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https://www.readbyqxmd.com/read/29166145/effect-of-background-luminance-level-on-the-assessment-of-color-visual-acuity-using-colored-landolt-rings-in-young-healthy-subjects
#1
Yoshiki Tanaka, Sho Yokoyama, Rie Horai, Takashi Kojima, Sato Hiroyuki, Yukihito Kato, Mari Takagi, Hideki Nakamura, Kiyoshi Tanaka, Kazuo Ichikawa, Shoko Tanabe
PURPOSE: To evaluate the color visual acuity (CVA) of young healthy subjects using colored Landolt rings and the effect of background luminance level on the CVA. MATERIALS AND METHODS: We measured the CVA of 20 young healthy subjects (age: 23.8 ± 3.8 years) with different colors using a computer and a liquid crystal display, with 15 Landolt ring colors (30 cd/m(2)) with a background luminance of 30 cd/m(2), and then 100 cd/m(2). We then used different background luminance levels (15-50 cd/m(2)) using four Landolt ring colors (red, green-yellow, green, and blue-green) to evaluate the effect of the background luminance level on CVA...
November 22, 2017: Current Eye Research
https://www.readbyqxmd.com/read/29166068/pure-rotational-h2-thermometry-by-ultrabroadband-coherent-anti-stokes-raman-spectroscopy
#2
Trevor L Courtney, Alexis Bohlin, Brian D Patterson, Christopher J Kliewer
Coherent anti-Stokes Raman spectroscopy (CARS) is a sensitive technique for probing highly luminous flames in combustion applications to determine temperatures and species concentrations. CARS thermometry has been demonstrated for the vibrational Q-branch and pure-rotational S-branch of several small molecules. Practical advantages of pure-rotational CARS, such as multi-species detection, reduction of coherent line mixing and collisional narrowing even at high pressures, and the potential for more precise thermometry, have motivated experimental and theoretical advances in S-branch CARS of nitrogen (N2), for example, which is a dominant species in air-fed combustion processes...
June 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29164972/molecular-subtyping-of-breast-cancer-improves-identification-of-both-high-and-low-risk-patients
#3
Maria Rossing, Olga Østrup, Wiktor W Majewski, Savvas Kinalis, Maj-Britt Jensen, Ann Knoop, Niels Kroman, Maj-Lis Talman, Thomas V O Hansen, Bent Ejlertsen, Finn C Nielsen
BACKGROUND: Transcriptome analysis enables classification of breast tumors into molecular subtypes that correlate with prognosis and effect of therapy. We evaluated the clinical benefits of molecular subtyping compared to our current diagnostic practice. MATERIALS AND METHODS: Molecular subtyping was performed on a consecutive and unselected series of 524 tumors from women with primary breast cancer (n = 508). Tumors were classified by the 256 gene expression signature (CIT) and compared to conventional immunohistochemistry (IHC) procedures...
November 22, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29164917/efficacy-and-safety-of-palbociclib-in-heavily-pretreated-patients-with-hr-her2-%C3%A2-metastatic-breast-cancer
#4
Marija Ban, Branka Petrić Miše, Ana Majić, Ivanka Dražić, Eduard Vrdoljak
AIM: CDK4/6 inhibitors in the first and second treatment line in patients with HR+/HER2- metastatic breast cancer (mBC) in combination with hormonal therapy improve progression free survival. Role of CDK4/6 inhibitors in further treatment lines remains unclear. METHODS: Retrospective analysis of 24 HR+/HER2- heavily pretreated mBC patients is presented. RESULTS: A total of 58.3% patients achieved stable disease. No objective response was observed...
November 22, 2017: Future Oncology
https://www.readbyqxmd.com/read/29164420/brcasearch-written-pre-test-information-and-brca1-2-germline-mutation-testing-in-unselected-patients-with-newly-diagnosed-breast-cancer
#5
Martin P Nilsson, Therese Törngren, Karin Henriksson, Ulf Kristoffersson, Anders Kvist, Barbro Silfverberg, Åke Borg, Niklas Loman
PURPOSE: To evaluate a simplified method of pre-test information and germline BRCA1/2 mutation testing. METHODS: In a prospective, single-arm study, comprehensive BRCA1/2 testing was offered to unselected patients with newly diagnosed breast cancer at three hospitals in south Sweden (BRCAsearch, ClinicalTrials.gov Identifier: NCT02557776). Pre-test information was provided by a standardized invitation letter, but the patients could contact a genetic counselor for telephone genetic counseling if they felt a need for that...
