Interleukin-6 and interleukin-8 protein and gene expression in human arterial atherosclerotic wall
| Autor: | Horea Rus, Florin Niculescu, R. Vlaicu |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Pathology
medicine.medical_specialty Endothelium Arteriosclerosis Gene Expression Enzyme-Linked Immunosorbent Assay Protein Serine-Threonine Kinases Gene expression Extracellular medicine Protein biosynthesis Humans Interleukin 8 Interleukin 6 Aorta Cells Cultured biology Interleukin-6 Ribosomal Protein S6 Kinases Interleukin-8 DNA Middle Aged Immunohistochemistry Molecular biology Complement system Femoral Artery medicine.anatomical_structure biology.protein RNA Endothelium Vascular Oligonucleotide Probes Cardiology and Cardiovascular Medicine Cell activation |
| Zdroj: | Atherosclerosis. 127:263-271 |
| ISSN: | 0021-9150 |
| DOI: | 10.1016/s0021-9150(96)05968-0 |
| Popis: | Interleukin 6 (IL-6) and interleukin 8 (IL-8) are present in the human arterial atherosclerotic wall as cellular and extracellular deposits in the connective tissue matrix. Quantitative determinations of IL-6 by ELISA showed mean values of 27.6 +/- 3.3 ng/100 mg protein in normal intima, 37.3 +/- 2.1 ng/100 mg protein in fibrous plaque and 25.7 +/- 4.3 ng/100 mg total extracted protein in media. IL-8 levels were 3.5 +/- 0.6 ng/100 mg protein in normal intima, 11.3 +/- 2.1 ng/100 mg protein in fibrous plaque and 8.5 +/- 1.4 ng/100 mg total extracted protein in media. Fibrous plaques presented statistically significant higher levels of both IL-6 and IL-8. IL-6 and IL-8 gene transcripts were present in human iliac fibrous plaque and media prelevated at surgery indicating that a local production by the cells of the arterial wall participate to their accumulation. We also tested the role of complement activation in induction of IL-6 and IL-8 protein synthesis as well as the subsequent activation of endothelial cells. Only IL-8 was induced by complement activation and this may contribute to increased IL-8 levels found in the atherosclerotic wall. When exposed to terminal complement complexes, endothelial cells in culture also showed an increase of both DNA-synthesis and p70 S6 kinase activity indicating that complement is able to induce not only IL-8 synthesis but also cell activation. The presence of IL-6 and IL-8 in the arterial wall where complement activation also occurred, clearly show the involvement of inflammatory events in initiation and progression of atherosclerosis. |
| Databáze: | OpenAIRE |
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