1.上海中医药大学附属曙光医院肿瘤科/肿瘤研究室(上海 201203)
李玲,女,硕士研究生,主要从事中西医结合防治消化道肿瘤的临床研究工作
季青,研究员,博士研究生导师;E-mail:ttt99118@hotmail.com。
周晶,博士后;E-mail:jzhoudr@163.com。
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李玲,季青,周晶.黄芪甲苷调控外泌体介导的JMJD3/H3K27me3/OPN通路抗结直肠癌肝转移机制研究[J].上海中医药杂志,2023,57(11):42-49.
LI Ling,JI Qing,ZHOU Jing.Mechanism of Astragaloside Ⅳ regulates extracellular vesicles⁃mediated JMJD3/H3K27me3/OPN pathway against colorectal cancer liver metastasis[J].Shanghai Journal of Traditional Chinese Medicine,2023,57(11):42-49.
李玲,季青,周晶.黄芪甲苷调控外泌体介导的JMJD3/H3K27me3/OPN通路抗结直肠癌肝转移机制研究[J].上海中医药杂志,2023,57(11):42-49. DOI: 10.16305/j.1007-1334.2023.2308044.
LI Ling,JI Qing,ZHOU Jing.Mechanism of Astragaloside Ⅳ regulates extracellular vesicles⁃mediated JMJD3/H3K27me3/OPN pathway against colorectal cancer liver metastasis[J].Shanghai Journal of Traditional Chinese Medicine,2023,57(11):42-49. DOI: 10.16305/j.1007-1334.2023.2308044.
目的,2,研究黄芪甲苷(ASⅣ)抑制结直肠癌肝转移的作用机制,探索ASⅣ对外泌体介导的Jumonji结构域包含蛋白3(JMJD3)/第27位的赖氨酸三甲基化的组蛋白H3(H3K27me3)/骨桥蛋白(OPN)信号通路的影响。,方法,2,取对数生长期的MC38细胞,超速离心法提取MC38细胞外泌体(MC38-EVs)及ASⅣ干预后MC38细胞外泌体(ASⅣ/MC38-EVs),粒径鉴定后用于动物实验。选取C57BL/6J小鼠15只,建立结直肠癌原位肝转移模型后,按照随机数字表法分为模型组、MC38-EVs组、ASⅣ/MC38-EVs组,每组5只。模型组造模前1周尾静脉注射磷酸盐缓冲液(PBS),100 μL/次,隔日1次,连续3周;MC38-EVs组和ASⅣ/MC38-EVs组造模前1周尾静脉分别注射0.1 g/L的MC38-EVs、ASⅣ/MC38-EVs,100 μL/次,隔日1次,连续3周。4周后处死小鼠,观察结直肠癌肝转移情况;苏木精-伊红(HE)染色法观察肝转移灶病理学改变;蛋白质免疫印迹(Western blot)法检测肝转移灶中JMJD3、H3K27me3、OPN蛋白表达情况;免疫荧光法检测肝转移灶中F4/80,+,、CD206,+,巨噬细胞的浸润和JMJD3、H3K27me3、OPN蛋白表达;实时荧光定量逆转录聚合酶链式反应(RT-qPCR)检测瘤体中,JMJD3,、,OPN, mRNA表达。,结果,2,与模型组比较,MC38-EVs组肝转移灶数目和肝脏质量明显增加(,P,<,0.05);与MC38-EVs组比较,ASⅣ/MC38-EVs组肝转移灶数目和肝脏质量明显减少(,P,<,0.05);免疫荧光结果显示,与模型组比较,MC38-EVs组中肝组织F4/80,+,、CD206,+,巨噬细胞浸润程度明显升高(,P,<,0.05);与MC38-EVs组比较,ASⅣ/MC38-EVs组中肝组织巨噬细胞浸润程度明显降低(,P,<,0.05);Western blot、RT-qPCR和免疫荧光结果显示,与模型组比较,MC38-EVs组JMJD3、OPN蛋白和mRNA表达水平明显升高(,P,<,0.05),H3K27me3蛋白表达水平明显降低(,P,<,0.05);与MC38-EVs组相比,ASⅣ/MC38-EVs组JMJD3、OPN蛋白和mRNA表达水平明显降低(,P,<,0.05),H3K27me3蛋白表达水平明显升高(,P,<,0.05)。,结论,2,ASⅣ能够有效抑制结直肠癌肝转移,其机制与调控外泌体介导的JMJD3/H3K27me3/OPN通路激活相关。
Objective,2,To explore the mechanism of Astragaloside Ⅳ (ASⅣ) in inhibiting colorectal cancer liver metastasis and to investigate the effect of ASⅣ on extracellular vesicle-mediated Jumonji domain-containing protein-3 (JMJD3) /trimethylated histone H3 at lysine 27 (H3K27me3)/osteopontin (OPN) signaling pathway.,Methods,2,MC38 cells at the logarithmic growth stage were taken, and MC38 cell extracellular vesicles (MC38-EVs) and MC38 cell extracellular vesicles after ASⅣ intervention (ASⅣ/MC38-EVs) were extracted by ultracentrifugation, and the particle size was