AMLN 饮食相关 MASH 模型(文献参考)
AMLN(Amylin liver NASH)饮食为高脂(40 kcal% 脂肪)、高果糖(20 kcal%)并添加 2% 胆固醇的饮食,长期喂饲雄性小鼠可重现人 MASLD 的主要特征,谱系覆盖单纯脂肪变直至 MASH 与纤维化;肝线粒体超微结构随病程改变——脂肪变期线粒体形态基本正常,MASH 期明显肿胀,MASH-纤维化期出现嵴紊乱与基质丢失;呼吸链复合体活性、OXPHOS 蛋白水平与 ATP 生成随病程受抑,MASH-纤维化期线粒体自噬通路减少致损伤线粒体堆积;线粒体形态、线粒体自噬与 ATP 生成同时累及肝、脂肪、肌肉与心脏等多器官。
Outcome measures
获得可供光学显微镜观察的 H&E 染色组织切片:细胞核蓝紫色、细胞质与结缔组织纤维粉红色,用于观察组织中细胞的整体结构与形态细节。本方案本身不产出病理评分数值,也不提供特定分子标志物的定量结果。
Experimental animals
- Age
- AMLN饮食喂饲14、22、28周时点(自6周龄起喂饲)
- Sex
- Male
- Tissue
- liver(肝)
- Age
- AMLN饮食喂饲14、22、28周时点(自6周龄起喂饲)
- Sex
- Male
- Tissue
- liver(肝)
- Age
- AMLN饮食喂饲14、22、28周时点(自6周龄起喂饲)
- Sex
- Male
- Tissue
- liver(肝)
- Age
- 未记载周龄,终点取材组织切片 HE 判读(离体)
- Sex
- Male
- Tissue
- liver(肝)
Experimental procedures
脱蜡(Dewaxing) 石蜡切片置于二甲苯中脱蜡 3 次,每次 00:03:00。 复水(Rehydration) 石蜡切片依次置于 100% 乙醇中 3 次、每次 00:03:00,再置于 95% 乙醇中 1 次、00:03:00,随后用水漂洗。 苏木素核染色(Hematoxylin staining) 石蜡切片以苏木素染液染色 00:00:20,随后在流水下冲洗 00:01:00。 分化与返蓝(Differentiation and bluing) 石蜡切片置于返蓝液中 00:01:00,随后在流水下冲洗 00:01:00;此步使细胞核呈现蓝色。 伊红染色(Eosin staining) 石蜡切片以伊红复染 00:00:10;此步使细胞质成分与结缔组织纤维呈现粉红色。 脱水与透明(Dehydration and Clearing) 石蜡切片依次置于 95% 乙醇中 00:02:00、100% 乙醇中 2 次、每次 00:02:00,随后置于二甲苯中 2 次、每次 00:02:00。 封片(Mounting) 石蜡切片以 Permount 封片介质加盖玻片封固。
Model identity
- Model name
- AMLN 饮食相关 MASH 模型(文献参考)
- Species
- mouse
- Taxonomy ID
- 10090
- Strain
- C57BL/6N
- Genetic background
- C57BL/6N 近交系野生型宿主(实验使用雄性小鼠,购于 Taconic Biosciences);MASH 表型由 AMLN 饮食长期喂饲诱导,无基因改造背景。
Biological characteristics
- Phenotype stage
- 自 6 周龄起喂饲 AMLN 饮食 14、22、28 周,三个时间点分别对应脂肪变、MASH 与 MASH-纤维化分期(每组 10 只雄性)。
- Research questions
- MASLD/MASH 由脂肪变向纤维化进展的分期机制;多器官线粒体功能障碍与病程的对应关系。
- Limitations
- 文献参考饮食范式,不代表公司实际保有、供应或质检;饮食诱导模型无基因改造品系身份编号,背景品系标识不等于模型身份编号。观察基于雄性 C57BL/6N 的 14/22/28 周分期分组(每组 10 只),雌性与其他品系的外推未由该研究支持;该研究未进行口服葡萄糖耐量与胰岛素耐量试验,胰岛素抵抗程度不在其数据内。
Experimental methods
Experimental protocols
- Hematoxylin and Eosin (H&E) staining for histopathology
Hematoxylin and eosin (H&E) staining of fixed, paraffin-embedded tissue sections (4 μm). The workflow covers dewaxing, rehydration, hematoxylin nuclear staining, bluing, eosin counterstaining, dehydration and clearing, and coverslipping, yielding blue-purple nuclei and pink cytoplasm and connective tissue fibers for light-microscopic assessment of cellular and tissue morphology.
- Hematoxylin and Eosin (H&E) staining for histopathology
Hematoxylin and eosin (H&E) staining of fixed, paraffin-embedded tissue sections (4 μm). The workflow covers dewaxing, rehydration, hematoxylin nuclear staining, bluing, eosin counterstaining, dehydration and clearing, and coverslipping, yielding blue-purple nuclei and pink cytoplasm and connective tissue fibers for light-microscopic assessment of cellular and tissue morphology.
