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https://www.readbyqxmd.com/read/28812955/igg-cooperativity-is-there-allostery-implications-for-antibody-functions-and-therapeutic-antibody-development
#1
Danlin Yang, Rachel Kroe-Barrett, Sanjaya Singh, Christopher J Roberts, Thomas M Laue
A central dogma in immunology is that an antibody's in vivo functionality is mediated by two independent events: antigen binding by the variable (V) region, followed by effector activation by the constant (C) region. However, this view has recently been challenged by reports suggesting allostery exists between the two regions, triggered by conformational changes or configurational differences. The possibility of allosteric signals propagating through the IgG domains complicates our understanding of the antibody structure-function relationship, and challenges the current subclass selection process in therapeutic antibody design...
August 16, 2017: MAbs
https://www.readbyqxmd.com/read/28812631/contrasting-effects-of-environment-and-genetics-generate-a-continuum-of-parallel-evolution
#2
Yoel E Stuart, Thor Veen, Jesse N Weber, Dieta Hanson, Mark Ravinet, Brian K Lohman, Cole J Thompson, Tania Tasneem, Andrew Doggett, Rebecca Izen, Newaz Ahmed, Rowan D H Barrett, Andrew P Hendry, Catherine L Peichel, Daniel I Bolnick
Parallel evolution of similar traits by independent populations in similar environments is considered strong evidence for adaptation by natural selection. Often, however, replicate populations in similar environments do not all evolve in the same way, thus deviating from any single, predominant outcome of evolution. This variation might arise from non-adaptive, population-specific effects of genetic drift, gene flow or limited genetic variation. Alternatively, these deviations from parallel evolution might also reflect predictable adaptation to cryptic environmental heterogeneity within discrete habitat categories...
May 22, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812450/sexual-satisfaction-among-older-australian-heterosexual-men-and-women-findings-from-the-sex-age-me-study
#3
Wendy Heywood, Anthony Lyons, Bianca Fileborn, Sharron Hinchliff, Victor Minichiello, Sue Malta, Catherine Barrett, Briony Dow
This study explored sexual satisfaction in older heterosexual Australians using data from a national sample of 1,583 men and women aged 60+ who hoped or planned to have sex in the future. Data collection took place in 2015; participants were recruited using a variety of online and offline advertisements. Less than half the sample (46%) reported they were very or extremely satisfied with their sexual lives. Those who had sex more often and were more interested in sex were more likely to be satisfied, while those who wanted sex more often in the future were less likely to be satisfied, as were men who had experienced sexual difficulties...
August 16, 2017: Journal of Sex & Marital Therapy
https://www.readbyqxmd.com/read/28811707/myo-inositol-reduces-%C3%AE-catenin-activation-in-colitis
#4
Emily M Bradford, Corey A Thompson, Tatiana Goretsky, Guang-Yu Yang, Luz M Rodriguez, Linheng Li, Terrence A Barrett
AIM: To assess dietary myo-inositol in reducing stem cell activation in colitis, and validate pβ-catenin(S552) as a biomarker of recurrent dysplasia. METHODS: We examined the effects of dietary myo-inositol treatment on inflammation, pβ-catenin(S552) and pAkt levels by histology and western blot in IL-10(-/-) and dextran sodium sulfate-treated colitic mice. Additionally, we assessed nuclear pβ-catenin(S552) in patients treated with myo-inositol in a clinical trial, and in patients with and without a history of colitis-induced dysplasia...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28811703/barrett-s-oesophagus-current-controversies
#5
REVIEW
Chidi Amadi, Piers Gatenby
Oesophageal adenocarcinoma is rapidly increasing in Western countries. This tumour frequently presents late in its course with metastatic disease and has a very poor prognosis. Barrett's oesophagus is an acquired condition whereby the native squamous mucosa of the lower oesophagus is replaced by columnar epithelium following prolonged gastro-oesophageal reflux and is the recognised precursor lesion for oesophageal adenocarcinoma. There are multiple national and society guidelines regarding screening, surveillance and management of Barrett's oesophagus, however all are limited regarding a clear evidence base for a well-demonstrated benefit and cost-effectiveness of surveillance, and robust risk stratification for patients to best use resources...
