Nonsteroidal anti-inflammatory drugs potentiate 1-methyl-4-phenylpyridinium (MPP+)-induced cell death by promoting the intracellular accumulation of MPP+ in PC12 cells

被引:19
作者
Morioka, N
Kumagai, K
Morita, K
Kitayama, S
Dohi, T
机构
[1] Hiroshima Univ, Grad Sch Biomed Sci, Dept Dent Pharmacol, Div Integrated Med Sci, Hiroshima, Japan
[2] Okayama Univ, Grad Sch Med & Dent, Branch Biophysiol Sci, Field Funct Physiol,Dept Dent Pharmacol, Okayama 7008530, Japan
关键词
D O I
10.1124/jpet.104.065300
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
In this study, we investigated the effects of nonsteroidal anti-inflammatory drugs ( NSAIDs) on 1-methyl-4-phenylpyridinium (MPP+)-induced cell death in PC12 cells. Coincubation of PC12 cells with indomethacin, ibuprofen, ketoprofen, or diclofenac, but not aspirin or N-[2-(cyclohexyloxy)-4-nitrophenyl]methanosulfonamide (NS-398), significantly potentiated the MPP+-induced cell death. In contrast, these NSAIDs had no effect on rotenone-induced cell death. The potentiating actions of these NSAIDs were not suppressed by treatment with phenyl-N-butylnitrone, a radical scavenger; N-acetyl-L-cysteine, an antioxidant; Ac-DEVD-CHO, a selective caspase-3 inhibitor; or 2-chloro-5-nitro-N-phenylbenzamide (GW9662), a selective antagonist of peroxisome proliferator-activated receptor gamma. Furthermore, we observed that DNA fragmentation, which is one of the hallmarks of apoptosis, was not induced by coincubation with MPP+ and NSAIDs. We confirmed that coincubation of PC12 cells with 30 muM MPP+ and 100 muM indomethacin, ibuprofen, ketoprofen, or diclofenac led to a significant increase in the accumulation of intracellular MPP+ compared with incubation with 30 muM MPP+ alone. In addition, these NSAIDs markedly reduced the efflux of MPP+ from PC12 cells. (3-(3(2-(7-Chloro-2-quinolinyl)ethenyl)phenyl((3-dimethyl amino-3oxo-propyl) thio) methyl) propanoic acid (MK 571), which is an inhibitor of multidrug resistance proteins (MRPs), mimicked the NSAIDs-induced effects, increasing cell toxicity and promoting the accumulation of MPP+. Moreover, some types of MRPs' mRNA were detected in PC12 cells. These results suggest that some NSAIDs might cause a significant increase in the intracellular accumulation of MPP+ via the suppression of reverse transport by the blockade of MRP, resulting in the potentiation of MPP+-induced cell death.
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页码:800 / 807
页数:8
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