Background: Although Toll-like receptor 4 (TLR-4) is involved in monocyte activation in patients with accelerated forms of atherosclerosis, the relationship between the expression of TLR-4 on circulating monocytes and coronary plaque vulnerability has not previously been evaluated. We investigated this relationship using 64-slice multidetector computed tomography (MDCT) in patients with stable angina pectoris (SAP).
Methods and results: We enrolled 65 patients with SAP who underwent MDCT. Three monocyte subsets (CD14CD16, CD14CD16, and CD14CD16) and expression of TLR-4 were measured by flow cytometry. Intracoronary plaques were assessed by 64-slice MDCT. We defined vulnerability of intracoronary plaques according to the presence of positive remodeling (remodeling index >1.05) and/or low CT attenuation (<35 HU). The circulating CD14CD16monocytes more frequently expressed TLR-4 than CD14CD16and CD14CD16monocytes (P<0.001). The relative proportion of the expression of TLR-4 on CD14CD16monocytes was significantly greater in patients with vulnerable plaque compared with those without (10.4 [4.1-14.5] % vs. 4.5 [2.8-7.8] %, P=0.012). In addition, the relative proportion of TLR-4 expression on CD14CD16monocytes positively correlated with the remodeling index (r=0.28, P=0.025) and negatively correlated with CT attenuation value (r=-0.31, P=0.013).
Conclusions: Upregulation of TLR-4 on CD14CD16monocytes might be associated with coronary plaque vulnerability in patients with SAP.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1253/circj.CJ-16-0688 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lidocaine Inhibits the Proliferation of Non-Small Cell Lung Cancer and Exerts Anti-Inflammatory Effects Through the TLR-9/MyD88/NF-κB Pathway.
DNA Cell Biol
January 2025
Department of Anesthesiology, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China.
Lung cancer represents a significant global health burden, with non-small cell lung cancer (NSCLC) being the most common subtype. The current standard of care for NSCLC has limited efficacy, highlighting the necessity for innovative treatment options. Lidocaine, traditionally recognized as a local anesthetic, has emerged as a compound with potential antitumor and anti-inflammatory capabilities.
View Article and Find Full Text PDFFluorescent nucleobase analogue for cellular visualisation and regulation of immunostimulatory CpG oligodeoxynucleotides.
Org Biomol Chem
January 2025
Immunology Frontier Research Center, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan.
In this study, we explored the chemical modification of toll-like receptor 9 (TLR9) agonist DNA using a highly fluorescent thymine analogue, ThexT, focusing on its structural and photophysical characteristics. ThexT-labelled CpG oligonucleotides effectively demonstrated intracellular localisation within macrophage cell lines. Notably, immunostimulatory activity varied depending on the site of ThexT incorporation within the TLR9 agonist sequence.
View Article and Find Full Text PDFNeonatal Sevoflurane Exposure Exerts Sex-Specific Effects on Cognitive Function via C3- and TLR4-Related M1/M2 Microglial Cell Polarisation in Rats.
J Cell Mol Med
January 2025
Department of Anesthesia, Fujian Medical University Union Hospital, Fuzhou, China.
In this study, we aimed to explore the sex-specific effects and mechanisms of sevoflurane exposure on the neural development of pubertal rats on the basis of M1/M2 microglial cell polarisation and related signalling pathways. A total of 48 rat pups (24 males and 24 females) were assigned to the 0- or 2-h sevoflurane exposure group on the seventh day after birth. The Morris water maze (MWM) test was subsequently conducted on the 32nd to 38th days after birth.
View Article and Find Full Text PDFMechanisms of wogonoside in the treatment of atherosclerosis based on network pharmacology, molecular docking, and experimental validation.
BMC Complement Med Ther
January 2025
Department of Cardiovascular Medicine, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
Background: Atherosclerosis serves as the fundamental pathology for a variety of cardiovascular disorders, with its pathogenesis being closely tied to the complex interplay among lipid metabolism, oxidative stress, and inflammation. Wogonoside is a natural flavonoid extracted from Scutellaria baicalensis with a variety of biological activities, including anti-inflammatory, hypolipidemic, and cardiac function improvement properties. Despite these known effects, the specific role of wogonoside in the context of atherosclerosis remains to be elucidated.
View Article and Find Full Text PDFMonocytes serve as Shiga toxin carriers during the development of hemolytic uremic syndrome.
Cell Mol Biol Lett
January 2025
State Key Laboratory of Pharmaceutical Biotechnology, Department of Gastroenterology, Drum Tower Hospital, Nanjing University Medical School, Nanjing University, Nanjing, 210093, Jiangsu, China.
Shiga toxin (Stx)-induced hemolytic uremic syndrome (HUS) poses a life-threatening complication for which a definitive treatment remains elusive. To exert its cytotoxic effect on renal cells, Stx must be delivered from the infected intestines to the kidney. However, the mechanism underlying Stx delivery remains unclear.
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!