Review Article

Neuroprotective Mechanisms of PPARδ: Modulation of Oxidative Stress and Inflammatory Processes

Table 1

The neuroprotective benefits of PPARδ agonists.

CNS disorderPPARδ agonistNeuroprotective benefits

Stroke GW501516Significantly attenuated the cortical infarct area following MCAO-induced ischemic damage in rats [12]
Reduced OGD-induced MMP-9 enzymatic activity in mice [13]
Protected against vascular endothelial cell death by inhibiting expression of miR-15a, which increased Bcl-2 expression, reduced golgi fragmentation, and decreased caspase-3 activity [43]
L-165041Significantly attenuated the cortical infarct area following MCAO-induced ischemic damage in rats [12]

Multiple sclerosisGW0742Reduced emergence of new cortical lesions, increased PLP mRNA, and reduced IL-1β expression in mice immunized with MOG [14]
GW501516Reduced IL-1, IL-23, IFNγ, and IL-17 and increased IL-4 and IL-10 in mice immunized with MOG [50]
Reduced LPS-induced TNF-α and iNOS mRNA in aggregating brain cells [54]
L-165041Reduced IL-1, IL-23, IFNγ, and IL-17 and increased IL-4 and IL-10 in mice immunized with MOG [50]

Alzheimer’s disease GW0742Blocked Aβ peptide-induced cell death, as measured by LDH release and Fluorojade B staining, in primary cultures of rat cortical neurons [21]
Decreased amyloid burden, increased neprilysin expression, and decreased GFAP expression in 5xFAD mice [22]
L-160,043Prevented STZ-induced neurodegeneration and cognitive impairment in rats. This was associated with reduced tau phosphorylation, increased choline acetyltransferase, attenuated 8-OHdG and HNE, and reduced GFAP expression [15]

Parkinson’s disease GW501516Ameliorated MPTP-induced depletion of striatal dopamine and its metabolites in mice [12]
Reduced Caspase-3 and protected SH-SY5Y cells from MPP+-induced cell death [12]
L-165041Ameliorated MPTP-induced depletion of striatal dopamine and its metabolites in mice [12]
Reduced Caspase-3 and protected SH-SY5Y cells from MPP+-induced cell death [12]

Radiation-induced brain injuryGW0742Prevented microglial activation (CD68+ cells) in mice irradiated with a single dose of 10 Gy (unpublished)
L-165041Prevented intracellular ROS generation, Cox-2, iNOS, and MCP-1 expression, IL-1β and TNF-α mRNA, and NF-κB, and AP-1 activation in BV-2 cells irradiated with 10 Gy (unpublished)

Spinal cord injury GW0742Improved motor function of mice and reduced TNF-α, IL-1β, and iNOS expression, NF-κB activation, neutrophil infiltration, nitrotyrosine and lipid peroxidation, FasL expression, and TUNEL staining [23]
Reduced Cox-2, p-p38 MAPK, and p-c-jun expression, and NF-κB activation in murine spinal cord slices [88]