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Browse the failure-mode index

21,222 real negative results, null findings, and replication failures. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Negative / Null Result ReportOpen accessMedicine

A year of COVID-19 GWAS results from the GRASP portal reveals potential genetic risk factors

Florian Thibord, Melissa V. Chan, Ming‐Huei Chen et al. · 2022 · Human Genetics and Genomics Advances

Host genetic variants influence the susceptibility and severity of several infectious diseases, and the discovery of genetic associations with coronavirus disease 2019 (COVID-19) phenotypes could help to develop new therapeutic strategies…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

ASSIGN: context-specific genomic profiling of multiple heterogeneous biological pathways

Ying Shen, Mumtahena Rahman, Stephen Piccolo et al. · 2015 · Bioinformatics

MOTIVATION: Although gene-expression signature-based biomarkers are often developed for clinical diagnosis, many promising signatures fail to replicate during validation. One major challenge is that biological samples used to generate and…

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Negative / Null Result ReportMedicine

A Comparison of the Ex-PRESS ™ Mini Glaucoma Shunt With Standard Trabeculectomy in the Surgical Treatment of Glaucoma

Lionel A. Marzette, Leon W. Herndon · 2011 · Ophthalmic surgery, lasers & imaging retina

BACKGROUND AND OBJECTIVE: To compare the success and complication rates of patients with glaucoma who had an Ex-PRESS mini glaucoma shunt device implantation (Optonol, Ltd., Neve Ilan, Israel) to those who had conventional trabeculectomy.…

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Negative / Null Result ReportOpen accessPharmacology, Toxicology and Pharmaceutics

Novel psychoactive substance consumption is more represented in bipolar disorder than in psychotic disorders: A multicenter‐observational study

T. Acciavatti, Matteo Lupi, Rita Santacroce et al. · 2017 · Human Psychopharmacology Clinical and Experimental

OBJECTIVE: Comorbidities between psychiatric diseases and use of traditional substances of abuse are common. Nevertheless, there are few data regarding the use of novel psychoactive substances (NPS) among psychiatric patients. Aim of this…

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Negative / Null Result ReportOpen accessMedicine

A pilot study: effectiveness of local injection of autologous platelet-rich plasma in treating women with stress urinary incontinence

Cheng‐Yu Long, Kun‐Ling Lin, Chin-Ru Shen et al. · 2021 · Scientific Reports

The study aims to evaluate the effectiveness of local injection of autologous platelet rich plasma (A-PRP) as a treatment for women suffering from stress urinary incontinence (SUI). In a prospective intervention study, twenty consecutive women suffering from SUI were treated with A-PRP injection at anterior vaginal wall where mid-urethra locates. Self-reported questionnaires were used to measure pre-treatment, 1 month and 6 months post-treatment symptom severity. Secondary outcomes of sexual function and treatment effect sorted by age were analyzed with valid statistical methods. A-PRP is effe

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Negative / Null Result ReportOpen accessSocial Sciences

Maternal exposure to intimate partner abuse before birth is associated with autism spectrum disorder in offspring

Andrea L. Roberts, Kristen Lyall, Janet W. Rich‐Edwards et al. · 2015 · Autism

We sought to determine whether maternal (a) physical harm from intimate partner abuse during pregnancy or (b) sexual, emotional, or physical abuse before birth increased risk of autism spectrum disorder. We calculated risk ratios for…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Targeted Reactivation of FMR1 Transcription in Fragile X Syndrome Embryonic Stem Cells

Jill M. Haenfler, Geena Skariah, Caitlin M. Rodriguez et al. · 2018 · Frontiers in Molecular Neuroscience

Fragile X Syndrome (FXS) is the most common inherited cause of intellectual disability and autism. It results from expansion of a CGG nucleotide repeat in the 5’ untranslated region of FMR1. Large expansions elicit repeat and promoter hyper-methylation, heterochromatin formation, FMR1 transcriptional silencing, and loss of the Fragile X protein, FMRP. Efforts aimed at correcting the sequelae resultant from FMRP loss have thus far proven insufficient, perhaps because of FMRP’s pleiotropic functions. As the repeats do not disrupt the FMRP coding sequence, reactivation of endogenous FMR1 gene exp

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Negative / Null Result ReportOpen accessMedicine

Incidence and prognostic significance of karyotypic subgroups in older patients with acute myeloid leukemia: the Swedish population-based experience

Vladimir Lazarević, A-S Hörstedt, Bertil Johansson et al. · 2014 · Blood Cancer Journal

The Swedish population-based acute myeloid leukemia registry contains data from 3251 patients (excluding acute promyelocytic leukemia) diagnosed between 1997 and 2006. Informative cytogenetic data from 1893 patients were retrospectively…

