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- W1009091917 abstract "Rapid elimination of cells undergoing programmed cell death (apoptosis) is vital to maintain tissue homeostasis. The phagocytic removal of apoptotic cells (AC) is mediated by innate immune molecules, professional phagocytes and amateur phagocytes that recognise eat me signals on the surface of the AC. CD14, a pattern recognition receptor expressed on macrophages, is widely known for its ability to recognise the pathogen-associated molecular pattern lipopolysaccharide (LPS) and promote inflammation. CD14 also mediates the binding and removal of AC, a process that is considered to be anti-inflammatory therefore suggesting CD14 is capable of producing two distinct ligand-dependent responses. Our work seeks to define the molecular mechanisms underlying the involvement of CD14 in the non-inflammatory clearance of AC. Here we describe three different differentiation strategies used to generate macrophages from the monocytic cell line THP-1. Whilst CD14 expression was increased in each macrophage model we demonstrate significant differences in the various macrophage models' abilities to respond to LPS and clear AC. We show that CD14 expression correlates with CD14-dependent AC clearance and anti-inflammatory responses to AC. However LPS responsiveness correlates, as expected, with TLR4 but not CD14 expression. These observations suggest CD14-dependent AC clearance is not dependent on TLR4. Taken together our data support the notion that CD14 ligand-dependent responses to LPS and AC are derived from changes at the macrophage surface. The nature and composition of the CD14-co-receptor complex for LPS and AC binding and consequent responses is the subject of further study." @default.
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- W1009091917 date "2010-12-01" @default.
- W1009091917 modified "2023-09-27" @default.
- W1009091917 title "CD14 and innate immune clearance of apoptotic cells" @default.
- W1009091917 hasPublicationYear "2010" @default.
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