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
- 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
- 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
- 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
- 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
- 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