ReviewJournal of biochemical and molecular toxicology2026
Icariside II in Neurological Disorders: Mechanistic Insights Into Alzheimer's Disease, Cerebral Ischemia and Parkinson's Disease.
Review in Journal of biochemical and molecular toxicology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
Icariside II (ICS II), a PDE5 inhibitor, is a flavonoid glycoside and primary metabolite of icariin, derived from the herb Herba epimedii, and exhibits promising neuroprotective potential in various pre-clinical studies. The current review provides evidence that ICS II shows neuroprotective potential against various neurological disorders, mainly including Alzheimer's disease, Parkinson's disease and Cerebral ischemia through modulating neuroinflammation, oxidative stress, neural apoptosis, neurogenesis, mitochondrial and cognitive dysfunction. It regulates multiple signalling pathways including PI3K/Akt, Keap1/Nrf2, TLR4/MyD88/NF-κB, cGMP/PKG/CREB, TGFB1/Smad, Wnt/β-catenin signaling and BDNF/TrkB/CREB. The pre-clinical evidence suggests that ICS II attenuates oxidative stress through increasing antioxidant enzymes SOD, GSH, catalase, and HO-1, with decreasing MDA and lipid peroxidation. Neuroinflammation is suppressed by inhibition of pro-inflammatory cytokines and down-regulation of IL-1β, IL-6, TNF-α, COX-2, iNOS levels and up-regulation of tight-junction proteins like occludin, claudin-5, ZO-1. Apoptosis is regulated via altering PARP, Bcl-2, Bax/Bcl-2 ratio and reducing caspase-3 activation. Mitochondrial dysfunction is ameliorated by restoring Complex I activity and increasing mitofusin-1/2 expression and reducing mitochondrial fission factors. Collectively, these molecular mechanisms show promise for ICS II as a potential candidate in different in vivo and in vitro studies of neurological disorders.
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