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Chryxanthone A, an extracted substance from endophytic fungal Aspergillus versicolor, produces anti-oxidant neuroprotection possibly via the action on mTOR/CREB axis.
Gene
January 2025
Translational Medicine Center of Pain, Emotion and Cognition, Health Science Center, Ningbo University, Ningbo 315211 Zhejiang, China. Electronic address:
Background: Neurons are susceptible to oxidative stress due to the elevated reactive oxygen species (ROS) production and the limited antioxidant defense mechanisms. Therefore, it is possible to treat oxidative stress-related neurological disorders via the inhibition of oxidative stress. Chryxanthone A is an extracted substance derived from the endophytic fungal Aspergillus versicolor, with an atypical dihydropyran ring.
View Article and Find Full Text PDFTargeting the NLRP3 inflammasome in Parkinson's disease: From molecular mechanism to therapeutic strategy.
Exp Neurol
January 2025
Department of Clinical Laboratory Medicine, Zhuzhou Kind Cardiovascular Disease Hospital, Hunan Province, China. Electronic address:
Parkinson's disease is the second most common neurodegenerative disease, characterized by substantial loss of dopaminergic (DA) neurons, the formation of Lewy bodies (LBs) in the substantia nigra, and pronounced neuroinflammation. The nucleotide-binding domain like leucine-rich repeat- and pyrin domain-containing protein 3 (NLRP3) inflammasome is one of the pattern recognition receptors (PRRs) that function as intracellular sensors in response to both pathogenic microbes and sterile triggers associated with Parkinson's disease. These triggers include reactive oxygen species (ROS), misfolding protein aggregation, and potassium ion (K) efflux.
View Article and Find Full Text PDFAn R2R3-MYB transcription factor PdbMYB6 enhances drought tolerance by mediating reactive oxygen species scavenging, osmotic balance, and stomatal opening.
Plant Physiol Biochem
January 2025
College of Forestry, Shenyang Agricultural University, Shenyang, Liaoning, 110866, China; The Key Laboratory of Forest Tree Genetics, Breeding and Cultivation of Liaoning Province, Shenyang Agricultural University, Shenyang, Liaoning, 110866, China. Electronic address:
Drought is a major environmental challenge that hinders the growth and development of plants. R2R3-MYB transcription factors (TFs) play a vital role in mediating responses to abiotic stress; however, their specific functions in Populus davidiana × Populus bolleana hybrid poplar plants remain underexplored. This study focused on PdbMYB6, a novel R2R3-MYB TF identified in P.
View Article and Find Full Text PDFExploring the Ascorbate Requirement of the 2-Oxoglutarate-Dependent Dioxygenases.
J Med Chem
January 2025
Ma̅tai Ha̅ora - Centre for Redox Biology and Medicine, Department of Biomedical Science and Pathology, University of Otago, Christchurch, Christchurch 8140, New Zealand.
In humans, the 2-oxoglutarate-dependent dioxygenases (2-OGDDs) catalyze hydroxylation reactions involved in cell metabolism, the biosynthesis of small molecules, DNA and RNA demethylation, the hypoxic response and the formation of collagen. The reaction is catalyzed by a highly oxidizing ferryl-oxo species produced when the active site non-heme iron engages molecular oxygen. Enzyme activity is specifically stimulated by l-ascorbic acid (ascorbate, vitamin C), an effect not well mimicked by other reducing agents.
View Article and Find Full Text PDFOxygen-binding proteins aid oxygen diffusion to enhance fitness of a yeast model of multicellularity.
PLoS Biol
January 2025
School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, United States of America.
Oxygen availability is a key factor in the evolution of multicellularity, as larger and more sophisticated organisms often require mechanisms allowing efficient oxygen delivery to their tissues. One such mechanism is the presence of oxygen-binding proteins, such as globins and hemerythrins, which arose in the ancestor of bilaterian animals. Despite their importance, the precise mechanisms by which oxygen-binding proteins influenced the early stages of multicellular evolution under varying environmental oxygen levels are not yet clear.
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