July 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28811388/hill-robertson-interference-reduces-genetic-diversity-on-a-young-plant-y-chromosome
#6
Josh Hough, Wei Wang, Spencer C H Barrett, Stephen I Wright
X and Y chromosomes differ in effective population size (Ne ), rates of recombination, and exposure to natural selection, all of which can affect patterns of genetic diversity. On Y chromosomes with suppressed recombination, natural selection is expected to eliminate linked neutral variation and lower the Ne of Y compared to X chromosomes or autosomes. However, female-biased sex ratios and high variance in male reproductive success can also reduce Y-linked Ne , making it difficult to infer the causes of low Y-diversity...
August 15, 2017: Genetics
https://www.readbyqxmd.com/read/28810157/propagating-the-haze-community-and-professional-perceptions-of-cannabis-cultivation-and-the-impacts-of-prohibition
#7
Helen Beckett Wilson, Stuart Taylor, Giles Barrett, Janet Jamieson, Lauren Grindrod
BACKGROUND: Recent decades have seen substantial changes in the UK cannabis landscape, including increased domestic production, the ascendancy of stronger strains (namely 'skunk') and the drug's reclassification under the 1971 Misuse of Drugs Act. Resultantly, cannabis retains significance in the consciousness, priorities and policy agendas of communities, drug services and criminal justice agencies. METHODS: This paper presents an empirical study, which examined both perceptions and impacts of cannabis cultivation and its control within a North-West English borough...
August 12, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28809740/early-successes-in-an-open-access-provincially-funded-hepatitis-c-treatment-program-in-prince-edward-island
#8
Daniel Smyth, Jordan W Francheville, Robin Rankin, Jeremy Beck, Connie Hoare, Stefanie Materniak, Greg German, Lisa Barrett, Natalie Bunimov-Wall
INTRODUCTION: The availability of curative hepatitis C therapies has created an opportunity to improve delivery and access. Local providers, government, industry, and community groups in Prince Edward Island developed an innovative province-wide care model. Our goal was to describe the first year of program implementation. MATERIAL AND METHODS: Using a community based prospective observational study design, all chronic hepatitis C referrals received from April 2015 to April 2016 were recorded in a database...
August 8, 2017: Annals of Hepatology
https://www.readbyqxmd.com/read/28809383/increasing-symptoms-in-irritable-bowel-symptoms-with-ingestion-of-galacto-oligosaccharides-are-mitigated-by-%C3%AE-galactosidase-treatment
#9
C J Tuck, K M Taylor, P R Gibson, J S Barrett, J G Muir
OBJECTIVES: Galacto-oligosaccharides (GOS) are dietary FODMAPs (fermentable carbohydrates) associated with triggering gastrointestinal symptoms in patients with irritable bowel syndrome (IBS). This randomized, double-blind, placebo-controlled, cross-over trial aimed to assess whether oral α-galactosidase co-ingestion with foods high in GOS and low in other FODMAPs would reduce symptoms. METHODS: Patients meeting the Rome III criteria for IBS who were hydrogen-producers on breath testing were recruited...
August 15, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28807490/fabp1-and-hepar-expression-levels-in-barrett-s-oesophagus-and-associated-neoplasia-in-an-asian-population
#10
Supriya Srivastava, Florian Kern, Neel Sharma, Frank McKeon, Wa Xian, Khay Guan Yeoh, Khek Yu Ho, Ming Teh
INTRODUCTION: Barrett's oesophagus (BE) is a premalignant condition associated with oesophageal adenocarcinoma (EAC). Evidence highlights that EAC is associated with an estimated 5-year survival of approximately 10-15%. Therefore, there is a need to determine which biomarkers are of value in the diagnosis of BE and beyond. The aim of our study was to evaluate the clinical significance of markers known to be expressed across BE and associated neoplasia. METHODS: Retrospective tissues were obtained from columnar lined oesophagus (CLE) without goblet cells (n=22), BE (n=29), dysplasia (n=14), and EAC (n=10)...
