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21 Results Found

  • Article
  • Open Access
1 Citations
1,732 Views
11 Pages

Comparative Study of Blood Neopterin and Biopterins in Patients with COVID-19 and Secondary Bacterial Infection

  • Tomohiro Eguchi,
  • Shuhei Niiyama,
  • Chinatsu Kamikokuryo,
  • Yutaro Madokoro,
  • Kenshin Shimono,
  • Satoshi Hara,
  • Hiroshi Ichinose and
  • Yasuyuki Kakihana

26 July 2024

Background/Objectives: As COVID-19 can be severe, early predictive markers of both severity and onset of secondary bacterial infections are needed. This study first examined changes over time in the levels of plasma neopterin (NP) and biopterins (BPs...

(This article belongs to the Section Emergency Medicine)
  • Article
  • Open Access
13 Citations
3,038 Views
15 Pages

Associations of Biopterins and ADMA with Vascular Function in Peripheral Microcirculation from Patients with Chronic Kidney Disease

  • Samsul Arefin,
  • Lars Löfgren,
  • Peter Stenvinkel,
  • Anna B. Granqvist and
  • Karolina Kublickiene

We hypothesized that patients with chronic kidney disease (CKD) display an altered plasma amino acid (AA) metabolomic profile that could contribute to abnormal vascular maintenance of peripheral circulation in uremia. The relationships between plasma...

(This article belongs to the Special Issue Renal Dysfunction, Uremic Compounds, and Other Factors)
  • Article
  • Open Access
11 Citations
11,364 Views
11 Pages

22 January 2010

The aim of the presented study was to assess the effect of a single administration of Fe3+-dextran on immune cell counts and pterin biomolecule production as novel sensors of the piglets' immune system activation, and to determine concentrations of c...

(This article belongs to the Special Issue Tissue, Cell and Molecular Bioelectrochemistry - New Trends and Approaches)
  • Article
  • Open Access
4 Citations
1,303 Views
20 Pages

The Effect of Ultraviolet Light Irradiation on Pigment Performance in Microwave-Assisted Extraction of Arthrospira platensis

  • Anna Trubetskaya,
  • Roland Haseneder,
  • Maximilian Lippold,
  • Rob J. F. van Haren,
  • Volker Herdegen,
  • Lisa Ditscherlein,
  • James J. Leahy,
  • Italo Pisano,
  • Yvonne Joseph and
  • Jan Zuber
  • + 1 author

30 September 2025

Phycocyanin, a blue pigment from Arthrospira platensis, is widely used as a natural colorant in food products, but its application is limited by its sensitivity to light and temperature during extraction and storage. This study explored the impact of...

(This article belongs to the Section Marine Biotechnology Related to Drug Discovery or Production)
  • Article
  • Open Access
2 Citations
1,549 Views
11 Pages

23 July 2025

Nymphs of the ambar mutant of Orius laevigatus (Fieber) are orange-colored instead of the yellowish color of the wild-type individuals. Since there were no previous studies of the pigments of this species, we searched for differences in pigments of t...

(This article belongs to the Section Other Arthropods and General Topics)
  • Article
  • Open Access
10 Citations
3,345 Views
14 Pages

Effect of Remote Ischaemic Preconditioning on Perioperative Endothelial Dysfunction in Non-Cardiac Surgery: A Randomised Clinical Trial

  • Kirsten L. Wahlstrøm,
  • Hannah F. Hansen,
  • Madeline Kvist,
  • Jakob Burcharth,
  • Jens Lykkesfeldt,
  • Ismail Gögenur and
  • Sarah Ekeloef

16 March 2023

Endothelial dysfunction result from inflammation and excessive production of reactive oxygen species as part of the surgical stress response. Remote ischemic preconditioning (RIPC) potentially exerts anti-oxidative and anti-inflammatory properties, w...

(This article belongs to the Special Issue Cellular and Molecular Aspects of Tracking Endothelial Function for Clinical Diagnosis, Prognosis and Treatment)
  • Article
  • Open Access
8 Citations
6,673 Views
14 Pages

Vitamin C Deficiency Reduces Muscarinic Receptor Coronary Artery Vasoconstriction and Plasma Tetrahydrobiopterin Concentration in Guinea Pigs

  • Gry Freja Skovsted,
  • Pernille Tveden-Nyborg,
  • Maiken Marie Lindblad,
  • Stine Normann Hansen and
  • Jens Lykkesfeldt

3 July 2017

Vitamin C (vitC) deficiency is associated with increased cardiovascular disease risk, but its specific interplay with arteriolar function is unclear. This study investigates the effect of vitC deficiency in guinea pigs on plasma biopterin status and...