identified and used for animal experiments. After establishing the orthotopic liver metastasis model of colorectal cancer, fifteen C57BL/6J mice were randomly divided into model group, MC38-EVs group and ASⅣ/MC38-EVs group, with 5 animals in each group. The model group was injected with PBS in the tail vein 1 week before modeling, 100 μL per time, every other day for 3 weeks; the MC38-EVs group and the ASⅣ/MC38-EVs group were injected with 0.1 g/L,100 μL per time MC38-EVs and ASⅣ/MC38-EVs in the tail vein 1 week before modeling respectively, every other day for 3 weeks.The mice were executed after 4 weeks to observe the liver metastases of colorectal cancer; HE staining was performed to observe the pathological changes of liver metastases; Western blot was performed to detect the expression of JMJD3, H3K27me3 and OPN in liver metastases; immunofluorescence was performed to detect the infiltration of F4/80,+,,CD206,+ ,macrophages and the expression of JMJD3, H3K27me3, and OPN in liver metastases; RT-qPCR detected ,JMJD3,, ,OPN, mRNA expression in the tumor.,Results,2,The number of metastases and weight of liver were significantly higher in the MC38-EVs group compared with the model group (,P,<,0.05), while those were significantly lower in the ASⅣ/MC38-EVs group compared with the MC38-EVs group (,P,<,0.05); the immunofluorescence results showed that the extent of F4/80,+,,CD206,+, macrophage infiltration in liver tissue was significantly higher in the MC38-EVs group compared with the model group (,P,<,0.05), but that was significantly lower in the ASⅣ/MC38-EVs group compared with the MC38-EVs group (,P,<,0.05); Western blot, RT-qPCR and immunofluorescence results showed that the expression levels of JMJD3 and OPN proteins and mRNA were significantly higher (,P,<,0.05) and H3K27me3 protein expression level was significantly lower (,P,<,0.05) in the MC38-EVs group compared with the model group. Compared with the MC38-EVs group, JMJD3 and OPN protein and the mRNA expression levels were significantly lower (,P,<,0.05) and H3K27me3 protein expression level was significantly higher (,P,<,0.05) in the ASⅣ/MC38-EVs group.,Conclusion,2,ASⅣ can effectively inhibit liver metastasis of colorectal cancer by a mechanism related to the regulation of extracellular vesicle-mediated activation of the JMJD3/H3K27me3/OPN pathway.
结直肠癌肿瘤转移黄芪甲苷外泌体肿瘤相关巨噬细胞中药药理作用
colorectal cancercancer metastasisAstragaloside Ⅳextracellular vesiclestumor associated macrophagestraditional Chinese herbal medicinepharmacological action
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