实验动物科学 ›› 2024, Vol. 41 ›› Issue (6): 21-26.DOI: 10. 3969 / j. issn. 1006-6179. 2024. 06. 005

• 论著 • 上一篇    下一篇

长爪沙鼠血脂水平随年龄动态变化与分化趋势


  

  1. ( 1. 首都医科大学实验动物部,北京 100069)  ( 2. 首都医科大学基础医学院实验动物学学系,北京 100069)
    ( 3. 首都医科大学基础医学院神经再生修复研究北京市重点实验室,北京 100069)
  • 收稿日期:2024-02-01 出版日期:2024-12-28 发布日期:2025-01-15
  • 通讯作者: 卢 静( 1969—) ,女,教授,博士研究生导师,研究方向为人类疾病动物模型研究及实验动物管理,E-mail:lujing@ ccmu. edu. cn。 陈柏安( 1984—) ,男,教授,博 士 研 究 生 导 师,研 究 方 向 为 人 源 化 动 物 模 型 创 建 及 阿 尔 茨 海 默 病 防 治 的 基 础 研 究, E-mail:baianchen@ ccmu. edu. cn。
  • 作者简介:翟亚南( 1987—) ,女,主管技师,研究方向为实验动物管理及动物实验,E-mail:zhaiyanan@ ccmu. edu. cn。
  • 基金资助:
    国家重点研发计划( 2021YFF0702805)

Dynamic Changes and Differentiation Trends of Blood Lipid Levels with Age in Long Clawed Gerbils

  1. ( 1. Department of Experimental Animals,Capital Medical University, Beijing 100069,China)
    ( 2. Department of Experimental Zoology, School of Basic Medicine, Capital Medical University, Beijing 100069,China)
    (3. Beijing Key Laboratory of Nerve Regeneration and Repair, School of Basic Medicine, Capital Medical University, Beijing 100069,China)
  • Received:2024-02-01 Online:2024-12-28 Published:2025-01-15

摘要:

目的 探究不同月龄长爪沙鼠的血脂变化及分化趋势。 方法 选取普通鼠饲料饲喂至 2、4、6、8、10、12、14和 16 月龄的长爪沙鼠各 20 只,雌雄各半。 动物安乐死后获取血清,用于总胆固醇( TC) 、三酰甘油( TG) 、高密度脂蛋白( HDL-C)和低密度脂蛋白( LDL-C)4 项指标的检测,比较自然生长发育下不同阶段长爪沙鼠的血脂水平,自然分化为血脂正常组及血脂异常组;同时采集肝最大叶标本两份,一份作常规 HE 染色的组织形态学观察,一份作天狼星红染色的胶原纤维堆积观察。 结果 2 月龄和 4 月龄组血脂未发生异常,6 月龄沙鼠血清三酰甘油( TG) 和总胆固醇( TC)指标开始出 现 升 高,从 8 月 龄 开 始 血 脂 异 常 动 物 与 血 脂 正 常 动 物 相 比 血 清 TC、 TG 明 显 升 高 ( P <0. 01) ,8 月龄和 16 月龄血脂异常动物与未发生血脂异常动物相比血清 LDL-C 明显升高(P<0. 01) 。 血脂异常的动物中,8 月龄组占比仅 20%,10、12 及 14 月龄组占比均未超过 50%,16 月龄组动物占比已高达 70%,且雄性动物较多。 病理学检查,2 月龄组动物肝代谢旺盛,出现双核肝细胞分裂,无其他异常发现,8 月龄动物开始出现脂肪空泡,至 16 月龄组肝细胞大量死亡,肝索不清晰,肝血窦狭窄,甚至消失,肝细胞发生严重的脂肪变性,14 月龄胶原纤维轻度增多,16 月龄胶原纤维进一步明显堆积。 结论 使用普通鼠饲料饲喂至 16 月龄的雄性长爪沙鼠能够出现典型且稳定的血脂异常性状,为研究复制与人类相似病变的自发型高脂血症动物模型提供基础支持。

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Abstract:

Objective Exploring the changes and differentiation trends of blood lipids in long clawed gerbils of different ages. Method
Select 20 long clawed gerbils each aged 2, 4, 6, 8, 10, 12, 14, and 16 months and feed them with regular rat feed, with half male and half female. After euthanasia of animals, serum was obtained for the detection of four indicators: total cholesterol ( TC) , triglycerides ( TG) , high-density lipoprotein (HDL-C) , and low-density lipoprotein ( LDL-C) . The blood lipid levels of long clawed gerbils at different stages of natural growth and development were compared, and they naturally differentiated into normal blood lipid groups and abnormal blood lipid groups. At the same time, two samples of the largest lobe of the liver were collected, one for histological observation using routine HE staining, and the other for observation of collagen fiber accumulation using Sirius red staining.
Result There were no abnormalities in blood lipids in the 2-month-old and 4-month-old groups, while serum triglycerides ( TG) and total cholesterol ( TC) indicators began to increase in 6-month-old gerbils. From 8-month-old, serum TC levels in animals with dyslipidemia compared to those with normal blood lipids began to increase TG was significantly elevated ( P < 0. 01) , and serum LDL-C was significantly increased in 8-month-old and 16-month-old animals with dyslipidemia compared to animals without dyslipidemia (P<0. 01) . Among animals with abnormal blood lipids, the 8-month-old group accounts for only 20%, while the proportions of 10, 12, and 14-month-old do not exceed 50%. The proportion of animals in the 16-month-old group has reached 70%, and there are more male animals. Pathological examination showed that the liver metabolism of the 2-month-old group of animals was vigorous, with binuclear liver cell division and no other abnormalities found. Fat vacuoles began to appear in the 8- month-old animals, and a large number of liver cells died in the 16-month-old group. The liver cord was unclear, and the hepatic sinusoids were narrowed or even disappeared. Severe steatosis occurred in liver cells, with mild increase in collagen fibers at 14 months old and further significant accumulation of collagen fibers at 16 months old. Conclusion Feeding male long clawed gerbils with regular rat feed up to 16 months old can exhibit typical and stable lipid abnormalities, providing basic support for the study of replicating self occurring hyperlipidemia animal models with similar lesions to humans.

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