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11,406 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

Genetic Association Analysis in a Clinically and Histologically Confirmed Otosclerosis Population Confirms Association With the TGFB1 Gene but Suggests an Association of the RELN Gene With a Clinically Indistinguishable Otosclerosis-Like Phenotype

Manou Sommen, Guy Van Camp, Balázs Liktor et al. · 2014 · Otology & Neurotology

BACKGROUND/HYPOTHESIS: Otosclerosis is a frequent cause of hearing impairment characterized by abnormal resorption and deposition of bone in the human otic capsule. It is a disease of complex etiopathogenesis that is caused by both…

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Negative / Null Result ReportOpen accessMedicine

Genetic susceptibility loci of idiopathic interstitial pneumonia do not represent risk for systemic sclerosis: a case control study in Caucasian patients

Minghua Wu, Shervin Assassi, Gloria A. Salazar et al. · 2016 · Arthritis Research & Therapy

BACKGROUND: Systemic sclerosis (SSc)-related interstitial lung disease (ILD) has phenotypic similarities to lung involvement in idiopathic interstitial pneumonia (IIP). We aimed to assess whether genetic susceptibility loci recently identified in the large IIP genome-wide association studies (GWASs) were also risk loci for SSc overall or severity of ILD in SSc. METHODS: A total of 2571 SSc patients and 4500 healthy controls were investigated from the US discovery GWAS and additional US replication cohorts. Thirteen IIP-related selected single nucleotide polymorphisms (SNPs) were genotyped and

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Negative / Null Result ReportOpen accessMedicine

Novel Treatment Strategies for Hormone Receptor (HR)-Positive, HER2-Negative Metastatic Breast Cancer

Antonella Ferro, Michela Campora, A. Caldara et al. · 2024 · Journal of Clinical Medicine

Estrogen receptor (ER)-positive breast cancer (BC) is the most common BC subtype. Endocrine therapy (ET) targeting ER signaling still remains the mainstay treatment option for hormone receptor (HR)-positive BC either in the early or in advanced setting, including different strategies, such as the suppression of estrogen production or directly blocking the ER pathway through SERMs—selective estrogen receptor modulators—or SERDs—selective estrogen receptor degraders. Nevertheless, the development of de novo or acquired endocrine resistance still remains challenging for oncologists. The use of no

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Negative / Null Result ReportOpen accessMedicine

Ghrelin ameliorates tumor-induced adipose tissue atrophy and inflammation via Ghrelin receptor-dependent and -independent pathways

Haiming Liu, Jiaohua Luo, Bobby Guillory et al. · 2020 · Oncotarget

// Haiming Liu 1 , 2 , * , Jiaohua Luo 3 , 4 , * , Bobby Guillory 3 , Ji-an Chen 3 , 5 , Pu Zang 3 , 6 , Jordan K. Yoeli 3 , Yamileth Hernandez 3 , Ian (In-gi) Lee 1 , 2 , Barbara Anderson 1 , 2 , Mackenzie Storie 1 , 2 , Alison Tewnion 1 and Jose M. Garcia 1 , 2 , 3 1 Geriatric Research, Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA 2 Gerontology and Geriatric Medicine, University of Washington Department of Medicine, Seattle, WA, USA 3 Division of Endocrinology, Diabetes and Metabolism, MCL, Center for Translational Research on Inflammatory

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Negative / Null Result ReportOpen accessMedicine

DNA Methylation Signatures of Breastfeeding in Buccal Cells Collected in Mid-Childhood

Veronika V. Odintsova, Fiona A. Hagenbeek, Matthew Suderman et al. · 2019 · Nutrients

Breastfeeding has long-term benefits for children that may be mediated via the epigenome. This pathway has been hypothesized, but the number of empirical studies in humans is small and mostly done by using peripheral blood as the DNA source. We performed an epigenome-wide association study (EWAS) in buccal cells collected around age nine (mean = 9.5) from 1006 twins recruited by the Netherlands Twin Register (NTR). An age-stratified analysis examined if effects attenuate with age (median split at 10 years; n<10 = 517, mean age = 7.9; n>10 = 489, mean age = 11.2). We performed replication

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Negative / Null Result ReportOpen accessMedicine

Patterns of failure after multimodal treatments for high-grade glioma: effectiveness of MIB-1 labeling index

Kazuyuki Uehara, Takashi Sasayama, Daisuke Miyawaki et al. · 2012 · Radiation Oncology

