Background: Chronic intermittent hypoxia (CIH), an important basis of the pathogenesis of organ damage induced by obstructive sleep apnea syndrome (OSAS), is associated with myocardial injury, such as left ventricular dysfunction, apoptosis, and oxidative stress. Endogenous hydrogen sulfide (HS) plays an important role in maintaining cardiovascular functions. Many studies have demonstrated that exogenous HS has protective effects against myocardial injury induced by various cardiovascular diseases, and inhibiting the generation of endogenous HS has opposite effects. However, the effect of DL-propargylglycine (PAG), an effective inhibitor of cystathionine γ-lyase (CSE)-synthesized HS, on the regulation myocardial injury remains controversial.
Purpose: The present study was aimed to explore the influence of PAG on myocardial injury induced in rats by CIH.
Methods: Sprague-Dawley rats were randomly divided into a normal control (NC) group, a CIH group, a NC + PAG group, and a CIH + PAG group. After establishing the CIH model in rats, blood pressure, left ventricular function, oxidative stress, apoptosis, and the level of endoplasmic reticulum (ER) stress were detected.
Results: In NC rats, PAG had no effect on blood pressure, but induced myocardial dysfunction and up-regulated oxidative stress and apoptosis of the myocardium. In the CIH + PAG group, pretreatment with PAG significantly reduced blood pressure and improved the left ventricular ejection fraction (LVEF) and the left ventricular fractional shortening (LVFS) compared to the CIH group. Significantly lower levels of oxidative stress, apoptosis, and the ER stress were detected in the CIH + PAG group than in the CIH group.
Conclusion: These results suggest that PAG can protect the myocardium against CIH-induced injury through inhibition of endoplasmic reticulum stress.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11325-018-1656-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Understanding the impact of racism on surgical outcomes in settler nation-states USA and Canada: a protocol for a systematic review and meta-analysis.
BMJ Open
January 2025
Department of Surgery, Alberta Health Services, Calgary, Alberta, Canada.
Introduction: To improve surgical quality and safety, health systems must prioritise equitable care for surgical patients. Racialised patients experience worse postoperative outcomes when compared with non-racialised surgical patients in settler colonial nation-states. Identifying preventable adverse outcomes for equity-deserving patient populations is an important starting point to begin to address these gaps in care.
View Article and Find Full Text PDFThe influence of microplastics on hypertension-associated cardiovascular injury via the modulation of gut microbiota.
Environ Pollut
January 2025
Heart Center and Beijing Key Laboratory of Hypertension, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China; Department of Cardiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China. Electronic address:
Microplastics (MPs) have been found to interfere with the gut microbiota and compromise the integrity of the gut barrier. Excessive exposure to MPs markedly elevates the risk of cardiovascular disease, yet their influence on hypertension remains elusive, calling for investigation into their potential impacts on blood pressure (BP) regulation. In the present study, an increase in the concentration of MPs was observed in the fecal samples of individuals suffering from hypertension, as compared to the controls.
View Article and Find Full Text PDFDioscin pretreatment ameliorates ferroptosis in cardiomyocytes after myocardial infarction via inhibiting endoplasmic reticulum stress.
Mol Med
January 2025
The First People's Hospital of Lin'an District, No. 360, Yikang Street, Jinnan Subdistrict, Lin'an District, Hangzhou, Zhejiang, 311300, China.
Background: Myocardial infarction (MI) remains a leading cause of mortality globally, often resulting in irreversible damage to cardiomyocytes. Ferroptosis, a recently identified form of regulated cell death driven by iron-dependent lipid peroxidation, has emerged as a significant contributor to post-MI cardiac injury. The endoplasmic reticulum (ER) stress response has been implicated in exacerbating ferroptosis.
View Article and Find Full Text PDFMitigation of ischemia/reperfusion injury via selenium nanoparticles: Suppression of STAT1 to inhibit cardiomyocyte oxidative stress and inflammation.
Biomaterials
January 2025
Chongqing Key Laboratory of Reproductive Health and Digital Medicine, Department of Laboratory Medicine, Chongqing General Hospital, School of Medicine, Chongqing University, Chongqing, 400044, People's Republic of China; College of Life Science and Laboratory Medicine, Kunming Medical University, Kunming, Yunnan, 650050, People's Republic of China. Electronic address:
Ischemia/reperfusion injury (I/RI) following myocardial infarction, a leading cause of global morbidity and mortality, is characterized by detrimental oxidative stress and inflammation. In response, we proposed an I/RI alleviation strategy using the intravenous injection of spherical selenium nanoparticles (SeNPs) synthesized by a template method. Single-cell sequencing revealed these proposed SeNPs exhibited exceptional antioxidant and anti-inflammatory properties, disrupting the STAT1-ROS cycle, therefore preserving mitochondrial respiration and inhibiting caspase-mediated cardiomyocyte apoptosis.
View Article and Find Full Text PDFShuxuening injection improves myocardial injury after myocardial infarction by regulating macrophage polarization via the TLR4/NF-κB and PI3K/Akt signaling pathways.
Phytomedicine
January 2025
Department of Pharmacy, the First Affiliated Hospital of Henan University of Chinese Medicine, Henan Zhengzhou, 450003, China; Henan Province Engineering Research Center for Clinical Application, Evaluation and Transformation of Traditional Chinese Medicine, Henan Provincial Key Laboratory for Clinical Pharmacy of Traditional Chinese Medicine, Henan Province Engineering Research Center of Safety Evaluation and Risk Management of Traditional Chinese Medicine, Zhengzhou 450003, Henan, China; School of Pharmacy, Henan University of Chinese Medicine, Henan Zhengzhou 450046, China. Electronic address:
Background: Macrophage activation and polarization play pivotal roles in the inflammatory response and myocardial injury associated with myocardial infarction (MI). Modulating macrophage polarization from the pro-inflammatory M1 phenotype to the anti-inflammatory M2 phenotype is a promising therapeutic approach for MI. Shuxuening injection (SXNI) is extensively utilized in clinical settings for MI treatment and has demonstrated therapeutic efficacy.
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!