Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Grün, NG; Strohmeier, K; Moreno-Viedma, V; Le Bras, M; Landlinger, C; Zeyda, K; Wanko, B; Leitner, L; Staffler, G; Zeyda, M; Stulnig, TM.
Peptide-based vaccination against OPN integrin binding sites does not improve cardio-metabolic disease in mice.
Immunol Lett. 2016; 179(11):85-94
Doi: 10.1016/j.imlet.2016.09.006
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- Führende Autor*innen der Med Uni Graz
- Sommer Nicole
- Co-Autor*innen der Med Uni Graz
- Leitner Lukas
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- Abstract:
- Obesity causes insulin resistance via a chronic low-grade inflammation. This inflammation is characterized by elevated pro-inflammatory markers and macrophage accumulation in the adipose tissue (AT). AT inflammation is a key factor causing insulin resistance and thus type 2 diabetes, both linked to atherosclerotic cardiovascular disease. Osteopontin (OPN), a well-known inflammatory cytokine, is involved in obesity-linked complications including AT inflammation, insulin resistance, atherosclerosis and CVD. During inflammation, OPN is proteolytically cleaved by matrix metalloproteinases or thrombin leading to increased OPN activity. Therefore, OPN provides a new interesting target for immunological prevention and treatment of obesity-associated diseases. The aim of our study was to evaluate peptide-based vaccines against integrin binding sites of OPN and to examine whether these active immunotherapies are functional in reducing metabolic tissue inflammation, insulin resistance, and atherosclerosis in a cardio-metabolic (Ldlr-/- mice) and a diet-induced obesity model (WT mice). However, atherosclerosis, insulin resistance and AT inflammation were not diminished after treatment with OPN-derived peptides in murine models. Lack of efficacy was based on a failure to induce antibodies capable to bind epitopes in the context of functional OPN protein. In conclusion, our data point to unexpected challenges in the immunotherapeutic targeting of adhesive motives, such as RGD containing sequences, on endogenous proteins. Copyright © 2016 European Federation of Immunological Societies. Published by Elsevier B.V. All rights reserved.
- Find related publications in this database (using NLM MeSH Indexing)
- Animals -
- Antibodies - blood
- Antibodies - immunology
- Atherosclerosis - etiology
- Atherosclerosis - metabolism
- Atherosclerosis - pathology
- Binding Sites - immunology
- Biomarkers -
- Cross Reactions - immunology
- Disease Models, Animal -
- Heart Diseases - blood
- Heart Diseases - etiology
- Heart Diseases - metabolism
- Heart Diseases - therapy
- Immunization -
- Inflammation - etiology
- Inflammation - metabolism
- Insulin Resistance -
- Integrins - chemistry
- Integrins - metabolism
- Male -
- Metabolic Diseases - blood
- Metabolic Diseases - etiology
- Metabolic Diseases - metabolism
- Metabolic Diseases - therapy
- Mice -
- Mice, Knockout -
- Obesity - metabolism
- Osteopontin - chemistry
- Osteopontin - immunology
- Osteopontin - metabolism
- Peptide Fragments - administration & dosage
- Peptide Fragments - immunology
- Protein Binding -
- Receptors, LDL - deficiency
- Find related publications in this database (Keywords)
- Osteopontin
- Immunization
- Cardio-metabolic disease
- Atherosclerosis
- Rodent
- Cytokine