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11,291 real negative results, null findings, and replication failures in Medicine · Negative / Null Result Report. 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

Obese Rats Exhibit High Levels of Fat Necrosis and Isoprostanes in Taurocholate-Induced Acute Pancreatitis

Javier Pereda, Salvador Pérez, Javier Escobar et al. · 2012 · PLoS ONE

BACKGROUND: Obesity is a prognostic factor for severity in acute pancreatitis in humans. Our aim was to assess the role of oxidative stress and abdominal fat in the increased severity of acute pancreatitis in obese rats. METHODOLOGY: Taurocholate-induced acute pancreatitis was performed in lean and obese Zucker rats. Levels of reduced glutathione, oxidized glutathione, L-cysteine, cystine, and S-adenosylmethionine were measured in pancreas as well as the activities of serine/threonine protein phosphatases PP1 and PP2A and tyrosin phosphatases. Isoprostane, malondialdehyde, triglyceride, and fr

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Negative / Null Result ReportOpen accessMedicine

Individualized Surgical Approach Planning for Petroclival Tumors Using a 3D Printer

Thomas Muelleman, Jeremy Peterson, Naweed I. Chowdhury et al. · 2015 · Journal of Neurological Surgery Part B Skull Base

Objectives To determine the utility of three-dimensional (3D) printed models in individualized petroclival tumor resection planning by measuring the fidelity of printed anatomical structures and comparing tumor exposure afforded by…

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Negative / Null Result ReportOpen accessMedicine

Clinical outcomes of patients with corticosteroid refractory immune checkpoint inhibitor-induced enterocolitis treated with infliximab

James L. Alexander, Hajir Ibraheim, Bhavisha P. Sheth et al. · 2021 · Journal for ImmunoTherapy of Cancer

INTRODUCTION: Immune checkpoint inhibitors (CPIs) have changed the treatment landscape for many cancers, but also cause severe inflammatory side effects including enterocolitis. CPI-induced enterocolitis is treated empirically with corticosteroids, and infliximab (IFX) is used in corticosteroid-refractory cases. However, robust outcome data for these patients are scarce. METHODS: We conducted a multicenter (six cancer centers), cohort study of outcomes in patients treated with IFX for corticosteroid-refractory CPI-induced enterocolitis between 2007 and 2020. The primary outcome was corticoster

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Negative / Null Result ReportOpen accessMedicine

A Phase 2 clinical trial of PF-05212377 (SAM-760) in subjects with mild to moderate Alzheimer’s disease with existing neuropsychiatric symptoms on a stable daily dose of donepezil

Terence Fullerton, Brendon Binneman, William David et al. · 2018 · Alzheimer s Research & Therapy

Symptomatic benefits have been reported for 5-HT6 receptor antagonists in Alzheimer’s disease (AD) trials. SAM-760 is a potent and selective 5-HT6 receptor antagonist that has demonstrated central 5-HT6 receptor saturation in humans at a dose of 30 mg. This was a randomized, double-blind, placebo-controlled, parallel-group, multicenter trial evaluating the efficacy and safety of SAM-760 30 mg once daily (QD) for 12 weeks in subjects with AD on a stable regimen of donepezil 5 to 10 mg QD. The study included an interim analysis with stopping rules for futility or efficacy after 180 subjects comp

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Negative / Null Result ReportOpen accessMedicine

Evaluation of outcome and prognostic factors in patients of glioblastoma multiforme: A single institution experience

Narendra Kumar, Pankaj Kumar, Shabab Angurana et al. · 2013 · Journal of Neurosciences in Rural Practice

AIMS: We present retrospective analysis of patients of glioblastoma multiforme (GBM) and discuss clinical characteristics, various treatment protocols, survival outcomes, and prognostic factors influencing survival. MATERIALS AND METHODS:…

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Negative / Null Result ReportOpen accessMedicine

Significant differences when using creatinine, modification of diet in renal disease, or cystatin C for estimating glomerular filtration rate in ICU patients

Miklós Lipcsey, Mia Furebring, Sten Rubertsson et al. · 2010 · Upsala Journal of Medical Sciences

BACKGROUND: Renal dysfunction is associated with increased morbidity and mortality in intensive care patients. In most cases the glomerular filtration rate (GFR) is estimated based on serum creatinine and the Modification of Diet in Renal Disease (MDRD) formula, but cystatin C-estimated GFR is being used increasingly. The aim of this study was to compare creatinine and MDRD and cystatin C-estimated GFR in intensive care patients. METHODS: Retrospective observational study was performed, on patients treated within the general intensive care unit (ICU) during 2004-2006, in a Swedish university h

