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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

Hematoxylin and Eosin (H&E) staining for histopathology
Age
AMLN饮食喂饲14、22、28周时点(自6周龄起喂饲)
Sex
Male
Tissue
liver(肝)
Hematoxylin and Eosin (H&E) staining for histopathology
Age
AMLN饮食喂饲14、22、28周时点(自6周龄起喂饲)
Sex
Male
Tissue
liver(肝)
Hematoxylin and Eosin (H&E) staining for histopathology
Age
AMLN饮食喂饲14、22、28周时点(自6周龄起喂饲)
Sex
Male
Tissue
liver(肝)
Hematoxylin and Eosin (H&E) staining for histopathology
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

References

  1. 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。
  2. NCBI Taxonomy record 10090: Mus musculus (house mouse), rank species.
  3. 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
  4. Epredia Signature Series Hematoxylin (7221), 产品信息页, Fisher Scientific
  5. Epredia Signature Series Bluing Reagent (7301), 产品信息页, Fisher Scientific
  6. Epredia Signature Series Eosin Y (7111), 产品信息页, Fisher Scientific
  7. Xylene, Fisherbrand HistoPrep (HC7001GAL), 产品信息页, Fisher Scientific
  8. Fisher Chemical Permount Mounting Medium (SP15 产品族), 产品信息页, Fisher Scientific
  9. Ethanol (CID 702, CAS 64-17-5), PubChem 化合物标准记录
  10. ARRIVE 2.0 guidelines