• nanoporous silica microparticle interaction with toll-like receptor agonists in macrophages

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
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     nanoporous silica microparticles (nsio2-mp) are considered to be potential drug delivery systems and scaffolding platforms in tissue engineering. however, few biocompatibility studies regarding nsio2-mp interaction with the immune system have been reported. toll-like receptors (tlr) are involved in host defence as well as autoimmune and inflammatory diseases. the results show that nsio2-mp up to 100 μg ml−1 do not affect macrophage cell viability after 24 h cell culture. moreover, nsio2-mp do not compromise the cell viability of tlr-activated raw 264.7 cells, for either cell surface tlr (tlr1/tlr2/tlr4/tlr6) or endocytic compartment tlr (tlr3/tlr7/tlr9). furthermore, raw 264.7 cells do not respond to nsio2-mp exposure in terms of il-6 or il-10 secretion. nsio2-mp co-treatment in the presence of tlr ligands does not impair or enhance the secretion of the pro-inflammatory cytokine il-6 or the regulatory cytokine il-10. thus, nsio2-mp do not affect macrophage polarization towards a pro-inflammatory or immunosuppressive status, representing added value in terms of biocompatibility compared with other sio2-based micro- and nanoparticles.

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