[关键词]
[摘要]
目的 探讨木鳖子Momrodica cochinchinensis中单体化合物,尤其是对羟基桂皮醛诱导黑素瘤B16细胞分化的作用。方法 以对羟基桂皮醛、松柏醛、对羟基苯甲醛、3-甲氧基对羟基苯甲醛和ligballinol处理B16细胞48 h后,磺酰罗丹明B(SRB)法检测细胞生长抑制率。以对羟基桂皮醛处理B16细胞24、48、72 h后,倒置相差显微镜和经瑞氏-吉姆萨染色法观察细胞形态;比色法检测给药后48 h B16细胞中黑色素量和酪氨酸酶活性;RT-PCR法检测酪氨酸酶基因表达。结果 5个单体化合物对B16细胞生长均具有抑制作用,其中对羟基桂皮醛对细胞生长的抑制作用最为明显,且具有浓度和时间相关性。对羟基桂皮醛处理B16细胞48 h后,经染色观察到细胞呈树突样生长,表现为典型的细胞分化形态特征,黑色素的量显著增加,酪氨酸酶活性显著增强,上述作用与对照组相比差异显著(P<0.05)。以对羟基桂皮醛处理B16细胞6、12、24 h后,酪氨酸酶、酪氨酸相关蛋白-1和酪氨酸相关蛋白-2的基因表达明显上调(P<0.01),且呈时间相关性。结论 对羟基桂皮醛能够抑制黑素瘤B16细胞增殖,其机制与诱导B16细胞分化相关。
[Key word]
[Abstract]
Objective To explore the monomer compounds in the seeds of Momrodica cochinchinensis and to study the differentiation of mouse melanoma B16 cells induced by p-hydroxylcinnamaldehyde (PHC). Methods After being treated by five kinds of compounds [PHC, coniferylaldehyde, p-hydroxylbenzaldehyde (PHB), 3-O-methoxyaniline-p-hydroxylbenzaldehyde, and ligballinol] for 48 h, the inhibitory rate of B16 cell growth was measured by sulforhadamine B (SRB); Morphological changes of B16 cells induced by PHC for 24, 48, and 72 h were observed by Giemsa staining and phase contrast microscope; Melanin content and the activity of tyrosinase in B16 cells 48 h after the administration were assessed by colorimeter. The expression of tyrosinase mRNA was detected by RT-PCR. Results All the five compounds had the inhibitory effect on the B16 cells. Among them, PHC showed the strongest effect in the dose- and time-dependent manner; PHC could induce B16 cells dendritic growth 48 h after the treatment, and the morphological changes were typically differentiated; PHC also increased the melanin production and the activity of tyrosinase. There was a significant difference compared to the control group (P < 0.05). After treated by PHC for 6, 12, and 24 h, the expression levels of tyrosinase mRNA, tyrosinase 1 mRNA, and tyrosinase 2 mRNA were significantly increased (P < 0.01) in a time-dependent manner. Conclusion PHC could inhibit the proliferation of B16 cells and the mechanism is related to the differentiation of B16 cells.
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[基金项目]
河北省卫生厅医学科学研究重要课题计划(20120120)