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Browse the failure-mode index

12,367 real negative results, null findings, and replication failures in Medicine. 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

Mortality in HIV and tuberculosis patients following implementation of integrated HIV-TB treatment: Results from an open-label cluster-randomized trial

Kogieleum Naidoo, Santhanalakshmi Gengiah, Nonhlanhla Yende‐Zuma et al. · 2022 · EClinicalMedicine

Background HIV-TB treatment integration reduces mortality. Operational implementation of integrated services is challenging. This study assessed the impact of quality improvement (QI) for HIV-TB integration on mortality within primary…

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Negative / Null Result ReportOpen accessMedicine

Improving PCASL at ultra‐high field using a VERSE‐guided parallel transmission strategy

Yan Tong, Peter Jezzard, Thomas W. Okell et al. · 2020 · Magnetic Resonance in Medicine

PURPOSE: To improve the labeling efficiency of pseudo-continuous arterial spin labeling (PCASL) at 7T using parallel transmission (pTx). METHODS: maps were acquired in the labeling plane for tagging pulse design. Complex weights of the labeling pulses for each of the 8 transmit channels were calculated to produce a homogenous radiofrequency (RF) -shimmed labeling across the ROIs. Variable-Rate Selective Excitation (VERSE) pulses were also implemented as a part of the labeling pulse train. Whole-brain perfusion-weighted images were acquired under conditions of RF shimming, VERSE with RF shimmin

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Negative / Null Result ReportOpen accessMedicine

The Error of Estimated GFR in Type 2 Diabetes Mellitus

Sergio Luis‐Lima, Tomás H. Higuera Linares, Laura Henríquez-Gómez et al. · 2019 · Journal of Clinical Medicine

Type 2 diabetes mellitus represents 30-50% of the cases of end stage renal disease worldwide. Thus, a correct evaluation of renal function in patients with diabetes is crucial to prevent or ameliorate diabetes-associated kidney disease. The reliability of formulas to estimate renal function is still unclear, in particular, those new equations based on cystatin-C or the combination of creatinine and cystatin-C. We aimed to assess the error of the available formulas to estimate glomerular filtration rate in diabetic patients. We evaluated the error of creatinine and/or cystatin-C based formulas

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Negative / Null Result ReportOpen accessMedicine

Functional co-activation of the default mode network in APOE ε4-carriers: A replication study

Lara J. Mentink, Joao Guimaraes, Myrthe Faber et al. · 2021 · NeuroImage

Structural and functional alterations of the brain in persons genetically at-risk for Alzheimer's disease (AD) are crucial in unravelling AD development. Filippini et al. found that the default mode network (DMN) is already affected in young APOE ε4-carriers, with increased co-activation of the DMN during rest and increased hippocampal task activation. We aimed to replicate the early findings of Filippini et al, using the APOE gene, still the principal AD risk gene, and extended this with a polygenic risk score (PRS) analysis for AD, using the Human Connectome Project dataset (HCP). We include

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Negative / Null Result ReportOpen accessMedicine

Are three weeks hypofractionated radiation therapy (HFRT) comparable to six weeks for newly diagnosed glioblastoma patients? Results of a phase II study

Pierina Navarria, Federico Pessina, Stefano Tomatis et al. · 2017 · Oncotarget

// Pierina Navarria 1, * , Federico Pessina 2, * , Stefano Tomatis 1 , Riccardo Soffietti 3 , Marco Grimaldi 4 , Egesta Lopci 5 , Arturo Chiti 5, 7 , Antonella Leonetti 9 , Alessandra Casarotti 2 , Marco Rossi 2 , Luca Cozzi 1 , Anna Maria Ascolese 1 , Matteo Simonelli 6, 7 , Simona Marcheselli 8 , Armando Santoro 6, 7 , Elena Clerici 1 , Lorenzo Bello 2 and Marta Scorsetti 1, 7 1 Radiotherapy and Radiosurgery Department, Humanitas Cancer Center and Research Hospital, Rozzano, Italy 2 Neurosurgical Oncology Department, Humanitas Cancer Center and Research Hospital, Rozzano, Italy 3 Consultant

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Negative / Null Result ReportOpen accessMedicine

Potential Influence of Anesthetic Interventions on Breast Cancer Early Recurrence According to Estrogen Receptor Expression: A Sub-Study of a Randomized Trial