July 27, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28807205/facilitating-surgeon-understanding-of-complex-anatomy-using-a-three-dimensional-printed-model
#11
Barrett P Cromeens, William C Ray, Brad Hoehne, Fikir Abayneh, Brent Adler, Gail E Besner
BACKGROUND: 3-dimensional prints (3DP) anecdotally facilitate surgeon understanding of anatomy and decision-making. However, the actual benefit to surgeons or patients has not been quantified. This study investigates how surgeon understanding of complex anatomy is altered by a 3DP compared to computed tomography (CT) scan or CT + digital reconstruction (CT + DR). MATERIALS AND METHODS: Key anatomic features were segmented from a CT-abdomen/pelvis of pygopagus twins to build a DR and printed in color on a 3D printer...
August 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28806368/increased-health-care-utilization-and-costs-among-veterans-with-a-positive-screen-for-military-sexual-trauma
#12
Emily Brignone, Adi V Gundlapalli, Rebecca K Blais, Rachel Kimerling, Tyson S Barrett, Richard E Nelson, Marjorie E Carter, Matthew H Samore, Jamison D Fargo
BACKGROUND: The effects of sexual trauma on long-term health care utilization and costs are not well understood due to infrequent documentation of sexual trauma history in health care systems. The Veteran's Health Administration provides a unique opportunity to address this constraint as sexual trauma is actively screened for as part of routine care. METHODS: We used a retrospective cohort design to analyze Veteran's Health Administration mental health and medical service utilization and costs as a function of a positive screen for exposure to military sexual trauma (MST) among Veterans of recent conflicts in Iraq and Afghanistan...
September 2017: Medical Care
https://www.readbyqxmd.com/read/28805739/four-bad-habits-of-modern-psychologists
#13
James Grice, Paul Barrett, Lisa Cota, Crystal Felix, Zachery Taylor, Samantha Garner, Eliwid Medellin, Adam Vest
Four data sets from studies included in the Reproducibility Project were re-analyzed to demonstrate a number of flawed research practices (i.e., "bad habits") of modern psychology. Three of the four studies were successfully replicated, but re-analysis showed that in one study most of the participants responded in a manner inconsistent with the researchers' theoretical model. In the second study, the replicated effect was shown to be an experimental confound, and in the third study the replicated statistical effect was shown to be entirely trivial...
August 14, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28804243/a-quantitative-systems-pharmacology-platform-to-investigate-the-impact-of-alirocumab-and-cholesterol-lowering-therapies-on-lipid-profiles-and-plaque-characteristics
#14
Jeffrey E Ming, Ruth E Abrams, Derek W Bartlett, Mengdi Tao, Tu Nguyen, Howard Surks, Katherine Kudrycki, Ananth Kadambi, Christina M Friedrich, Nassim Djebli, Britta Goebel, Alex Koszycki, Meera Varshnaya, Joseph Elassal, Poulabi Banerjee, William J Sasiela, Michael J Reed, Jeffrey S Barrett, Karim Azer
Reduction in low-density lipoprotein cholesterol (LDL-C) is associated with decreased risk for cardiovascular disease. Alirocumab, an antibody to proprotein convertase subtilisin/kexin type 9 (PCSK9), significantly reduces LDL-C. Here, we report development of a quantitative systems pharmacology (QSP) model integrating peripheral and liver cholesterol metabolism, as well as PCSK9 function, to examine the mechanisms of action of alirocumab and other lipid-lowering therapies, including statins. The model predicts changes in LDL-C and other lipids that are consistent with effects observed in clinical trials of single or combined treatments of alirocumab and other treatments...
