The number of deaths or critical health issues is a threat in the infection caused by Dengue virus, which complicates the situation, as only symptomatic treatment is the current solution. In this regard we have targeted the dengue protease NS2B-NS3 that is responsible for the replication. The series was designed with the help of molecular modeling approach using docking protocols. The series comprised of different scaffolds viz. cinnamic acid analogs (CA1–CA11), chalcone (C1–C10) and their molecular hybrids (Lik1–Lik10), analogs of benzimidazole (BZ1-BZ5), mercaptobenzimidazole (BS1-BS4), and phenylsulfanylmethylbenzimidazole (PS1-PS4). Virtual screening of various natural phytoconstituents was employed to determine the interactions of designed analogs with the residues of catalytic triad in the active site of NS2B-NS3. We have further synthesized the selected leads. The synthesized analogs were evaluated for the cytotoxicity and NS2B-NS3 protease inhibition activity and compared with known anti-dengue natural phytoconstituent quercetin as the standard. CA2, BZ1, and BS2 were found to be more potent and efficacious than the standard quercetin as evident from the protease inhibition assay.

死亡人数或严重的健康问题是由登革热病毒引起的感染的威胁，这使情况变得复杂，因为目前仅对症治疗是解决方案。在这方面，我们已针对负责复制的登革热蛋白酶NS2B-NS3。该系列是在使用对接规程的分子建模方法的帮助下设计的。该系列由不同的支架组成。肉桂酸类似物（CA1-CA11），查尔酮（C1-C10）及其分子杂种（Lik1-Lik10），苯并咪唑（BZ1-BZ5），巯基苯并咪唑（BS1-BS4）和苯硫烷基甲基苯并咪唑（PS1-PS4）类似物。虚拟筛选各种天然植物成分被用于确定设计的类似物与NS2B-NS3活性位点催化三联体残基的相互作用。我们进一步综合了选定的线索。评价合成的类似物的细胞毒性和NS2B-NS3蛋白酶抑制活性，并与已知的抗登革热天然植物成分槲皮素作标准比较。从蛋白酶抑制试验中可以看出，CA2，BZ1和BS2比标准槲皮素更有效和有效。