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https://www.readbyqxmd.com/read/28632861/nonreproducibility-of-preclinical-research-reply
#1
John P A Ioannidis
No abstract text is available yet for this article.
June 20, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28625586/corticosteroids-in-neurological-disorders-the-dark-side
#2
REVIEW
Dimitrios Parissis, Styliani-Aggeliki Syntila, Panos Ioannidis
Corticosteroids are among the most commonly prescribed drugs by physicians of nearly all medical specialties. Their widespread use in clinical neurology is based either on randomized studies or, most often, on clinical experience and experts' opinion. Besides the well-known adverse effects of corticosteroids, they may also induce or worsen certain neurological disorders. The purpose of this review is to highlight the negative impact of these drugs on these disorders with emphasis on putative pathophysiological mechanisms of this association...
June 15, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28620378/nature-and-consequences-of-biological-reductionism-for-the-immunological-study-of-infectious-diseases
#3
REVIEW
Ariel L Rivas, Gabriel Leitner, Mark D Jankowski, Almira L Hoogesteijn, Michelle J Iandiorio, Stylianos Chatzipanagiotou, Anastasios Ioannidis, Shlomo E Blum, Renata Piccinini, Athos Antoniades, Jane C Fazio, Yiorgos Apidianakis, Jeanne M Fair, Marc H V Van Regenmortel
Evolution has conserved "economic" systems that perform many functions, faster or better, with less. For example, three to five leukocyte types protect from thousands of pathogens. To achieve so much with so little, biological systems combine their limited elements, creating complex structures. Yet, the prevalent research paradigm is reductionist. Focusing on infectious diseases, reductionist and non-reductionist views are here described. The literature indicates that reductionism is associated with information loss and errors, while non-reductionist operations can extract more information from the same data...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28616156/primary-solitary-peritoneal-tumor-of-the-abdominal-wall-report-of-a-rare-case-and-review-of-the-literature
#4
Christoforos Efthimiadis, Aristeidis Ioannidis, Konstantinia Kofina, Marios Grigoriou
Abdominal wall tumors are sometimes diagnosed as metastases of ovarian cancer, however, primary peritoneal tumors should be taken into consideration in the final diagnosis. A 49-year-old female patient was admitted in our Department for the excision of a pulpable abdominal wall lump, with no other abnormalities shown on imaging investigation. On histology examination, the excised specimen revealed characteristics of metastatic high-grade serous ovarian carcinoma. Total hysterectomy, bilateral oophorectomy, omentectomy and appendectomy were performed...
June 2017: Journal of Surgical Case Reports
https://www.readbyqxmd.com/read/28615061/synergistic-effect-of-il-12-and-il-18-induces-tim3-regulation-of-%C3%AE-%C3%AE-t-cell-function-and-decreases-the-risk-of-clinical-malaria-in-children-living-in-papua-new-guinea
#5
Louis Schofield, Lisa J Ioannidis, Stephan Karl, Leanne J Robinson, Qiao Y Tan, Daniel P Poole, Inoni Betuela, Danika L Hill, Peter M Siba, Diana S Hansen, Ivo Mueller, Emily M Eriksson
BACKGROUND: γδ T cells are important for both protective immunity and immunopathogenesis during malaria infection. However, the immunological processes determining beneficial or detrimental effects on disease outcome remain elusive. The aim of this study was to examine expression and regulatory effect of the inhibitory receptor T-cell immunoglobulin domain and mucin domain 3 (TIM3) on γδ T cells. While TIM3 expression and function on conventional αβ T cells have been clearly defined, the equivalent characterization on γδ T cells and associations with disease outcomes is limited...
June 15, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28611196/atf3-repression-of-bcl-xl-determines-apoptotic-sensitivity-tohdac-inhibitors-across-tumour-types
#6
Anderly C Chüeh, Janson Wt Tse, Michael Dickinson, Paul Ioannidis, Laura Jenkins, Lars Tögel, BeeShin Tan, Ian Luk, Mercedes Dávalos-Salas, Rebecca Nightingale, Matthew R Thompson, Bryan Rg Williams, Guillaume Lessene, Erinna F Lee, Walter D Fairlie, Amardeep S Dhillon, John M Mariadason
Purpose: Histone deacetylase inhibitors (HDACi) are epigenome-targeting small molecules approved for the treatment of cutaneous T cell lymphoma and multiple myeloma. They have also demonstrated clinical activity in AML, non-small cell lung cancer and estrogen receptor-positive breast cancer, and trials are underway assessing their activity in combination regimens including immunotherpy.  However, there is currently no clear strategy to reliably predict HDACi sensitivity. <p>In colon cancer cells, apoptotic sensitivity to HDACi is associated with transcriptional induction of multiple immediate-early (IE) genes...
June 13, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28602848/diabetic-hepatosclerosis-true-clinical-entity-or-ghost-disease
#7
REVIEW
Natalia G Vallianou, Christos Kazazis, George Ioannidis
Diabetic hepatosclerosis is a novel entity that has recently been introduced by reviewing archived liver biopsies as a non-cirrhotic form of peri-sinusoidal fibrosis with basement membrane formation. Diabetic hepatosclerosis is usually characterized by an indolent clinical course. Serum aminotransferase levels are normal or minimally elevated, but elevated alkaline phosphatase levels is usually present. Clinically relevant to DH is the co-existence of other diabetic microvascular complications in the same patient, such as ESRD on long-term dialysis or renal transplantation, retinopathy, or neuropathy...
