Abstract：
:Pyrrolidine dithiocarbamate (PDTC) can form a complex with metal ions and then act as a proteasome inhibitor, which leads to tumor cell apoptosis, and could therefore be developed as an anticancer agent. In our efforts to find factors that induce PDTC-mediated apoptosis of tumor cells, the effect of serum concentration on the apoptotic activity of PDTC was investigated. PDTC could not induce MCF-7 breast tumor cell death in serum-free media but significantly induced cell death in a dose-dependent manner at concentrations of ≥25 μM in media containing 10% fetal bovine serum. PDTC-mediated cell death was also dependent on serum concentration. PDTC-mediated cell death occurred through apoptosis. Similar to that in normal FBS, PDTC-mediated apoptotic cell death was also induced in media containing dialyzed FBS, indicating that PDTC-mediated apoptosis does not require metal ions or salts, but rather proteins in fetal bovine serum. In addition, differential apoptotic effects of PDTC were not observed with inhibitors of NF-κB activation such as N-acetylcysteine (NAC), Fenofibrate and carbobenzoxyl-l-leucyl-l-leucyl-l-leucinal (MG132) or with the metal-binding agent, 5-chloro-7-iodo-8-hydroxyquinoline (Clioquinol). These results indicate that serum is required for PDTC-mediated apoptosis and that zinc-binding compounds such as PDTC, N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) and Clioquinol may each have their own mechanisms by which they induce tumor cell death, even though they are all classified as zinc-binding compounds.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Oh DH,Bang JS,Choi HM,Yang HI,Yoo MC,Kim KSdoi
10.1016/j.ejphar.2010.09.048subject
Has Abstractpub_date
2010-12-15 00:00:00pages
135-9issue
1-3eissn
0014-2999issn
1879-0712pii
S0014-2999(10)00933-7journal_volume
649pub_type
杂志文章abstract：:18-Methoxycoronaridine, a novel iboga alkaloid congener that decreases drug self-administration in several animal models, may be a potential treatment for multiple forms of drug abuse. In previous work, 18-methoxycoronaridine was found to be a somewhat selective antagonist at alpha3beta4 nicotinic receptors; and low d...
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