کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1357780 981276 2015 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identification of novel class of falcipain-2 inhibitors as potential antimalarial agents
ترجمه فارسی عنوان
شناسایی کلاس جدید مهارکننده های فالسیپین-2 به عنوان عوامل بالقوه ضد مالاریا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

Falcipain-2 is a papain family cysteine protease and an emerging antimalarial drug target. A pseudo-tripeptide scaffold I was designed using in silico screening tools and the three dimensional structures of falcipain-2, falcipain-3, and papain. This scaffold was investigated at four positions, T1, T2, T3, and T3′, with various targeted substitutions to understand the structure–activity relationships. Inhibitor synthesis was accomplished by first obtaining the appropriate dipeptide precursors with common structural components. The pyrrolidine moiety introduced interesting rotamers in a number of synthesized molecules, which was confirmed using high-temperature 1H NMR spectroscopy. Among the synthesized compounds, 61, 62, and 66 inhibited falcipain-2 activity with inhibition constants (Ki) of 1.8 ± 1.1, 0.2 ± 0.1 and 7.0 ± 2.3 μM, respectively. A group of molecules with a pyrrolidine moiety at the T2 position (68, 70, 71, 72, and 73) also potently inhibited falcipain-2 activity (Ki = 0.4 ± 0.1, 2.5 ± 0.5, 3.3 ± 1.1, 7.5 ± 1.9, and 4.6 ± 0.7 μM, respectively). Overall, compound 74 exhibited potent anti-parasitic activity (IC50 = 0.9 ± 0.1 μM), corresponding with its inhibitory activity against falcipain-2, with a Ki of 1.1 ± 0.1 μM. Compounds 62 and 67 inhibited the growth of the drug resistant parasite Dd2 with better efficacy, and compound 74 exhibited a 7- to 12-fold higher potency against Dd2 and MCamp isolates, than the laboratory strain (3D7). These data suggest that this novel series of compounds should be further investigated as potential antimalarial agents.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioorganic & Medicinal Chemistry - Volume 23, Issue 9, 1 May 2015, Pages 2221–2240
نویسندگان
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