Assessment of the antioxidant activity of vitamins and other compounds is of interest in the understanding of their in vivo effects. In this study, we have investigated the activity of several lipid and water-soluble vitamins in human whole blood. Measurements were carried out using a biological test that enables the evaluation of both red blood cells and plasma resistance against free radical activity induced by 2,2'-azobis (2-amidinopropane)hydrochloride (AAPH). Antioxidant activity of vitamins has been determined by using the biological test versus chemical methods (chemiluminescence, DMPD radical). We have observed strong anti-oxidant potentials for vitamins B6 and B9 with biological tests, but not with chemical methods. At 10 microM, the vitamin B9 efficiency in inhibiting radical-induced red blood cell hemolysis was almost three times higher than vitamin C efficiency and two times higher than alpha-tocopherol efficiency. Antioxidant activity was not observed for vitamins B1 or B2, nor for retinol. The weak activity of beta-carotene still remains to be investigated particularly in relation to oxygen pressure. Our study demonstrated that the biological test is more useful than the chemical methods employed in this instance, for the evaluation of antioxidant capacity of lipophilic and putatively biologically active compounds.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1024/0300-9831.75.1.11 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rhythmic Exercises Before Basketball Training: A Study on Motor Skills, Static Balance, and Reaction Speed in School-Aged Children.
J Strength Cond Res
December 2024
Department of Human Sciences and Promotion of the Quality of Life, San Raffaele Rome Open University, Rome, Italy; and.
Racil, G, Padulo, J, Trabelsi, Y, Frizziero, A, Russo, L, and Migliaccio, GM. Rhythmic exercises before basketball training: A study on motor skills, static balance, and reaction speed in school-aged children. J Strength Cond Res 38(12): e761-e768, 2024-The aim of this study was to investigate the effects of combining rhythmic exercises with basketball training on the improvement of basic motor and physical skills in children.
View Article and Find Full Text PDFVariations in the TP53 and KRAS genes indicate a particularly adverse prognosis in relapsed pediatric T-ALL. We hypothesized that these variations might be subclonally present at disease onset and contribute to relapse risk. To test this, we examined two cohorts of children diagnosed with T-ALL: one with 81 patients who relapsed and 79 matched non-relapsing controls, and another with 226 consecutive patients, 30 of whom relapsed.
View Article and Find Full Text PDFApplication of Artificial Intelligence for quantifying Plasmodium berghei in blood samples from infected mice.
J Vector Borne Dis
October 2024
Department of Biological Sciences, King AbdulAziz University, Jeddah, Makkah, Saudi Arabia.
Background Objectives: In malaria infection, quantifying blood parasitemia is a critical step for evaluating the severity of the disease. This has generally been conducted manually, and thus, its accuracy depends on the expertise of technicians. There is an urgent need for an automated technique to overcome manual errors.
View Article and Find Full Text PDFValidation of Clinical Dynamic Contrast-Enhanced Magnetic Resonance Imaging Perfusion Modeling and Neoadjuvant Chemotherapy Response Prediction in Breast Cancer Using FDG and Cu-DOTA-Trastuzumab Positron Emission Tomography Studies.
JCO Clin Cancer Inform
January 2025
SimBioSys Inc, Chicago, IL.
Purpose: Perfusion modeling presents significant opportunities for imaging biomarker development in breast cancer but has historically been held back by the need for data beyond the clinical standard of care (SoC) and uncertainty in the interpretability of results. We aimed to design a perfusion model applicable to breast cancer SoC dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) series with results stable to low temporal resolution imaging, comparable with published results using full-resolution DCE-MRI, and correlative with orthogonal imaging modalities indicative of biophysical markers.
Methods: Subsampled high-temporal-resolution DCE-MRI series were run through our perfusion model and resulting fits were compared for consistency.
Quantitative Measurement of Molecular Permeability to a Synthetic Bacterial Microcompartment Shell System.
ACS Synth Biol
January 2025
Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94702, United States.
Naturally evolved and synthetically designed forms of compartmentalization benefit encapsulated function by increasing local concentrations of substrates and protecting cargo from destabilizing environments and inhibitors. Crucial to understanding the fundamental principles of compartmentalization are experimental systems enabling the measurement of the permeability rates of small molecules. Here, we report the experimental measurement of the small-molecule permeability of a 40 nm icosahedral bacterial microcompartment shell.
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!