- Hematoxylin and Eosin (H&E) staining for histopathology
Hematoxylin and eosin (H&E) staining of fixed, paraffin-embedded tissue sections (4 μm). The workflow covers dewaxing, rehydration, hematoxylin nuclear staining, bluing, eosin counterstaining, dehydration and clearing, and coverslipping, yielding blue-purple nuclei and pink cytoplasm and connective tissue fibers for light-microscopic assessment of cellular and tissue morphology.
- Hematoxylin and Eosin (H&E) staining for histopathology
Hematoxylin and eosin (H&E) staining of fixed, paraffin-embedded tissue sections (4 μm). The workflow covers dewaxing, rehydration, hematoxylin nuclear staining, bluing, eosin counterstaining, dehydration and clearing, and coverslipping, yielding blue-purple nuclei and pink cytoplasm and connective tissue fibers for light-microscopic assessment of cellular and tissue morphology.
Reagents and materials
- 组织学二甲苯(混合异构体)
脱蜡剂
- Ethanol
复水梯度溶剂(去除二甲苯)
- 95% 乙醇溶液
复水梯度溶剂
- 自来水(组织学染色用)
复水后漂洗用水(后续各流水冲洗共用)
- Epredia Signature Series 苏木素染液(7221)
细胞核染色
- Epredia Signature Series 返蓝液(7301)
返蓝(使细胞核转蓝)
- Epredia Signature Series 伊红 Y 染液(7111)
细胞质与结缔组织纤维复染
- Permount 组织学封片剂(Fisher SP15)
封片介质
- Permount 组织学封片剂(Fisher SP15)
封片介质
- Epredia Signature Series 伊红 Y 染液(7111)
细胞质与结缔组织纤维复染
- Epredia Signature Series 返蓝液(7301)
返蓝(使细胞核转蓝)
- Epredia Signature Series 苏木素染液(7221)
细胞核染色
- 自来水(组织学染色用)
复水后漂洗用水(后续各流水冲洗共用)
- 95% 乙醇溶液
复水梯度溶剂
- Ethanol
复水梯度溶剂(去除二甲苯)
- 组织学二甲苯(混合异构体)
脱蜡剂
- 组织学二甲苯(混合异构体)
脱蜡剂
- Ethanol
复水梯度溶剂(去除二甲苯)
- 95% 乙醇溶液
复水梯度溶剂
- 自来水(组织学染色用)
复水后漂洗用水(后续各流水冲洗共用)
- Epredia Signature Series 苏木素染液(7221)
细胞核染色
- Epredia Signature Series 返蓝液(7301)
返蓝(使细胞核转蓝)
- Epredia Signature Series 伊红 Y 染液(7111)
细胞质与结缔组织纤维复染
- Permount 组织学封片剂(Fisher SP15)
封片介质
- 组织学二甲苯(混合异构体)
脱蜡剂
- Ethanol
复水梯度溶剂(去除二甲苯)
- 95% 乙醇溶液
复水梯度溶剂
- 自来水(组织学染色用)
复水后漂洗用水(后续各流水冲洗共用)
- Epredia Signature Series 苏木素染液(7221)
细胞核染色
- Epredia Signature Series 返蓝液(7301)
返蓝(使细胞核转蓝)
- Epredia Signature Series 伊红 Y 染液(7111)
细胞质与结缔组织纤维复染
- Permount 组织学封片剂(Fisher SP15)
封片介质
References
- Meroni M, et al. Exploring multiorgan mitochondrial dysfunction in the switch toward progressive MASLD in AMLN mice. iScience. 2025;28:113449. DOI:10.1016/j.isci.2025.113449; PMID:41050429; PMCID:PMC12495477(正文经全文XML核对). Animals and diet information 段逐字记载:'C57Bl/6 male mice (Taconic Biosciences, NY, USA)','C57BL/6N mice were fed an AMLN diet (40 kcal% fat, 20 kcal% fructose and 2% cholesterol) or standard diet (SD) for 14-22-28 weeks, starting from 6 weeks of age (n=10 mice/group)'——供应商为 Taconic,品系写作 C57BL/6N,未给出更细亚系后缀。结果段:喂饲 14/22/28 周对应 steatosis、MASH、MASH-fibrosis;线粒体由正常→肿胀→嵴紊乱与基质丢失;复合体活性/OXPHOS/ATP 随病程受抑、MASH-fibrosis 期 mitophagy 减少;肝、脂肪、肌肉、心脏多器官受累;未进行口服葡萄糖与胰岛素耐量试验。
- NCBI Taxonomy record 10090: Mus musculus (house mouse), rank species.
- Nathalia L. Oliveira; Samantha Gruenheid. Hematoxylin and Eosin (H&E) staining for histopathology. protocols.io, v1, 2026-07-31. DOI: 10.17504/protocols.io.kxygxr9jdg8j
- Epredia Signature Series Hematoxylin (7221), 产品信息页, Fisher Scientific
- Epredia Signature Series Bluing Reagent (7301), 产品信息页, Fisher Scientific
- Epredia Signature Series Eosin Y (7111), 产品信息页, Fisher Scientific
- Xylene, Fisherbrand HistoPrep (HC7001GAL), 产品信息页, Fisher Scientific
- Fisher Chemical Permount Mounting Medium (SP15 产品族), 产品信息页, Fisher Scientific
- Ethanol (CID 702, CAS 64-17-5), PubChem 化合物标准记录
- ARRIVE 2.0 guidelines