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https://www.readbyqxmd.com/read/28651172/simultaneous-determination-of-cis-permethrin-and-trans-permethrin-in-rat-plasma-and-brain-tissue-using-gas-chromatography-negative-chemical-ionization-mass-spectrometry
#1
Shirin Hooshfar, Darren R Gullick, Michael R Linzey, Tanzir Mortuza, Mona Hamdy Abdel Rahman, Clinton A Rogers, James V Bruckner, Catherine A White, Michael G Bartlett
A sensitive method for the simultaneous determination of cis-permethrin (cis-PERM) and trans-permethrin (trans-PERM) in small volumes (100μL) of rat plasma and brain homogenate was developed, using a liquid-liquid extraction for sample preparation and gas chromatography-negative chemical ionization mass spectrometry (GCNCI-MS) for detection. Quantitation of trace levels of the insecticide in small volumes of biological samples is essential to support toxicokinetic studies in small animals. There are currently no validated methods in the literature for determining cis-PERM and trans- PERM in volumes as low as 100μL of rat plasma or brain homogenate...
June 13, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28636901/the-effect-of-cd34-cell-telomere-length-and-htert-expression-on-the-outcome-of-autologous-cd34-cell-transplantation-in-patients-with-chronic-heart-failure
#2
Jasmina-Ziva Rozman, Maja Pohar Perme, Mojca Jez, Elvira Malicev, Metka Krasna, Srdjan Novakovic, Bojan Vrtovec, Primoz Rozman
Age-related telomere attrition in stem/progenitor cells may diminish their functional capacity and thereby impair the outcome of cell-based therapies. The aim of the present study was to investigate the effect of CD34(+) cell telomere length and hTERT expression on the clinical outcome of autologous CD34(+) cell transplantation. We studied 43 patients with cardiomyopathy. Their peripheral blood CD34(+) cells were mobilized with granulocyte colony-stimulating factor, enriched by immunoselection and delivered transendocardially...
June 18, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28617512/a-concentration-independent-micro-nanofluidic-active-diode-using-an-asymmetric-ion-concentration-polarization-layer
#3
Hyekyung Lee, Junsuk Kim, Hyeonsoo Kim, Ho-Young Kim, Hyomin Lee, Sung Jae Kim
Over the past decade, nanofluidic diodes that rectify ionic currents (i.e. greater current in one direction than in the opposite direction) have drawn significant attention in biomolecular sensing, switching and energy harvesting devices. To obtain current rectification, conventional nanofluidic diodes have utilized complex nanoscale asymmetry such as nanochannel geometry, surface charge density, and reservoir concentration. Avoiding the use of sophisticated nano-asymmetry, micro/nanofluidic diodes using microscale asymmetry have been recently introduced; however, their diodic performance is still impeded by (i) low (even absent) rectification effects at physiological concentrations over 100 mM and strong dependency on the bulk concentration, and (ii) the fact that they possess only passive predefined rectification factors...
June 15, 2017: Nanoscale
https://www.readbyqxmd.com/read/28613929/dna-methylation-and-hydroxymethylation-profile-of-cd34-enriched-cell-products-intended-for-autologous-cd34-cell-transplantation
#4
Jasmina-Ziva Rozman, Maja Pohar Perme, Mojca Jez, Elvira Malicev, Metka Krasna, Bojan Vrtovec, Primoz Rozman
Epigenetic dysregulation has been shown to limit functional capacity of aging hematopoietic stem cells, which may contribute to impaired outcome of hematopoietic stem cell-based therapies. The aim of our study was to gain better insight into the epigenetic profile of CD34(+)-enriched cell products intended for autologous CD34(+) cell transplantation in patients with cardiomyopathy. We found global DNA methylation content significantly higher in immunoselected CD34(+) cells compared to leukocytes in leukapheresis products (2...