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Negative / Null Result ReportOpen accessMedicine

Evaluation of a Computer-Tailored Healthy Ageing Intervention to Promote Physical Activity among Single Older Adults with a Chronic Disease

Janet M. Boekhout, Brenda Berendsen, Denise A. Peels et al. · 2018 · International Journal of Environmental Research and Public Health

This study explores the effectiveness of the Active Plus65 intervention designed to stimulate physical activity among single older adults with a chronic physical impairment. A quasi-experimental pre-test post-test study was performed. The intervention group (n = 411; mean age = 76.75; SD = 7.75) was assessed at baseline, three months, and six months. Data of comparable older adults who completed the original Active Plus intervention served as reference group (n = 87; mean age = 74.36; SD = 6.26). Multilevel regression analyses were applied: outcome measures were weekly minutes of moderate to v

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Negative / Null Result ReportOpen accessMedicine

The use of a proposed updated EARL harmonization of 18F-FDG PET-CT in patients with lymphoma yields significant differences in Deauville score compared with current EARL recommendations

John Ly, David Minarik, Lars Edenbrandt et al. · 2019 · EJNMMI Research

The Deauville score (DS) is a clinical tool, based on the comparison between lesion and reference organ uptake of 18F-fluorodeoxyglucose (FDG), used to stratify patients with lymphoma into categories reflecting their disease status. With a plethora of positron emission tomography with computed tomography (PET-CT) hard- and software algorithms, standard uptake value (SUV) in lesions and reference organs may differ which affects DS classification and therefore medical treatment. The EANM Research Ltd. (EARL) harmonization program from the European Association of Nuclear Medicine (EANM) partly mi

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Negative / Null Result ReportOpen accessMedicine

Family-Based Association Analysis of Alcohol Dependence Criteria and Severity

Leah Wetherill, Manav Kapoor, Arpana Agrawal et al. · 2013 · Alcoholism Clinical and Experimental Research

BACKGROUND: Despite the high heritability of alcohol dependence (AD), the genes found to be associated with it account for only a small proportion of its total variability. The goal of this study was to identify and analyze phenotypes…

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Negative / Null Result ReportOpen accessMedicine

Prognostic factors of BRAF V600E colorectal cancer with liver metastases: a retrospective multicentric study

Sahir Javed, Stéphane Benoist, Patrick Devos et al. · 2022 · World Journal of Surgical Oncology

BACKGROUND: BRAF V600E-mutant colorectal cancers (CRCs) are associated with shorter survival than BRAF wild-type tumors. Therapeutic decision-making for colorectal liver metastases (CRLM) harboring this mutation remains difficult due to the scarce literature. The aim was to study a large cohort of BRAF V600E-mutant CRLM patients in order to see if surgery extend overall survival among others prognostic factors. METHODS: BRAF V600E-mutant CRCs diagnosed with liver-only metastases, resected or not, were retrospectively identified between April 2008 and December 2017, in 25 French centers. Clinic

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Negative / Null Result ReportOpen accessMedicine

Ultrasound guidance for femoral venous access in patients undergoing pulmonary vein isolation: A quasi‐randomized study

Péter Kupó, T Riesz, László Sághy et al. · 2023 · Journal of Cardiovascular Electrophysiology

INTRODUCTION: Routine ultrasound (US) guidance for femoral venous access to decrease vascular complications of atrial fibrillation (AF) ablation procedures has been advocated. However, the benefit has not been unequivocally demonstrated by randomized-trial data. METHODS: Consecutive patients undergoing pulmonary vein isolation (PVI) on uninterrupted anticoagulant treatment were included. A quasi-random allocation to either US-guided or conventional puncture group was based on which of the two procedure rooms the patient was scheduled in, with only one of the rooms equipped with a US machine in

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Negative / Null Result ReportOpen accessMedicine

Centromedian Nucleus of the Thalamus Deep Brain Stimulation for Genetic Generalized Epilepsy: A Case Report and Review of Literature

Shruti Agashe, David B. Burkholder, Keith Starnes et al. · 2022 · Frontiers in Human Neuroscience

