Salubrinal is a selective inhibitor of endoplasmic reticulum (ER) stress and affords remarkable protection to cardiomyocytes.
By studying the structure–activity relationship (SAR) of salubrinal, it was found that modification of the quinoline ring terminus and
thiourea unit could confer the compound PP1-24 with markedly enhanced cardioprotective activity (EC50 ≤ 0.3 μM) that is 50-fold more
potent than salubrinal. Comparative molecular field analysis (CoMFA) was performed using the obtained biological data and resulted in a
statistically significant CoMFA model with high predictive power (q2 = 0.741, r2 = 0.991).
Keywords: Cardiomyocytes protection, UPR, endoplasmic reticulum (ER) stress, eukaryotic translation initiation factor 2 subunit α (eIF2α)
phosphorylation, PP1/GADD34 complex inhibitor, salubrinal, structure–activity relationships (SAR), MTT, CoMFA model, predicted abilities.
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