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Negative / Null Result ReportOpen accessNeuroscience

Dysregulated brain-gut axis in the setting of traumatic brain injury: review of mechanisms and anti-inflammatory pharmacotherapies

Mahmoud G. El Baassiri, Zachariah Raouf, Sarah Badin et al. · 2024 · Journal of Neuroinflammation

Traumatic brain injury (TBI) is a chronic and debilitating disease, associated with a high risk of psychiatric and neurodegenerative diseases. Despite significant advancements in improving outcomes, the lack of effective treatments underscore the urgent need for innovative therapeutic strategies. The brain-gut axis has emerged as a crucial bidirectional pathway connecting the brain and the gastrointestinal (GI) system through an intricate network of neuronal, hormonal, and immunological pathways. Four main pathways are primarily implicated in this crosstalk, including the systemic immune syste

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Significant association between genes encoding virulence factors with antibiotic resistance and phylogenetic groups in community acquired uropathogenic Escherichia coli isolates

Zahra Yazdanpour, Omid Tadjrobehkar, Motahareh Shahkhah · 2020 · BMC Microbiology

BACKGROUND: Antibiotic resistance is an increasing phenomenon in many bacterial pathogens including uropathogenic Escherichia coli. Hypothetical anti-virulent agents could be a solution, but first clear virulence associated gene-pool of antibiotic resistant isolates have to be determined. The aim of this study is to investigate the significant associations between genes encoding VFs with antibiotic resistance and phylogenetic groups in UPEC isolates. RESULTS: The majority of 248 UPEC isolates belonged to phylogenetic group B2 (67.3%). The maximum and minimum resistance was attributed to amoxic

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Negative / Null Result ReportOpen accessComputer Science

Measurement of Semantic Textual Similarity in Clinical Texts: Comparison of Transformer-Based Models

Xi Yang, Xing He, Hansi Zhang et al. · 2020 · JMIR Medical Informatics

BACKGROUND: Semantic textual similarity (STS) is one of the fundamental tasks in natural language processing (NLP). Many shared tasks and corpora for STS have been organized and curated in the general English domain; however, such resources are limited in the biomedical domain. In 2019, the National NLP Clinical Challenges (n2c2) challenge developed a comprehensive clinical STS dataset and organized a community effort to solicit state-of-the-art solutions for clinical STS. OBJECTIVE: This study presents our transformer-based clinical STS models developed during this challenge as well as new mo

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Predicting male fertility in dairy cattle using markers with large effect and functional annotation data

Juan Pablo Nani, Fernanda Marcondes de Rezende, Francisco Peñagaricano · 2019 · BMC Genomics

BACKGROUND: Fertility is among the most important economic traits in dairy cattle. Genomic prediction for cow fertility has received much attention in the last decade, while bull fertility has been largely overlooked. The goal of this study was to assess genomic prediction of dairy bull fertility using markers with large effect and functional annotation data. Sire conception rate (SCR) was used as a measure of service sire fertility. Dataset consisted of 11.5 k U.S. Holstein bulls with SCR records and about 300 k single nucleotide polymorphism (SNP) markers. The analyses included the use of bo

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Negative / Null Result ReportOpen accessMedicine

A randomised controlled trial (MindChamp) of a mindfulness‐based intervention for children with ADHD and their parents

Nienke M. Siebelink, Susan M. Bögels, Anne Speckens et al. · 2021 · Journal of Child Psychology and Psychiatry

BACKGROUND: Family mindfulness-based intervention (MBI) for child attention-deficit/hyperactivity disorder (ADHD) targets child self-control, parenting and parental mental health, but its effectiveness is still unclear. METHODS: MindChamp…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

AICAR-dependent AMPK activation improves scar formation in the aged heart in a murine model of reperfused myocardial infarction

Katarzyna A. Cieslik, George E. Taffet, Jeffrey R. Crawford et al. · 2013 · Journal of Molecular and Cellular Cardiology

We have demonstrated that scar formation after myocardial infarction (MI) is associated with an endogenous pool of CD44(pos)CD45(neg) multipotential mesenchymal stem cells (MSC). MSC differentiate into fibroblasts secreting collagen that forms a scar and mature into myofibroblasts that express alpha smooth muscle actin (α-SMA) that stabilizes the scar. In the aging mouse, cardiac repair after MI is associated with impaired differentiation of MSC; MSC derived from the aged hearts form dysfunctional fibroblasts that deposit less collagen in response to transforming growth factor beta-1 (TGF-β1)

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Negative / Null Result ReportOpen accessMedicine

MET expression and copy number heterogeneity in nonsquamous non-small cell lung cancer (nsNSCLC)