BACKGROUND: The purpose of the present study was to analyze the recurrence pattern of high-grade glioma treated with a multimodal treatment approach and to evaluate whether the MIB-1 labeling index (LI) could be a useful marker for predicting the pattern of failure in glioblastoma (GB). METHODS AND MATERIALS: We evaluated histologically confirmed 131 patients with either anaplastic astrocytoma (AA) or GB. A median dose was 60 Gy. Concomitant and adjuvant chemotherapy were administered to 111 patients. MIB-1 LI was assessed by immunohistochemistry. Recurrence patterns were categorized according

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Negative / Null Result ReportOpen accessMedicine

Single-cell transcriptomic atlas of Alzheimer's disease middle temporal gyrus reveals region, cell type, and sex specificity of gene expression with novel genetic risk for MERTK in female

Le Zhang, Tianyu Liu, Chuan H. He et al. · 2026 · Journal of Alzheimer s Disease

Abstract Alzheimer’s disease, the most common age-related neurodegenerative disease, is closely associated with both amyloid-ß plaque and neuroinflammation. Two thirds of Alzheimer’s disease patients are females and they have a higher…

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Negative / Null Result ReportOpen accessMedicine

Treatment of chronic leg ulcers with a hydrocolloid dressing

P. Gamborg Nielsen, S Madsen, L. Strömberg · 2026 · Acta Dermato Venereologica

The effects of a hydrocolloid dressing (Comfeel Ulcus) on the physical environment of chronic leg ulcers in 58 consecutive out-patients were investigated. Patients were subdivided into two groups of which Group 1 included 31 (53.4%) and…

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Negative / Null Result ReportOpen accessMedicine

The V Protein of Canine Distemper Virus Is Required for Virus Replication in Human Epithelial Cells

Noriyuki Otsuki, Yuichiro Nakatsu, Toru Kubota et al. · 2013 · PLoS ONE

Canine distemper virus (CDV) becomes able to use human receptors through a single amino acid substitution in the H protein. In addition, CDV strains possessing an intact C protein replicate well in human epithelial H358 cells. The present study showed that CDV strain 007Lm, which was isolated from lymph node tissue of a dog with distemper, failed to replicate in H358 cells, although it possessed an intact C protein. Sequence analyses suggested that a cysteine-to-tyrosine substitution at position 267 of the V protein caused this growth defect. Analyses using H358 cells constitutively expressing

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Negative / Null Result ReportOpen accessMedicine

Loss-of-function mutation in Omicron variants reduces spike protein expression and attenuates SARS-CoV-2 infection

Michelle N. Vu, R. Elias Alvarado, Dorothea R. Morris et al. · 2026 · Nature Communications

Abstract SARS-CoV-2 Omicron variants emerged in 2022 with >30 novel amino acid mutations in the spike protein alone. While most studies focus on receptor binding domain changes, mutations in the C-terminus of S1 (CTS1), adjacent to the…

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Negative / Null Result ReportOpen accessMedicine

Overcoming resistance to PD-1 and CTLA-4 blockade mechanisms and therapeutic strategies

Xiaodong Wang, Jing He, Gouping Ding et al. · 2025 · Frontiers in Immunology

Immune checkpoint inhibitors (ICIs) targeting PD-1 and CTLA-4 have achieved groundbreaking clinical success in multiple cancers; however, a large proportion of patients experience primary or acquired resistance. This review synthesizes the complex mechanisms underlying resistance to PD-1/CTLA-4 blockade and surveys emerging strategies to overcome them. Resistance arises from multifaceted interactions among tumor-intrinsic alterations (e.g., epigenetic silencing of antigen presentation machinery via EZH2/PRC2, oncogenic pathway-driven upregulation of PD-L1, genetic loss of IFNγ pathway componen

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Negative / Null Result ReportOpen accessMedicine

Effect of Lactobacillus plantarum supplementation on trimethylamine-N-oxide levels in 30 patients with atherosclerotic cardiovascular disease: A double-blind randomized controlled trial

Natalia Spasova, Desislava Somleva, Bozhidar Krastev et al. · 2024 · Folia Medica

Introduction : Trimethylamine-N-oxide (TMAO) is a metabolite produced by intestinal microbiota. It is well recognized as an independent risk marker for cardiovascular and renal diseases and mortality. Aim : The aim of the present study was…

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Negative / Null Result ReportOpen accessMedicine

GLP-1 and the Degenerating Brain: Exploring Mechanistic Insights and Therapeutic Potential