There is a paucity of treatment options for cognitively normal individuals with drug resistant genetic generalized epilepsy (GGE). Centromedian nucleus of the thalamus (CM) deep brain stimulation (DBS) may be a viable treatment for GGE. Here, we present the case of a 27-year-old cognitively normal woman with drug resistant GGE, with childhood onset. Seizure semiology are absence seizures and generalized onset tonic clonic (GTC) seizures. At baseline she had 4-8 GTC seizures per month and weekly absence seizures despite three antiseizure medications and vagus nerve stimulation. A multidisciplin

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Negative / Null Result ReportMedicine

Particulate ECM biomaterial ink is 3D printed and naturally crosslinked to form structurally-layered and lubricated cartilage tissue mimics

Jeanne E. Barthold, Kaitlin P. McCreery, Jaylene Martinez et al. · 2022 · Biofabrication

Abstract Articular cartilage is a layered tissue with a complex, heterogeneous structure and lubricated surface which is challenging to reproduce using traditional tissue engineering methods. Three-dimensional printing techniques have…

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Negative / Null Result ReportMedicine

Significant association between TNFAIP3 inactivation and biased immunoglobulin heavy chain variable region 4‐34 usage in mucosa‐associated lymphoid tissue lymphoma

Sarah Moody, Leire Escudero‐Ibarz, Ming Wang et al. · 2017 · The Journal of Pathology

Both antigenic drive and genetic change play critical roles in the development of mucosa-associated lymphoid tissue (MALT) lymphoma, but neither alone is sufficient for malignant transformation, and lymphoma development critically depends…

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Negative / Null Result ReportOpen accessMedicine

Tetrahydrobiopterin Protects Against Hypertrophic Heart Disease Independent of Myocardial Nitric Oxide Synthase Coupling

Toru Hashimoto, Vidhya Sivakumaran, Ricardo Carnicer et al. · 2016 · Journal of the American Heart Association

BACKGROUND: Nitric oxide synthase uncoupling occurs under conditions of oxidative stress modifying the enzyme's function so it generates superoxide rather than nitric oxide. Nitric oxide synthase uncoupling occurs with chronic pressure…

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Negative / Null Result ReportOpen accessMedicine

Tumor regression mediated by oncogene withdrawal or erlotinib stimulates infiltration of inflammatory immune cells in EGFR mutant lung tumors

Deborah Ayeni, Braden Miller, Alexandra Kuhlmann et al. · 2019 · Journal for ImmunoTherapy of Cancer

BACKGROUND: Epidermal Growth Factor Receptor (EGFR) tyrosine kinase inhibitors (TKIs) like erlotinib are effective for treating patients with EGFR mutant lung cancer; however, drug resistance inevitably emerges. Approaches to combine immunotherapies and targeted therapies to overcome or delay drug resistance have been hindered by limited knowledge of the effect of erlotinib on tumor-infiltrating immune cells. METHODS: Using mouse models, we studied the immunological profile of mutant EGFR-driven lung tumors before and after erlotinib treatment. RESULTS: We found that erlotinib triggered the re

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Negative / Null Result ReportOpen accessMedicine

Stepwise dual antiplatelet therapy de-escalation in patients after drug coated balloon angioplasty (REC-CAGEFREE II): multicentre, randomised, open label, assessor blind, non-inferiority trial

Chao Gao, Bin Zhu, Fan Ouyang et al. · 2025 · BMJ

Abstract Objectives To investigate whether a less intense antiplatelet regimen could be used for people receiving drug coated balloons. Design Multicentre, randomised, open label, assessor blind, non-inferiority trial (REC-CAGEFREE II).…

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Negative / Null Result ReportOpen accessMedicine

Early venous thromboembolism at the beginning of palliative chemotherapy is a poor prognostic factor in patients with metastatic pancreatic cancer: a retrospective study

Jung Sun Kim, Eun Joo Kang, Dae Sik Kim et al. · 2018 · BMC Cancer

BACKGROUND: This study investigated the prognostic effects of venous thromboembolism (VTE)-related factors in patients with metastatic pancreatic cancer receiving palliative chemotherapy. Predictive factors for VTE were also investigated. METHODS: A total of 216 patients diagnosed with metastatic pancreatic cancer who received gemcitabine-based palliative chemotherapy at our institution were retrospectively evaluated. RESULTS: VTE occurred in 51 (23.6%) patients during treatment and did not affect survival. However, patients who were diagnosed with VTE at the beginning of chemotherapy showed p

