Reaction of Dehydropyrrolizidine Alkaloids with Valine and Hemoglobin
作者:Yuewei Zhao、Shuguang Wang、Qingsu Xia、Gonçalo Gamboa da Costa、Daniel R. Doerge、Lining Cai、Peter P. Fu
DOI:10.1021/tx5002139
日期:2014.10.20
Pyrrolizidine alkaloids exert toxicity through metabolism to dehydropyrrolizidine alkaloids that bind to cellular protein and DNA, leading to hepatotoxicity, genotoxicity, and tumorigenicity. To date, it is not clear how dehydropyrrolizidine alkaloids bind to cellular constituents, including amino acids and proteins, resulting in toxicity. Metabolism of carcinogenic monocrotaline, riddelliine, and heliotrine
Human Liver Microsomal Metabolism and DNA Adduct Formation of the Tumorigenic Pyrrolizidine Alkaloid, Riddelliine
作者:Qingsu Xia、Ming W. Chou、Fred. F. Kadlubar、Po-Cheun Chan、Peter P. Fu
DOI:10.1021/tx025605i
日期:2003.1.1
obtained from rat livermicrosomalmetabolism. When metabolism was conducted in the presence of calf thymus DNA, the same set of eight DHP-derived DNAadducts was formed. Both the metabolism pattern and DNAadduct profile were very similar to those obtained from rat liver microsomes. When metabolism was conducted in the presence of the P450 3A4 enzyme inhibitor triacetyleandomycin, the formation of DHP and
利得利宁是一种广泛存在的天然遗传毒性吡咯烷啶生物碱,在一项为期2年的NTP致癌生物测定法中,可在大鼠和小鼠中诱发肝脏肿瘤。我们已经确定,riddelliine通过遗传毒性机制诱导大鼠肝肿瘤,该机制涉及(+/-)-6,7-dihydro-7-hydroxy-1-hydroxymethyl-5H-pyrrolizine(DHP)的形成,该反应与DNA发生反应。形成一组八个DNA加合物。为了确定在实验动物中获得的结果与人的相关性,使用人肝微粒体进行了riddelliine的代谢。与大鼠肝微粒体一样,DHP和riddelliine N-氧化物是与人肝微粒体温育的主要代谢产物。DHP和riddelliine N-氧化物的水平分别为0.20-0.62和0.03-0.15 nmol / min / mg蛋白,与从大鼠肝脏微粒体代谢中获得的代谢物相当。当在小牛胸腺DNA的存在下进行新陈代谢时,会形成同一组
WINTER, CARL K.;SEGALL, H. J.;JONES, A. DANIEL, BIOMED. AND ENVIRON. MASS SPECTROM., 15,(1988) N 5, 265-273
作者:WINTER, CARL K.、SEGALL, H. J.、JONES, A. DANIEL
DOI:——
日期:——
Multi-stage stem cell carcinogenesis
申请人:Krtolica Ana
公开号:US20100162416A1
公开(公告)日:2010-06-24
The present invention relates to a system of multi-stage stem cell carcinogenesis and a method of generating such multi-stage stem cell carcinogenesis system. Various stages of cancer stem cells can be generated from normal stem cells via mutagenesis. The system of the present invention enables monitoring changes in the ability of cells to transition from one stage of carcinogenesis to another and to identify genetic pathways and molecules that influence carcinogenesis. The present invention also enables a high-throughput and nonbiased screening for targets that preferentially affect cancer stem cells relative to non-cancer stem cells or their derivatives during stem cell carcinogenesis, thus is useful in developing anti-cancer therapeutics.
[EN] MULTI-STAGE STEM CELL CARCINOGENESIS<br/>[FR] CARCINOGENESE DE CELLULES SOUCHES MULTIETAPES
申请人:STEMLIFELINE INC
公开号:WO2010037134A2
公开(公告)日:2010-04-01
The present invention relates to a system of multi-stage stem cell carcinogenesis and a method of generating such multi-stage stem cell carcinogenesis system. Various stages of cancer stem cells can be generated from normal stem cells via mutagenesis. The system of the present invention enables monitoring changes in the ability of cells to transition from one stage of carcinogenesis to another and to identify genetic pathways and molecules that influence carcinogenesis. The present invention also enables a high-throughput and nonbiased screening for targets that preferentially affect cancer stem cells relative to non-cancer stem cells or their derivatives during stem cell carcinogenesis, thus is useful in developing anti-cancer therapeutics.