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Oryza sativa L. (rice) is an important staple crop across the world. In the previous study, we identified 36 specialized (secondary) metabolites including 28 flavonoids. In the present study, a metabolome analysis using liquid chromatography-mass spectrometry was conducted on the leaf, bran, and brown and polished rice grains to better understand the distribution of these metabolites. Principal component analysis using the metabolome data clearly characterized the accumulation patterns of the metabolites. Flavonoids, e.g., tricin, tricin 7-O-rutinoside, and tricin 7-O-β-D-glucopyranoside, were mainly present in the leaf and bran but not in the polished grain. In addition, anti-inflammatory and anti-oxidant activity of the metabolites were assayed in vitro. Tricin 4'-O-(erythro-β-guaiacylglyceryl)ether and isoscoparin 2″-O-(6‴-(E)-feruloyl)-glucopyranoside showed the strongest activity for inhibiting nitric oxide (NO) production and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging, respectively.
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http://dx.doi.org/10.1248/cpb.c16-00180 | DOI Listing |
J Clin Invest
September 2025
Division of Infectious Diseases, Department of Medicine, Brigham and Women's Hospital, Boston, United States of America.
B-lymphocytes play major adaptive immune roles, producing antibody and driving T-cell responses. However, how immunometabolism networks support B-cell activation and differentiation in response to distinct receptor stimuli remains incompletely understood. To gain insights, we systematically investigated acute primary human B-cell transcriptional, translational and metabolomic responses to B-cell receptor (BCR), Toll-like receptor 9 (TLR9), CD40-ligand (CD40L), interleukin-4 (IL4) or combinations thereof.
View Article and Find Full Text PDFMetabolomics
September 2025
Laboratoire de Biochimie et Biologie Moléculaire, Centre Hospitalier Universitaire, Angers, France.
Introduction: The definition of Leber's hereditary optic neuropathy (LHON) does not take into account a preclinical phase during which the thickness of retinal nerve fiber layer (RNFL) is increased, prior to optic nerve atrophy, reducing the chances of visual recovery.
Objectives: Search for a metabolomic signature characterizing this preclinical phase and identify biomarkers predicting the risk of LHON onset.
Methods And Results: The blood and tear metabolomic profiles of 90 asymptomatic LHON mutation carriers followed for one year will be explored as a function of RNFL thickness and compared to those of a healthy control.
Metabolomics
September 2025
Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QU, UK.
Introduction: Knockout of the Fmo5 gene in mice led to a lean, slow-ageing phenotype characterised by the presence of 2,3-butanediol isomers in their urine and plasma. Oral treatment of wildtype mice with 2,3-butanediol led to a low cholesterol, low epididymal fat phenotype.
Objectives: Determine if significant, heterozygous coding variations in human FMO5 would give rise to similar clinical and metabolic phenotypes in humans, as in C57BL/6J mice with knockout of the Fmo5 gene and in particular, increased excretion of 2,3-butanediol.
Orthod Craniofac Res
September 2025
Department of Orthodontics, College of Dentistry, University of Florida, Gainesville, Florida, USA.
Objective(s): In this pilot study, exosomes from saliva were isolated and tested for the presence of metabolomic biomarkers for physiological external root resorption and/or pathological alveolar bone resorption.
Settings And Sample Population: Saliva samples of 20 individuals in the mixed dentition stage of dental development.
Materials And Methods: Saliva was obtained from healthy control children with resorbing primary teeth or children with localised aggressive periodontitis (LAP) showing alveolar bone loss but little root resorption.
Analyst
September 2025
Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing, China.
: Postmenopausal conditions can lead to metabolic disorders such as obesity and steatosis. (PT), a prominent traditional Chinese medicine, exerts potential therapeutic effects against hepatic injury. Nevertheless, the extent to which PT ameliorates liver damage resulting from estrogen deficiency, along with the associated mechanisms, remains poorly understood.
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