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Mc4r-deficient mouse on a high-fat diet

Mc4r 缺失小鼠在高脂饮食条件下出现脂肪性肝炎及肝纤维化,长期观察可涉及肝细胞癌终点。

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
未记载周龄,终点取材组织切片 HE 判读(离体)
Tissue
liver

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
Mc4r-deficient mouse on a high-fat diet
Species
mouse
Taxonomy ID
10090
Genotype / zygosity
Mc4r deficient (knockout)

Biological characteristics

Phenotype stage
脂肪性肝炎、纤维化及后续肝细胞癌。
Research questions
研究 Mc4r 缺失与高脂饮食共同作用下的脂肪性肝炎、肝纤维化和肿瘤进展。
Limitations
Mc4r 缺失与膳食处理共同决定病理表型,不能将其视为普通野生型高脂饮食模型。

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.

Reagents and materials

References

  1. Mouse models for investigating the underlying mechanisms of nonalcoholic steatohepatitis-derived hepatocellular carcinoma. Takakura Kazuki; Oikawa Tsunekazu; Tomita Yoichi; et al.. World journal of gastroenterology 2018.
  2. Antifibrotic effect of pirfenidone in a mouse model of human nonalcoholic steatohepatitis. Komiya Chikara; Tanaka Miyako; Tsuchiya Kyoichiro; et al.. Scientific reports 2017.
  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