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Cholesterol-fed New Zealand White rabbit

新西兰白兔对饲料胆固醇高度敏感,含 0.3%–2% 胆固醇的饲料可在数周内显著升高血浆胆固醇,12 周左右可经 Sudan IV 染色显示从主动脉弓向胸主动脉延伸的脂质病变;早期病变以单核细胞黏附和巨噬细胞来源泡沫细胞为主。

Outcome measures

获得可用于兔主动脉斑块组织学分级和组成的 HE 染色切片。

Experimental animals

动脉组织石蜡切片 H&E 染色
Age
not reported in the cited source
Tissue
aortic root; thoracic aorta

Experimental procedures

H&E staining **Dewaxing:** Paraffin sections are placed in xylene for 3 x 00:03:00 H&E staining **Rehydration: ** Paraffin sections are placed in - 100% EtOH for 3 x 00:03:00 - 95% EtOH for 1 x 00:03:00 - Rinse with water H&E staining **Hematoxylin staining: ** Paraffin sections are stained with hematoxylin for 00:00:20 and rinse under running water for 00:01:00 H&E staining **Differentiation and bluing:** Paraffin sections are placed into the bluing reagent for 00:01:00 and rinse under running water for 00:01:00 _This step results in a blue coloration of the nuclei._ H&E staining **Eosin staining:** Parrafin sections are counterstained with Eosin for 00:00:10 _This step results in a pink coloration of the cytoplasmic components and connective tissue fibers._ H&E staining **Dehydration and Clearing:** Paraffin sections are placed in - 95% EtOH for 00:02:00 - 100% EtOH for 2 x 00:02:00 - Xylene for 2 x 00:02:00 H&E staining **Mounting:** Parrafin sections are mounted with a glass coverslip using Permount.

Model identity

Model name
Cholesterol-fed New Zealand White rabbit
Species
rabbit
Strain
New Zealand White
Genetic background
New Zealand White

Biological characteristics

Phenotype stage
胆固醇饲料数周内出现高胆固醇血症,约 12 周可见明显主动脉脂质病变。
Research questions
饮食胆固醇对主动脉病变起始和分布的影响;脂蛋白残粒与泡沫细胞形成机制;降脂和抗炎干预。
Limitations
长期高胆固醇饲料可造成超过人类常见的极高胆固醇水平和多器官脂质沉积,病变以泡沫细胞为主,生理相关性受质疑;兔与人类在脂蛋白代谢上仍有差异。

Experimental methods

Experimental protocols

Reagents and materials

References

  1. Fan J, et al. Rabbit models for the study of human atherosclerosis: from pathophysiological mechanisms to translational medicine. Pharmacology & Therapeutics. 2015;146:104-119. DOI:10.1016/j.pharmthera.2014.09.009; PMID:25277507.
  2. Getz GS, Reardon CA. Animal models of atherosclerosis. Arteriosclerosis, Thrombosis, and Vascular Biology. 2012;32(5):1104-1115. DOI:10.1161/ATVBAHA.111.237693; PMID:22383700.
  3. protocols.io · vv1 · Nathalia L. Oliveira; samantha.gruenheid · This is an open access protocol distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
  4. ARRIVE 2.0 guidelines