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https://www.readbyqxmd.com/read/28337323/structure-based-design-of-ask1-inhibitors-as-potential-agents-for-heart-failure
#1
Marion Lanier, Jason Pickens, Simone V Bigi, Erica L Bradshaw-Pierce, Alison Chambers, Zacharia S Cheruvallath, Derek Cole, Douglas R Dougan, Jacques Ermolieff, Tony Gibson, Petro Halkowycz, Aki Hirokawa, Anthony Ivetac, Joanne Miura, Evan Nunez, Mark Sabat, John Tyhonas, Haixia Wang, Xiaolun Wang, Steve Swann
Apoptosis signal-regulating kinase 1 (ASK1/MAP3K) is a mitogen-activated protein kinase family member shown to contribute to acute ischemia/reperfusion injury. Using structure-based drug design, deconstruction, and reoptimization of a known ASK1 inhibitor, a lead compound was identified. This compound displayed robust MAP3K pathway inhibition and reduction of infarct size in an isolated perfused heart model of cardiac injury.
March 9, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28325359/immunohistochemistry-in-the-workup-of-prostate-biopsies-frequency-variation-and-appropriateness-of-use-among-pathologists-practicing-at-an-academic-center
#2
Sameer Al Diffalha, Mohanad Shaar, Güliz A Barkan, Eva M Wojcik, Maria M Picken, Stefan E Pambuccian
OBJECTIVES: We studied the frequency, inter-pathologist variation, appropriateness and utility of immunohistochemistry (IHC) performed on prostate biopsies (PB) to determine the significance of foci of suspicious glands/atypical small acinar proliferations (ASAP). METHODS: We calculated the rate of IHC use and diagnostic rate of ASAP and adenocarcinoma in PB from 01/01/2008 to 06/30/2015 for individual pathologists working in a tertiary academic institution, and correlated them with the pathologists' experience, subspecialization and PB volume with the aim of determining the interpathologist variation and appropriateness of use of IHC according to recently published recommendations, and the usefulness of IHC to resolve foci of ASAP as either benign or adenocarcinoma...
April 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28285341/improved-quality-of-risk-reducing-salpingo-oophorectomy-in-australasian-women-at-high-risk-of-pelvic-serous-cancer
#3
Y C Lee, M Bressel, P Grant, P Russell, C Smith, S Picken, S Camm, B E Kiely, R L Milne, S A McLachlan, M Hickey, M L Friedlander, J L Hopper, K A Phillips
OBJECTIVES: The quality of risk-reducing salpingo-oophorectomy (RRSO) performed in Australasian women was previously reported to be suboptimal. Here we describe the quality of RRSO performed since 2008 in women enrolled in the same cohort and determine whether it has improved. DESIGN: Prospective cohort study of women at high risk of pelvic serous cancer (PSC) in kConFab. Eligible women had RRSO between 2008 and 2014 and their RRSO surgical and pathology reports were reviewed...
March 11, 2017: Familial Cancer
https://www.readbyqxmd.com/read/28283725/realistic-phantoms-to-characterize-dosimetry-in-pediatric-ct
#4
Diana E Carver, Susan D Kost, Nicholas D Fraser, W Paul Segars, David R Pickens, Ronald R Price, Michael G Stabin
BACKGROUND: The estimation of organ doses and effective doses for children receiving CT examinations is of high interest. Newer, more realistic anthropomorphic body models can provide information on individual organ doses and improved estimates of effective dose. MATERIALS AND METHODS: Previously developed body models representing 50th-percentile individuals at reference ages (newborn, 1, 5, 10 and 15 years) were modified to represent 10th, 25th, 75th and 90th height percentiles for both genders and an expanded range of ages (3, 8 and 13 years)...
March 10, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28219241/alkyl-cyclens-as-effective-sulfur-and-phosphorus-free-friction-modifiers-for-boundary-lubrication
#5
Michael Desanker, Xingliang He, Jie Lu, Pinzhi Liu, David B Pickens, Massimiliano Delferro, Tobin J Marks, Yip-Wah Chung, Q Jane Wang
Modern automotive engines operate at higher power densities than ever before, driving a need for new lubricant additives capable of reducing friction and wear further than ever before while not poisoning the catalytic converter. Reported in this paper is a new class of molecular friction modifier (FM), represented by 1,4,7,10-tetradodecyl-1,4,7,10-tetraazacyclododecane (1a), designed to employ thermally stable, sulfur- and phosphorus-free alkyl-substituted nitrogen heterocycles with multiple nitrogen centers per molecule...