November 21, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29162724/progesterone-receptor-a-promotes-invasiveness-and-metastasis-of-luminal-breast-cancer-by-suppressing-regulation-of-critical-micro-rnas-by-estrogen
#6
Thomas McFall, Brooke McKnight, Rayna Rosati, Seongho Kim, Yanfang Huang, Nerissa Viola-Villegas, Manohar Ratnam
Distal metastasis of luminal breast cancer is frequent and incurable, yet the metastasis mechanisms are poorly understood. Estrogen, even at postmenopausal concentrations, suppresses invasiveness of luminal breast cancer cells through the estrogen receptor (ER). Invasive tumors overexpress the short progesterone receptor A (PR-A) isoform. Even at postmenopausal concentrations, progesterone activates PR-A, inducing invasiveness by counteracting estrogens effects, particularly when cells are hyper-sensitized to progesterone by PR-A overexpression...
November 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29159761/nestin-expression-in-breast-cancer-association-with-prognosis-and-subtype-on-3641-cases-with-long-term-follow-up
#7
Karama Asleh, Jennifer R Won, Dongxia Gao, K David Voduc, Torsten O Nielsen
BACKGROUND: Basal-like breast cancers, originally recognized by gene expression profiling, can be clinically identified using immunohistochemical (IHC) definitions that require estrogen receptor (ER) negativity. However, some basal cases are ER positive and are mistakenly considered to be luminal by standard IHC approaches, leading to suboptimal treatment choices. Nestin, an intermediate filament expressed in many stem cells, is a recently identified positive marker of basal-like phenotype independent of ER status...
November 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29159760/body-mass-index-age-at-breast-cancer-diagnosis-and-breast-cancer-subtype-a-cross-sectional-study
#8
O Brouckaert, K Van Asten, A Laenen, A Soubry, A Smeets, I Nevelstreen, I Vergote, H Wildiers, R Paridaens, E Van Limbergen, C Weltens, P Moerman, G Floris, P Neven
PURPOSE: Evidence suggests that premenopausal obesity decreases and postmenopausal obesity increases breast cancer risk. Because it is not well known whether this is subtype dependent, we studied the association between body mass index (BMI) and age at breast cancer diagnosis, or the probability of being diagnosed with a specific breast cancer phenotype, by menopausal status. METHODS: All patients with non-metastatic operable breast cancer from the University Hospital Leuven diagnosed between January 1, 2000 and December 31, 2013 were included (n = 7020) in this cross-sectional study...
November 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/29159269/pulmonary-artery-dysfunction-in-chronic-thromboembolic-pulmonary-hypertension
#9
Hidetoshi Chibana, Nobuhiro Tahara, Naoki Itaya, Takashi Ishimatsu, Masahiro Sasaki, Motoki Sasaki, Takaharu Nakayoshi, Masanori Ohtsuka, Shinji Yokoyama, Ken-Ichiro Sasaki, Takafumi Ueno, Yoshihiro Fukumoto
Background: Unresolved thromboemboli in the pulmonary arteries (PA) is known to cause chronic thromboembolic pulmonary hypertension (CTEPH). However, it remains unknown if vascular dysfunction in pulmonary arteries exists in patients with CTEPH. Methods and results: We enrolled 7 female patients with CTEPH in this study, who have stable pulmonary hemodynamics after balloon pulmonary angioplasty (age; 73.6 ± 3.0 years old, mean right atrial pressure; 4.1 ± 0...
December 2017: IJC Heart & Vasculature
https://www.readbyqxmd.com/read/29158969/5-fluorouracil-and-irinotecan-sn-38-have-limited-impact-on-colon-microbial-functionality-and-composition-in-vitro
#10
Eline Vanlancker, Barbara Vanhoecke, Andrea Stringer, Tom Van de Wiele
Gastrointestinal mucositis is a debilitating side effect of chemotherapy treatment, with currently no treatment available. As changes in microbial composition have been reported upon chemotherapy treatment in vivo, it is thought that gut microbiota dysbiosis contribute to the mucositis etiology. Yet it is not known whether chemotherapeutics directly cause microbial dysbiosis, thereby increasing mucositis risk, or whether the chemotherapeutic subjected host environment disturbs the microbiome thereby aggravating the disease...