David Casadevall, Javier Gimeno, Sergi Clavé et al. · 2015 · Oncotarget

// David Casadevall 1, 6, * , Javier Gimeno 2, * , Sergi Clavé 3, 4, * , Álvaro Taus 1 , Lara Pijuan 2 , Miriam Arumí 1 , Marta Lorenzo 4 , Silvia Menéndez 4 , Israel Cañadas 4 , Joan Albanell 1, 4, 5 , Sergio Serrano 2 , Blanca Espinet 3, 4 , Marta Salido 3, 4 , Edurne Arriola 1, 4, # 1 Servei d’Oncologia Mèdica, Hospital del Mar, Barcelona, Spain 2 Servei de Patologia, Hospital del Mar, Barcelona, Spain 3 Laboratori de Citogenètica Molecular, Servei de Patologia, Hospital del Mar, Barcelona, Spain 4 Cancer Research Program, IMIM (Hospita

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

Single‐base methylome profiling of the giant kelp Saccharina japonica reveals significant differences in DNA methylation to microalgae and plants

Xiao Fan, Wentao Han, Linhong Teng et al. · 2019 · New Phytologist

Brown algae have convergently evolved plant-like body plans and reproductive cycles, which in plants are controlled by differential DNA methylation. This contribution provides the first single-base methylome profiles of haploid gametophytes and diploid sporophytes of a multicellular alga. Although only c. 1.4% of cytosines in Saccharina japonica were methylated mainly at CHH sites and characterized by 5-methylcytosine (5mC), there were significant differences between life-cycle stages. DNA methyltransferase 2 (DNMT2), known to efficiently catalyze tRNA methylation, is assumed to methylate the

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Negative / Null Result ReportOpen accessImmunology and Microbiology

Therapeutic Effects of Treatment with Anti-TLR2 and Anti-TLR4 Monoclonal Antibodies in Polymicrobial Sepsis

Cristiano Xavier Lima, Danielle G. Souza, Flávio A. Amaral et al. · 2015 · PLoS ONE

INTRODUCTION: Toll-like receptors (TLRs) play an important role in the recognition of microbial products and in host defense against infection. However, the massive release of inflammatory mediators into the bloodstream following TLR activation following sepsis is thought to contribute to disease pathogenesis. METHODS: Here, we evaluated the effects of preventive or therapeutic administration of monoclonal antibodies (mAbs) targeting either TLR2 or TLR4 in a model of severe polymicrobial sepsis induced by cecal ligation and puncture in mice. RESULTS: Pre-treatment with anti-TLR2 or anti-TLR4 m

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Negative / Null Result ReportOpen accessImmunology and Microbiology

Recruitment of TLR adapter TRIF to TLR4 signaling complex is mediated by the second helical region of TRIF TIR domain

Wenji Piao, Lisa W. Ru, Kurt H. Piepenbrink et al. · 2013 · Proceedings of the National Academy of Sciences

Toll/IL-1R resistance (TIR) domain-containing adapter-inducing IFN-β (TRIF) is a Toll-like receptor (TLR) adapter that mediates MyD88-independent induction of type I interferons through activation of IFN regulatory factor 3 and NFκB. We…

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Negative / Null Result ReportOpen accessBiochemistry, Genetics and Molecular Biology

Analysis of two language-related genes in autism

Claudio Toma, Amaia Hervás, Bàrbara Torrico et al. · 2012 · Psychiatric Genetics

Impairment of language abilities is a common feature in autistic individuals. Heterozygous mutations in the Forkhead Box P2 (FOXP2) gene lead to a severe spoken language disorder. Recently, several studies have pinpointed the involvement…

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Negative / Null Result ReportOpen accessMathematics

Registered Replication Report on Fischer, Castel, Dodd, and Pratt (2003)

Lincoln Colling, Dénes Szűcs, Damiano De Marco et al. · 2020 · Advances in Methods and Practices in Psychological Science

The attentional spatial-numerical association of response codes (Att-SNARC) effect (Fischer, Castel, Dodd, & Pratt, 2003)—the finding that participants are quicker to detect left-side targets when the targets are preceded by small numbers and quicker to detect right-side targets when they are preceded by large numbers—has been used as evidence for embodied number representations and to support strong claims about the link between number and space (e.g., a mental number line). We attempted to replicate Experiment 2 of Fischer et al. by collecting data from 1,105 participants at 17 labs. Acr

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Negative / Null Result ReportOpen accessEconomics, Econometrics and Finance

An Analysis of Factors Affecting the Performance of Insurance Companies in Zimbabwe

Batsirai Winmore Mazviona, T Sakahuhwa, M Dube · 2017 · RePEc: Research Papers in Economics

