This study investigated the effects of the oxygen free radical scavengers superoxide dismutase and catalase, the peroxide ion inhibitor, in crystalloid potassium cardioplegic solution on infarct size and global and regional myocardial function after occlusion of the left anterior descending artery and surgical reperfusion in young sheep on cardiopulmonary bypass. After 1 hour of occlusion, the animals were randomized to receive either routine potassium cardioplegia or cardioplegia with superoxide dismutase and catalase. Global hemodynamics measured by maximum rate of pressure rise showed significant improvement after 5 hours of reperfusion in the group treated with superoxide dismutase and catalase (1843 +/- 163 versus 979 +/- 191, p less than 0.001). Regional myocardial function was measured by ultrasonic crystals implanted in the ischemic area and in a nonischemic control segment. The percent systolic shortening or bulging was calculated. At end of reperfusion in the animals treated with superoxide dismutase and catalase, there was active shortening in the ischemic area after reperfusion of +9.2% +/- 0.4% versus 2.1% +/- 0.8% in untreated animals (p less than 0.001). Infarct size measured by triphenyltetrazolium chloride staining showed significant difference (p less than 0.001) between animals treated with superoxide dismutase and catalase (0.9% +/- 0.1%) and control animals (61% +/- 70%). Superoxide dismutase and catalase given in the cardioplegic solution before reperfusion of an acutely ischemic area of myocardium enhances recovery of contractile function and results in a significant reduction in infarct size, which suggests improved salvage of the ischemic myocardium.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Anti-Inflammatory and Antioxidant Effects of Aqueous Extract on the Liver and Kidney of PCOS Mice.
J Evid Based Integr Med
January 2025
Department of Biological Sciences, Faculty of Science, Beirut Arab University, Beirut, Lebanon.
Background: Polycystic Ovarian Syndrome (PCOS) is an endocrine disorder associated with increased risk of kidney and liver damage. Current treatments have shown contradictory outcomes, and their long-term use causes unwanted side effects. could serve as a complementary medicine to current PCOS treatments.
View Article and Find Full Text PDFPhotodynamic therapy with a novel photosensitizer inhibits DSS-induced ulcerative colitis in rats via the NF-κB signaling pathway.
Front Pharmacol
January 2025
Tianjin Key Laboratory of Biomedical Material, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin, China.
Introduction: Ulcerative colitis (UC) is an inflammatory bowel disease characterized by inflammation and ulceration of the digestive tract.
Methods: Photodynamic therapy (PDT) with a novel photosensitizer LD was used to treat UC rat models to explore the therapeutic effect and mechanism of LD-PDT on UC. 16S ribosomal RNA was used to detect the composition of Gut microbiota.
Tofersen and other antisense oligonucleotides in ALS.
Ther Adv Neurol Disord
January 2025
Department of Neurology, Ulm University, Ulm, Germany.
The advent of antisense oligonucleotide (ASO) therapies in neurodegenerative disorders is associated with enormous hope. Nusinersen treatment was a breakthrough intervention in the recessive disease spinal muscular atrophy, and superoxide dismutase 1 (SOD1) amyotrophic lateral sclerosis (ALS) seems to be the paradigm disease in dominant degenerative diseases. The results of treatment with the ASO tofersen in SOD1-ALS show that the drug has a convincing beneficial effect on ALS caused by SOD1 mutations, that preclinical studies in rodents predicted the therapeutic effect in the human disease, and that clinical efficacy is associated with a specific sequence of effects of the drug on mechanistic and degenerative biomarkers and, subsequently, functional outcomes such as weight stabilization and ALSFRS-R.
View Article and Find Full Text PDFdeficiency in mouse oocytes during in vitro maturation increases chromosome segregation errors with a reduced BUBR1 at kinetochore.
Reprod Med Biol
January 2025
Laboratory of Animal Reproduction, Graduate School of Agricultural Sciences Yamagata University Tsuruoka Japan.
Purpose: This study aimed to investigate the molecular mechanisms associated with chromosome segregation errors caused by intrinsic oxidative stress during in vitro oocyte maturation (IVM) using oocytes from -deficient (KO) mice.
Methods: Ovulated or in vitro matured cumulus-cells oocyte complexes (COCs) were collected from wild-type (WT) and KO mice and evaluated chromosome alignment, chromosome segregation, meiotic progression, and BUBR1 and REC8 protein expression levels.
Results: In 21% O IVM, the KO had significantly higher frequencies of chromosome misalignment and segregation errors compared to the WT, and they also reached Germinal Vesicle Break Down (GVBD) and M I stages peak earlier and showed a shorter M I stage residence time compared to the WT.
Genotypic variability in stress responses of Sorghum bicolor under drought and salinity conditions.
Front Genet
January 2025
Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
Introduction: Sorghum bicolor: widely cultivated in Asia and Africa, faces increasing challenges from climate change, specifically from abiotic stresses like drought and salinity. This study evaluates how different sorghum genotypes respond to separate and combined stresses of drought and salinity.
Methods: Carried out with three replications using a randomized complete block design, the experiment measured biochemical and physiological parameters, including stomatal conductance, chlorophyll content, and antioxidant enzyme activities.
Want 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!