Mohan Li, Yuelun Zhang, Lijian Pei et al. · 2022 · Frontiers in Oncology

Background Effects of anesthetic interventions on cancer prognosis remain controversial. There is evidence that estrogen receptor (ER)-negative breast cancer patients have an early recurrence peak. We aimed to assess the potential benefit of regional anesthesia-analgesia versus general anesthesia regarding early recurrence in breast cancer according to ER expression. Methods Based on a multicenter randomized controlled trial (clinicaltrials.gov, NCT00418457), we included all the patients from Peking Union Medical College Hospital research center in this study. The primary outcome was breast ca

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Negative / Null Result ReportMedicine

Intensive Care Unit Educators: A Multicenter Evaluation of Behaviors Residents Value in Attending Physicians

Lekshmi Santhosh, Snigdha Jain, Anna K. Brady et al. · 2017 · Annals of the American Thoracic Society

RATIONALE: It is important for attending physicians to know which behaviors influence learner perceptions. To date, two studies focusing on general medicine attending physicians have been published addressing internal medicine residents'…

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Negative / Null Result ReportOpen accessMedicine

Significant Differences in the Bacterial Microbiome of the Pharynx and Skin in Patients with Psoriasis Compared with Healthy Controls

Malin Assarsson, Jan Söderman, Olaf Dienus et al. · 2020 · Acta Dermato Venereologica

Studies have shown differences in the skin and gut bacterial microbiomes in patients with psoriasis, but the pharyngeal microbiome has not been studied previously. The aim of this study was to investigate differences in the bacterial…

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Negative / Null Result ReportOpen accessMedicine

Nutritional and Microbial Strategies for Treating Acne, Alopecia, and Atopic Dermatitis

Alejandro Borrego-Ruiz, Juan J. Borrego · 2024 · Nutrients

BACKGROUND/OBJECTIVES: Diet is one of the major determinants of the composition and function of the gut microbiome, and diverse studies have established directional connections between gut microbiome dysbiosis and skin dyshomeostasis. Furthermore, a significant link between the gut and certain skin-related disorders has been reported. This work reviews the mechanisms underlying the relationship between nutritional factors, gut microbiome, and certain skin diseases such as acne vulgaris, alopecia, and atopic dermatitis. In addition, it explores how the modulation of the gut microbiome and human

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Negative / Null Result ReportOpen accessMedicine

Primary Sjögren’s Disease: a review of unmet need, outcome measures, therapeutic advances and health economic impacts. Lessons from the NEw Clinical Endpoints in primary Sjögren’s Syndrome: an Interventional Trial based on stratifYing patients (NECESSITY) Innovative Health Initiative (IHI)

Simon Bowman, Raphaèle Séror, Raphaël Porcher et al. · 2025 · Annals of the Rheumatic Diseases

Primary Sjögren's disease (pSjD) is an autoimmune rheumatic disease involving exocrine glands and associated with high symptom burden (dryness, fatigue, pain), systemic features and salivary gland dysfunction. B-cell hyperactivity is common, with an increased risk of mucosa-associated lymphoid tissue lymphoma. This review describes the unmet need, scientific validity of outcome measures, optimisation of clinical trial design, therapeutic advances and how clinical improvement relates to health-related quality of life, additional quality-adjusted life years and economic benefit in pSjD. It deriv

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Negative / Null Result ReportOpen accessMedicine

Bi-specific T-cell engagers (BiTEs) in prostate cancer and strategies to enhance development: hope for a BiTE-r future

Harriet Lampe, Laura Tam, Aaron R. Hansen · 2024 · Frontiers in Pharmacology

Metastatic castrate resistant prostate cancer (mCRPC) continues to have poor survival rates due to limited treatment options. Bi-specific T cell engagers (BiTEs) are a promising class of novel immunotherapies with demonstrated success in haematological malignancies and melanoma. BiTEs developed for tumour associated antigens in prostate cancer have entered clinical testing. These trials have been hampered by high rates of treatment related adverse events, minimal or transient anti-tumour efficacy and generation of high titres of anti-drug antibodies. This paper aims to analyse the challenges f

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Failed Experiment ReportOpen accessMedicine

Chest computed tomography outcomes in a randomized clinical trial in cystic fibrosis: Lessons learned from the first ataluren phase 3 study