Osama Sobhi Moaket, Sarah Eyad Obaid, Fawaz Eyad Obaid et al. · 2025 · International Journal of Molecular Sciences

Neurodegenerative disorders, including Alzheimer's disease (AD), Parkinson's disease (PD), stroke, and depression, are marked by progressive neuronal dysfunction and loss, yet current treatments remain largely symptomatic with limited disease-modifying efficacy. Glucagon-like peptide-1 (GLP-1), an incretin hormone traditionally associated with metabolic regulation, has emerged as a promising neuroprotective agent. Its receptor, GLP-1R, is expressed in key brain regions implicated in cognition, emotion, and motor control, including the hippocampus, frontal cortex, and substantia nigra. GLP-1R a

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Negative / Null Result ReportOpen accessMedicine

Revisión de los métodos de evaluación de la actividad antioxidante in vitro del vino y valoración de sus efectos in vivo

Ma Soledad Fernández-Pachón, Débora Villaño, Ana M. Troncoso et al. · 2026 · Archivos Latinoamericanos de Nutrición

El objetivo de esta revisión es el estudio de la actividad antioxidante del vino, analizando los distintos métodos que se han empleado en su evaluación. Esta actividad se relacionará, tanto desde el punto de vista cualitativo como…

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Negative / Null Result ReportOpen accessMedicine

Antibody-drug conjugates in gynecologic cancer: current landscape, clinical data, and emerging targets

Juan He, Mi Chen, Jia Li et al. · 2025 · International Journal of Gynecological Cancer

Antibody-drug conjugates (ADCs) are an emerging class of targeted therapies that combine monoclonal antibodies with potent cytotoxic payloads, demonstrating significant potential in the treatment of gynecologic malignancies. By selectively targeting tumor-associated antigens, ADCs enable precise drug delivery while minimizing off-target toxicity. Currently, mirvetuximab soravtansine and tisotumab vedotin have been approved by the Food and Drug Administration for the treatment of folate receptor-alpha-positive, platinum-resistant ovarian cancer and recurrent cervical cancer, respectively, exhib

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Negative / Null Result ReportOpen accessMedicine

No significant difference found in PET/MRI CBF values reconstructed with CT-atlas-based and ZTE MR attenuation correction

Hidehiko Okazawa, Tetsuya Tsujikawa, Yoshifumi Higashino et al. · 2019 · EJNMMI Research

Accurate attenuation correction (AC) is one of the most important issues to be addressed in quantitative brain PET/MRI imaging. Atlas-based MRI AC (AB-MRAC), one of the representative MRAC methods, has been used to estimate the skull attenuation in brain scans. The zero echo time (ZTE) pulse sequence is also expected to provide a better MRAC estimation in brain PET scans. The difference in quantitative measurements of cerebral blood flow (CBF) using H215O-PET/MRI was compared between the two MRAC methods, AB and ZTE. Twelve patients with cerebrovascular disease (4 males, 43.2 ± 11.7 years) und

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Negative / Null Result ReportOpen accessMedicine

Association of maternal pre-pregnancy BMI and breastfeeding with NAFLD in young adults: a parental negative control study

Kushala Abeysekera, James Orr, Paul Madley‐Dowd et al. · 2021 · The Lancet Regional Health - Europe

BACKGROUND: The importance of the maternal-infant dyad in the genesis of nonalcoholic fatty liver disease (NAFLD) is of increasing interest. The Avon Longitudinal Study of Parents and Children (ALSPAC) showed that at age 24, 1 in 5 had…

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Negative / Null Result ReportOpen accessMedicine

Significant differences in T cell receptor repertoires in lung adenocarcinomas with and without epidermal growth factor receptor mutations

Eisaku Miyauchi, Tatsuo Matsuda, Kazuma Kiyotani et al. · 2018 · Cancer Science

Recent clinical trials of non-small cell lung cancer with immune checkpoint inhibitors revealed that patients with epidermal growth factor receptor (EGFR) mutations had more unfavorable outcomes compared with those with wild-type EGFR.…

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Negative / Null Result ReportOpen accessMedicine

Combining naproxen and a dual amylin and calcitonin receptor agonist improves pain and structural outcomes in the collagen-induced arthritis rat model

Anna Katri, Aneta Dąbrowska, Henrik Löfvall et al. · 2019 · Arthritis Research & Therapy

