The inhibition of glycogen synthase kinase-3β (GSK-3β) activity prevents tau hyperphosphorylation and binds it to the microtubule network. Therefore, a GSK-3β inhibitor may be a recommended drug for Alzheimer’s treatment. In silico methods are currently considered as one of the fastest and most cost-effective available alternatives for drug/design discovery in the field of treatment. In this study, computational drug design was conducted to introduce compounds that play an effective role in inhibiting the GSK-3β enzyme by molecular docking and molecular dynamics simulation. The iridoid glycosides of the common snowberry (Symphoricarpos albus), including loganin, secologanin, and loganetin, are compounds that have an effect on improving memory and cognitive impairment and the results of which on Alzheimer’s have been studied as well. In this study, in the molecular docking phase, loganin was considered a more potent inhibitor of this protein by establishing a hydrogen bond with the ATP-binding site of GSK-3β protein and the most negative binding energy to secologanin and loganetin. Moreover, by molecular dynamics simulation of these ligands and GSK-3β protein, all structures were found to be stable during the simulation. In addition, the protein structure represented no change and remained stable by binding ligands to GSK-3β protein. Furthermore, loganin and loganetin have higher binding free energy than secologanin; thus, these compounds could effectively bind to the active site of GSK-3β protein. Hence, loganin and loganetin as iridoid glycosides can be effective in Alzheimer’s prevention and treatment, and thus, further in vitro and in vivo studies can focus on these iridoid glycosides as an alternative treatment.
Metformin can improve chronic inflammation and oxidative stress. The main mechanism of AMPK effects was decrease of proinflammatory cytokines and oxidative stress factors after treatment with metformin in diseases. Metformin, a hypoglycemic drug, increases peripheral glucose uptake, decreases liver glucose production and suppresses insulin resistance in liver and skeletal muscle. The molecular anti-inflammatory mechanism of metformin involves the reduction of the level of proinflammatory cytokines through AMPK activation. It can reduce endothelial dysfunction by ameliorating the expression of inflammatory gene and protein like vascular cell adhesion molecule-1 (VCAM-1), and vasodilating maternal vessels. Many studies showed that AMPK activation were the main contributors to the antioxidant and anti-inflammatory effects of metformin. Please cite this paper as:
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