Age matters.

Age matters.
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DOI:
10.1111/j.1460-9568.2009.06648.x
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发表时间:
2009-03
期刊:
The European journal of neuroscience
影响因子:
--
通讯作者:
Marinelli M
Marinelli M
中科院分区:
其他
文献类型:
--
作者:
McCutcheon JE;Marinelli M

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实验动物的年龄可能是一个关键变量,但在神经科学中,年龄问题往往被忽视。许多研究使用年幼的动物,而没有考虑未成熟和成熟受试者之间可能存在的差异。当试图对直到成年才出现的特征或疾病进行建模时,这尤其成问题。在这篇评论中,我们讨论了这种明显的偏见的原因,在实验动物的年龄,并说明了这个问题与发表的文章长时程增强的系统性审查。此外,我们还回顾了大鼠的发育阶段,并讨论了使用动物体重作为其年龄预测指标的困难。最后,我们提供了来自我们实验室的原始数据,并回顾了已发表的数据,以强调发育是一个持续的过程,不会随着青春期而结束。发育变化可以是数量性的,包括逐渐变化、快速转换或倒U形曲线。变化也可以是质的变化。因此,看似单一的现象可能在不同的年龄由不同的机制控制。我们的结论是,选择动物的年龄可能是至关重要的神经生物学研究的设计和解释。
The age of an experimental animal can be a critical variable, yet age matters are often overlooked within neuroscience. Many studies make use of young animals, without considering possible differences between immature and mature subjects. This is especially problematic when attempting to model traits or diseases that do not emerge until adulthood. In this commentary we discuss the reasons for this apparent bias in age of experimental animals, and illustrate the problem with a systematic review of published articles on long-term potentiation. Additionally, we review the developmental stages of a rat and discuss the difficulty in using the weight of an animal as a predictor of its age. Finally, we provide original data from our laboratory and review published data to emphasise that development is an ongoing process that does not end with puberty. Developmental changes can be quantitative in nature, involving gradual changes, rapid switches, or inverted U-shaped curves. Changes can also be qualitative. Thus, phenomena that appear to be unitary may be governed by different mechanisms at different ages. We conclude that selection of the age of the animals may be critically important in the design and interpretation of neurobiological studies.
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