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      1. Author :
        van der Meer, Jelger J.; de Boer, Onno J.; Teeling, Peter; van der Loos, Chris M.; Dessing, Mark C.; van der Wal, Allard C.
      2. Title :
      3. Type :
        Journal Article
      4. Year :
        2011
      5. Publication :
        International Journal of Clinical and Experimental Pathology
      6. Products :
      7. Volume :
        4
      8. Issue :
        3
      9. Page Numbers :
        N/A
      10. Research Area :
        N/A
      11. Keywords :
        Atherosclerosis; Coronary Vessels; cytokines; Flow Cytometry; Homeostasis; Humans; Immunohistochemistry; Interleukin-15; Muscle, Smooth, Vascular; Myocytes, Smooth Muscle; Nuance; Nuance multispectral imaging system; plaque stability; Plaque, Atherosclerotic; Platelet-Derived Growth Factor; Qps; Quantitative Pathology; Quantitative Pathology Imaging Instruments; Receptors, Interleukin-15; Reverse Transcriptase Polymerase Chain Reaction; Signal Transduction; smooth muscle cells; Tumor Necrosis Factor-alpha; Nuance
      12. Abstract :
        Interleukin (IL)-15 is a cytokine that has a broad tissue distribution and is important in maintaining homeostasis of cells and stability of tissues. When II-15 is also expressed by vascular smooth muscle cells (SMC), which are the dominant type of cells in most atherosclerotic plaques, it could be important in maintaining plaque tissue integrity and hence resistance of plaques towards development of clinically relevant complications such as plaque rupture and thrombosis. In this study, IL-15 and IL-15Rα in vitro expression by coronary artery SMC was investigated using RT -PCR and FACS analysis. Immunohistochemistry was used to study in situ expression of IL-15 and IL-15R by SMC of human carotid artery atherosclerotic plaques. Multiplex ligand-dependent probe amplification (MLPA) was used to investigate the mRNA expression of 40 pro- and anti inflammatory genes after stimulating coronary SMC with IL-15. We found that atherosclerotic SMC express both IL-15 and its receptor IL-15R, and TNF-γ and TNF-α enhance IL-15R expression in cultured SMC. MLPA studies on SMC revealed enhanced expression of PDGF beta mRNA after IL15 stimulation. In conclusion, our data suggest that IL-15 may contribute to atherosclerotic plaque integrity by stimulation of smooth muscle cells, probably in a PDGF dependent fashion.
      13. URL :
        http://www.ncbi.nlm.nih.gov/pubmed/21487524
      14. Call Number :
        PKI @ Kathryn.Cook @
      15. Serial :
        21121
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