aromatic-L-amino酸卡比多巴脱羧酶抑制剂是选择性的细胞毒性对人体肺类癌和小细胞肺癌细胞。
文章的细节
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引用
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吉尔伯特是的,弗雷德里克LM,艾姆斯毫米
aromatic-L-amino酸卡比多巴脱羧酶抑制剂是选择性的细胞毒性对人体肺类癌和小细胞肺癌细胞。
癌症研究杂志2000年11月,6 (11):4365 - 72。
- PubMed ID
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11106255 (在PubMed]
- 文摘
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类癌肿瘤是一种罕见的神经内分泌肿瘤的特点是过度生产5 -羟色胺。在研究色氨酸羟化酶动力学和aromatic-L-amino酸脱羧酶(AAAD)在人类类癌肝转移和相邻的正常肝学生物化学”(j·a·吉尔伯特et al。杂志。(50岁):845 - 850,1995),我们确定了一个重大的区别:良性肿瘤的Vmax AAAD 50倍高于正常肝。在这里,我们报告北方和西方的分析检测大量AAAD多肽和mRNA在人类良性肿瘤的主要转移性肿瘤与周围正常组织。评估的可行性,针对这些高AAAD水平化疗,AAAD抑制剂卡比多巴(alpha-methyl-dopahydrazine) alpha-monofluoromethyldopa (MFMD)和3-hydroxybenzylhydrazine (nsd - 1015) (72 h)与孵化NCI-H727人类肺良性肿瘤的细胞。卡比多巴和MFMD致命(IC50 = 29 + / - 2 microM 56 + / - 6 microM,分别);nsd - 1015没有对扩散的影响。暴露于其他人类肿瘤行,卡比多巴是致命的唯一NCI-H146和NCI-H209小细胞肺癌(SCLC)行(IC50 = 12 + / - 1 microM 22 + / - 5 microM,分别)。卡比多巴(100 microM)增长下降(但没有杀死)SK-N-SH神经母细胞瘤和A204横纹肌肉瘤细胞并不影响扩散DU 145前列腺癌,乳腺癌MCF7或NCI-H460肺大细胞癌行。 The rank order of lines by AAAD activity was NCI-H146 > NCI-H209 > SK-N-SH > NCI-H727, whereas A204, DU 145, MCF7, and NCI-H460 had no measurable activity. For lung tumor lines (carcinoid, two SCLC, and one large cell lung carcinoma), AAAD activity was correlated with the potency of carbidopa-induced cytotoxicity. However, carcinoid cell death was not solely attributable to complete inhibition of either AAAD activity or the serotonin synthetic pathway. In further evaluating potential applications of these findings with carbidopa, we determined that sublethal doses of carbidopa produced additive cytotoxic effects in carcinoid cells in combination with etoposide and cytotoxic synergy in SCLC cells when coincubated with topotecan.
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- 药物
- 药物靶点
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药物 目标 类 生物 药理作用 行动 卡比多巴 Aromatic-L-amino-acid脱羧酶 蛋白质 人类 是的抑制剂细节