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乙酸诱导结肠炎模型(Wistar 大鼠,文献参考)

经导管向远端结肠注入 2 mL 3% 乙酸并倒置 30 秒的急性化学损伤模型(异氟烷 5% 麻醉下操作),随后剖检取结肠称重、铺平评估损伤范围与黏膜坏死/炎症。

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
colon

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
乙酸诱导结肠炎模型(Wistar 大鼠,文献参考)
Species
rat
Taxonomy ID
10116
Strain
Wistar

Biological characteristics

Research questions
乙酸急性黏膜损伤的范围、重量变化与炎症介质评价;抗结肠炎化合物(如 MON/PEI 类给药)的短期疗效模型。
Limitations
文献参考模型,不代表公司实际保有、供应或质检;乙酸损伤为急性化学烧伤样病理,无慢性免疫重塑过程,不等同 UC/CD 的自然病程。

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. Salehi Maryam, Yekdaneh Afsaneh, Derakhshan Maryam, Minaiyan Mohsen. Evaluation of the Protective Effect of the Secondary Root's Extract and Partitions of Devil's Claw ( Harpagophytum procombens ) on Ulcerative Colitis Caused by Acetic Acid in Rats.. International journal of preventive medicine. 2026; PMID: 42770125
  2. Shayesteh Fatemeh, Shahini Shams Abadi Milad, Rouhi Leila, Doosti Abbas, Bagheri Nader. Probiotic Intervention With Bacillus coagulans and Lactobacillus acidophilus in Small Animals Experimental Ulcerative Colitis: Insights From a Small Animal Model.. Veterinary medicine and science. 2026; PMID: 42806832
  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