Unlabelled: Marginal vitamin C (ascorbic acid) deficiency is a prevalent yet underappreciated risk factor for cardiovascular disease. Along with glutathione, ascorbate plays important roles in antioxidant defense and redox signaling. Production of nitric oxide (NO) and reactive oxygen species and their interaction, giving rise to nitroso and nitrosyl product formation, are key components of the redox regulation/signaling network. Numerous in vitro studies have demonstrated that these systems are interconnected via multiple chemical transformation reactions, but little is known about their dynamics and significance in vivo.
Aims: We sought to investigate the time-course of changes in NO/redox status and vascular function during ascorbate depletion in rats unable to synthesize vitamin C.
Results: We here show that both redox and protein nitros(yl)ation status in blood and vital organs vary dynamically during development of ascorbate deficiency. Prolonged marginal ascorbate deficiency is associated with cell/tissue-specific perturbations in ascorbate and glutathione redox and NO status. Scurvy develops earlier in marginally deficient compared to adequately supplemented animals, with blunted compensatory NO production and a dissociation of biochemistry from clinical symptomology in the former. Paradoxically, aortic endothelial reactivity is enhanced rather than impaired, irrespective of ascorbate status. Innovation/Conclusion: Enhanced NO production and protein nitros(yl)ation are integral responses to the redox stress of acute ascorbate deprivation. The elevated cardiovascular risk in marginal ascorbate deficiency is likely to be associated with perturbations of NO/redox-sensitive signaling nodes unrelated to the regulation of vascular tone. This new model may have merit for the future study of redox-sensitive events in marginal ascorbate deficiency.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3411334 | PMC |
| http://dx.doi.org/10.1089/ars.2011.4201 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unlocking the Vitamin Puzzle: Investigating Levels in People With Alzheimer's Disease Versus Healthy Controls Through Systematic Review and Network Meta-Analysis.
J Hum Nutr Diet
February 2025
Department of Biostatistics and Medical Informatics, University College of Medical Sciences, Delhi, India.
The progression of Alzheimer's disease (AD) is intricately tied to the impairment of neurons, crucial for neurological functions. Despite extensive research, the precise mechanism underlying AD development remains elusive due to its multifaceted aetiology. Vitamin deficiency has emerged as a notable contributor to AD onset and progression, exerting a significant influence on brain function.
View Article and Find Full Text PDFAugmenting phyto-chemical and phyto-mineral profiling of moringa leaf extract: A contrastive study of solid-liquid extraction methodologies.
Heliyon
December 2024
Department of Biomedical Sciences, Institute of Health, Jimma University, Ethiopia.
Article Synopsis
- The global food system faces significant issues related to malnutrition, with many people affected by undernourishment and unhealthy diets.
- Advanced extraction methods, such as ultrasound-assisted extraction (UAE) and microwave-assisted extraction (MAE), were tested on moringa leaves, showing higher recovery yields and greater levels of phytochemicals compared to traditional methods.
- The findings indicate that these novel extraction techniques can effectively boost the quality and quantity of beneficial bioactive compounds, potentially improving nutrient availability from plant sources.
Oral Manifestations of Vitamin C Deficiency in a Toddler.
J Dent Child (Chic)
September 2024
Department of Pediatric Hematology and Oncology, University of Illinois Chicago, Chicago, Ill., USA.
Vitamin C deficiency, colloquially known as scurvy, has become rare in modern times due to the widespread availability of ascorbic acid-rich foods. Despite this, it continues to be a concern in certain at-risk populations. The purpose of this report is to describe the case of a two-year-old girl who initially presented to a pediatric dental clinic with the chief complaint of hypertrophic gingiva and bleeding.
View Article and Find Full Text PDFThe relationship between serum vitamin C levels and high-sensitivity C-reactive protein in children.
Sci Rep
December 2024
Department of Clinical Laboratory, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou Key Laboratory of Children's Infection and Immunity, Zhengzhou, 450000, P. R. China.
The relationship between vitamin C nutritional status and inflammation has garnered increasing attention, but studies in younger populations are limited. This study aimed to investigate the association between serum vitamin C and high-sensitivity C-reactive protein (hs-CRP) levels in children and adolescents. A cross-sectional analysis was conducted using data from the National Health and Nutrition Examination Survey (NHANES).
View Article and Find Full Text PDFScurvy in an 18-month-old child mimicking a clinical presentation of rickets.
Arch Pediatr
December 2024
General Pediatric Department, Versailles hospital, Le Chesnay, France.
Scurvy is now considered to be a rare disease in European countries, even among children, but it still exists. We report the case of an 18-month-old boy who was initially hospitalized for a walking disorder and ultimately diagnosed with scurvy. Radiographs were compatible with rickets, but biological analysis ruled out this diagnosis.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!