中国神经再生研究(英文版) ›› 2024, Vol. 19 ›› Issue (8): 1835-1841.doi: 10.4103/1673-5374.389301

• 原著:退行性病与再生 • 上一篇    下一篇

增强 V2 区神经元结构可塑性预防衰老和阿尔茨海默病啮齿动物模型的物体识别记忆缺陷

  

  • 出版日期:2024-08-15 发布日期:2024-01-03
  • 基金资助:
    该研究得到了西班牙经济和竞争部(Ministerio de Economía y Competitividad)(BFU2013-43458-R)和安达卢西亚省(P12-CTS-1694 和 Proyexcel-00422)的资助

Promotion of structural plasticity in area V2 of visual cortex prevents against object recognition memory deficits in aging and Alzheimer’s disease rodents

Irene Navarro-Lobato1, 2, #, †, Mariam Masmudi-Martín1, 2, #, ‡, Manuel F. López-Aranda1, 2, §, Juan F. López-Téllez1, 2, Gloria Delgado1, 2, Pablo Granados-Durán1, 2, Celia Gaona-Romero1, 2, Marta Carretero-Rey1, 2, Sinforiano Posadas1, 2, María E. Quiros-Ortega1, 2, Zafar U. Khan1, 2, 3, *#br#   

  1. 1Laboratory of Neurobiology, Centro de Investigaciones Médico Sanitarias (CIMES), University of Malaga, Malaga, Spain; 2Department of Medicine, Faculty of Medicine, University of Malaga, Malaga, Spain; 3Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Institute of Health Carlos III, Madrid, Spain
    †Currently at the Donders Institute for Brain Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands
    ‡Currently at the Brain Metastasis Group, National Cancer Research Centre (CNIO), Madrid, Spain
    §Currently at the Department of Neurobiology, University of California-Los Angeles, Los Angeles, CA, USA
  • Online:2024-08-15 Published:2024-01-03
  • Contact: Zafar U. Khan, PhD, zkhan@uma.es.
  • Supported by:
    This study was supported by grants from the Ministerio de Economía y Competitividad (BFU2013-43458-R) and Junta de Andalucía (P12-CTS-1694 and Proyexcel-00422) to ZUK.

摘要:

记忆力减退与衰老以及许多精神、神经和神经退行性疾病有关,而迄今为止研究的药物疗效都不理想。在视觉皮层 V2 区使用与 G 蛋白信号调节器 14 的 414 个氨基酸(RGS14414)蛋白相对应的基因进行治疗,能够诱导物体识别记忆增强。实验发现,在阿尔茨海默病等神经退行性疾病中相对不受影响的大脑区域 V2 区域使用 RGS14414 进行同样的治疗,可在幼年动物身上产生持久的物体识别记忆增强效果,并可防止衰老和阿尔茨海默病啮齿动物模型中的物体识别记忆缺陷。此外,记忆缺陷的预防是通过增加神经元树突分支和树突棘密度以及上调脑源性神经营养因子表达水平来实现的。在经RGS14414处理的衰老大鼠和阿尔茨海默病小鼠中敲除脑源性神经营养因子基因会导致神经元结构可塑性的上调和记忆障碍的预防完全丧失。这些结果表明,脑源性神经营养因子介导的 V2 区神经元结构可塑性对预防 RGS14414 处理的衰老和阿尔茨海默病啮齿动物模型的记忆缺陷至关重要。因此,关于 RGS14414 基因介导的 V2 区神经元回路激活的研究结果在治疗记忆缺陷方面具有重要意义。

https://orcid.org/0000-0003-0742-399X (Zafar U. Khan)

Abstract: Memory deficit, which is often associated with aging and many psychiatric, neurological, and neurodegenerative diseases, has been a challenging issue for treatment. Up till now, all potential drug candidates have failed to produce satisfactory effects. Therefore, in the search for a solution, we found that a treatment with the gene corresponding to the RGS14414 protein in visual area V2, a brain area connected with brain circuits of the ventral stream and the medial temporal lobe, which is crucial for object recognition memory (ORM), can induce enhancement of ORM. In this study, we demonstrated that the same treatment with RGS14414 in visual area V2, which is relatively unaffected in neurodegenerative diseases such as Alzheimer’s disease, produced long-lasting enhancement of ORM in young animals and prevent ORM deficits in rodent models of aging and Alzheimer’s disease. Furthermore, we found that the prevention of memory deficits was mediated through the upregulation of neuronal arborization and spine density, as well as an increase in brain-derived neurotrophic factor (BDNF). A knockdown of BDNF gene in RGS14414-treated aging rats and Alzheimer’s disease model mice caused complete loss in the upregulation of neuronal structural plasticity and in the prevention of ORM deficits. These findings suggest that BDNF-mediated neuronal structural plasticity in area V2 is crucial in the prevention of memory deficits in RGS14414-treated rodent models of aging and Alzheimer’s disease. Therefore, our findings of RGS14414 gene-mediated activation of neuronal circuits in visual area V2 have therapeutic relevance in the treatment of memory deficits.

Key words: behavioral performance, brain-derived neurotrophic factor, cognitive dysfunction, episodic memory, memory circuit activation, memory deficits, memory enhancement, object recognition memory, prevention of memory loss, regulator of G protein signaling