Harm A.W.M. Tiddens, Eleni‐Rosalina Andrinopoulou, Joe McIntosh et al. · 2020 · PLoS ONE

A phase 3 randomized double blind controlled, trial in 238 people with cystic fibrosis (CF) and at least one nonsense mutation (nmCF) investigated the effect of ataluren on FEV1. The study was of 48 weeks duration and failed to meet its primary endpoint. Unexpectedly, while FEV1 declined, chest computed tomography (CT) scores using the Brody-II score as secondary outcome measures did not show progression in the placebo group. Based on this observation it was concluded that the role of CT scans in CF randomized clinical trials was limited. However, more sensitive scoring systems were developed

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Negative / Null Result ReportOpen accessMedicine

Effect of a rice bran fiber diet on serum glucose levels of diabetic patients in Brazil

Cecília Rodrigues Silva, José Eduardo Dutra de Oliveira, Rui Augusto Hudari Gonçalves de Souza et al. · 2026 · Archivos Latinoamericanos de Nutrición

Eleven diabetic patients: 5, type 1 and 6, type 2 received a low-fiber diet (I) during 1 week and during the next 7 days the same diet, enriched with 40 g of fiber (30.6% insoluble and 11.7% soluble components) from rice bran (II) per day.…

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Negative / Null Result ReportOpen accessMedicine

Generative AI in Academic Writing: A Comparison of DeepSeek, Qwen, ChatGPT, Gemini, Llama, Mistral, and Gemma

Ömer Aydın, Enis Karaarslan, Fatih Safa Erenay et al. · 2026 · Turkish Journal of Engineering

DeepSeek v3, developed in China, was released in December 2024, followed by Alibaba’s Qwen 2.5 Max in January 2025 and Qwen3 235B in April 2025. These free and open-source models offer significant potential for academic writing and content…

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Negative / Null Result ReportOpen accessMedicine

Obeticholic Acid and Other Farnesoid-X-Receptor (FXR) Agonists in the Treatment of Liver Disorders

Stefano Fiorucci, Ginevra Urbani, Eleonora Distrutti et al. · 2025 · Pharmaceuticals

The Farnesoid-X-receptor (FXR) is a bile sensor involved in the regulation of bile acid homeostasis, fibrosis, inflammation, and metabolism. Obeticholic acid (OCA), a semisynthetic derivative of chenodeoxycholic acid (CDCA), initially named 6-ethyl-CDCA or INT-747, is the first in a class of FXR ligands that have been approved for clinical use for the treatment of patients with primary biliary cholangitis (PBC) who are unresponsive or intolerant to ursodeoxycholic acid. In this narrative review, we will examine the current status and future perspective of clinical use of OCA. Based on results

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Negative / Null Result ReportOpen accessMedicine

Prognostic and predictive role of EGFR pathway alterations in biliary cancer patients treated with chemotherapy and anti-EGFR

Caterina Peraldo‐Neia, Giuliana Cavalloni, Elisabetta Fenocchio et al. · 2018 · PLoS ONE

The association of anti-EGFR to gemcitabine and oxaliplatin (GEMOX) chemotherapy did not improve survival in biliary tract carcinoma (BTC) patients. Multiple mechanisms might be involved in the resistance to anti-EGFR. Here, we explored the mutation profile of EGFR extracellular domain (ECD), of tyrosine kinase domain (TKD), and its amplification status. EGFR mutational status of exons 12, 18-21 was analyzed in 57 tumors by Sanger sequencing. EGFR amplification was evaluated in 37 tumors by Fluorescent In Situ Hybridization (FISH). Kaplan-Meier curves were calculated using the log-rank test. S

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Negative / Null Result ReportOpen accessMedicine

Human metapneumovirus infection of organoid-derived human bronchial epithelium represents cell tropism and cytopathology as observed in in vivo models

Pau Ribó-Molina, Stefan van Nieuwkoop, Anna Z. Mykytyn et al. · 2024 · mSphere

ABSTRACT Human metapneumovirus (HMPV), a member of the Pneumoviridae family, causes upper and lower respiratory tract infections in humans. In vitro studies with HMPV have mostly been performed in monolayers of undifferentiated epithelial cells. In vivo studies in cynomolgus macaques and cotton rats have shown that ciliated epithelial cells are the main target of HMPV infection, but these observations cannot be studied in monolayer systems. Here, we established an organoid-derived bronchial culture model that allows physiologically relevant studies on HMPV. Inoculation with multiple prototype

