Alterations in the concentration of nitric oxide (NO) and L-arginine metabolites have been associated with the pathophysiology of different vascular diseases. Here, we describe striking changes in L-arginine metabolism after hemorrhagic stroke. Blood and cerebrospinal fluid (CSF) samples of patients with intracerebral hemorrhage (ICH) and/or intraventricular hemorrhage were collected over a ten-day period. Liquid chromatography-tandem mass spectrometry was used to quantify key substrates and products of L-arginine metabolizing enzymes as well as asymmetric (ADMA) and symmetric dimethylarginine (SDMA). Changes in the plasma were limited to early reductions in L-ornithine, L-lysine, and L-citrulline concentrations. Intrathecally, we observed signs of early NO synthase (NOS) upregulation followed by a decrease back to baseline accompanied by a rise in the level of its endogenous NOS-inhibitor ADMA. SDMA demonstrated increased levels throughout the observation period. For arginase, a pattern of persistently elevated activity was measured and arginine:glycine amidinotransferase (AGAT) appeared to be reduced in its activity at later time points. An early reduction in CSF L-arginine concentration was an independent risk factor for poor outcome. Together, these findings further elucidate pathophysiological mechanisms after ICH potentially involved in secondary brain injury and may reveal novel therapeutic targets.
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http://dx.doi.org/10.1177/0271678X20983216 | DOI Listing |
J Oral Facial Pain Headache
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Department of Cardiology, Xinjiang Medical University Affiliated Traditional Chinese Medicine Hospital, 830001 Urumqi, Xinjiang Uyghur Autonomous Region, China.
This study aimed to investigate the metabolic mechanisms underlying the combination of patent foramen ovale (PFO) and migraine by assessing metabolite expression before and after interventional occlusion surgery. The study included 11 PFO patients from the Heart Center of Xinjiang Medical University Affiliated Hospital of Traditional Chinese Medicine, who underwent transcatheter PFO intervention and occlusion surgery between January 2018 and February 2023, and 11 healthy controls. Blood samples were collected pre-surgery, 3 days post-surgery, and 30 days post-surgery for metabolomics analysis.
View Article and Find Full Text PDFBMC Biol
January 2025
Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy.
Background: Deformed wing virus (DWV) is a major honey bee pathogen that is actively transmitted by the parasitic mite Varroa destructor and plays a primary role in Apis mellifera winter colony losses. Despite intense investigation on this pollinator, which has a unique environmental and economic importance, the mechanisms underlying the molecular interactions between DWV and honey bees are still poorly understood. Here, we report on a group of honey bee proteins, identified by mass spectrometry, that specifically co-immunoprecipitate with DWV virus particles.
View Article and Find Full Text PDFJ Cell Mol Med
January 2025
Department of Nephrology, Yi Ji Shan Hospital Affiliated to Wan Nan Medical College, Wuhu, Anhui, China.
Renal fibrosis (RF) is a crucial pathological factor in the progression of chronic kidney disease (CKD) to end-stage renal failure, and accurate and noninvasive assays to monitor the progression of renal fibrosis are needed. Circular RNAs (circRNAs) are noncoding RNAs that can be used as diagnostic biomarkers and therapeutic targets for human diseases. In this study, we analysed the expression of hsa_circ_0008925 in human urinary renal tubular cells and investigated its role in renal fibrosis.
View Article and Find Full Text PDFPoult Sci
January 2025
College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266000, China; Department of Biology and Agriculture, Zunyi Normal College, Ping`an Avenue, Hong Huagang District, Zunyi 563006, China.
Preslaughter stress induced a negative energy balance of broilers, resulted in an accelerated glycolysis and finally led to an inferior meat quality. The present study aimed to investigate the effects of creatine monohydrate (CMH) supplementation on muscle energy storage, antioxidant capacity, the glycolysis of postmortem muscle and the metabolite profiles in muscle of broilers subjected to preslaughter transport. Two hundred and forty broilers were chosen and randomly allocated into three treatments (group A, group B and group C), comprising 8 replicates (10 broilers each replicate).
View Article and Find Full Text PDFNutrients
December 2024
Departamento Fisiología, Facultad Medicina, Instituto Murciano de Investigación Biosanitaria, Universidad de Murcia, 30120 Murcia, Spain.
Introduction: Numerous epidemiological studies have demonstrated that consuming foods rich in polyphenols and flavonoids can have beneficial effects on various diseases, including arterial hypertension (HTN). Recent research from our laboratory has shown that certain flavonoids exhibit antihypertensive properties in several animal models of HTN. Our objective was to evaluate the effect of L.
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