2017: PeerJ
https://www.readbyqxmd.com/read/29158965/colour-change-of-twig-mimicking-peppered-moth-larvae-is-a-continuous-reaction-norm-that-increases-camouflage-against-avian-predators
#11
Amy Eacock, Hannah M Rowland, Nicola Edmonds, Ilik J Saccheri
Camouflage, and in particular background-matching, is one of the most common anti-predator strategies observed in nature. Animals can improve their match to the colour/pattern of their surroundings through background selection, and/or by plastic colour change. Colour change can occur rapidly (a few seconds), or it may be slow, taking hours to days. Many studies have explored the cues and mechanisms behind rapid colour change, but there is a considerable lack of information about slow colour change in the context of predation: the cues that initiate it, and the range of phenotypes that are produced...
2017: PeerJ
https://www.readbyqxmd.com/read/29158510/construction-of-developmental-lineage-relationships-in-the-mouse-mammary-gland-by-single-cell-rna-profiling
#12
Bhupinder Pal, Yunshun Chen, François Vaillant, Paul Jamieson, Lavinia Gordon, Anne C Rios, Stephen Wilcox, Naiyang Fu, Kevin He Liu, Felicity C Jackling, Melissa J Davis, Geoffrey J Lindeman, Gordon K Smyth, Jane E Visvader
The mammary epithelium comprises two primary cellular lineages, but the degree of heterogeneity within these compartments and their lineage relationships during development remain an open question. Here we report single-cell RNA profiling of mouse mammary epithelial cells spanning four developmental stages in the post-natal gland. Notably, the epithelium undergoes a large-scale shift in gene expression from a relatively homogeneous basal-like program in pre-puberty to distinct lineage-restricted programs in puberty...
November 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29158490/long-lived-unipotent-blimp1-positive-luminal-stem-cells-drive-mammary-gland-organogenesis-throughout-adult-life
#13
Salah Elias, Marc A Morgan, Elizabeth K Bikoff, Elizabeth J Robertson
The hierarchical relationships between various stem and progenitor cell subpopulations driving mammary gland morphogenesis and homoeostasis are poorly understood. Conditional inactivation experiments previously demonstrated that expression of the zinc finger transcriptional repressor Blimp1/PRDM1 is essential for the establishment of epithelial cell polarity and functional maturation of alveolar cells. Here we exploit a Prdm1.CreERT2-LacZ reporter allele for lineage tracing experiments. Blimp1 expression marks a rare subpopulation of unipotent luminal stem cells that initially appear in the embryonic mammary gland at around E17...
November 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/29155879/subtypes-of-breast-cancer-show-different-spatial-distributions-of-brain-metastases
#14
Sunghyon Kyeong, Yoon Jin Cha, Sung Gwe Ahn, Sang Hyun Suh, Eun Ju Son, Sung Jun Ahn
The aim of our study was to test the hypothesis that the spatial distribution of breast cancer brain metastases (BM) differ according to their biological subtypes. MR images of 100 patients with BM from primary breast cancer were retrospectively reviewed. Patients were divided according to the biological subtype of the primary tumor, (triple-negative: 24, HER2 positive: 48, luminal: 28). All images marked with BMs were standardized to the human brain MRI atlas provided by the Montreal Neurological Institute 152 database...
2017: PloS One
https://www.readbyqxmd.com/read/29155854/profiling-of-proteins-secreted-in-the-bovine-oviduct-reveals-diverse-functions-of-this-luminal-microenvironment
#15
Viju Vijayan Pillai, Darren M Weber, Brett S Phinney, Vimal Selvaraj
The oviductal microenvironment is a site for key events that involve gamete maturation, fertilization and early embryo development. Secretions into the oviductal lumen by either the lining epithelium or by transudation of plasma constituents are known to contain elements conducive for reproductive success. Although previous studies have identified some of these factors involved in reproduction, knowledge of secreted proteins in the oviductal fluid remains rudimentary with limited definition of function even in extensively studied species like cattle...
