基于转录组学分析复方胆草颗粒对非酒精性脂肪性肝炎小鼠肝细胞凋亡的影响
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1.上海中医药大学附属曙光医院;2.新乡医学院

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]:上海市科委创新项目(No. 19401901500)


Transcriptomics-based analysis of the effect of CompoundDancaoGranules on hepatocyte apoptosis in mice with non-alcoholic steatohepatitis
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1.Shuguang Hospital affiliated to Shanghai University of Traditional Chinese Medicine;2.Xinxiang Medical College

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the Shanghai Science and Technology Commission innovation project(No. 19401901500)

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    摘要:

    目的 通过转录组测序技术(RNA-seq)分析复方胆草颗粒干预高脂饲料复合四氯化碳(CCl4)诱导的非酒精性脂肪性肝炎的作用机制。方法 45只雄性C57BL/6小鼠随机分为正常对照组、模型对照组、奥贝胆酸组(10 mg/kg/d )、复方胆草颗粒低、高剂量组(10.71g生药/kg/d、21.42g生药/kg/d),每组9只。正常对照组喂养普通饲料,模型各组小鼠给予高脂饲料并复合CC14皮下注射,首次100% CC14溶液(4 mL/kg),之后40% CC14-橄榄油溶液(2 mL/kg),每周2次,共6周。各药物组从第3周开始给药,共给药4周。末次给药12h后,取各组小鼠血清和肝脏组织,生化试剂盒检测小鼠血清肝功能;苏木素-伊红(HE)、天狼猩红及油红O染色观察小鼠肝组织病理学变化;应用RNA-seq分析差异基因并进行功能富集分析、采用实时荧光定量聚合酶链式反应(Real-time PCR)验证差异基因 mRNA的表达,再以TdT-mediated dUTP Nick-End Labeling(TUNEL)染色检测凋亡情况。结果 与正常对照组比较,模型对照组小鼠血清谷丙转氨酶(ALT)、总胆固醇(TC)、谷草转氨酶(AST)、甘油三酯(TG)水平均明显升高(P <0. 01),肝组织炎性细胞浸润明显,汇管区及小叶间胶原沉积,油红染色显示红色脂滴面积显著增加(P < 0.01);与模型对照组比较,复方胆草颗粒组和奥贝胆酸组小鼠ALT、AST、TC和TG水平显著降低(P < 0.01),肝脏组织炎性细胞浸润,汇管区及小叶间胶原沉积和红色脂滴面积减少(P < 0.01)。RNA-seq测序结果显示,正常对照组与模型对照组差异表达的基因共2819个,上调基因543个,下调基因2276个;模型对照组与复方胆草颗粒组差异表达的基因共240个,上调基因206个,下调基因34个。两组交集基因221个,功能富集主要集中在细胞周期(CDT1, PLK1, BUB1B, TTK, KNL1, ESCO2, CDC6, NDC80, CDC25B, SGO1, CCNB2, ESPL1, CCNE1, MCM4, MCM5, FBXO5, BUB1, MCM2),凋亡(Caspase-3,Bax,P53,Apaf1,Bak,Caspase-8),p53信号通路(P53, CCNB2, APAF1, BAK, BAX, GTSE1, CASPASE-3, CCNE1),花生四烯酸代谢通路(HPGDS, CYP2C54, CYP2B10, TBXAS1, CYP2C50),半乳糖代谢(HK3, GLA, HK2, AKR1B7)等信号通路。RNA-seq测序分析发现复方胆草颗粒主要调控凋亡信号通路,并以定量PCR证实:相较于正常对照组,模型对照组肝组织Caspase-3,Bax,P53,Apaf1,Bak和Caspase-8 mRNA mRNA表达明显升高(P < 0.05);与模型对照组比较,复方胆草颗粒组肝组织Caspase-3,Bax,P53,Apaf1,Bak和Caspase-8 mRNA表达明显降低(P < 0.01);TUNEL染色结果表明复方胆草颗粒给药组肝细胞细胞核固缩及凋亡小体数量减少(P < 0.01)。结论 复方胆草颗粒对高脂饲料复合CCl4所致非酒精性脂肪性肝炎具有显著的保护作用,其作用机制可能与调节凋亡相关基因有关。

