Apolipoprotein-derived peptides are promising candidates for the treatment of various inflammatory conditions. The beneficial effects of these peptides are based on multiple mechanisms; prominent among them being high-affinity binding to pro-inflammatory oxidized phospholipids (Ox-PLs) and facilitating their sequestration/metabolism/clearance in the body. This indicates that peptides which can bind exclusively to Ox-PLs without recognizing normal, non-oxidized phospholipids (non-Ox-PLs) will be more potent anti-inflammatory agent than that of the peptides that bind to both Ox-PLs and non-Ox-PLs. In order to develop such Ox-PL-specific peptides, the knowledge about the properties (molecular determinants) of peptides that govern their Ox-PL preference is a must. In this study we have synthesized eleven peptides corresponding to the conserved regions of human apolipoprotein E and compared their biochemical properties, lipid-binding specificities, and anti-inflammatory properties. Our results show that these peptides exhibit considerably different specificities towards non-Ox-PL and different species of Ox-PLs. Some of these peptides bind exclusively to the Ox-PLs and inhibit the pro-inflammatory function of Ox-PLs in human blood. Biochemical characterization revealed that the peptides possess substantially different properties. Our results suggest that physicochemical properties of peptides play an important role in their lipid-binding specificity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.bbalip.2014.01.006 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Acid-Triggered Cascaded Responsive Supramolecular Peptide Alleviates Myocardial Ischemia‒Reperfusion Injury by Restoring Redox Homeostasis and Protecting Mitochondrial Function.
Adv Healthc Mater
January 2025
Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, P. R. China.
Redox imbalance, including excessive production of reactive oxygen species (ROS) caused by mitochondrial dysfunction and insufficient endogenous antioxidant capacity, is the primary cause of myocardial ischemia‒reperfusion (I/R) injury. In the exploration of reducing myocardial I/R injury, it is found that protecting myocardial mitochondrial function after reperfusion not only reduces ROS bursts but also inhibits cell apoptosis triggered by the release of cytochrome c. Additionally, nuclear factor erythroid 2-related factor 2 (Nrf2) is considered a potential therapeutic target for treating myocardial I/R injury by enhancing the cellular antioxidant capacity through the induction of endogenous antioxidant enzymes.
View Article and Find Full Text PDFRaman active diyne-girder conformationally constrained p53 stapled peptides bind to MDM2 for visualisation without fluorophores.
RSC Chem Biol
January 2025
School of Chemistry, Advanced Research Centre, University of Glasgow 11 Chapel Lane Glasgow G11 6EW UK
Peptide stapling is an effective strategy to stabilise α-helical peptides, enhancing their bioactive conformation and improving physiochemical properties. In this study, we apply our novel diyne-girder stapling approach to the MDM2/MDMX α-helical binding region of the p53 transactivation domain. By incorporation of an unnatural amino acid to create an optimal , + 7 bridge length, we developed a highly α-helical stapled peptide, 4, confirmed circular dichroism.
View Article and Find Full Text PDFA self-assembled nanoparticle vaccine elicits effective neutralizing antibody response against EBV infection.
Front Immunol
January 2025
Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China.
Background: Epstein-Barr virus (EBV) is a significant global public health concern because of its association with various malignancies and autoimmune diseases. Over 90% of the global population is chronically infected with EBV, impacting numerous cancer-related cases annually. However, none of the effective prophylactic vaccines against EBV is approved at present.
View Article and Find Full Text PDFSmall Extracellular Vesicles from Young Healthy Human Plasma Inhibit Cardiac Fibrosis After Myocardial Infarction via miR-664a-3p Targeting SMAD4.
Int J Nanomedicine
January 2025
Department of Emergency and Critical Care Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, People's Republic of China.
Purpose: Cardiac fibrosis, a key contributor to ventricular pathologic remodeling and heart failure, currently lacks effective therapeutic approaches.
Patients And Methods: Small extracellular vesicles from young healthy human plasma (Young-sEVs) were characterized via protein marker, transmission electron microscopy, and nanoparticle tracking analysis, then applied in cellular models and mouse models of cardiac fibrosis. Western blotting and qRT-PCR were used to identify protective signaling pathways in cardiac fibroblasts (CFs).
Presence of EGF ligand restricts the binding ability of EgB4 nanobody to EGFR extracellular domain.
Sci Rep
January 2025
Laboratory for Chemical Computation and Modeling, Institute for Computational Science and Artificial Intelligence, Van Lang University, Ho Chi Minh City, 70000, Vietnam.
EgB4 is a nanobody that could facilitate the development of drug-nanobody conjugates or drug delivery in cancer treatment due to its specific binding ability to the EGFR transmembrane protein. More significantly, EgB4 does not hamper the EGFR function and associates with EGFR in both the presence and absence of an EGF ligand. However, the difference in EgB4-EGFR interaction with and without EGF ligand is not clear.
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!