Title : A novel neuroprotective mechanism of hexaraphane (6 MSITC) derived from wasabi
Abstract:
Hexaraphane (HXN; 6-methylsulfinylhexyl isothiocyanate) is an isothiocyanate compound derived from the rhizomes and roots of wasabi (Eutrema japonicum). Accumulating evidence demonstrates that HXN exerts potent antioxidant, anti-inflammatory, and neuroprotective activities, supporting its therapeutic relevance for neurodegenerative disorders such as Alzheimer’s disease. Recent mechanistic studies have revealed that HXN not only activates the Nrf2 pathway but also suppresses tau phosphorylation through inhibition of glycogen synthase kinase-3β (GSK?3β). Detailed analyses indicate that HXN attenuates GSK?3β activity via the upregulation of Akt-mediated inhibitory phosphorylation at Ser9 as well as direct allosteric suppression of GSK?3β catalytic function, leading to reduced tau phosphorylation at multiple pathological epitopes. Newly clarified pharmacokinetic data show that HXN is rapidly absorbed after oral intake, partially converted into bioactive metabolites, reaches peak plasma levels within 1–2 hours, and exhibits favorable tissue distribution including central nervous system penetration, providing a mechanistic rationale for its functional effects. Clinical studies in healthy middle?aged and older adults have shown that daily intake of HXN-containing Wasabi Sulfinyl™ (WS) leads to improvements in cognitive functions such as attention, judgment, and memory, while exploratory intervention in individuals with ME/CFS has indicated reductions in neurological symptoms including brain fog and photophobia. Building on these findings, a new randomized clinical study targeting younger adults is currently underway to evaluate HXN’s effects on cognitive performance and neural resilience in early adulthood, and the results will be reported in due course. Collectively, the emerging mechanistic and clinical data highlight HXN as a promising neuroprotective compound with potential applicability not only to Alzheimer’s disease but also to broader neurological conditions characterized by cognitive dysfunction and neuroinflammation.
