Extended knowledge of 837-52-5

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Ma, Rui; Guo, Dong-Xiao; Li, Hui-Fen; Liu, Hui-Xiang; Zhang, Yun-Rui; Ji, Jian-Bo; Xing, Jie; Wang, Shu-Qi published the article 《Spectroscopic methodologies and molecular docking studies on the interaction of antimalarial drug piperaquine and its metabolites with human serum albumin》. Keywords: spectroscopy mol docking piperaquine metabolite interaction human serum albumin; Human serum albumin (HSA); Interaction; Metabolites; Molecular docking; Piperaquine.They researched the compound: 7-Chloro-4-(piperazin-1-yl)quinoline( cas:837-52-5 ).Application of 837-52-5. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:837-52-5) here.

Artemisinin-based combination therapy is widely used for the treatment of uncomplicated Plasmodium falciparum malaria, and piperaquine (PQ) is one of the important partner drugs. During the biotransformation of PQ, M1 (N-oxidation product), M2 (N-oxidation product), M3 (carboxylic acid product), M4 (N-dealkylation product), and M5 (N-oxidated product of M4) are formed by cytochrome P 450 pathways. Despite decades of clin. use, the interactions between PQ and its main metabolites (PQs) with human serum albumin (HSA) have not been reported. In the present study, the binding of PQs with HSA under physiol. conditions was investigated systematically through fluorescence, CD spectroscopy, and mol. docking methods. The exptl. results show that the intrinsic fluorescence quenching of HSA was induced by those compounds resulting from the formation of stable HSA-compound complexes. The main forces involved in the interactions between PQ, M1, and M2 which bind to HSA were hydrogen s and van der Waals forces, while the interactions of M3, M4, and M5 were driven by hydrophobic forces. The main binding sites of the compounds to HSA were also examined by classical fluorescent marker experiments and mol. docking studies. Binding constants (Kb) revealed that the affinities of the PQ, M1, M2, M3, and M4 to HSA were stronger than that of M5. Addnl., the binding rates of PQs with HSA were determined by ultrafiltration methods. Consistent with the binding constant results, the binding rate of M5 was lower than the binding rates of PQ, M1, M2, M3, and M4. Furthermore, PQs binding to HSA led to conformational and structural alterations of HSA, as revealed by multi-spectroscopic studies. In order to investigate one possible mechanism by which PQs inhibit the growth of malaria-causing Plasmodium parasites, 1H NMR spectroscopy was performed to investigate the interaction of the PQs with heme. This study is beneficial to enhance our understanding of the ecotoxicol. and environmental behaviors of PQ and its metabolites.

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Reference:
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bromide – Wiktionary