March 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28192610/salmonella-inactivation-during-extrusion-of-an-oat-flour-model-food
#6
Nathan M Anderson, Susanne E Keller, Niharika Mishra, Shannon Pickens, Dana Gradl, Tim Hartter, Galen Rokey, Christopher Dohl, Brian Plattner, Stuart Chirtel, Elizabeth M Grasso-Kelley
Little research exists on Salmonella inactivation during extrusion processing, yet many outbreaks associated with low water activity foods since 2006 were linked to extruded foods. The aim of this research was to study Salmonella inactivation during extrusion of a model cereal product. Oat flour was inoculated with Salmonella enterica serovar Agona, an outbreak strain isolated from puffed cereals, and processed using a single-screw extruder at a feed rate of 75 kg/h and a screw speed of 500 rpm. Extrudate samples were collected from the barrel outlet in sterile bags and immediately cooled in an ice-water bath...
February 13, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28127894/identification-and-bioactive-potential-of-marine-microorganisms-from-selected-florida-coastal-areas
#7
Anna Christensen, Glenroy D A Martin
The ocean, with its rich untapped chemical biodiversity, continues to serve as a source of potentially new therapeutic agents. The evaluation of the diversity of cultivable microorganisms from the marine sponge Halichondria panicea and ocean sediment samples were examined and their potential as sources of antimicrobial and antiproliferative agents were investigated. The marine sponge and sediments were collected at different depths (0.9-6 meters) and locations in Florida, including Florida Keys, Port St. Joe in Pensacola, Pensacola Bay, Pensacola Beach, and Fort Pickens...
January 26, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28118210/subchronic-anesthetic-ketamine-injections-in-rats-impair-choice-reversal-learning-but-have-no-effect-on-reinforcer-devaluation
#8
Charles L Pickens, Lexia Aurand, Joshua Hunt, Hayley Fisher
Previous exposure to a variety of drugs of abuse has been shown to cause long-term impairments in reversal learning and reinforcer devaluation tasks. However, there is mixed evidence in the literature for a long-term effect of ketamine exposure on reversal learning and the long-term effect of ketamine exposure on devaluation is not known. We determined whether repeated injections of an anesthetic dose of ketamine would lead to impairments in choice reversal learning after discrimination learning or impairments in reinforcer devaluation...
January 21, 2017: Behavioural Pharmacology
https://www.readbyqxmd.com/read/28103759/psychometric-evaluation-of-the-occupation-centered-intervention-assessment
#9
Vanessa Jewell, Noralyn Pickens
A challenge of intervention research is the lack of a means to identify and measure clinical practice from an occupation-centered approach. The objective of this study is to establish basic psychometric properties of the Occupation-Centered Intervention Assessment (OCIA). The study is approached by establishing content validity and utility through expert panel and two focus groups. Interrater reliability (IRR) was determined through standardized video analysis and Krippendorff's alpha. Results from the expert panel and focus groups indicated an overall agreement that the OCIA was able to capture the full range of elements of rehabilitation-focused interventions for older adults (occupational, contextual, and personal relevance) and a good fit with the occupational therapy intervention process model...
January 1, 2017: OTJR: Occupation, Participation and Health
https://www.readbyqxmd.com/read/28088724/the-effect-of-urban-growth-on-landscape-scale-restoration-for-a-fire-dependent%C3%A2-songbird
#10
Bradley A Pickens, Jeffrey F Marcus, John P Carpenter, Scott Anderson, Paul J Taillie, Jaime A Collazo
A landscape-scale perspective on restoration ecology has been advocated, but few studies have informed restoration with landscape metrics or addressed broad-scale threats. Threats such as urban growth may affect restoration effectiveness in a landscape context. Here, we studied longleaf pine savanna in the rapidly urbanizing southeastern United States where a habitat-specialist bird, Bachman's sparrow (Peucaea aestivalis), is closely associated with savanna vegetation structure and frequent fire. Our objectives were to construct a species distribution model for Bachman's sparrow, determine the relationship between fire and urbanization, quantify the urban growth effect (2010-2090), identify potential restoration areas, and determine the interaction between restoration potential and urban growth by 2050...
