Synthetic
cannabidiol (CBD) derivative VCE-004.8 is a
peroxisome proliferator-activated receptor gamma (PPARγ) and
cannabinoid receptor type 2 (CB2) dual agonist with
hypoxia mimetic activity. The oral formulation of VCE-004.8, termed EHP-101, possesses anti-inflammatory properties and is currently in phase 2 clinical trials for relapsing forms of
multiple sclerosis. The activation of PPARγ or CB2 receptors exerts
neuroprotective effects by dampening
neuroinflammation in
ischemic stroke models. However, the effect of a dual PPARγ/CB2 agonist in
ischemic stroke models is not known. Here, we demonstrate that treatment with VCE-004.8 confers neuroprotection in young mice subjected to
cerebral ischemia. Male C57BL/6J mice, aged 3-4 months, were subjected to 30-min transient
middle cerebral artery occlusion (MCAO). We evaluated the effect of intraperitoneal VCE-004.8 treatment (10 or 20 mg/kg) either at the onset of reperfusion or 4h or 6h after the reperfusion. Seventy-two hours after
ischemia, animals were subjected to behavioral tests. Immediately after the tests, animals were perfused, and brains were collected for histology and PCR analysis. Treatment with VCE-004.8 either at the onset or 4h after reperfusion significantly reduced
infarct volume and improved behavioral outcomes. A trend toward reduction in
stroke injury was observed in animals receiving the drug starting 6h after recirculation. VCE-004.8 significantly reduced the expression of pro-inflammatory
cytokines and
chemokines involved in BBB breakdown. Mice receiving VCE-004.8 had significantly lower levels of extravasated
IgG in the brain parenchyma, indicating protection against
stroke-induced BBB disruption. Lower levels of active
matrix metalloproteinase-9 were found in the brain of drug-treated animals. Our data show that VCE-004.8 is a promising drug candidate for treating ischemic
brain injury. Since VCE-004.8 has been shown to be safe in the clinical setting, the possibility of repurposing its use as a
delayed treatment option for
ischemic stroke adds substantial translational value to our findings.