Results 41 to 50 of about 579 (178)

Interpretation of in vitro concentration‐response data for risk assessment and regulatory decision‐making: Report from the 2022 IWGT quantitative analysis expert working group meeting

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Quantitative risk assessments of chemicals are routinely performed using in vivo data from rodents; however, there is growing recognition that non‐animal approaches can be human‐relevant alternatives. There is an urgent need to build confidence in non‐animal alternatives given the international support to reduce the use of animals in toxicity ...
Marc A. Beal, Guangchao Chen, Kerry L. Dearfield, Min Gi, Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Alexandra S. Long, David P. Lovell, Barbara L. Parsons, Stefan Pfuhler, John Wills, Andreas Zeller, George Johnson, Paul A. White   +14 more
wiley   +1 more source

Severity of effect considerations regarding the use of mutation as a toxicological endpoint for risk assessment: A report from the 8th International Workshop on Genotoxicity Testing (IWGT)

Environmental and Molecular Mutagenesis, EarlyView.
Abstract Exposure levels without appreciable human health risk may be determined by dividing a point of departure on a dose–response curve (e.g., benchmark dose) by a composite adjustment factor (AF). An “effect severity” AF (ESAF) is employed in some regulatory contexts.
Barbara L. Parsons, Marc A. Beal, Kerry L. Dearfield, George R. Douglas, Min Gi, B. Bhaskar Gollapudi, Robert H. Heflich, Katsuyoshi Horibata, Michelle Kenyon, Alexandra S. Long, David P. Lovell, Anthony M. Lynch, Meagan B. Myers, Stefan Pfuhler, Alisa Vespa, Andreas Zeller, George E. Johnson, Paul A. White   +17 more
wiley   +1 more source

Inherited metabolic epilepsies–established diseases, new approaches

Epilepsia Open, EarlyView.
Abstract Inherited metabolic epilepsies (IMEs) represent the inherited metabolic disorders (IMDs) in which epilepsy is a prevailing component, often determining other neurodevelopmental outcomes associated with the disorder. The different metabolic pathways affected by individual IMEs are the basis of their rarity and heterogeneity.
Itay Tokatly Latzer, Phillip L. Pearl
wiley   +1 more source

Intensification of Extraction Technologies for Functional Antioxidative Molecules From Black Pigmented Rice (Oryza sativa L.) and High‐Resolution Mass Spectrometry (HRMS) of Rice Metabolome

Food Safety and Health, EarlyView.
An efficient green technique of extraction for obtaining functional molecules from black pigmented rice (BPR) is ultrasound‐probe‐assisted extraction (UPAE), which provides a viable alternative for conventional approaches of extraction methods in the formulations of functional or nutraceutical foods on a large scale and a great interest to the academic
Saloni Rai, Dinesh Chandra Rai, Raj Kumar Duary   +2 more
wiley   +1 more source

Subtle Alterations in Hippocampal Neuronal Activity Coincide With Early Sex‐Specific Differences in Amyloidosis and Microglia in a Pre‐Symptomatic Mouse Model of Alzheimer‐Like Pathology

Glia, EarlyView.
In a pre‐symptomatic mouse model of Alzheimer disease, despite higher amyloid‐β load, females display fewer plaques than males. More efficient synaptic transmission as well as less microgliosis point to better early coping with pathogenesis in females.
Thomas Chaigneau, Sha Sha, Candice M. Roux, Saba Aïd, Alice Faucher, Yannick Chantran, Guillaume Dorothée, Slavica Krantic   +7 more
wiley   +1 more source

Human hypoxanthine-guanine phosphoribosyltransferase.

Journal of Biological Chemistry, 1983
A mutant form of human hypoxanthine-guanine phosphoribosyltransferase (HPRTToronto) was isolated from erythrocytes of a male patient with gout due to a partial deficiency of enzyme activity. The tryptic peptides of HPRTToronto were mapped by reverse-phase high pressure liquid chromatography in an attempt to define the precise abnormality in its primary
James M. Wilson, I H Fox, R Kobayashi, William N. Kelley   +3 more
openaire   +3 more sources

Enzymová syntéza DNA modifikované v malém žlábku [PDF]

, 2020
In the first part of the thesis, a series of six modified 2'-deoxyadenosine triphosphates, bearing small functional groups (chloro, amino, methyl, vinyl, ethynyl and phenyl) at position 2 of adenine, was designed and synthesised. They were then tested as
Matyašovský, Ján
core  

Estudio metabólico de los efectos de la hiperacetatemia secundaria a la concentración de ácido acético presente en el líquido de diálisis convencional en pacientes con enfermedad renal crónica estadio 5D en hemodiálisis en comparación con un líquido de diálisis libre de este [PDF]

, 2023
En la actualidad, el líquido de diálisis convencional incluye acetato para conseguir su estabilidad química, es decir, para evitar la precipitación de sales de bicarbonato cálcico o magnésico. Esa concentración de acetato, 3-4 mmol/L, que no superaría la
Broseta Monzó, José Jesús
core  

Association between prediagnostic serum metabolites and pancreatic ductal adenocarcinoma risk in two prospective cohorts

International Journal of Cancer, EarlyView.
What's New? Exposures and mechanisms that contribute to and promote pancreatic ductal adenocarcinoma (PDAC) remain unclear. In this study, the authors applied metabolomics to better understand PDAC etiology by examining associations between prediagnostic serum metabolites and PDAC risk.
Ting Zhang, Steven C. Moore, Sheng Fu, Xiaoyu Wang, Demetrius Albanes, Stephanie J. Weinstein, Kai Yu, Rachael Z. Stolzenberg‐Solomon   +7 more
wiley   +1 more source

Effects of catechins, resveratrol, silymarin components and some of their conjugates on xanthine oxidase‐catalyzed xanthine and 6‐mercaptopurine oxidation

Journal of the Science of Food and Agriculture, Volume 105, Issue 5, Page 2765-2776, 30 March 2025.
Abstract BACKGROUND Over the past two decades, the global incidence of gout has markedly increased, affecting people worldwide. Considering the side effects of xanthine oxidase (XO) inhibitor drugs (e.g. allopurinol and febuxostat) used in the treatment of hyperuricemia and gout, the potential application of phytochemicals has been widely studied.
Tímea Bencsik, Orsolya Balázs, Róbert G Vida, Balázs Z Zsidó, Csaba Hetényi, Kateřina Valentová, Miklós Poór   +6 more
wiley   +1 more source