Results 81 to 90 of about 16,457 (321)

Nitrogen‐Boosted H2O2 Production of Arginine‐Polyphenol Nanozyme Drives Oxidative Eustress for Hair Regeneration

Advanced Science, EarlyView.
PEA nanoenzymes are assembled from L‐arginine and EGCG. The nitrogen element in arginine enhances the thermodynamic feasibility of H2O2 production through PEA's oxygen reduction catalysis, enabling nitrogen‐dependent H2O2 release. Intradermal delivery of PEA via microneedles promotes efficient H2O2 synthesis, thereby stimulating regrowth in telogen ...
Yifei Wang, Yaojia Yang, Aoxue Wang, Chen Shen, Shenliang Tan, Changsheng Liu, Yuzheng Zhao, Xue Qu   +7 more
wiley   +1 more source

Migrasomes in Ischemic Stroke: Molecular Landscape and Pathophysiological Impact

Advanced Science, EarlyView.
Multi‐omics profiling of stroke patients exposes systemic molecular fingerprints of immune activation, oxidative stress and metabolic collapse. Complement and coagulation cascade, and cholesterol metabolism emerge as shared functional hallmarks of plasma migrasomes in stroke patients and migrasomes isolated from experimental stroke mice.
Huifen Zhou, Yingying Zhang, Peng Zhou, Haofang Wan, Lingling Li, Bin Xu, Yuping Wan, Yingming Song, Yi Kang, Hongbo Zhang, Min Shi, Qun Hou, Jiehong Yang, Chen Ding, Wei Fu, Buchang Zhao, Haitong Wan   +16 more
wiley   +1 more source

Microglial Membranes Wrapped Ultrasmall Medium‐Entropy Ru Single‐Atom Nanozyme: Enhanced Catalysis for Accelerating Inflammation/Redox Microenvironment Regulation in Intracerebral Hemorrhage

Advanced Science, EarlyView.
PtRhIr/Ru SAN@M nanozymes cross the blood–brain barrier and selectively accumulate in hemorrhagic brain regions. By mimicking multiple enzyme activities, they attenuate oxidative stress, modulate microglial polarization toward an anti‐inflammatory phenotype, inhibit ferroptosis, and promote neuronal repair.
Jiebo Li, Penghui Wei, Yuanbo Pan, Hongjia Zheng, Jiajun Hu, Qianxi Chen, Zhongyuan Shen, Yongrui Hu, Jiajun Wu, Fuxin Lin, Fuxiang Chen, Chenyu Ding, Wenhua Fang, Yuanxiang Lin, Dezhi Kang, Yuxiang Gu, Yang Zhu, Dengliang Wang   +17 more
wiley   +1 more source

Adropin modulates pancreatic cell proliferation and glutathione levels in an animal model of type 1 diabetes mellitus

Animal Models and Experimental Medicine, EarlyView.
Adropin is related to the energy homeostasis‐associated gene. It significantly increased glutathione reductase enzyme levels in the pancreas of experimental diabetic rats. Adropin may reduce the severity of diabetes and its complications. Cell proliferation in the exocrine is reduced after the administration of adropin.
Ifrah I. Ali, Crystal D'Souza, Abderrahim Nemmar, Shreesh Ojha, Ernest A. Adeghate   +4 more
wiley   +1 more source

Untersuchungen zum Ursprung der Substratspezifität von Enzymen der Amidohydrolase‐Superfamilie

Angewandte Chemie, EarlyView.
Umfassende Analysen zweier Enzymklassen aus der Amidohydrolase‐Superfamilie (AHS) ergaben, dass die Katalyse über eine 1,4‐ bzw. 1,6‐nukleophile konjugierte Addition abläuft und diese Eigenschaft die Substratspezifität bestimmt. Obwohl alle Substrate und Produkte vollständig achiral sind, führt dieser mechanistische Unterschied zu einer invertierten ...
Lukas Drexler, Torben F. Fürtges, Till Rudack, Reinhard Sterner   +3 more
wiley   +1 more source

On the Origin of Substrate Specificity of Enzymes from the Amidohydrolase Superfamily

Angewandte Chemie International Edition, EarlyView.
Comprehensive analyses of two enzyme classes from the amidohydrolase superfamily (AHS) revealed that catalysis proceeds either via 1,4 or 1,6 nucleophilic conjugate addition and that this property defines substrate specificity. Moreover, although all substrates and products are entirely achiral, this mechanistic difference results in an inverted ...
Lukas Drexler, Torben F. Fürtges, Till Rudack, Reinhard Sterner   +3 more
wiley   +1 more source

Myo‐Inositol Mitigates Oxidative Stress in Bovine Mammary Epithelial Cells via Activation of the SIRT5/Nrf2 Signaling Axis

Animal Research and One Health, EarlyView.
Myo‐inositol alleviates oxidative stress in dairy cow mammary epithelial cells via the Sirt5/Nrf2 pathway to promote mitochondrial fusion. This graphical abstract was created with BioRender.com. ABSTRACT High‐yielding dairy cows are susceptible to mammary gland oxidative stress due to prolonged intensive lactation, leading to redox imbalance.
Yufei Zhang, Yu Cao, Meng Zhang, Huijie Hu, He Ma, Junlong Bi, Juxiong Liu, Shoupeng Fu, Wenjin Guo   +8 more
wiley   +1 more source

Absolute bioavailability and intravenous pharmacokinetics of N‐acetyl‐D‐mannosamine in humans

British Journal of Clinical Pharmacology, EarlyView.
Aims N‐acetyl‐D‐mannosamine monohydrate (ManNAc) is a naturally occurring monosaccharide that has attracted considerable attention for its potential in treating GNE myopathy, a rare autosomal recessive muscle disorder. Despite its promise as an oral treatment, the absolute bioavailability of oral ManNAc has not been determined and there has been no ...
Tahlia R. Meola, Guy Ludbrook, Gianfranco Fornasini, Olga Pavlova, Sumit Jain, Allan M. Evans, Stephanie E. Reuter   +6 more
wiley   +1 more source

Xanthine oxidoreductase and xanthine oxidase in human cornea.

Histology and histopathology, 2002
Xanthine oxidoreductase (xanthine dehydrogenase + xanthine oxidase) is a complex enzyme that catalyzes the oxidation of hypoxanthine to xanthine, subsequently producing uric acid. The enzyme complex exists in separate but interconvertible forms, xanthine dehydrogenase and xanthine oxidase, which generate reactive oxygen species (ROS), a well known ...
Cejkova, J., Ardan, T., Filipec, M., Midelfart, A.   +3 more
openaire   +3 more sources

Synthesis and physical-chemical properties of 3-benzyl-8-(5-mercapto-4-phenyl-[1,2,4]-triazole-3-ylmethylthiomethyl)xanthine and its s-substituted derivatives

Aktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2015
Aim. Currently, researches, devoted to obtain new active compounds, are carried out among various classes of organic compounds, and combination of several active heterocyclic fragments in one molecule is considered the key way in such researches ...
K. V. Аleksandrova, A. S. Shkoda, S. V. Levich, M. V. Dyachkov, D. M. Yurchenko   +4 more
doaj   +1 more source