() type 2 is an extremely important Gram-positive bacterial pathogen that can cause human or swine endocarditis, meningitis, bronchopneumonia, arthritis and sepsis. Catabolite control protein A (CcpA) is a major transcriptional regulator in type 2 that functions in catabolite control, specifically during growth on glucose or galactose. The regulation of central metabolism can affect the virulence of bacteria. In the present study, a metabolomics approach was used along with principal components analysis (PCA) and partial least-squares-discriminant analysis (PLS-DA) models and 37 metabolites were found that differed substantially between native and a mutant lacking CcpA. These results showed that CcpA is an important protein in type 2 for studying bacterial protein function.
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http://dx.doi.org/10.3892/br.2014.307 | DOI Listing |
Brain Res
January 2025
Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, Japan. Electronic address:
The brain is an organ that consumes a substantial amount of oxygen, and a reduction in oxygen concentration can rapidly lead to significant and irreversible brain injury. The progression of brain injury during hypoxia involves the depletion of intracellular adenosine triphosphate (ATP) due to decreased oxidative phosphorylation in the inner mitochondrial membrane. Allopurinol is a purine analog inhibitor of xanthine oxidoreductase that protects against hypoxic/ischemic brain injury; however, its underlying mechanism of action remains unclear.
View Article and Find Full Text PDFSurgery
December 2024
Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, NC; Department of Medicine (Endocrinology), Duke University School of Medicine, Durham, NC.
Objective: To characterize early physiologic stresses imposed by surgery by applying metabolomic analyses to deeply phenotype pre- and postoperative plasma and urine of patients undergoing elective surgical procedures.
Background: Patients experience perioperative stress through depletion of metabolic fuels. Bowel stasis or injury might allow more microbiome-derived uremic toxins to enter the blood, while the liver and kidney are simultaneously clearing analgesic and anesthetic drugs.
Gut Microbes
December 2025
Institute of Agri-Food Processing and Nutrition, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China.
Resveratrol (RSV), a natural polyphenol, has been suggested to influence glucose and lipid metabolism. However, the underlying molecular mechanism of its action remains largely unknown due to its multiple biological targets and low bioavailability. In this study, we demonstrate that RSV supplementation ameliorates high-fat-diet (HFD)-induced gut microbiota dysbiosis, enhancing the abundance of anti-obesity bacterial strains such as and .
View Article and Find Full Text PDFFEMS Microbiol Lett
December 2024
School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China.
Food Funct
December 2024
State Key Laboratory of Marine Food Processing &Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao, Shandong 266003, China.
This study utilized colonic fermentation to examine the impact of astaxanthin on the microbial catabolism of tryptophan. Astaxanthin significantly altered the gut microbiota and raised the tryptophan catabolism metabolite levels in an human colonic fermentation system. To eliminate the influence of substrate availability, we conducted colonic fermentation of the gut microbiota of astaxanthin-domesticated mice.
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