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TNBS 诱导结肠炎模型(C57BL/6 小鼠,文献参考)

半氟化乳剂载体下的 TNBS 灌肠(文献记录 2.5% TNBS 于 50% 乙醇、65 μL 单次灌肠)诱导 C57BL/6 小鼠急性/慢性结肠炎,表现为透壁性炎症与 Th1/Th17 型细胞因子上调(IL-1、IL-17 等)。

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
TNBS 诱导结肠炎模型(C57BL/6 小鼠,文献参考)
Species
mouse
Taxonomy ID
10090
Strain
C57BL/6

Biological characteristics

Research questions
Th1/Th17 驱动透壁性结肠炎机制(Crohn 样);局部给药/纳米制剂干预疗效评价。
Limitations
文献参考模型,不代表公司实际保有、供应或质检;TNBS 为半抗原-载体化学损伤模型,与单纯上皮毒性模型不同;品系为 C57BL/6 小鼠,与大鼠 TNBS 记录(CMS 模型 38)不可互换。

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

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  11. Epredia Signature Series Hematoxylin (7221), 产品信息页, Fisher Scientific
  12. Epredia Signature Series Bluing Reagent (7301), 产品信息页, Fisher Scientific
  13. Epredia Signature Series Eosin Y (7111), 产品信息页, Fisher Scientific
  14. Xylene, Fisherbrand HistoPrep (HC7001GAL), 产品信息页, Fisher Scientific
  15. Fisher Chemical Permount Mounting Medium (SP15 产品族), 产品信息页, Fisher Scientific
  16. Ethanol (CID 702, CAS 64-17-5), PubChem 化合物标准记录
  17. ARRIVE 2.0 guidelines