ipet-study-an-flt-pet-window-study-to-assess-the-activity-of-the-steroid-sulfatase-inhibitor-irosustat-in-early-breast-cancer
#18
Carlo Palmieri, Richard Szydlo, Marie Miller, Laura Barker, Neva H Patel, Hironobu Sasano, Tara Barwick, Henry Tam, Dimitri Hadjiminas, Jasmin Lee, Abeer Shaaban, Hanna Nicholas, R Charles Coombes, Laura M Kenny
BACKGROUND: Steroid sulfatase (STS) is involved in oestrogen biosynthesis and irosustat is a first generation, irreversible steroid sulfatase inhibitor. A pre-surgical window-of-opportunity study with irosustat was undertaken in estrogen receptor-positive (ER+) breast cancer to assess the effect of irosustat on tumour cell proliferation as measured by 3'-deoxy-3'-[18F] fluorothymidine uptake measured by PET scanning (FLT-PET) and Ki67. METHODS: Postmenopausal women with untreated ER+ early breast cancer were recruited, and imaged with FLT-PET at baseline and after at least 2 weeks treatment with irosustat, 40 mg once daily orally...
August 9, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28792239/improving-the-nutritional-quality-and-shelf-life-of-broiler-meat-by-feeding-diets-supplemented-with-fermented-pomegranate-punica-granatum-l-by-products
#19
S T Ahmed, S-Y Ko, C-J Yang
1. Four experimental diets containing 0, 0.5, 1.0 and 2.0% fermented pomegranate by-products (FPB) were supplied to 320 day-old broilers to evaluate the effects of FPB on growth performance, nutritional composition, fatty acid profile and oxidative stability of meat. 2. Dietary supplementation of FPB linearly increased the weight gain and feed intake of broilers with linear reduction in feed conversion ratio. 3. The crude protein, iron, magnesium, and sodium content were linearly higher, whereas cholesterol was linearly lower in the breast meat of FPB supplemented broilers...
August 9, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28791441/postoperative-pain-control-by-intercostal-nerve-block-after-augmentation-mammoplasty
#20
Chang Min Kang, Woo Jeong Kim, Sean Hyuck Yoon, Chul Bum Cho, Jeong Su Shim
BACKGROUND: In breast augmentation with implant, there is severe pain due to damage from expansion of breast tissue and the pectoralis major. Therefore, the authors conducted this study to analyze the effectiveness of postoperative intercostal nerve block (ICNB) in reducing postoperative pain after breast augmentation with implant. METHOD: Forty-four female patients were enrolled in the study. Just before awaking from general anesthesia, 34 cases were injected with 0...
August 8, 2017: Aesthetic Plastic Surgery
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