Several receptors have been implicated in mediating cellular effects of HMGB1 [ 9].
Dopamine also mediates cellular effects, independent of or in conjunction with receptor activation.
Aberrant or elevated levels of ROS can mediate deleterious cellular effects, including neuronal toxicity and degeneration observed in the etiology of a number of pathological conditions (Trachootham et al., 2008).
Background: 14-3-3 proteins abundantdand and conserved polypeptides that mediate the cellular effects of basophilic protein kinases through their ability to bind specific peptide motifs phosphorylated on serine or threonine.
Indeed, many growth factor receptors mediate their cellular effects by intrinsic tyrosine kinase activity, which in turn, may phosphorylate other effector molecules involved in mitogenesis.
Furthermore, several non-Smad pathways have also been shown to mediate the cellular effects of TGF-β1.
Both the precursor (Progranulin) and the degraded forms (Granulins) mediate different cellular effects in a variety of pathophysiological conditions such as inflammation, proliferation, carcinogenesis and wound healing [ 25].
PARs comprise a class A G protein-coupled receptor (GPCR) family with currently four members, PAR1, PAR2, PAR3 and PAR4[ 1, 2] that mediate the cellular effects of proteinases (for reviews see: [ 3- 7]).
TNF-α has been implicated as an important proatherogenic factor (Churg et al. 2002), and it is also known to mediate its cellular effects via mitochondrial oxidant generation (Meier et al. 1989; Satriano et al. 1993; Schulze-Osthoff et al. 1992); therefore, the effects of decreased SOD2 activity (as in our apoE−/ −, SOD2+/− mice) on TNF-α levels were of interest in these studies.