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Negative / Null Result ReportOpen accessMedicine

African Green Monkeys Recapitulate the Clinical Experience with Replication of Live Attenuated Pandemic Influenza Virus Vaccine Candidates

Yumiko Matsuoka, Amorsolo L. Suguitan, Marlene S. Orandle et al. · 2014 · Journal of Virology

Live attenuated cold-adapted (ca) H5N1, H7N3, H6N1, and H9N2 influenza vaccine viruses replicated in the respiratory tract of mice and ferrets, and 2 doses of vaccines were immunogenic and protected these animals from challenge infection…

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Negative / Null Result ReportOpen accessMedicine

Hepatitis C Virus Genotype 5a Subgenomic Replicons for Evaluation of Direct-Acting Antiviral Agents

Constance Wose Kinge, Christine Espiritu, Nishi Prabdial‐Sing et al. · 2014 · Antimicrobial Agents and Chemotherapy

Hepatitis C virus (HCV) exists as six major genotypes that differ in geographical distribution, pathogenesis, and response to antiviral therapy. In vitro replication systems for all HCV genotypes except genotype 5 have been reported. In…

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Negative / Null Result ReportOpen accessMedicine

Factors associated with a higher rate of distant failure after primary treatment for glioblastoma

Sonia Tejada, Ricardo Díez-Valle, Guillermo Aldave et al. · 2013 · Journal of Neuro-Oncology

Our purpose was to analyze the pattern of failure in glioblastoma (GBM) patients at first recurrence after radiotherapy and temozolomide and its relationship with different factors. From 77 consecutive GBM patients treated at our institution with fluorescence guided surgery and standard radiochemotherapy, 58 first recurrences were identified and included in a retrospective review. Clinical data including age, Karnofsky performance score, preoperative tumor volume and location, extend of resection, MGMT promoter methylation status, time to progression (PFS), overall survival (OS) and adjuvant t

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Negative / Null Result ReportOpen accessMedicine

Fc Receptor-mediated Effector Function Contributes to the Therapeutic Response of Anti-TNF Monoclonal Antibodies in a Mouse Model of Inflammatory Bowel Disease

Bradford L. McRae, Alon D. Levin, Manon E. Wildenberg et al. · 2015 · Journal of Crohn s and Colitis

BACKGROUND AND AIMS: Anti-tumour necrosis factor [TNF] monoclonal antibodies [infliximab, adalimumab] induce complete mucosal healing in a proportion of patients with Crohn's disease whereas a TNF receptor fusion protein [etanercept] is…

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Negative / Null Result ReportOpen accessMedicine

Management of Primary Biliary Cholangitis: Current Treatment and Future Perspectives

Romelia Barba Bernal, Bryan W. Ferrigno, Esli Medina Morales et al. · 2023 · The Turkish Journal of Gastroenterology

Primary biliary cholangitis is an autoimmune cholestatic liver disease characterized by progressive destruction of bile ducts, which can ultimately progress to chronic liver disease and cirrhosis. Ursodeoxycholic acid and obeticholic acid are the only 2 Food and Drug Administration (FDA)-approved medications for primary biliary cholangitis. Unfortunately, up to 40% of patients with primary biliary cholangitis have an incomplete response to ursodeoxycholic acid, warranting an essential need for additional therapeutics. Peroxisome proliferator-activated receptor agonists have shown promising dat

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Negative / Null Result ReportOpen accessMedicine

Phase 2B randomized controlled trial of NP001 in amyotrophic lateral sclerosis: Pre‐specified and post hoc analyses

Robert G. Miller, Rongzhen Zhang, Paige M. Bracci et al. · 2022 · Muscle & Nerve

INTRODUCTION/AIMS: ALS is a heterogeneous disease that may be complicated or in part driven by inflammation. NP001, a regulator of macrophage activation, was associated with slowing disease progression in those with higher levels of the…

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Negative / Null Result ReportMedicine

Biophysical and Endocrine-Metabolic Changes during Menopausal Hot Flashes: Increase in Plasma Free Fatty Acid and Norepinephrine Levels

Mauro Cignarelli, Ettore Cicinelli, Mónica Corso et al. · 2010 · Gynecologic and Obstetric Investigation

Thermocutaneous, vascular, metabolic and hormonal changes were investigated during 11 hot flashes from 6 postmenopausal women. The first detectable change was an increase in finger blood flow with a concomitant enhancement of skin…

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