Table I.
Mediator | Source | Potential role in stroke | References |
---|---|---|---|
Histamine and serotonin | Mast cells, platelets | Enhancing vascular leakage, regulating cell proliferation and differentiation | 74–76 |
Bradykinin | Plasma substrate | Enhancing vascular leakage and pain | 77 |
C3a | Plasma protein via liver | Enhancing vascular leakage and the formation of opsonic fragment (C3b) | 78 |
C5a | Macrophages | Enhancing vascular leakage, chemotaxis and leukocyte adhesion and activation | 79 |
Prostaglandins | Mast cells from membrane phospholipids | Potentiating other mediators, vasodilation, pain and fever | 80,81 |
Leukotriene B4 | Leukocytes | Leukocyte adhesion and activation | 82 |
Oxygen metabolites | Leukocytes | Endothelial damage and tissue damage | 22,83–85 |
IL-1 and TNF-α | Macrophages, other | Acute phase reactions, enhancing vascular leakage and endothelial and tissue damage | 18,65,68, 86–89 |
Chemokines | Leukocytes, others | Leukocyte activation, enhancing vascular leakage and endothelial and tissue damage | 90–92 |
Nitric oxide | Macrophages, endothelium | Vasodilation and cytotoxicity | 71 |
C, complement component; IL-1, interleukin-1; TNF-α, tumor necrosis factor α.