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Pyrrolidine dithiocarbamate induces bovine cerebral endothelial cell death by increasing the intracellular zinc level

 Chul Hoon Kim  ;  Joo Hee Kim  ;  Jan Xu  ;  Chung Y. Hsu  ;  Young Soo Ahn 
 Journal of Neurochemistry, Vol.72(4) : 1586-1592, 1999 
Journal Title
 Journal of Neurochemistry 
Issue Date
Animals ; Antioxidants/pharmacology* ; Calcium/pharmacology ; Cattle ; Cell Death/drug effects ; Cerebral Cortex/cytology ; Cerebral Cortex/metabolism* ; Chelating Agents/pharmacology ; Copper/pharmacology ; Copper Sulfate/pharmacology ; Edetic Acid/pharmacology ; Endothelium/cytology ; Endothelium/drug effects ; Endothelium/enzymology ; Ethylenediamines/pharmacology ; L-Lactate Dehydrogenase/metabolism ; Phenanthrolines/pharmacology ; Pyrrolidines/pharmacology* ; Thiocarbamates/pharmacology* ; Zinc/pharmacokinetics*
The antioxidant and metal-chelating effects of pyrrolidine dithiocarbamate (PDTC) have been extensively studied. PDTC prevents cell death induced by various insults. However, PDTC itself may cause cell death in selected experimental paradigms. PDTC induced bovine cerebral endothelial cell death. However, in serum-depleted medium, PDTC did not affect the cell viability, suggesting that certain factors in serum may mediate the cytotoxic effect of PDTC. The metal chelators bathocuproine disulfonic acid, o-phenanthroline, bathophenanthroline disulfonic acid, and N,N,N',N'-tetrakis(2-pyridyl-methyl)ethylenediamine (TPEN) prevented the cell death induced by PDTC. In a serum-deprived condition, addition of exogenous metals, copper or zinc, restored the cytotoxic effect of PDTC. These data indicate that metals such as copper or zinc in serum may mediate the cytotoxic effect of PDTC. The potency of zinc for PDTC-induced endothelial cell death was greater than that of copper. Zn-EDTA did not block PDTC-induced cell death, whereas Ca-EDTA and Cu-EDTA were able to prevent this PDTC effect. PDTC increased the intracellular fluorescence of the zinc probe dye N-(6-methoxy-8-quinolyl)-p-toluenesulfonamide, which was quenched by TPEN or various EDTA preparations but not by Zn-EDTA. Results suggest that an increase in intracellular zinc concentration is required in PDTC-induced cerebral endothelial cell death.
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Pharmacology (약리학교실) > 1. Journal Papers
Yonsei Authors
Kim, Chul Hoon(김철훈) ORCID logo https://orcid.org/0000-0002-7360-429X
Ahn, Young Soo(안영수)
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