2017: PloS One
https://www.readbyqxmd.com/read/29155351/erp-responses-greater-for-faces-in-the-temporal-compared-to-the-nasal-visual-field
#16
David Framorando, Nicolas Burra, Mylène Bapst, Alan J Pegna
The distribution of retino-tectal projections is dissimilar depending on whether the receptors are situated in the nasal and temporal visual hemiretinas. Indeed, it has been claimed that the superior colliculus receives a greater proportion of its input from the temporal visual hemifield (nasal hemi-retina) relative to the nasal hemifield (temporal hemi-retina). In order to investigate whether these subcortical projections influence face processing, we investigated the early cortical ERP responses to faces and houses presented in the temporal and nasal retinas using monocular viewing...
November 16, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29155263/identification-and-characterisation-of-the-epididymal-proteins-in-the-lizard-eutropis-carinata-reptilia-squamata-schneider-1801
#17
R Medini, M Bhagya, S Samson
Lizards are seasonal breeders. Cyclic reproductive nature makes lizard as a useful model for the study of the reproductively active protein secretions in the epididymis. During breeding season, the epididymides of the lizard secret proteins that mixes with the spermatozoa and create a favourable environment for sperm maturation. In this spectrum, the aim of this study is to identify and characterize proteins which are present in the lumen of the epididymis of the lizard, E. carinata during the active phase of reproduction...
November 16, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29155081/population-receptive-field-prf-measurements-of-chromatic-responses-in-human-visual-cortex-using-fmri
#18
Lauren E Welbourne, Antony B Morland, Alex R Wade
The spatial sensitivity of the human visual system depends on stimulus color: achromatic gratings can be resolved at relatively high spatial frequencies while sensitivity to isoluminant color contrast tends to be more low-pass. Models of early spatial vision often assume that the receptive field size of pattern-sensitive neurons is correlated with their spatial frequency sensitivity - larger receptive fields are typically associated with lower optimal spatial frequency. A strong prediction of this model is that neurons coding isoluminant chromatic patterns should have, on average, a larger receptive field size than neurons sensitive to achromatic patterns...
November 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/29153866/a-phase-i-trial-of-the-pi3k-inhibitor-buparlisib-combined-with-capecitabine-in-patients-with-metastatic-breast-cancer
#19
Autumn J McRee, Paul K Marcom, Dominic T Moore, William C Zamboni, Zachary A Kornblum, Zhiyuan Hu, Rachel Phipps, Carey K Anders, Katherine Reeder-Hayes, Lisa A Carey, Karen E Weck, Charles M Perou, E Claire Dees
BACKGROUND: Buparlisib is an oral pan-class I phosphotidyinositol-3-kinase (PI3K) inhibitor. The present phase I study evaluated the safety, pharmacokinetics, and efficacy of buparlisib with capecitabine in patients with metastatic breast cancer. PATIENTS AND METHODS: Patients received buparlisib once daily (range, 50 to 100 mg) for 3 weeks with capecitabine twice daily (range, 1000 to 1250 mg/m(2)) for 2 weeks with a 1-week break. Dose escalation used a traditional "3 + 3" design with standard definitions of dose-limiting toxicity (DLT) and maximum tolerated dose...
October 28, 2017: Clinical Breast Cancer
https://www.readbyqxmd.com/read/29152941/the-histopathological-and-stereological-assessment-of-the-effect-of-topically-administered-leptin-on-cerebral-vasospasm-in-an-experimental-subarachnoid-hemorrhage-model
#20
Cem Demirel, Cengiz Çokluk, Abdurrahman Aksoy, Kerameddin Aydın, Mehmet Emin Önger, Enis Kuruoğlu, Abdullah Hilmi Marangoz, Ömür Gülsüm Deniz, Süleyman Kaplan
Background/aim: Cerebral vasospasm is a term that refers to prolonged, slowly progressing but reversible pathological narrowing of cerebral arteries occurring several days after subarachnoid hemorrhage (SAH), usually accompanied by a decrease in perfusion distal to the affected artery. Leptin is an endogenous polypeptide hormone that can be carried freely and bound to protein in the blood. Materials and methods: We investigated the superiority of topical application of leptin that may make a contribution to the development of new treatment modalities for unconscious patients in brain injury intensive care units and its preventive effect, which is considered to have multifactorial pathogenesis on cerebral vasospasm occurring after SAH via stereological studies of the basilar artery...
November 13, 2017: Turkish Journal of Medical Sciences
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