The study sought to examine factors affecting the performance of insurance companies in Zimbabwe. We utilized secondary data from twenty short-term insurance companies. The data was for the period from 2010 to 2014. We used factor analysis and multiple linear regression models to determine the factors affecting performance and identifying their impact. Our findings revealed that expense ratio, claims ratio and the size of a company significantly affect insurance companies’ performance negatively. Whilst leverage and liquidity affect performance positively. We recommend that insurance companies

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Negative / Null Result ReportOpen accessAgricultural and Biological Sciences

The nsp1, nsp13, and M Proteins Contribute to the Hepatotropism of Murine Coronavirus JHM.WU

Rong Zhang, Yize Li, Timothy J. Cowley et al. · 2015 · Journal of Virology

UNLABELLED: Mouse hepatitis virus (MHV) isolates JHM.WU and JHM.SD promote severe central nervous system disease. However, while JHM.WU replicates robustly and induces hepatitis, JHM.SD fails to replicate or induce pathology in the liver.…

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Negative / Null Result ReportOpen accessMedicine

Health systems performance in sub-Saharan Africa: governance, outcome and equity

Anna Elisabet Olafsdottir, Daniel D. Reidpath, Subhash Pokhrel et al. · 2011 · BMC Public Health

BACKGROUND: The literature on health systems focuses largely on the performance of healthcare systems operationalised around indicators such as hospital beds, maternity care and immunisation coverage. A broader definition of health systems however, needs to include the wider determinants of health including, possibly, governance and its relationship to health and health equity. The aim of this study was to examine the relationship between health systems outcomes and equity, and governance as a part of a process to extend the range of indicators used to assess health systems performance. METHOD

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Negative / Null Result ReportOpen accessMedicine

Nerve growth factor inhibition with tanezumab influences weight-bearing and subsequent cartilage damage in the rat medial meniscal tear model

Timothy P. LaBranche, Alison M. Bendele, Brian C Omura et al. · 2016 · Annals of the Rheumatic Diseases

OBJECTIVE: To investigate whether the effects of nerve growth factor (NGF) inhibition with tanezumab on rats with medial meniscal tear (MMT) effectively model rapidly progressive osteoarthritis (RPOA) observed in clinical trials. METHODS:…

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Negative / Null Result ReportOpen accessBusiness, Management and Accounting

The impact of SME access to finance and performance on exporting behaviour at firm level: A case of furniture manufacturing SMEs in Zimbabwe

Kin Sibanda, Progress Hove-Sibanda, Herring Shava · 2018 · Acta Commercii

Orientation: Globally, the majority of Small and Medium-sized entities (SMEs) are resource constrained. As a result, not all SMEs are able to fully exploit the benefits associated with international trade as they face challenges when exporting their produce.Research purpose: This article presents an investigation into the impact of access to finance on firm performance and exporting behaviour of SMEs in Harare, Zimbabwe.Motivation for the study: The article stems from the observation that although there is a growing importance and contribution of SMEs worldwide, research has shown that only a

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Negative / Null Result ReportOpen accessNeuroscience

No Significant Effect of Prefrontal tDCS on Working Memory Performance in Older Adults

Jonna Nilsson, Alexander V. Lebedev, Martin Lövdén · 2015 · Frontiers in Aging Neuroscience

Transcranial direct current stimulation (tDCS) has been put forward as a non-pharmacological alternative for alleviating cognitive decline in old age. Although results have shown some promise, little is known about the optimal stimulation parameters for modulation in the cognitive domain. In this study, the effects of tDCS over the dorsolateral prefrontal cortex (dlPFC) on working memory performance were investigated in thirty older adults. An N-back task assessed working memory before, during and after anodal tDCS at a current strength of 1 mA and 2 mA, in addition to sham stimulation. The st

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Negative / Null Result ReportOpen accessMedicine

A Phase 2 Trial of the Effect of Antiandrogen Therapy on COVID-19 Outcome: No Evidence of Benefit, Supported by Epidemiology and In Vitro Data

Karin Welén, Ebba Rosendal, Magnus Gisslén et al. · 2021 · European Urology

BACKGROUND: Men are more severely affected by COVID-19. Testosterone may influence SARS-CoV-2 infection and the immune response. OBJECTIVE: To clinically, epidemiologically, and experimentally evaluate the effect of antiandrogens on…

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Negative / Null Result ReportPsychology

How do you feel? Preverbal infants match negative emotions to events.

Ashley L. Ruba, Andrew N. Meltzoff, Betty M. Repacholi · 2019 · Developmental Psychology

There is extensive disagreement as to whether preverbal infants have conceptual categories for different emotions (e.g., anger vs. disgust). In addition, few studies have examined whether infants have conceptual categories of emotions…

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