June 3, 2017: Diabetes & Metabolic Syndrome
https://www.readbyqxmd.com/read/28592419/serum-uric-acid-levels-and-multiple-health-outcomes-umbrella-review-of-evidence-from-observational-studies-randomised-controlled-trials-and-mendelian-randomisation-studies
#8
REVIEW
Xue Li, Xiangrui Meng, Maria Timofeeva, Ioanna Tzoulaki, Konstantinos K Tsilidis, P A Ioannidis, Harry Campbell, Evropi Theodoratou
Objective To map the diverse health outcomes associated with serum uric acid (SUA) levels.Design Umbrella review.Data sources Medline, Embase, Cochrane Database of Systematic Reviews, and screening of citations and references.Eligibility criteria Systematic reviews and meta-analyses of observational studies that examined associations between SUA level and health outcomes, meta-analyses of randomised controlled trials that investigated health outcomes related to SUA lowering treatment, and Mendelian randomisation studies that explored the causal associations of SUA level with health outcomes...
June 7, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28589600/timing-and-characteristics-of-cumulative-evidence-available-on-novel-therapeutic-agents-receiving-food-and-drug-administration-accelerated-approval
#9
Huseyin Naci, Olivier J Wouters, Radhika Gupta, John P A Ioannidis
Policy Points: Randomized trials-the gold standard of evaluating effectiveness-constitute a small minority of existing evidence on agents given accelerated approval. One-third of randomized trials are in therapeutic areas outside of FDA approval and less than half evaluate the therapeutic benefits of these agents but use them instead as common backbone treatments. Agents receiving accelerated approval are often tested concurrently in several therapeutic areas. For most agents, no substantial time lag is apparent between the average start dates of randomized trials evaluating their effectiveness and those using them as part of background therapies...
June 2017: Milbank Quarterly
https://www.readbyqxmd.com/read/28583589/a-comparative-assessment-of-nanocomposites-vs-amorphous-solid-dispersions-prepared-via-nanoextrusion-for-drug-dissolution-enhancement
#10
Meng Li, Nicolas Ioannidis, Costas Gogos, Ecevit Bilgili
Nanoextrusion was used to produce extrudates of griseofulvin, a poorly water-soluble drug, with the objective of examining the impact of drug particle size and polymeric matrix type-size of the extrudates on drug dissolution enhancement. Hydroxypropyl cellulose (HPC) and Soluplus® were used to stabilize wet-milled drug suspensions and form matrices of the extrudates. The wet-milled suspensions along with additional polymer (HPC/Soluplus®) were fed to a co-rotating twin-screw extruder, which dried the suspensions and formed various extrudates...
June 2, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28549038/use-of-smooth-muscle-myosin-heavy-chain-as-an-effective-marker-of-follicular-dendritic-cells
#11
Ioannis Ioannidis, Javier A Laurini
Smooth muscle myosin heavy chain (SMMHC) is a major structural component of the contractile apparatus in smooth muscle cells. Even though it is considered a relatively specific marker for terminal smooth muscle cell differentiation, expression in other cell types such as follicular dendritic cells (FDCs) has rarely been reported. To determine whether SMMHC represents an effective FDC marker in lymphoid tissues, we compared the immunohistochemical results for SMMHC with those of the traditional FDC markers podoplanin (D2-40) and CD21...
May 25, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28532614/evidence-based-medicine-was-bound-to-fail-a-report-to-alvan-feinstein
#12
Giovanni A Fava
John Ioannidis has provided a lucid account, in the form of a report to David Sackett, of how evidence-based medicine (EBM) was hijacked to serve vested interests: major randomized controlled trials are largely done by and for the benefit of the industry; meta-analyses and guidelines are flooded with conflicts of interest; national and federal research funds are unable to address basic clinical questions. Nonetheless, EBM would remain a worthwhile goal. In this paper, in the form of a report to Alvan Feinstein, it is argued that current developments were largely predictable...
April 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28532611/hijacked-evidence-based-medicine-stay-the-course-and-throw-the-pirates-overboard
#13
John P A Ioannidis
The article discusses a number of criticisms that have been raised against evidence-based medicine, such as focusing on benefits and ignoring adverse events; being interested in averages and ignoring the wide variability in individual risks and responsiveness; ignoring clinician-patient interaction and clinical judgement; leading to some sort of reductionism; and falling prey to corruption from conflicts of interest. I argue that none of these deficiencies are necessarily inherent to evidence-based medicine...
