在小鼠中,神经元特异的人类血管活性肠受体2的过度表达会导致前额叶皮层的认知功能障碍和异常树突形态
Ami Ono1, Tatsunori Miyaoka2, Daichi Koan3
1Department of Orthodontics and Craniofacial Development Biology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Hiroshima, 734-8553, Japan; Department of Cellular and Molecular Pharmacology, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Hiroshima, 734-8553, Japan.
Journal of pharmacological sciences
|January 19, 2026
概括
VIPR2基因的微复制与精神分裂症有关. 过度表达神经元中的血管活性肠受体2 (VPAC2) 会损害认知能力并改变大脑结构,这表明它在神经发育障碍中起着有害作用.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- VIPR2基因的微复制与精神分裂症有关.
- 血管活性肠受体2 (VPAC2) 过度表达在神经元功能中的特定作用及其与精神分裂症的联系尚未完全理解.
研究的目的:
- 研究人类VPAC2在神经元中的过度表达对小鼠认知行为和前额叶皮层树突形态的影响.
- 阐明VPAC2相关的神经发育变化的基础分子机制.
主要方法:
- 使用Tau-Cre和四环素诱导系统生成了具有神经元特定VPAC2过度表达的转基因小鼠.
- 使用新型物体识别测试评估认知功能.
- 分析了前额叶皮层树突形态和基因表达,通过免疫组织化学,西部斑,RNA测序和定量PCR.
主要成果:
- 神经元中的VPAC2过度表达导致了新型物体识别测试中的性能受损.
- 观察到大脑重量和前额叶皮层金字塔神经元树突复杂性的显著减少.
- RNA测序表明VPAC2的过度表达影响了调节干细胞多能性,细胞周期和动因细胞骨架的途径,增加了树突形态发生基因X链接淋巴细胞调节3B的表达.
结论:
- 神经元VPAC2过度表达会对大脑发育产生不利影响,导致神经回路受损和认知缺陷.
- 这些发现强调了VPAC2在神经发育中的作用,并表明其失调有助于精神分裂症病理生理学.
相关概念视频
01:14Role of Cerebellum and Prefrontal Cortex in Memory
1.1K
The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
1.1K
01:14Piaget's Stage 2 of Cognitive Development
875
The preoperational stage, the second of Jean Piaget's four stages of cognitive development, spans approximately ages 2 to 7 and is characterized by the emergence of symbolic thinking. During this stage, children use language, images, and symbols to represent objects and concepts, enabling them to engage in imaginative and pretend play. This symbolic thinking supports children's ability to perform make-believe actions, such as imagining a broom as a horse or their hand as a phone, blending...
875
01:23Neurons: The Cell Body and the Dendrites
6.7K
A typical nerve cell comprises three main components: the cell body, dendrites, and the axon. The cell body, also known as the soma or perikaryon, serves as the central biosynthetic hub housing a nucleus surrounded by cytoplasm containing organelles commonly found in most cells. Notably, Nissl bodies, clusters of the rough endoplasmic reticulum and free ribosomes responsible for protein synthesis, are distinctive features of the neuronal cell body. As neurons age, aggregates of a brown pigment...
6.7K
02:23Abnormal Proliferation
5.1K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.1K
01:30Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
569
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
569
02:43Peptide Bonds
82.4K
A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
82.4K