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  • Title: CD14+ CD163+ IL-10+ monocytes/macrophages: Pro-angiogenic and non pro-inflammatory isolation, enrichment and long-term secretion profile.
    Author: Mayer A, Lee S, Jung F, Grütz G, Lendlein A, Hiebl B.
    Journal: Clin Hemorheol Microcirc; 2010; 46(2-3):217-23. PubMed ID: 21135497.
    Abstract:
    The establishment of a stable endothelial layer on a biomaterial suture is a well known strategy to achieve hemocompatibility. The endothelialisation is supported by factors as e.g. vascular endothelial growth factor (VEGF), which can be secreted by monocytes/macrophages (mo/mΦ) in an angiogenic milieu. In order to avoid detrimental inflammation triggered by these mo/mΦ, we established a protocol for the generation of alternatively activated macrophages and studied their response towards VEGF-A165. We could generate sufficient amounts of these CD14+ CD163+ IL-10+ mo/mΦ from buffy coats(8.6 ± 4.7 × 105 cells/mlbuffy coat). Furthermore, we achieved a VEGF-A165 secretion in the nanogram range. The VEGF-A165 secretion increased 2.1-fold within 14 days from 7.6 ± 2.2 to 16.1 ± 2.5ng/ml when the cells were grown with a VEGF-A165 supplemented (10ng/ml) cell culture medium. Within this time period the secretion levels of other pro-angiogenic growth factors (bFGF, PDGF-BB) and immunomodulatory cytokines (IL-10, IL-12, IL-1ra, TNFα, IFNγ) reached only the picogram range. These results suggest that angiogenically stimulated CD14+ CD163+ IL-10+ mo/mΦ might be useful as a cellular cytokine delivery system supporting endothelialisation of biomaterials without inducing pro-inflammatory effects.
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