June 14, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28611680/mono-heteromeric-configurations-of-gap-junction-channels-formed-by-connexin43-and-connexin45-reduce-unitary-conductance-and-determine-both-voltage-gating-and-metabolic-flux-asymmetry
#5
Guoqiang Zhong, Nazem Akoum, Daniel A Appadurai, Volodya Hayrapetyan, Osman Ahmed, Agustin D Martinez, Eric C Beyer, Alonso P Moreno
In cardiac tissues, the expression of multiple connexins (Cx40, Cx43, Cx45, and Cx30.2) is a requirement for proper development and function. Gap junctions formed by these connexins have distinct permeability and gating mechanisms. Since a single cell can express more than one connexin isoform, the formation of hetero-multimeric gap junction channels provides a tissue with an enormous repertoire of combinations to modulate intercellular communication. To study further the perm-selectivity and gating properties of channels containing Cx43 and Cx45, we studied two monoheteromeric combinations in which a HeLa cell co-transfected with Cx43 and Cx45 was paired with a cell expressing only one of these connexins...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28598889/survival-of-solid-cancer-patients-in-france-1989-2013-a-population-based-study
#6
Anne Cowppli-Bony, Zoé Uhry, Laurent Remontet, Nicolas Voirin, Anne-Valérie Guizard, Brigitte Trétarre, Anne-Marie Bouvier, Marc Colonna, Nadine Bossard, Anne-Sophie Woronoff, Pascale Grosclaude
This study provides updates of net survival (NS) estimates at 5, 10, and 15 years as well as survival trends for 35 solid cancers in France using data from 19 population-based cancer registries. The study considered all cases of solid cancer diagnosed between 1989 and 2010 in patients older than 15 years of age who were actively followed up until 30 June 2013. NS was estimated using the Pohar-Perme method. The age-standardized NS used the international cancer survival standard weights. The 5-year age-standardized NSs ranged from 4% (pleural mesothelioma) to 93% (prostate) in men and from 10% (pancreas) to 97% (thyroid) in women...
June 8, 2017: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/28590274/survival-from-cancer-in-the-north-region-of-portugal-results-from-the-first-decade-of-the-millennium
#7
Luís Antunes, Lúcio L Santos, Maria José Bento
The aim of this study was to evaluate net survival from cancer diagnosed during the period 2001/2010 in the north region of Portugal to identify the tumours that need actions to improve the outcomes. Data were retrieved from the North Region Cancer Registry of Portugal database. The top 20 cancer sites in adults were considered: oesophagus, stomach, colon, rectum, pancreas, liver, larynx, lung, skin melanoma, breast, cervix, corpus uteri, ovary, prostate, kidney, bladder, brain and central nervous system, thyroid, non-Hodgkin lymphoma and multiple myeloma...
June 5, 2017: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/28464839/on-comparison-of-net-survival-curves
#8
Klemen Pavlič, Maja Pohar Perme
BACKGROUND: Relative survival analysis is a subfield of survival analysis where competing risks data are observed, but the causes of death are unknown. A first step in the analysis of such data is usually the estimation of a net survival curve, possibly followed by regression modelling. Recently, a log-rank type test for comparison of net survival curves has been introduced and the goal of this paper is to explore its properties and put this methodological advance into the context of the field...
May 2, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28425114/a-multi-institutional-joint-study-of-contact-dermatitis-related-to-hair-colouring-and-perming-agents-in-japan
#9
Akiko Ito, Kazue Nishioka, Hiromi Kanto, Akiko Yagami, Shigeki Yamada, Mariko Sugiura, Chihiro Yasunaga, Keiko Yoshii, Hiromi Kobayashi, Atsuko Adachi, Yuko Ikezawa, Kumiko Washizaki, Shigeki Inui, Hitoshi Miyazawa, Naoki Oiso, Tokio Nakata, Kayoko Matsunaga
BACKGROUND: In Japan, allergic contact dermatitis caused by hair colouring agents is a considerable problem for those occupationally exposed and also for consumers. Over the last 20 years, p-phenylenediamine (PPD) has been a common allergen, with ∼7% positive patch test reactions. OBJECTIVES: To investigate which ingredients caused allergic contact dermatitis related to hair dye and perming solutions in Japan, to assess whether PPD is suitable for screening for hair dye allergy, and to propose allergens for a Japanese hairdresser series...
