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Left Ventricular Hypertrophy is Prevalent in Sprague-Dawley Rats

机译:Sprague-Dawley大鼠普遍存在左心室肥大

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Unrecognized cardiovascular abnormalities may confound the interpretation of research data collected using rats. However, although SPF rat colonies are screened for microbes and kept under standardized environmental conditions, their cardiovascular status is largely unknown. We recently performed surgery on anesthetized 80-d-old Sprague-Dawley rats and observed a high mortality that could not be attributed to the procedures or preceding treatments. Upon necropsy, cardiomyopathy was readily apparent in a substantial proportion of these rats. To further evaluate the nature of this condition, we evaluated the histology and morphology of hearts from both Sprague-Dawley and Lewis rats. Compared with Lewis rats, Sprague-Dawley rats had greater left ventricular wall thickness and larger cardiomyocyte cell size. Severe left ventricle hypertrophy was present in 38% of young adult Sprague-Dawley rats. These findings may have implications for research models that use Sprague-Dawley rats.
机译:无法识别的心血管异常可能会混淆使用大鼠收集的研究数据的解释。但是,尽管对SPF大鼠的菌落进行了微生物筛选,并保持在标准的环境条件下,但它们的心血管状态仍然未知。我们最近对麻醉过的80 d大的Sprague-Dawley大鼠进行了手术,观察到较高的死亡率,这不能归因于手术或先前的治疗。尸检时,在这些大鼠的相当大一部分中容易出现心肌病。为了进一步评估这种疾病的性质,我们评估了Sprague-Dawley和Lewis大鼠的心脏的组织学和形态。与Lewis大鼠相比,Sprague-Dawley大鼠的左心室壁厚更大,心肌细胞尺寸更大。 38%的成年Sprague-Dawley成年大鼠中存在严重的左心室肥大。这些发现可能对使用Sprague-Dawley大鼠的研究模型有影响。

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