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Negative / Null Result ReportOpen accessMedicine

Lack of significant association between serum inflammatory cytokine profiles and the presence of colorectal adenoma

Curtis J. Henry, Rebecca L. Sedjo, Andrii I. Rozhok et al. · 2015 · BMC Cancer

BACKGROUND: Inflammatory cytokines in the colonic microenvironment have been shown to increase with advance colorectal cancer disease state. However, the contribution of inflammatory cytokines to pre-malignant disease, such as the formation of adenomas, is unclear. METHODS: Using the Milliplex® MAP Human Cytokine/ Chemokine Magnetic Bead Panel Immunoassay, serum cytokine and chemokine profiles were assayed among participants without an adenoma (n = 97) and those with an adenoma (n = 97) enrolled in the NCI-funded Insulin Resistance Atherosclerosis Colon Study. The concentrations of interleukin

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Negative / Null Result ReportOpen accessMedicine

Mutations in the Neuraminidase-Like Protein of Bat Influenza H18N11 Virus Enhance Virus Replication in Mammalian Cells, Mice, and Ferrets

Gongxun Zhong, Shufang Fan, Masato Hatta et al. · 2019 · Journal of Virology

Bats are reservoirs for several severe zoonotic pathogens. The genomes of influenza A viruses of the H17N10 and H18N11 subtypes have been identified in bats, but no live virus has been isolated. The characterization of artificially…

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Negative / Null Result ReportOpen accessMedicine

Forced expression of miR-143 and -145 in cardiomyocytes induces cardiomyopathy with a reductive redox shift

Kota Ogawa, Akiko Noda, Jun Ueda et al. · 2020 · Cellular & Molecular Biology Letters

BACKGROUND: Animal model studies show that reductive stress is involved in cardiomyopathy and myopathy, but the exact physiological relevance remains unknown. In addition, the microRNAs miR-143 and miR-145 have been shown to be upregulated in cardiac diseases, but the underlying mechanisms associated with these regulators have yet to be explored. METHODS: We developed transgenic mouse lines expressing exogenous miR-143 and miR-145 under the control of the alpha-myosin heavy chain (αMHC) promoter/enhancer. RESULTS: The two transgenic lines showed dilated cardiomyopathy-like characteristics and

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Negative / Null Result ReportMedicine

Autoimmune pancreatitis and biliary intraepithelial neoplasia of the common bile duct: A case with diagnostically challenging but pathogenetically significant association

Haruo Ohtani, Hiroyasu Ishida, Yuka Ito et al. · 2011 · Pathology International

Autoimmune pancreatitis (AIP) (also called IgG4-related sclerosing pancreatitis (IgG4-SP)) and IgG4-related sclerosing cholangitis (IgG4-SC) are frequently associated with each other. It is generally believed that association of these…

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Negative / Null Result ReportOpen accessMedicine

Randomized, Double-Blind, Placebo-Controlled Phase III Study of Paclitaxel ± Napabucasin in Pretreated Advanced Gastric or Gastroesophageal Junction Adenocarcinoma

Manish A. Shah, Kohei Shitara, Florian Lordick et al. · 2022 · Clinical Cancer Research

PURPOSE: To compare napabucasin (generator of reactive oxygen species) plus paclitaxel with paclitaxel only in patients with second-line advanced gastric or gastroesophageal junction (GEJ) adenocarcinoma. EXPERIMENTAL DESIGN: In the…

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Negative / Null Result ReportOpen accessMedicine

Orally active prostacyclin analogue beraprost sodium in patients with chronic kidney disease: a randomized, double-blind, placebo-controlled, phase II dose finding trial

Akio Kôyama, Toshiro Fujita, Fumitake Gejyo et al. · 2015 · BMC Nephrology

BACKGROUND: Evidence increasingly points to the importance of chronic hypoxia in the tubulointerstitium as a final common pathway to end-stage renal disease (ESRD). Beraprost sodium (BPS) is an orally active prostacyclin (PGI2) analogue demonstrating prevention of the progression of chronic kidney disease (CKD) in various animal models by maintaining renal blood flow and attenuating renal ischemic condition. METHODS: This multicenter, randomized, double-blind, placebo-controlled, phase II trial was designed to determine the recommended dose of the sustained-release form of BPS (TRK-100STP 120

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