(This article belongs to the Special Issue Vitamin C in Health and Disease)
  • Article
  • Open Access
12 Citations
4,724 Views
28 Pages

Interaction between Butyrate and Tumor Necrosis Factor α in Primary Rat Colonocytes

  • Christopher L. Souders,
  • Juan J. Aristizabal-Henao,
  • Sarah J. Patuel,
  • John A. Bowden,
  • Jasenka Zubcevic and
  • Christopher J. Martyniuk

30 January 2023

Butyrate, a short-chain fatty acid, is utilized by the gut epithelium as energy and it improves the gut epithelial barrier. More recently, it has been associated with beneficial effects on immune and cardiovascular homeostasis. Conversely, tumor necr...

(This article belongs to the Section Natural and Bio-derived Molecules)
  • Article
  • Open Access
46 Citations
6,800 Views
16 Pages

The Nitric Oxide System in Peripheral Artery Disease: Connection with Oxidative Stress and Biopterins

  • Ahmed Ismaeel,
  • Evlampia Papoutsi,
  • Dimitrios Miserlis,
  • Ramon Lavado,
  • Gleb Haynatzki,
  • George P. Casale,
  • William T. Bohannon,
  • Robert S. Smith,
  • Jack Leigh Eidson and
  • Panagiotis Koutakis
  • + 8 authors

Peripheral artery disease (PAD) pathophysiology extends beyond hemodynamics to include other operating mechanisms, including endothelial dysfunction. Oxidative stress may be linked to endothelial dysfunction by reducing nitric oxide (NO) bioavailabil...

(This article belongs to the Special Issue Oxidative Stress and Inflammation in Cardiovascular Diseases)
  • Review
  • Open Access
9 Citations
3,841 Views
15 Pages

3 September 2019

We performed a systematic review of the literature to evaluate pterins as biomarkers of mechanical and impact-induced trauma. MEDLINE and Scopus were searched in March 2019. We included in vivo human studies that measured a pterin in response to mech...

(This article belongs to the Section Epidemiology & Public Health)
  • Case Report
  • Open Access
6 Citations
3,481 Views
6 Pages

DNAJC12-deficient hyperphenylalaninemia is a recently described inborn error of metabolism associated with hyperphenylalaninemia, neurotransmitter deficiency, and developmental delay caused by biallelic pathogenic variants of the DNAJC12 gene. The lo...

  • Article
  • Open Access
4 Citations
2,158 Views
14 Pages

Characteristics of Metabolites in the Development of Atherosclerosis in Tibetan Minipigs Determined Using Untargeted Metabolomics

  • Liye Shen,
  • Jinlong Wang,
  • Yongming Pan,
  • Junjie Huang,
  • Keyan Zhu,
  • Haiye Tu and
  • Minli Chen

18 October 2023

Background: Atherosclerosis (AS) is a chronic progressive disease caused by lipometabolic disorder. However, the pathological characteristics and mechanism of AS have not been fully clarified. Through high-fat and high-cholesterol diet induction, Tib...

(This article belongs to the Special Issue Dietary Factors on Cardiovascular and Endocrine Health)
  • Article
  • Open Access
22 Citations
4,902 Views
18 Pages

Acute liver failure (ALF) is associated with deregulated nitric oxide (NO) signaling in the brain, which is one of the key molecular abnormalities leading to the neuropsychiatric disorder called hepatic encephalopathy (HE). This study focuses on the...

(This article belongs to the Special Issue Molecular Research in Neurotoxicology 2.0)
  • Article
  • Open Access
20 Citations
6,616 Views
20 Pages

Genome Analysis of Endotrypanum and Porcisia spp., Closest Phylogenetic Relatives of Leishmania, Highlights the Role of Amastins in Shaping Pathogenicity

  • Amanda T. S. Albanaz,
  • Evgeny S. Gerasimov,
  • Jeffrey J. Shaw,
  • Jovana Sádlová,
  • Julius Lukeš,
  • Petr Volf,
  • Fred R. Opperdoes,
  • Alexei Y. Kostygov,
  • Anzhelika Butenko and
  • Vyacheslav Yurchenko

20 March 2021

While numerous genomes of Leishmania spp. have been sequenced and analyzed, an understanding of the evolutionary history of these organisms remains limited due to the unavailability of the sequence data for their closest known relatives, Endotrypanum...

(This article belongs to the Section Microbial Genetics and Genomics)
  • Article
  • Open Access
4,281 Views
11 Pages

Clinical Features of Families with a Novel Pathogenic Mutation in Sepiapterin Reductase

  • Feda E. Mohamed,
  • Lara Alzyoud,
  • Mohammad A. Ghattas,
  • Mohammed Tabouni,
  • André Fienemann,
  • Joanne Trinh,
  • Ibrahim Baydoun,
  • Praseetha Kizhakkedath,
  • Hiba Alblooshi and
  • Fatma Al-Jasmi
  • + 4 authors

Sepiapterin Reductase Deficiency (SRD) is a rare inherited neurometabolic disorder caused by variants in the SPR gene, which may lead to developmental delays, psychomotor retardation, and cognitive impairments. Two consanguineous North African and Mi...

