ApcMin/+ mouse model of intestinal polyposis
ApcMin/+ 为ENU诱变产生的常染色体显性突变模型,模拟人类家族性腺瘤性息肉病(FAP)。C57BL/6J遗传背景下的ApcMin/+ 小鼠在90日龄前小肠内多发病灶数超过50枚,肿瘤极少发生侵袭,但较大息肉出血引起的肠梗阻与贫血常导致小鼠于约150日龄死亡。该模型被公认为结直肠癌研究的先导模型,腺瘤主要分布于小肠,结肠病变较少。
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
- 8 周龄(PMID:27246043)
- Tissue
- intestine (small intestine predominant)
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
- ApcMin/+ mouse model of intestinal polyposis
- Species
- mouse
- Taxonomy ID
- 10090
- Strain
- C57BL/6 background (C57BL/6J and background-as-stated studies merged at family level; substrain differences per cited study)
- Genetic background
- C57BL/6 family
- Genotype / zygosity
- ApcMin/+
- Allele
- ApcMin
Biological characteristics
- Phenotype stage
- 90日龄前小肠多发腺瘤形成,约150日龄因肠梗阻与贫血死亡。
- Research questions
- 评估膳食组分对肠道肿瘤发生的影响;研究人类肠道肿瘤发生的遗传、环境与治疗学层面;评估R. intestinalis对ApcMin/+小鼠自发性肠道肿瘤形成的抑制作用及其与anti-PD-1疗效的协同;通过Bifidobacterium breve CCFM683、CLA及PPARγ轴解析CRC化学预防机制;评估Agathobacter rectalis及其代谢物EGC经表没食子儿茶素-SREBF2轴抑制结肠肿瘤发生的作用;研究胆囊切除相关菌群失调对结直肠肿瘤发生的促进效应;检测ApcMin/+小鼠肠黏膜与肿瘤中HMGA1 mRNA及蛋白的表达上调;分析GNAS R201C活化突变与Apc缺失在小肠道腺瘤形成中的协同效应;考察DSS诱导性结肠炎背景下IQ对扁平型与息肉型炎症相关肿瘤的差异性作用;评价妥芬那酸对肠道息肉形成的化学预防效应。
- Limitations
- 文献参考模型,不代表公司实际保有、供应或质检。本包内多项原研(R. intestinalis干预、Bifidobacterium breve CCFM683/CLA-PPARγ轴、Agathobacter rectalis/EGC轴、胆囊切除后菌群失调、HMGA1表达分析、GNAS-Apc协同、IQ/DSS炎症相关肿瘤及妥芬那酸干预等)实际采用该模型开展结直肠癌研究。模型局限:腺瘤主要发生于小肠,结肠病变较少,与人类以结肠为主的结直肠癌存在解剖部位差异;肿瘤极少发生侵袭;无菌与常规ApcMin/+小鼠在腺瘤发育上无显著差异,提示该模型的肿瘤发生具有微生物非依赖性。
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
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- 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