肝病動物模型(DDC造模飼料):DDC主要引起膽道損傷,也會導致門靜脈周圍肝細胞損傷,該模型被描述為PBC和 PSC 的小鼠模型。造模飼料參考:添加含0.1%DDC的模型飼料。
肝纖維化動物模型改良飼料法
通過飼喂改良后的飼料或添加劑,也可以誘導小鼠引起膽汁淤積肝臟損傷模型。5-二乙氧基羰基-1,4-二氫二氫吡啶 (DDC) 和 α-萘異硫氰酸鹽(ANIT)。每日給予小鼠含 0.1%DDC飼料,1 周后在膽管上皮細胞中可見血管細胞黏附的表達分子、骨橋蛋白和腫瘤壞死因子-α 上調。持續8 周導致膽卟啉增多,膽管周圍肌成纖維細胞活化,引起膽道纖維化與人類硬化性膽管炎相似。每日給予小鼠 0.025% ANIT,飼喂數天后,就可引起膽汁淤積性損傷,引起膽管上皮細胞損傷,膽管上皮擴張,輕度肝細胞損傷和門靜脈周圍炎癥導致肝纖維化。2 化學性損傷誘導致肝纖維化化學性肝纖維化是由能造成肝毒性的化學物質所引起的肝細胞損傷和修復交替出現導致肝內結締組織異常增生的直接結果。造模所使用的常用藥物試劑為四氯化碳(CCl4)、二甲基亞硝胺(DMN)等物質,這類物質具有強烈的肝損害性,能夠在不同程度破壞肝臟細胞導致肝內結締組織異常增生。
肝纖維化動物模型CCl4
四氯化碳(CCl4)是一種無色有機溶劑,對任何油脂具有很強的溶解性,尤其是動物油脂,因此,在人體表現為強肝毒性。CCl4法是用于復制肝臟損傷模型的常用方法。CCL4模型復制方法成熟,成功率高達 89.33%,簡單易行、經濟安quan。一般從第 2 周開始,就可出現不同程度肝纖維化程度,平均 4.9%,至第 8 周可達到平均 9.2% 的纖維化,能很好地模擬人類肝纖維化 S0~S4 期的病理特征,且與乙肝病毒感染所致肝纖維化的病理特征相似。該方法現已廣泛應用于研究鼠類肝纖維化發生機制、篩選血清標志物以及開發抗纖維化藥物等。但該方法由于 CCl4處理后的肝毒性劇烈,死亡率較高。總體來說,該方法在某種程度上基本可以滿足實驗需求,同時也需要改進來彌補缺點。
論文信息:
論文題目: HMGB1 links chronic liver injury to progenitor responses and hepatocarcinogenesis
期刊名稱:J Clin Invest.
時間期卷:2018;128(6):2436-2450.
在線時間:2018年3月20日
DOI:doi.org/10.1172/JCI91786.
產品信息:
貨號:CP-005-005
規格:5ml+5ml
品牌:Liposoma
產地:荷蘭
名稱:Clodronate Liposomes and Control Liposomes
辦事處:Target Technology(靶點科技)
Chronic liver injury models. Chronic liver injury was induced in 8- to 10-week-old male mice by feeding them a 0.1% DDC diet or an MCD diet supplemented with 0.15% ethionine for 3 weeks and 2 weeks, respectively. For selective deletion of HMGB1 in hepatocytes, Hmgb1fl/fl mice were injected i.v. with 1011 genome copies of AAV8-TBG-Cre or AAV8-TBG-LacZ on day 15 postpartum (for the Mdr2KO mice) or 6 weeks postpartum (for all other mice). For some experiments, mice fed a DDC diet were treated with ethyl pyruvate (40 mg/kg, i.p., given twice weekly throughout the entire time mice were fed DDC diet). For some experiments, mice fed a DDC diet were treated with liposomal clodronate or control liposomes (4 μl/g body weight, i.p., both from Liposoma), on days 4, 8, and 12 after starting the diet.
DDC模型氯膦酸鹽脂質體清除巨噬細胞解決方案
注射方式:腹腔注射(i.p.)
注射劑量:days 4, 8, and 12
注射方案:Clo:Clodronate Liposomes的縮寫
Liposoma氯膦酸鹽脂質體巨噬細胞清除劑Clodronate Liposomes清除效果檢測:
A. Macrophages were ablated in DDC diet treated mice by intraperitoneal injection of liposomal clodronate (n=7 mice) or control liposomes (n=11 mice) as depicted.
B. Macrophages were efficiently ablated by liposomal clodronate as demonstrated by F4/80 immunohistochemistry and qPCR for Emr1 mRNA (enconding F4/80).
C. Macrophage ablation by liposomal clodronate did not affect ductular reactions in DDC diet-treated mice as demonstrated by similar immunohistochemical staining for cytokeratin .