BACKGROUND: Pain is a debilitating symptom of rheumatoid arthritis (RA), caused by joint inflammation and cartilage and bone destruction. Nonsteroidal anti-inflammatory drugs (NSAIDs) are used to treat pain and inflammation in RA, but are not disease-modifying and do not prevent joint destruction when administered alone. KBPs (Key Bioscience peptides) are synthetic peptides based on salmon calcitonin and are expected to inhibit bone resorption and to be chondroprotective. In this study, we investigated if combining a standard of care NSAID (naproxen) with a KBP resulted in improvement in pain

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Negative / Null Result ReportOpen accessMedicine

Treatment with the copper compound CuATSM has no significant effect on motor neuronal pathology in patients with ALS

Yue Yang, Dominic B. Rowe, Heather McCann et al. · 2023 · Neuropathology and Applied Neurobiology

AIMS: Although the orally available brain-penetrant copper compound CuATSM has demonstrated promising effects in SOD1-linked mouse models, the impact of CuATSM on disease pathology in patients with amyotrophic lateral sclerosis (ALS) remains unknown. METHODS: The present study set out to address this deficit by performing the first pilot comparative analysis of ALS pathology in patients that had been administered CuATSM and riluzole [N = 6 cases composed of ALS-TDP (n = 5) and ALS-SOD1 (n = 1)] versus riluzole only [N = 6 cases composed of ALS-TDP (n = 4) and ALS-SOD1 (n = 2)]. RESULTS: Our re

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Negative / Null Result ReportOpen accessMedicine

Minimizing pre- and post-shock pauses during the use of an automatic external defibrillator by two different voice prompt protocols. A randomized controlled trial of a bundle of measures

Stefanie G. Beesems, Jocelyn Berdowski, Michiel Hulleman et al. · 2016 · Resuscitation

BACKGROUND: Previous large retrospective analyses have found an association between duration of peri-shock pauses in cardiopulmonary resuscitation (CPR) and survival. In a randomized trial, we tested whether shortening these pauses…

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Negative / Null Result ReportOpen accessMedicine

Machine learning prediction model of acute kidney injury after percutaneous coronary intervention

Toshiki Kuno, Takahisa Mikami, Yuki Sahashi et al. · 2022 · Scientific Reports

Acute kidney injury (AKI) after percutaneous coronary intervention (PCI) is associated with a significant risk of morbidity and mortality. The traditional risk model provided by the National Cardiovascular Data Registry (NCDR) is useful for predicting the preprocedural risk of AKI, although the scoring system requires a number of clinical contents. We sought to examine whether machine learning (ML) techniques could predict AKI with fewer NCDR-AKI risk model variables within a comparable PCI database in Japan. We evaluated 19,222 consecutive patients undergoing PCI between 2008 and 2019 in a Ja

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Negative / Null Result ReportOpen accessMedicine

Switch to low-fat diet improves outcome of acute lymphoblastic leukemia in obese mice

Jonathan Tucci, Waseem Alhushki, Ting Chen et al. · 2018 · Cancer & Metabolism

BACKGROUND: It is becoming increasingly recognized that weight and nutritional status can impact cancer survival. We have previously shown that obese mice with syngeneic acute lymphoblastic leukemia (ALL) have poorer response to chemotherapy treatment than control mice. We therefore investigated whether dietary intervention could improve outcome from the most common pediatric cancer, ALL. METHODS: Diet-induced obese (DIO) mice raised on a 60% calories from fat diet and control mice were implanted with syngeneic ALL cells. Some DIO mice were switched to the low-fat control diet. Survival from A

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Negative / Null Result ReportOpen accessMedicine

Barriers to Participation in a Community-Based Program to Control Transmission of Taenia solium in Peru

Michelle Beam, Angela G. Spencer, Lauralee Fernandez et al. · 2018 · American Journal of Tropical Medicine and Hygiene

larvae (neurocysticercosis) is a leading cause of preventable epilepsy worldwide. Effective and sustainable strategies to control parasite transmission in rural endemic communities are needed to prevent the disease. Surveillance and…

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Negative / Null Result ReportOpen accessMedicine

Fatty acid amide hydrolase binding is inversely correlated with amygdalar functional connectivity: a combined positron emission tomography and magnetic resonance imaging study in healthy individuals

Duncan G.J. Green, Jinhee Kim, Stephen J. Kish et al. · 2021 · Journal of Psychiatry and Neuroscience

Background: Upregulation of the endocannabinoid enzyme fatty acid amide hydrolase (FAAH) has been linked to abnormal activity in frontoamygdalar circuits, a hallmark of posttraumatic stress disorder. We tested the hypothesis that FAAH…

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