April 20, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28396898/-allergic-contact-dermatitis-of-the-scalp
#10
REVIEW
L Koch, W Aberer
Contact allergy represents an important differential diagnosis to other skin diseases of the scalp. The typical efflorescences, spreading in the periphery, pruritus, and the clinical history support the differential diagnosis. Since the scalp is particularly resistant to contact dermatitis, allergens applied to this area often produce dermatitis of the eyelids, ears and neck. Nevertheless, potent allergens such as para-phenylendiamine can also cause severe reactions of the scalp. The most important allergens eliciting contact allergy of the scalp are found in bleaches and dyes, shampoos and conditioners, products for perm waves and straighteners as well as topical drugs...
April 10, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28352055/progressive-encephalomyelitis-with-rigidity-and-myoclonus-in-an-intellectually-disabled-patient-mimicking-neuroleptic-malignant-syndrome
#11
Zheyu Xu, Kalpana Prasad, Tianrong Yeo
We present a case of 32-year-old male with profound mental retardation and autism spectrum disorder who had presented with seizures, rigidity and elevated creatine kinase and was initially diagnosed as neuroleptic malignant syndrome (NMS). The patient subsequently had a complicated clinical course, developing refractory status epilepticus, which lead to the eventual diagnosis of progressive encephalomyelitis with rigidity and myoclonus (PERM). We discuss the clinical similarities and differences between NMS and PERM, and highlight the need to consider alternative diagnoses when the clinical picture of NMS is atypical, particularly in this patient group where the history and clinical examination may be challenging...
May 2017: Journal of Movement Disorders
https://www.readbyqxmd.com/read/28335677/comparison-of-anti-pertussis-toxin-elisa-and-agglutination-assays-to-assess-immune-responses-to-pertussis
#12
Pavel Khramtsov, Maria Bochkova, Valeria Timganova, Svetlana Zamorina, Mikhail Rayev
BACKGROUND: The goal of our study was to compare the following two methods of assessment of pertussis post-vaccination immunity: bacterial agglutination test and pertussis toxin enzyme-linked immunosorbent assay (ELISA). METHODS: The study was carried out in Perm Region, Russia. We measured pertussis immunity using two serological methods: ELISA of IgG to pertussis toxin (PT) and the agglutination test (AT) among 135 children, in the age range from 2 months to 17 years old...
March 23, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28330426/comment-on-pleural-plaques-and-lung-function-in-the-marysville-worker-cohort-a-re-analysis-by-zu-et%C3%A2-al-2016
#13
James E Lockey, Kari Dunning, Timothy J Hilbert, Eric Borton, Linda Levin, Carol H Rice, Roy T McKay, Ralph Shipley, Cristopher A Meyer, Charles Perme, Grace K LeMasters
No abstract text is available yet for this article.
February 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/28315607/correcting-bias-due-to-missing-stage-data-in-the-non-parametric-estimation-of-stage-specific-net-survival-for-colorectal-cancer-using-multiple-imputation
#14
Milena Falcaro, James R Carpenter
BACKGROUND: Population-based net survival by tumour stage at diagnosis is a key measure in cancer surveillance. Unfortunately, data on tumour stage are often missing for a non-negligible proportion of patients and the mechanism giving rise to the missingness is usually anything but completely at random. In this setting, restricting analysis to the subset of complete records gives typically biased results. Multiple imputation is a promising practical approach to the issues raised by the missing data, but its use in conjunction with the Pohar-Perme method for estimating net survival has not been formally evaluated...
March 15, 2017: Cancer Epidemiology
https://www.readbyqxmd.com/read/28306573/redefining-progressive-encephalomyelitis-with-rigidity-and-myoclonus-after-the-discovery-of-antibodies-to-glycine-receptors
#15
Sarah J Crisp, Bettina Balint, Angela Vincent
PURPOSE OF REVIEW: This review highlights the recent discovery of antibodies to glycine receptor (GlyR-Ab) and discusses the relationship between these antibodies and neurological disorders. RECENT FINDINGS: Since the initial description in 2008 of antibodies to glycine receptors (GlyR-Abs) in a patient with progressive encephalomyelitis with rigidity and myoclonus (PERM), these antibodies have been found in PERM and in some patients with a variety of stiff person spectrum (SPS) or related disorders...
