Oxygen-dependent processes in peripheral blood monocytes were intensified in patients with metabolic cardiovascular syndrome. This was manifested in increased production of O(2)(*-) and NO. Among metabolic factors (cholesterol, low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, triacylglycerols, glucose, etc.), products of glycosylation (fructosamine) and plasma triacylglycerols were most potent in modulating generation of O(2)(*-) and NO by monocytes.
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http://dx.doi.org/10.1023/b:bebm.0000038145.39332.85 | DOI Listing |
J Biol Eng
January 2025
Department of Bioprocess Engineering, Institute of Food Science and Biotechnology, University of Hohenheim, Fruwirthstr. 12, 70599, Stuttgart, Germany.
Background: In biomanufacturing of surface-active agents, such as rhamnolipids, excessive foaming is a significant obstacle for the development of high-performing bioprocesses. The exploitation of the inherent tolerance of Pseudomonas putida KT2440, an obligate aerobic bacterium, to microaerobic conditions has received little attention so far. Here low-oxygen inducible promoters were characterized in biosensor strains and exploited for process control under reduction of foam formation by low aeration and stirring rates during biosynthesis of rhamnolipids.
View Article and Find Full Text PDFComp Biochem Physiol A Mol Integr Physiol
January 2025
Department of Biology, University of Ottawa, K1N6N5, 20 Marie Curie, Ottawa, ON, Canada. Electronic address:
The occurrence of environmental hypoxia in freshwater and marine aquatic systems has increased over the last century and is predicted to further increase with climate change. As members of the largest extant vertebrate group, freshwater fishes, and to a much lesser extent marine fishes, are vulnerable to increased occurrence of hypoxia. This is important as fishes render important ecosystem services and have important cultural and economic roles.
View Article and Find Full Text PDFPlants (Basel)
December 2024
Institute of Basic Biological Problems of the Russian Academy of Sciences, Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", 142290 Pushchino, Russia.
The redox state of the plastoquinone (PQ) pool in thylakoids plays an important role in the regulation of chloroplast metabolism. In the light, the PQ pool is mostly reduced, followed by oxidation after light cessation. It has been believed for a long time that dark oxidation depends on oxygen, although the precise mechanisms of the process are still unknown and debated.
View Article and Find Full Text PDFbioRxiv
December 2024
Department of Biochemistry, Molecular Biology and Biophysics, the University of Minnesota at Twin Cities, Minneapolis, MN 55455, USA.
Prolyl Hydroxylase Domain protein 2 (PHD2) targets Hypoxia Inducible Factor alpha subunits (HIFα) for oxygen-dependent proline hydroxylation that leads to subsequent ubiquitination and degradation of HIFα. In addition to HIF proteins, growing evidence suggested that PHD2 may exert its multifaceted function through hydroxylase-dependent or independent activities. Given the critical role of PHD2 in diverse biological processes, it is important to comprehensively identify potential PHD2 interacting proteins.
View Article and Find Full Text PDFFree Radic Biol Med
December 2024
Department of Internal Medicine, Division of Cardiovascular Medicine, and the EPR Center, Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, OH, 43210, USA. Electronic address:
Cytoglobin (Cygb) regulates vascular tone by modulating nitric oxide (NO) metabolism in vascular smooth muscle cells (VSMCs). In the presence of its cytochrome B5a (B5)/B5 reductase-isoform-3 (B5R) reducing system, Cygb controls NO metabolism via oxygen-dependent NO dioxygenation. Electronic cigarette (EC) use has been shown to induce vascular dysfunction and decrease NO bioavailability; however, the role of Cygb-mediated NO metabolism in the pathophysiology of this process has not been previously investigated.
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