    Abstract:

    Objective Transcriptome sequencing technology (RNA-seq) was used to analyze the mechanism of compound Dancao granules in the intervention of high-fat feed combined with carbon tetrachloride (CCl4) induced non-alcoholic steatohepatitis. Methods 45 male C57BL/6 mice were split into two groups at random: normal control group,model control group, obeccholic acid group (10mg/kg/d), Compound Dancao Granules low and high dose groups (10.71g/kg/d, 21.42g/kg/d), with 9 mice in each group. Normal diet was served to the control group, and the mice in the model group were given high-fat diet combined with subcutaneous injection of CC14, 100%CC14 solution (4mL/kg) for the first time, and 40% CC14-olive oil solution (2mL/kg) for the second time, twice a week for a total of 6 weeks. Each drug group was administered from week 3 for a total of 4 weeks. 12h after the last administration, serum and liver tissues of mice in each group were collected and biochemical kit was used to detect serum liver function. Hematoxylin-eosin (HE), Sirius scarlet, and oil red O stainings were used to examine the histopathological changes of the liver. Differential genes were analyzed by RNA-seq and performed functional enrichment analysis, in order to verify the expression of differential gene mRNA, the quantitative real-time polymerase chain reaction was used, and TDT-media atedDuTPnick-endlabeling (TUNEL) staining was used to identify the apoptosis. Results Model control groups had significantly higher levels of serum alanine aminotransferase(ALT), aspartate aminotransferase(AST), total cholesterol(TC), and triglycerides(TG) than normal controls. (P < 0.01). Additionally, There was obvious inflammatory cell infiltration in liver tissue, collagen deposition in sink area and interlobule, and significant increase in lipid droplet area (P<0.01)..The levels of TC, TG, ALT, and AST were significantly lower in the groups receiving compound Dancao granules and obeccholic acid than in the model control group. (P < 0.01), inflammatory cell infiltration, collagen deposition and fat accumulation in the sink area and interlobule were improved (P<0.01). RNA-seq sequencing results showed that 2819 genes in the normal control group were differentially expressed compared with the model control group, 543 up-regulated genes and 2276 down-regulated genes. Between the model control group and the compound Dancao granules group, 240 genes were differentially expressed, including 206 up-regulated genes and 34 down-regulated genes. There were 221 overlapping genes in the two groups, and the functional enrichment mainly focused on cell cycle(CDT1, PLK1, BUB1B, TTK, KNL1, ESCO2, CDC6, NDC80, CDC25B, SGO1, CCNB2, ESPL1, CCNE1, MCM4, MCM5, FBXO5, BUB1, MCM2), apoptosis(Caspase-3,Bax,P53,Apaf1,Bak,Caspase-8), P53 signaling pathway(P53, CCNB2, APAF1, BAK, BAX, GTSE1, CASPASE-3, CCNE1), arachidonic acid metabolism(HPGDS, CYP2C54, CYP2B10, TBXAS1, CYP2C50), galactose metabolism(HK3, GLA, HK2, AKR1B7) and other signaling pathways. RNA-seq sequencing analysis showed that compound Danicao granules mainly regulated apoptosis signaling pathway, and quantitative PCR confirmed that compared with normal control group, mRNA expressions of Caspase-3,Bax,P53,Apaf1,Bak and Caspase-8 in liver tissue of model control group were increased (P < 0.01). Compared with model control group, mRNA expressions of Caspase-3,Bax,P53,Apaf1,Bak and Caspase-8 in liver tissue of compound Dancao granules group were decreased (P < 0.01). TUNEL staining showed that the number of cell nuclear shrinkage and apoptotic bodies decreased in the group of compound Dancao granule administration. Conclusion Compound Dancao Granule has a significant protective effect on non-alcoholic steatohepatitis induced by high fat feed combined with CCl4, and its mechanism might be connected to the control of genes linked to apoptosis.

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  • 收稿日期:2024-04-26
  • 最后修改日期:2024-07-25
  • 录用日期:2024-12-02
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