April 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28521375/a-genetic-marker-associated-with-shoulder-dislocation
#14
Stuart Kim, John P Kleimeyer, Marwa A Ahmed, Andy L Avins, Michael Fredericson, Jason L Dragoo, John P A Ioannidis
Shoulder dislocations are common shoulder injuries associated with athletic activity in contact sports, such as football, rugby, wrestling, and hockey. Identifying genetic loci associated with shoulder dislocation could shed light on underlying mechanisms for injury and identify predictive genetic markers. To identify DNA polymorphisms associated with shoulder dislocation, a genome-wide association screen was performed using publically available data from the Research Program in Genes, Environment and Health including 662 cases of shoulder dislocation and 82 602 controls from the European ancestry group...
May 18, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28521056/ethnic-minority-status-age-at-immigration-and-psychosis-risk-in-rural-environments-evidence-from-the-sepea-study
#15
James B Kirkbride, Yasir Hameed, Konstantinos Ioannidis, Gayatri Ankireddypalli, Carolyn M Crane, Mukhtar Nasir, Nikolett Kabacs, Antonio Metastasio, Oliver Jenkins, Ashkan Espandian, Styliani Spyridi, Danica Ralevic, Suneetha Siddabattuni, Ben Walden, Adewale Adeoye, Jesus Perez, Peter B Jones
Objective: Several ethnic minority groups experience elevated rates of first-episode psychosis (FEP), but most studies have been conducted in urban settings. We investigated whether incidence varied by ethnicity, generation status, and age-at-immigration in a diverse, mixed rural, and urban setting. Method: We identified 687 people, 16-35 years, with an ICD-10 diagnosis of FEP, presenting to Early Intervention Psychosis services in the East of England over 2 million person-years...
May 17, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28482362/two-genetic-loci-associated-with-medial-collateral-ligament-injury
#16
Andrew K Roos, Andy L Avins, Marwa A Ahmed, John P Kleimeyer, Thomas R Roos, Michael Fredericson, John P A Ioannidis, Jason L Dragoo, Stuart Kim
Medial collateral ligament (MCL) injuries are a common knee injury, especially in competitive athletes. Identifying genetic loci associated with MCL injury could shed light on its etiology. A genome-wide association screen was performed using data from the Research Program in Genes, Environment and Health (RPGEH) including 1 572 cases of MCL injury and 100 931 controls. 2 SNPs (rs80351309 and rs6083471) showed an association with MCL injury at genome-wide significance (p<5×10(-8)) with moderate effects (odds ratios=2...
May 8, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28459974/defending-biomedical-science-in-an-era-of-threatened-funding
#17
John P A Ioannidis
No abstract text is available yet for this article.
May 1, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28445470/the-credibility-crisis-in-research-can-economics-tools-help
#18
Thomas Gall, John P A Ioannidis, Zacharias Maniadis
The issue of nonreplicable evidence has attracted considerable attention across biomedical and other sciences. This concern is accompanied by an increasing interest in reforming research incentives and practices. How to optimally perform these reforms is a scientific problem in itself, and economics has several scientific methods that can help evaluate research reforms. Here, we review these methods and show their potential. Prominent among them are mathematical modeling and laboratory experiments that constitute affordable ways to approximate the effects of policies with wide-ranging implications...
April 2017: PLoS Biology
https://www.readbyqxmd.com/read/28435099/a-meta-analysis-but-not-a-systematic-review-an-evaluation-of-the-global-bmi-mortality-collaboration
#19
Katherine M Flegal, John P A Ioannidis
Meta-analyses of individual participant data (MIPDs) offer many advantages and are considered the highest level of evidence. However, MIPDs can be seriously compromised when they are not solidly founded upon a systematic review. These data-intensive collaborative projects may be led by experts who already have deep knowledge of the literature in the field and of the results of published studies and how these results vary based on different analytical approaches. If investigators tailor the searches, eligibility criteria and analysis plan of the MIPD, they run the risk of reaching foregone conclusions...
April 20, 2017: Journal of Clinical Epidemiology
https://www.readbyqxmd.com/read/28419203/selective-cutoff-reporting-in-studies-of-diagnostic-test-accuracy-a-comparison-of-conventional-and-individual-patient-data-meta-analyses-of-the-patient-health-questionnaire-9-depression-screening-tool
#20
Brooke Levis, Andrea Benedetti, Alexander W Levis, John P A Ioannidis, Ian Shrier, Pim Cuijpers, Simon Gilbody, Lorie A Kloda, Dean McMillan, Scott B Patten, Russell J Steele, Roy C Ziegelstein, Charles H Bombardier, Flavia de Lima Osório, Jesse R Fann, Dwenda Gjerdingen, Femke Lamers, Manote Lotrakul, Sonia R Loureiro, Bernd Löwe, Juwita Shaaban, Lesley Stafford, Henk C P M van Weert, Mary A Whooley, Linda S Williams, Karin A Wittkampf, Albert S Yeung, Brett D Thombs
In studies of diagnostic test accuracy, authors sometimes report results only for a range of cutoff points around data-driven "optimal" cutoffs. We assessed selective cutoff reporting in studies of the diagnostic accuracy of the Patient Health Questionnaire-9 (PHQ-9) depression screening tool. We compared conventional meta-analysis of published results only with individual-patient-data meta-analysis of results derived from all cutoff points, using data from 13 of 16 studies published during 2004-2009 that were included in a published conventional meta-analysis...
May 15, 2017: American Journal of Epidemiology
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