Ogura T, DeGeorge G, Tatemichi M, Esumi H
Investigative Treatment Division, National Cancer Center Research Institute East, Kashiwa, Chiba.
Jpn J Cancer Res. 1998 Feb;89(2):199-205. doi: 10.1111/j.1349-7006.1998.tb00549.x.
The propensity of a cell to undergo apoptosis has been proposed to be a determinant of sensitivity to anti-microtubule agents. The anti-microtubule agents vincristine and paclitaxel induce key features of apoptosis, such as intranucleosomal DNA fragmentation and changes in nuclear morphology in the human neuroblastoma cell line, NB-39-nu. Nitric oxide (NO) generated from NO-releasing drugs prevented anti-microtubule agent-induced apoptosis in this cell line. The mechanism of suppression of apoptosis by NO appears to be via the inhibition of an interleukin-1beta converting enzyme-like protease cascade. This finding reveals a new biological function of NO, as well as a new molecular insight into resistance to chemotherapy with anti-microtubule agents.
细胞发生凋亡的倾向被认为是对抗微管药物敏感性的一个决定因素。抗微管药物长春新碱和紫杉醇可诱导人神经母细胞瘤细胞系NB-39-nu出现凋亡的关键特征,如核小体间DNA片段化和核形态改变。释放一氧化氮(NO)的药物所产生的NO可阻止该细胞系中抗微管药物诱导的凋亡。NO抑制凋亡的机制似乎是通过抑制白细胞介素-1β转化酶样蛋白酶级联反应。这一发现揭示了NO的一种新的生物学功能,以及对使用抗微管药物进行化疗耐药性的新分子见解。