2017: Gene Regulation and Systems Biology
https://www.readbyqxmd.com/read/28803622/effect-of-hyoscine-butylbromide-on-prostate-multiparametric-mri-anatomical-and-functional-image-quality
#15
R A Slough, I Caglic, N L Hansen, A J Patterson, T Barrett
AIM: To evaluate the effect of the spasmolytic agent hyoscine butylbromide (HBB) on the quality of anatomical and functional imaging of the prostate. MATERIALS AND METHODS: One hundred and seventy-three patients were included in this retrospective study. Eighty-seven patients received intravenous HBB prior to scanning (HBB group) and 86 patients did not (non-HBB group). Multiparametric (mp) 3 T magnetic resonance imaging (MRI) was performed using a 32-channel body coil...
August 10, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28803334/surgical-approaches-to-adenocarcinoma-of-the-gastroesophageal-junction-the-siewert-ii-conundrum
#16
REVIEW
Andrew M Brown, Danica N Giugliano, Adam C Berger, Michael J Pucci, Francesco Palazzo
BACKGROUND: The Siewert classification system for gastroesophageal junction adenocarcinoma has provided morphological and topographical information to help guide surgical decision-making. Evidence has shown that Siewert I and III tumors are distinct entities with differing epidemiologic and histologic characteristics and distinct patterns of disease progression, requiring different treatment. Siewert II tumors share some of the characteristics of type I and III lesions, and the surgical approach is not universally agreed upon...
August 12, 2017: Langenbeck's Archives of Surgery
https://www.readbyqxmd.com/read/28802313/aoac-smpr-%C3%A2-2017-010
#17
Prashant Ingle, Brad Barrett, Joseph M Betz, Clyde Don, Nour Eddine Es-Safi, James Griffiths, George Joseph, David C Kennedy, Elizabeth Mudge, Melissa Meaney Phillips, Tom Phillips, Lanette D Richards, Catherine A Rimmer, Brian T Schaneberg, Aniko M Solyom, Darryl M Sullivan, James Traub, Yanjun Zhang, Garrett Zielinski, Scott G Coates
No abstract text is available yet for this article.
July 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28802312/aoac-smpr-%C3%A2-2017-009
#18
Prashant Ingle, Brad Barrett, Joseph M Betz, Clyde Don, Nour Eddine Es-Safi, James Griffiths, George Joseph, David C Kennedy, Elizabeth Mudge, Melissa Meaney Phillips, Tom Phillips, Lanette D Richards, Catherine A Rimmer, Brian T Schaneberg, Aniko M Solyom, Darryl M Sullivan, James Traub, Yanjun Zhang, Garrett Zielinski, Scott G Coates
No abstract text is available yet for this article.
July 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28802311/aoac-smpr-%C3%A2-2015-016
#19
John Austad, Brad Barrett, Joseph M Betz, Carolyn Quarles Burdette, Clyde Don, Andy Erickson, James Griffiths, Jana B Hildreth, Prashant Ingle, Martha Jennens, David Ji, George Joseph, David C Kennedy, Elizabeth Mudge, Matthew Noestheden, Melissa Meaney Phillips, Curtis S Phinney, Mitzi Rettinger, Lanette D Richards, Catherine A Rimmer, Nandakumara Sarma, Berenice Sauza, Brian T Schaneberg, Aniko M Solyom, Darryl M Sullivan, John Szpylka, James Traub, Denise Lowe Walters, J P Woods, Jinchuan Yang, Seong-Jae Yoo, Troy Zhang, Weiguo Zhang, Yanjun Zhang, Joyce Zhu, Garrett Zielinski, Scott G Coates
No abstract text is available yet for this article.
July 1, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28801394/the-role-of-nurse-specialists-in-the-delivery-of-integrated-diabetes-care-a-cross-sectional-survey-of-diabetes-nurse-specialist-services
#20
Fiona Riordan, Sheena M McHugh, Katie Murphy, Julie Barrett, Patricia M Kearney
OBJECTIVES: International evidence suggests the diabetes nurse specialist (DNS) has a key role in supporting integrated management of diabetes. We examine whether hospital and community DNS currently support the integration of care, examine regional variation in aspects of the service relevant to the delivery of integrated care and identify barriers to service delivery and areas for improvement. DESIGN: A cross-sectional survey of hospital and community-based DNS in Ireland...
August 11, 2017: BMJ Open
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