DNA recombination as a possible mechanism in declarative memory: A hypothesis

DNA recombination as a possible mechanism in declarative memory: A hypothesis
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DNA重组作为陈述性记忆的一种可能机制:一个假设

DOI:
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发表时间:
2001
影响因子:
4.2
通讯作者:
Y. Arshavsky
Y. Arshavsky
中科院分区:
医学3区
文献类型:
--
作者:
S. Peña de Ortiz;Y. Arshavsky

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陈述性记忆的持久性表明它具有化学或结构基础。当前的长期记忆模型基于这样的一般假设:记忆痕迹是通过突触连接的结构修改来存储的,从而导致神经活动模式的改变。在转录和翻译水平上调节的基因表达的变化被认为对于结构突触修饰至关重要。在这里,我们提出了另一种假设,指出永久记忆具有化学基础而不是结构基础。我们认为大脑中记忆编码的机制与免疫系统中的相似,因此神经系统中记忆的持久性是通过体细胞重组机制在基因组水平上得到保证的。因此,我们假设永久陈述性记忆的痕迹可能以由修饰基因编码的新蛋白质的形式存在于大脑神经元中。本次讨论旨在提供支持大脑记忆存储 DNA 重组机制的证据,并促进进一步研究以评估这一假设。 J.神经科学。资源。 63:72–81, 2001。© 2001 Wiley-Liss, Inc.
The durability of declarative memory suggests that it has either a chemical or a structural basis. Current models of long‐term memory are based on the general assumption that traces of memory are stored by structural modifications of synaptic connections, resulting in alterations in the patterns of neural activity. Changes in gene expression, regulated at both the transcriptional and the translational levels, are considered essential for structural synaptic modifications. Here we present an alternative hypothesis stating that permanent memory has a chemical rather than a structural basis. We suggest that the mechanism of memory coding in the brain is similar to that in the immune system so that the permanence of memories in the nervous system is ensured at the genomic level by a somatic recombination mechanism. Thus, we hypothesize that traces of permanent declarative memory might present within cerebral neurons in the form of novel proteins coded by the modified genes. This discussion is intended to provide evidence in support of a DNA recombination mechanism for memory storage in the brain and to stimulate further research working toward the evaluation of this hypothesis. J. Neurosci. Res. 63:72–81, 2001. © 2001 Wiley‐Liss, Inc.
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