在患有耐药叶的小鼠中,在microRNA-134抑制后减弱单个神经元和网络过激活性
Pablo Quintana-Sarti1,2, Jordan Higgins1,2, Cristina R Reschke2,3
1Department of Physiology & Medical Physics, RCSI University of Medicine & Health Sciences, Dublin, D02 YN77, Ireland.
概括
用反感性寡核酸抑制microRNA-134 (miR-134) 在模型中减少了自发性发作. 这种方法减少了单个神经元和网络的过激活性,为耐药性提供了潜在的治疗方法.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 获得性涉到复杂的病理生理学,这表明多重向的治疗策略.
- 微RNAs (miRNAs) 是基因表达的关键调节者,影响着许多蛋白质编码转录.
- 之前的研究表明,针对microRNA-134 (Ant-134) 的反感性寡核酸可以抑制状态后的发作.
研究的目的:
- 在已建立的模型中研究Ant-134在减少自发性发作的疗效.
- 阐明Ant-134抗发作作用的潜在电生理机制.
主要方法:
- 在雄性小鼠中进行Ant-134的脑内内微注射,这些小鼠患有因酸诱导的状态.
- 从海马切片 (CA1神经元) 的ex vivo电生理学记录注射后2-4天.
- 评估动作潜能爆发,刺激后突触电流频率,以及沙弗附带刺激反应.
主要成果:
- 在性小鼠中,Ant-134显著降低了自发发作的发生率.
- 电生理学分析显示单个神经元刺激性降低,包括减少CA1神经元中的动作潜能爆发和刺激后突触电流频率.
- 网络过度兴奋度减弱,这可以通过减少对Schaffer附带刺激的前刺激性反应来证明.
结论:
- 在模型中,抑制miR-134有效地降低了单个神经元和网络过敏性.
- 这些发现进一步支持将miR-134作为药物耐药性的治疗策略.
- 这项研究强调了基于miRNA的疗法在通过调节神经元刺激性来控制的潜力.
相关概念视频
01:22MicroRNAs
24.3K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
24.3K
01:22MicroRNAs
4.1K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
4.1K
02:42Transcription Attenuation in Prokaryotes
18.5K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
18.5K
02:26Protein Networks
4.6K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
4.6K
00:46Feedback Inhibition
57.3K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
57.3K
01:22Lobes of the Cerebrum
4.8K
The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
4.8K