June 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28297899/wall-depletion-length-of-a-channel-confined-polymer
#16
Guo Kang Cheong, Xiaolan Li, Kevin D Dorfman
Numerous experiments have taken advantage of DNA as a model system to test theories for a channel-confined polymer. A tacit assumption in analyzing these data is the existence of a well-defined depletion length characterizing DNA-wall interactions such that the experimental system (a polyelectrolyte in a channel with charged walls) can be mapped to the theoretical model (a neutral polymer with hard walls). We test this assumption using pruned-enriched Rosenbluth method (PERM) simulations of a DNA-like semiflexible polymer confined in a tube...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28265236/long-term-outcomes-of-high-dose-treatment-and-autologous-stem-cell-transplantation-in-follicular-and-mantle-cell-lymphomas-a-single-centre-experience
#17
Lucka Boltezar, Karlo Pintaric, Jože Pretnar, Maja Pohar Perme, Barbara Jezersek Novakovic
BACKGROUND: Advanced follicular lymphoma (FL) and mantle cell lymphoma (MCL) are incurable diseases with conventional treatment. The high dose treatment (HDT) with autologous stem cell transplantation (ASCT), however, offers a certain proportion of these patients the prospect of a prolonged disease-free and overall survival. The aim of this study was to investigate the event free survival (EFS) and overall survival (OS) in patients with FL and MCL treated with ASCT. PATIENTS AND METHODS: Seventeen patients with FL and 29 patients with MCL were included, 15 of them were transplanted to consolidate the response to second line treatment and 24 to consolidate their first remission, respectively...
March 1, 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/28237245/the-formation-of-quiescent-glomerular-endothelial-cell-monolayer-in-vitro-is-strongly-dependent-on-the-choice-of-extracellular-matrix-coating
#18
Kamilla Pajęcka, Malik Nygaard Nielsen, Troels Krarup Hansen, Julie M Williams
BACKGROUND AND AIMS: Nephropathy involves pathophysiological changes to the glomerulus. The primary glomerular endothelial cells (GEnCs) have emerged as an important tool for studying glomerulosclerotic mechanisms and in the screening process for drug-candidates. The success of the studies is dependent on the quality of the cell model. Therefore, we set out to establish an easy, reproducible model of the quiescent endothelial monolayer with the use of commercially available extracellular matrices (ECMs)...
April 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28212879/flow-cytometric-based-protocols-for-assessing-anti-mt-2-igg1-reactivity-high-dimensional-data-handling-to-define-predictors-for-clinical-follow-up-of-human-t-cell-leukemia-virus-type-1-infection
#19
Jordana Grazziela Coelho-Dos-Reis, Vanessa Peruhype-Magalhães, Marcelo Antônio Pascoal-Xavier, Matheus de Souza Gomes, Laurence Rodrigues do Amaral, Ludmila Melo Cardoso, Juan Jonathan-Gonçalves, Ágata Lopes Ribeiro, Ana Lúcia Borges Starling, João Gabriel Ribas, Denise Utsch Gonçalves, Anna Bárbara de Freitas Carneiro-Proietti, Andréa Teixeira-Carvalho, Olindo Assis Martins-Filho
The present work provides an innovative methodological approach to assess the anti-HTLV-1 IgG1 reactivity with practical application in clinical laboratory. Serum from non-infected healthy controls (NI) and HTLV-1-infected patients, categorized as asymptomatic (AS), putatively progressing to HTLV-1 associated myelopathy/tropical spastic paraparesis - HAM/TSP (pHAM) or with clinical diagnosis of HAM/TSP (HT) were assayed in two-parallel flow cytometry platforms, referred as: Fix and Fix&Perm protocols. Operating-characteristics analysis indicated that a single pair of attributes ("serum dilution/cut-off") for Fix and Fix&Perm protocols presented excellent performance for the diagnosis of HTLV-1 infection...
February 16, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28162709/-458-using-a-perioperative-enhanced-recovery-care-pathway-for-major-spine-surgery-perms-to-improve-pain-management-patient-reported-outcomes
#20
A Dagal, I Lesnik, N Bentov, J Dong, Q Qiu, K Hayes, D Gordon
No abstract text is available yet for this article.
April 2016: Journal of Pain: Official Journal of the American Pain Society
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