Proteinase 3 (PR3) is a neutrophil serine protease present in cytoplasmic granules but also expressed at the neutrophil surface where it mediates proinflammatory effects.
The AT1R mediates proliferative, proinflammatory, and angiogenic effects of ANG II [ 4, 5].
A recent study demonstrated that a TLR4 receptor mediates the proinflammatory effects of resistin in human cells [ 32].
Structure-function analysis has demonstrated that the DNA-binding B box domain mediates the proinflammatory effects of HMGB1, while the DNA-binding A box is an anti-inflammatory molecule that inhibits these activities mediated by full-length HMGB1 protein [ 67].
Because of its proinflammatory activities, HMGB1 could mediate key events in the pathogenesis of systemic lupus erythematosus, a possibility supported by elevations of HMGB1 in patient blood and increased expression in renal biopsies.
In particular, an interaction between HMGB1 and TLR2 or TLR4 postulates that it may mediate the proinflammatory actions of HMGB1.
Ligand binding is described to increase RAGE activity [ 15, 16], which mediates proinflammatory responses [ 17– 19] and generates oxidative stress [ 15, 18, 20] that may contribute to the pathogenesis of CVD.
These catabolic events are largely mediated by proinflammatory cytokines and mediators, for example, matrix metalloproteinases (MMPs), and a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS) [ 59].
It has been suggested that dietary fiber may reduce diabetes risk through its effect on hepatic function and insulin sensitivity or by mediating the proinflammatory process (5, 6).
As proinflammatory cytokines have been shown to induce sickness behaviour and have been linked to psychological responses, for example, depression (Dantzer et al, 2008), it is possible that the link is mediated by proinflammatory cytokines.