January 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28047768/th-ab-207a-06-the-use-of-realistic-phantoms-to-predict-ct-dose-to-pediatric-patients
#11
D Carver, S Kost, P Segars, N Fraser, D Pickens, R Price, M Stabin
PURPOSE: To predict pediatric patient dose from diagnostic CT scans using Monte Carlo simulation of realistic reference phantoms of various ages, weights, and heights. METHODS: A series of deformable pediatric reference phantoms using Non-Uniform Rational B-Splines (NURBS) was developed for a large range of ages, percentiles, and reference anatomy. Individual bones were modeled using age-dependent factors, and red marrow was modeled as functions of age and spatial distribution based on Cristy1...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27867337/oligometastatic-growing-teratoma-syndrome-a-case-for-an-aggressive-surgical-approach
#12
William S Gange, Robert H Blackwell, John Biemer, Güliz A Barkan, Maria M Picken, Marcus L Quek
Growing teratoma syndrome is an infrequent presentation of testicular cancer. We present a case of growing teratoma syndrome in a patient who initially presented with clinical stage I nonseminomatous testicular germ cell tumor, who subsequently developed large volume oligometastases to the retroperitoneum, thorax, and thigh. Despite two regimens of chemotherapy, his disease progressed. Complete surgical extirpation of all gross tumors confirmed mature teratoma. An aggressive surgical approach, including postchemotherapy resection of all known metastatic sites, can provide long-term disease-free survival...
October 2016: Current Urology
https://www.readbyqxmd.com/read/27778094/tumor-enucleation-specimens-of-small-renal-tumors-more-frequently-have-a-positive-surgical-margin-than-partial-nephrectomy-specimens-but-this-is-not-associated-with-local-tumor-recurrence
#13
Lu Wang, Ian Hughes, Connor Snarskis, Helyn Alvarez, Jingyang Feng, Gopal N Gupta, Maria M Picken
Approaches to nephron-sparing surgeries (NSS) of renal lesions include partial nephrectomy (PN) and tumor enucleation (TE). Our objective was to examine the pathology of the pseudocapsule and status of the surgical margin in small renal masses treated by NSS and to correlate these findings with the surgical and oncological outcomes. All consecutive renal TE and PN specimens obtained during the period between January 2012 and December 2014, of which clinical follow-up was available, were included in this study...
January 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/27768609/long-chain-%C3%AF-6-plasma-phospholipid-polyunsaturated-fatty-acids-and-association-with-colon-adenomas-in-adult-men-a-cross-sectional-study
#14
Charles A Pickens, Mariana de Fátima Albuquerque Pereira, Jenifer I Fenton
Dietary lipid intake can be associated with an increased risk for colorectal cancer depending on its composition. Carcinogenesis alters lipid metabolism to facilitate cell growth and survival. For instance, metabolites of polyunsaturated fatty acids (PUFAs) are associated with increasing colon cell proliferation. Moreover, precancerous colon lesions (i.e. adenomas) increase the risk for colorectal cancer. In this study, we investigated associations between plasma PUFAs and the number of colon polyps and polyp type (i...
October 20, 2016: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/27757215/brentuximab-vedotin-therapy-for-cutaneous-lesions-in-t-prolymphocytic-leukemia-a-case-report
#15
Jordan Senchak, Peter Pickens
We present an 88-year-old male with simultaneous T-cell prolymphocytic leukemia and stable smoldering myeloma with excellent initial response to three months of alemtuzumab. The patient relapsed at twelve months with severe cutaneous disease. Biopsy of a representative plaque demonstrated CD30 positivity in rare malignant lymphocytes. The patient demonstrated no response to reintroduction with a full course of alemtuzumab. He was therefore treated with brentuximab vedotin, resulting in partial remission of skin involvement that persisted for three months...
September 28, 2016: Hematology Reports
https://www.readbyqxmd.com/read/27751588/development-and-characterization-of-flt3-specific-curcumin-loaded-polymeric-micelles-as-a-drug-delivery-system-for-treating-flt3-overexpressing-leukemic-cells
#16
Singkome Tima, Siriporn Okonogi, Chadarat Ampasavate, Chad Pickens, Cory Berkland, Songyot Anuchapreeda
This study aimed at developing a curcumin (CM) nanoparticle targeted to Feline McDonough Sarcoma (FMS)-like tyrosine kinase 3 (FLT3) protein on the surface of leukemic cells and at evaluating their properties, specificity, cytotoxicity, and inhibitory effect on FLT3 protein level in FLT3-overexpressing leukemic cells, EoL-1, and MV-4-11 cells. FLT3-specific peptides were conjugated onto modified poloxamer 407 using the copper-catalyzed azide-alkyne cycloaddition reaction. The thin film hydration method was performed for FLT3-specific CM-loaded polymeric micelles (FLT3-CM-micelles) preparation...
