对C57BL/6J亚株的比较表型化揭示了心脏衰老的独特模式
Sophia Walter1,2,3, Patricia Baumgarten1,3, Niklas Hegemann3,4,5,6
1Molecular Toxicology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal, Germany.
GeroScience
|January 30, 2025
概括
不同的老鼠供应商影响了心脏衰老研究. C57BL/6J (B6J) 亚株表现出多种心脏衰老表型,其中一种表现出显著的功能障碍,而另一种表现出最小的变化.
科学领域:
- 老年学是指老年学的学科.
- 心血管研究研究心血管研究
- 动物模型 动物模型
背景情况:
- C57BL/6J (B6J) 小鼠是衰老研究的标准模型.
- 供应商依赖的亚菌株变异可能会影响实验结果.
- B6J亚菌株的表型差异对于老化研究至关重要.
研究的目的:
- 为了比较两个B6J小鼠亚株中的心脏衰老表型.
- 在B6JRj和B6JCrl小鼠中研究与年龄有关的心脏变化.
- 为了确定与心脏衰老相关的亚菌株特异性分子通路.
主要方法:
- 来自两个供应商的年轻 (5个月) 和老 (24个月) B6J小鼠的比较分析.
- 心脏组织分析,包括纤维化和缩的评估.
- 心脏组织的蛋白质组分析和基因组丰富分析 (GSEA).
- 孤立心肌细胞的功能评估.
主要成果:
- 心肌纤维化在两个亚株中随着年龄的增长而增加.
- 只有在老B6JRj小鼠中观察到心脏缩和弹射率下降.
- 在亚菌株之间,GSEA揭示了明显的与年龄相关的路径变化,特别是氧化酸化.
- 功能测试证实了老年B6JRj小鼠的心脏功能障碍,但B6JCrl小鼠没有.
结论:
- 在B6J亚株之间,心脏衰老的表现不同.
- 与B6JCrl小鼠不同的是,B6JRj小鼠随着年龄的增长表现出中度的缩功能障碍.
- 在小鼠的心脏衰老研究中,子菌株选择对于准确的心脏衰老研究至关重要.
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