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Inflammation
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Inflammatory cytokines
Plasma derived Bradykinin C3 C5a Factor XII (Hageman Factor). Membrane attack complex Plasmin Thrombin Cell derived Lysosome granules Histamine IFN-γ Leukotriene B4 Nitric oxide Prostaglandins TNF-α and IL-1
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Yacoubian S and Serhan CN (2007) New endogenous anti-inflammatory and proresolving lipid mediators: implications for rheumatic diseases Nat Clin Pract Rheumatol 3: 570–579 doi: /ncprheum0616
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Albini and Sporn Nature Reviews Cancer 7, 139–147 (February 2007) | doi:10.1038/nrc2067
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Wound healing Functional aspect Structural aspect Three phases
stop blood loss restore function prevent infection Structural aspect restoring both cells and their protein matrix Three phases Inflammatory phase proliferative/repair pahse remodeling/maturation phase
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Inflammatory phase
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Proliferative phase
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Remodeling phase
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Chronic inflammation - Granuloma
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Foreign body reaction begins as wound healing
accumulation of exudate infiltration of inflammatory cells formation of granulation tissue persistent presence of a biomedical implant inhibits full healing Histological findings formation of foreign body giant cells encapsulation of the foreign object chronic inflammation Nonspecific immune reaction
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Foreign body reaction Giant cell Encapsulation
Products of macrophage fusion Hallmark of the foreign body reaction Secrete degradative agents: superoxides and free radicals Encapsulation Firm, avascular collagen shell deposited around a foreign body Isolating foreign body from the host tissues
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Artificial Skin
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Immune privilege
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Take home message Four symptoms and signs of inflammation
Three stages of wound healing and foreign body reaction Immune privilege
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