摘要
目的神经母细胞瘤是4岁以下儿童最常见的恶性实体肿瘤,MYCN基因的高表达导致预后更加恶劣。苦参碱作为中药苦参的重要成分对多种肿瘤有治疗作用,该实验拟应用苦参碱作用神经母细胞瘤细胞(LA-N-5),对肿瘤细胞增殖及MYCN基因mRNA表达受抑制情况进行初步研究,希望可以为神经母细胞瘤的治疗开拓新的思路。方法以终浓度为0.25mg/mL,0.50mg/mL,0.75mg/mL,1.00mg/mL苦参碱作用神经母细胞瘤LA-N-5细胞,MTT法检测LA-N-5细胞增殖情况变化,采用SYBR绿色荧光染料Ⅰ的实时荧光定量RT-PCR检测MYCN基因mRNA表达受抑制情况。结果苦参碱对LA-N-5细胞增殖的抑制呈明显的剂量、时间依赖性,随剂量的增加,作用时间的延长,抑制效果逐渐加强。1.00mg/mL作用72h后肿瘤细胞增殖抑制效率达36.3%,单细胞MYCN基因mRNA表达9.7±0.35拷贝,抑制效率达44.6%。结论应用苦参碱在体外环境作用LA-N-5细胞,可以有效抑制该细胞的增殖、原癌基因MYCN mRNA的表达,为临床上神经母细胞瘤的治疗开拓了新的思路。
Objective Neuroblastoma is the most common malignant solid tumor in children under 4 years. Amplification of MYCN oncogene is associated with advanced-stage disease, rapid tumor progression, resistance to treatment, and poor outcome. Matirne has the anti-tumor activity. This study was designed to investigate the effects of matrine on LA-N-5 cell line proliferation and MYCN gene mRNA expression. Methods Neuroblastoma LA-N-5 cells were treated by 0. 25 ,0. 50,0. 75 or 1.00 mg/mL matrine. MTr was used to measure the levels of the proliferation of LA-N-5 cells cultured with different concentrations of matrine. MYCN gene mRNA expression in LA-N-5 cells was measured using real time RT-PCR with SYBR GREEN I fluorescence. Results The proliferation of LA-N-5 cells was obviously inhibited by matrine in a dose- and time-dependent manner. Matrine of 1.00 mg/mL treatment for 72 hrs produced a best effect, with an inhibitory rate of LA-N-5 cell proliferation of 36.3% and an inhibitory rate of MYCN gene mRNA expression of 44.6%. Conclusions Matrine may inhibit the growth of neuroblastoma cells and down-regnlate MYCN mRNA expression. It may be promising as a new drug for treatment of neuroblastoma.
出处
《中国当代儿科杂志》
CAS
CSCD
2008年第2期225-227,共3页
Chinese Journal of Contemporary Pediatrics