(This article belongs to the Special Issue Molecular Research of Dystonia and Parkinson’s Disease)
  • Article
  • Open Access
6 Citations
1,632 Views
12 Pages

Metabolic Disruptions and Non-Communicable Disease Risks Associated with Long-Term Particulate Matter Exposure in Northern Thailand: An NMR-Based Metabolomics Study

  • Churdsak Jaikang,
  • Giatgong Konguthaithip,
  • Yutti Amornlertwatana,
  • Narongchai Autsavapromporn,
  • Sirichet Rattanachitthawat,
  • Nitip Liampongsabuddhi and
  • Tawachai Monum

Background/Objectives: Particulate matter (PM) is a primary health hazard associated with metabolic pathway disruption. Population characteristics, topography, sources, and PM components contribute to health impacts. Methods: In this study, NMR-based...

(This article belongs to the Section Endocrinology and Metabolism Research)
  • Article
  • Open Access
1,550 Views
31 Pages

Cerebrospinal Fluid Neurotransmitters, Pterins, Folates and Amino Acids in Paediatric Onset Epilepsies: A Tertiary Centre Retrospective Cohort Study

  • Mario Mastrangelo,
  • Claudia Carducci,
  • Filippo Manti,
  • Giacomina Ricciardi,
  • Rossella Bove,
  • Francesco Pisani and
  • Vincenzo Leuzzi

9 November 2025

Objectives: To investigate the clinical value of cerebrospinal fluid (CSF) testing for biogenic amine, pterins, amino acids, and folates in paediatric onset epilepsies. Methods: Retrospective clinical and biochemical phenotyping of patients with epil...

(This article belongs to the Section Pediatric Neurology & Neurodevelopmental Disorders)
  • Article
  • Open Access
5 Citations
4,561 Views
20 Pages

Metastatic Melanoma Progression Is Associated with Endothelial Nitric Oxide Synthase Uncoupling Induced by Loss of eNOS:BH4 Stoichiometry

  • Fabiana Henriques Machado de Melo,
  • Diego Assis Gonçalves,
  • Ricardo Xisto de Sousa,
  • Marcelo Yudi Icimoto,
  • Denise de Castro Fernandes,
  • Francisco R. M. Laurindo and
  • Miriam Galvonas Jasiulionis

3 September 2021

Melanoma is the most aggressive type of skin cancer due to its high capability of developing metastasis and acquiring chemoresistance. Altered redox homeostasis induced by increased reactive oxygen species is associated with melanomagenesis through m...

(This article belongs to the Special Issue Nitric Oxide Synthases: Regulation and Function 2021)
  • Article
  • Open Access
15 Citations
3,694 Views
13 Pages

Metabonomic Insights into the Sperm Activation Mechanisms in Ricefield Eel (Monopterus albus)

  • Huiying Zhang,
  • Yang Liu,
  • Lingling Zhou,
  • Shaohua Xu,
  • Cheng Ye,
  • Haifeng Tian,
  • Zhong Li and
  • Guangfu Hu

26 October 2020

In fish, sperm motility activation is one of the most essential procedures for fertilization. Previous studies have mainly focused on the external environmental effects and intracellular signals in sperm activation; however, little is known about the...

(This article belongs to the Special Issue Genetic and Genomic Regulation of Ovarian and Testicular Functions in Animals)
  • Article
  • Open Access
14 Citations
3,405 Views
21 Pages

Persistent Metabolic Changes Are Induced by 24 h Low-Dose Lead (Pb) Exposure in Zebrafish Embryos

  • Gwendolyn Cooper,
  • Ryan North,
  • Tyler Hunt-Smith,
  • James Larson,
  • Madison Rennie,
  • Marguerite L. Bailey,
  • Suzanne Scarlata,
  • Christa S. Merzdorf and
  • Brian Bothner

26 January 2025

Lead (Pb) is a heavy metal associated with a range of toxic effects. Relatively few studies attempt to understand the impact of lead on development from a mechanistic perspective. Danio rerio (zebrafish) embryos are a model organism for studying the...

(This article belongs to the Section Molecular Toxicology)
  • Article
  • Open Access
873 Views
13 Pages

Extraction pH Controls Assessed Biotoxicity of Chlorination Disinfection Byproducts from Amphoteric Precursors

  • Yanting Zuo,
  • Senqi Xu,
  • Zheng Wang,
  • Jinhu Zuo,
  • Hui Fei,
  • Haolin Liu,
  • Chenglu Bi,
  • Guofen Rui and
  • Shi Cheng

20 October 2025

Effect-based toxicity assessments are crucial for evaluating the risks of disinfection byproducts (DBPs), particularly unknown species, generated during drinking water chlorination. However, the accuracy of this approach is highly dependent on unbias...

(This article belongs to the Section Biological Processes and Systems)