کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10584726 981347 2012 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A sulfoximine-based inhibitor of human asparagine synthetase kills l-asparaginase-resistant leukemia cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
A sulfoximine-based inhibitor of human asparagine synthetase kills l-asparaginase-resistant leukemia cells
چکیده انگلیسی
An adenylated sulfoximine transition-state analogue 1, which inhibits human asparagine synthetase (hASNS) with nanomolar potency, has been reported to suppress the proliferation of an l-asparagine amidohydrolase (ASNase)-resistant MOLT-4 leukemia cell line (MOLT-4R) when l-asparagine is depleted in the medium. We now report the synthesis and biological activity of two new sulfoximine analogues of 1 that have been studied as part of systematic efforts to identify compounds with improved cell permeability and/or metabolic stability. One of these new analogues, an amino sulfoximine 5 having no net charge at cellular pH, is a better hASNS inhibitor (KI∗ = 8 nM) than 1 and suppresses proliferation of MOLT-4R cells at 10-fold lower concentration (IC50 = 0.1 mM). More importantly, and in contrast to the lead compound 1, the presence of sulfoximine 5 at concentrations above 0.25 mM causes the death of MOLT-4R cells even when ASNase is absent in the culture medium. The amino sulfoximine 5 exhibits different dose-response behavior when incubated with an ASNase-sensitive MOLT-4 cell line (MOLT-4S), supporting the hypothesis that sulfoximine 5 exerts its effect by inhibiting hASNS in the cell. Our work provides further evidence for the idea that hASNS represents a chemotherapeutic target for the treatment of leukemia, and perhaps other cancers, including those of the prostate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioorganic & Medicinal Chemistry - Volume 20, Issue 19, 1 October 2012, Pages 5915-5927
نویسندگان
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