ArticleMolecular neurobiology2016
Intranasal Delivery of RGD Motif-Containing Osteopontin Icosamer Confers Neuroprotection in the Postischemic Brain via αvβ3 Integrin Binding.
Article in Molecular neurobiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed, 33 citations in OpenAlex.
- NF-κB activation in astrocytes impairs wound healing after traumatic brain injury in male mice.Nature communications · 2026Article
- Targeting the interactions between neutrophils and microglia: a novel strategy for anti-inflammatory treatment of stroke.Acta pharmacologica Sinica · 2026Review
- Critical Role of the Endothelial αV/β5 Integrin Receptor Signaling Pathway in Promoting Irisin-induced Hippocampal BDNF Expression.Molecular neurobiology · 2025Article
- Nanoparticle-Mediated Nose-to-Brain Delivery for Ischemic Stroke Therapy: Preclinical Insights.Pharmaceutics · 2025Review
- H4K12 Lactylation Activated-Spp1 in Reprogrammed Microglia Improves Functional Recovery After Spinal Cord Injury.CNS neuroscience & therapeutics · 2025Article
- Neural repair function of osteopontin in stroke and stroke‑related diseases (Review).Experimental and therapeutic medicine · 2024Review
- Genetics of ischemic stroke functional outcome.Journal of neurology · 2024Review
- Osteopontin/secreted phosphoprotein-1 harnesses glial-, immune-, and neuronal cell ligand-receptor interactions to sense and regulate acute and chronic neuroinflammation.Immunological reviews · 2022Review
- An integrin axis induces IFN-β production in plasmacytoid dendritic cells.The Journal of cell biology · 2022Article
- Osteopontin mediates the formation of corpora amylacea-like structures from degenerating neurons in the CA1 region of the rat hippocampus after ischemia.Cell and tissue research · 2022Article
- Neuronal Loss after Stroke Due to Microglial Phagocytosis of Stressed Neurons.International journal of molecular sciences · 2021Review
- Intranasal Delivery of RGD-Containing Osteopontin Heptamer Peptide Confers Neuroprotection in the Ischemic Brain and Augments Microglia M2 Polarization.International journal of molecular sciences · 2021Article
- Bone-Derived Modulators That Regulate Brain Function: Emerging Therapeutic Targets for Neurological Disorders.Frontiers in cell and developmental biology · 2021Review
- Osteopontin as a candidate of therapeutic application for the acute brain injury.Journal of cellular and molecular medicine · 2020Review
- Injectable Gelatin Hydrogel Suppresses Inflammation and Enhances Functional Recovery in a Mouse Model of Intracerebral Hemorrhage.Frontiers in bioengineering and biotechnology · 2020Article
- CeOCellular and molecular neurobiology · 2019Article
- Osteopontin and its spatiotemporal relationship with glial cells in the striatum of rats treated with mitochondrial toxin 3-nitropropionic acid: possible involvement in phagocytosis.Journal of neuroinflammation · 2019Article
- Thyroid Hormone Action on Innate Immunity.Frontiers in endocrinology · 2019Review
- Perinatal Hypoxic-Ischemic Encephalopathy and Neuroprotective Peptide Therapies: A Case for Cationic Arginine-Rich Peptides (CARPs).Brain sciences · 2018Review
- Neuroprotective and Anti-inflammatory Effects of a Dodecamer Peptide Harboring Ninjurin 1 Cell Adhesion Motif in the Postischemic Brain.Molecular neurobiology · 2018Article
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Osteopontin (OPN) is a phosphorylated glycoprotein possessing an arginine-glycine-aspartate (RGD)-motif, which binds to several cell surface integrins and mediates a wide range of cellular processes. Inductions of OPN have been reported in the postischemic brain, and the neuroprotective effects of OPN have been demonstrated in animal models of stroke. In the present study, we showed a robust neuroprotective effect of RGD-containing icosamer OPN peptide (OPNpt20) in a rat model of focal cerebral ischemia (middle cerebral artery occlusion, MCAO). Intranasally administered OPNpt20 reduced mean infarct volume by 79.7 % compared to the treatment-naïve MCAO control animals and markedly ameliorated neurological deficits. In addition, OPNpt20 significantly suppressed the inductions of iNOS and of inflammatory markers in postischemic brains and in primary microglial cultures, demonstrating anti-inflammatory effects. Administration of a mutant peptide, in which RGD was replaced by arginine-alanine-alanine (RAA), failed to suppress infarct volumes in MCAO animals and co-administration of OPNpt20 with anti-αvβ3 integrin antibody failed to suppress iNOS induction in primary microglia culture, indicating that the RGD motif in OPNpt20 and endogenous αvβ3 integrin play critical roles. Furthermore, pull-down assay revealed a direct binding between OPNpt20 and αvβ3 integrin in primary microglia culture. Together, these results indicate that RGD-containing OPN icosamer has therapeutic potential in the postischemic brain and αvβ3 integrin-mediated anti-inflammatory effect might be an underlying mechanism.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.