Quinacrine is a compound that is commonly used as an anti-protozoal agent. It inhibits voltage-dependent sodium channels (IC50: 3.3 μM) and suppresses aldehyde oxidase (IC50: 3.3 μM). Quinacrine prevents misfolding of prion protein (EC50: 0.3 μM). As an e
Endoplasmic reticulum (ER) stress, caused by accumulation of misfolded proteins and a disruption of calcium homeostasis, has been linked to several neuronal diseases including, Parkinson's, Alzheimer's, and prion diseases. A screen for protective activity against ER stress-dependent cell death identified termitomycamides, extracts from the fruiting bodies of T. titanicus, a notably large edible mushroom that is cultivated symbiotically in the nests of termites Termitomycamide B is a fatty acid isolated from T. titanicus that at a dose of 0.1 μg/ml protects against ER stress-dependent cell death in Neuro2a cells induced by tunicamycin.
Chloroguanabenz is an antiprion agent and a derivative of the α2-adrenergic receptor agonist guanabenz . It inhibits prion formation in yeast and mammalian cell-based assays. Chloroguanabenz reduces the levels of both soluble and aggregated forms of the truncated Huntingtin derivative Htt48 in an HEK293T cellular model of Huntington's disease.
6-Aminophenanthridine is an antiprion agent. It inhibits prion formation in yeast- and mammalian-based screening assays when used alone and, to a greater extent, when used in combination with the α2-adrenergic receptor agonist guanabenz . 6-Aminophenanthridine (300 μM) inhibits protein folding activity of the ribosome (PFAR) by directly competing with protein substrates for the active site and decreases the yield of refolded protein without affecting the refolding rate. It prevents progressive wing position defects in a Drosophila model of oculopharyngeal muscular dystrophy (OPMD) when larvae are raised on medium containing doses ranging from 300 to 400 μM and in adults following dietary administration of 1-3 mM doses. 6-Aminophenanthridine also reduces muscle degeneration and decreases the number of nuclear inclusions in thoracic muscle in a Drosophila model of OPMD.