December 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27711834/discrimination-of-chiral-copper-ii-complexes-upon-binding-of-galactonoamidine-ligands
#17
Susanne Striegler, Jessica B Pickens
The coordination between N-p-methylbenzyl-d-galactonoamidine, a putative transition state analogue of the hydrolyis of glycosidic bonds, and symmetric and chiral binuclear copper(ii) complexes was characterized by spectroscopic titration, isothermal titration calorimetry, circular dichroism spectroscopy, and DFT calculations to elucidate the binding sites in the carbohydrate upon coordination to selected metal complexes. For the formation of metal complex-glyconoamidine assemblies, contributions of the amidine site and of the hydroxyl group at C-2 in the glycon of the amidine are noted...
September 27, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27660063/the-effect-of-me2so-overexposure-during-cryopreservation-on-hos-te85-and-hmsc-viability-growth-and-quality
#18
Timothy J Morris, Andrew Picken, Duncan M C Sharp, Nigel K H Slater, Christopher J Hewitt, Karen Coopman
With the cell therapy industry continuing to grow, the ability to preserve clinical grade cells, including mesenchymal stem cells (MSCs), whilst retaining cell viability and function remains critical for the generation of off-the-shelf therapies. Cryopreservation of MSCs, using slow freezing, is an established process at lab scale. However, the cytotoxicity of cryoprotectants, like Me2SO, raises questions about the impact of prolonged cell exposure to cryoprotectant at temperatures >0 °C during processing of large cell batches for allogenic therapies prior to rapid cooling in a controlled rate freezer or in the clinic prior to administration...
September 20, 2016: Cryobiology
https://www.readbyqxmd.com/read/27635946/tubulocystic-carcinoma-of-the-kidney-with-poorly-differentiated-foci-a-frequent-morphologic-pattern-of-fumarate-hydratase-deficient-renal-cell-carcinoma
#19
Steven C Smith, Kiril Trpkov, Ying-Bei Chen, Rohit Mehra, Deepika Sirohi, Chisato Ohe, Andi K Cani, Daniel H Hovelson, Kei Omata, Jonathan B McHugh, Wolfram Jochum, Maurizio Colecchia, Mitual Amin, Mukul K Divatia, Ondřej Hes, Santosh Menon, Isabela Werneck da Cunha, Sergio Tripodi, Fadi Brimo, Anthony J Gill, Adeboye O Osunkoya, Cristina Magi-Galluzzi, Mathilde Sibony, Sean R Williamson, Gabriella Nesi, Maria M Picken, Fiona Maclean, Abbas Agaimy, Liang Cheng, Jonathan I Epstein, Victor E Reuter, Satish K Tickoo, Scott A Tomlins, Mahul B Amin
An emerging group of high-grade renal cell carcinomas (RCCs), particularly carcinomas arising in the hereditary leiomyomatosis renal cell carcinoma syndrome (HLRCC), show fumarate hydratase (FH) gene mutation and loss of function. On the basis of similar cytomorphology and clinicopathologic features between these tumors and cases described as tubulocystic carcinomas with poorly differentiated foci (TC-PD) of infiltrative adenocarcinoma, we hypothesized a relationship between these entities. First, 29 RCCs with morphology of TC-PD were identified retrospectively and assessed for FH expression and aberrant succination (2SC) by immunohistochemistry (IHC), with targeted next-generation sequencing of 409 genes-including FH-performed on a subset...
November 2016: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27550923/progression-of-chronic-kidney-disease-after-acute-kidney-injury-role-of-self-perpetuating-versus-hemodynamic-induced-fibrosis
#20
Maria Picken, Jianrui Long, Geoffrey A Williamson, Aaron J Polichnowski
The relative contribution of self-perpetuating versus hemodynamic-induced fibrosis to the progression of chronic kidney disease (CKD) after acute kidney injury (AKI) is unclear. In the present study, male Sprague-Dawley rats underwent right uninephrectomy and were instrumented with a blood pressure radiotelemeter. Two weeks later, separate groups of rats were subjected to 40 minutes renal ischemia-reperfusion or sham surgery and followed up for 4 or 16 weeks to determine the extent to which glomerulosclerosis and tubulointerstitial fibrosis as a result of the AKI-CKD transition (ie, at 4 weeks post AKI) change over time during the progression of CKD (ie, at 16 weeks post AKI)...
October 2016: Hypertension
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