重复给予克洛扎会导致大规模的变化对编码和非编码RNAs的表达,包括miR-124,在小鼠前额皮层
Rabha Mussa Younis1, Dalia Y Al Saeedy1, Mikhail G Dozmorov2
1Department of Pharmacotherapy and Outcomes Science, School of Pharmacy, Virginia Commonwealth University, Richmond, VA, USA.
Molecular neurobiology
|July 21, 2025
概括
克洛扎在小鼠大脑中显著改变基因表达和RNA剪接,影响微RNA-124和精神分裂症风险基因. 这些发现为克洛扎宾治疗反应提供了潜在的生物标志物.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 药理学 药理学 是一个学科.
背景情况:
- 克洛扎平是一种高度有效的精神分裂症抗精神病药物,但其确切的机制尚不清楚.
- 了解克洛扎的分子作用对于改善精神分裂症治疗至关重要.
研究的目的:
- 为了研究克洛扎宾对小鼠前皮层基因转录和RNA剪接的影响.
- 将这些发现与已知的精神分裂症风险基因相结合,以确定潜在的治疗点.
主要方法:
- 深度RNA测序被用来分析差异性mRNA和长非编码RNA (lncRNA) 表达和老鼠前皮层中的外因子使用.
- 小鼠接受了克洛扎宾治疗 (每天4毫克/千克/天21天),随后进行24小时的洗期.
- 使用定量PCR验证了特定微RNA (miRNA) 的变化.
主要成果:
- 克洛扎平显著改变了mRNA和lncRNA的表达,特别是那些参与RNA处理和拼接的mRNA和lncRNA.
- 微RNA-124宿主基因 (Mir124a-1hg) 显著上调,导致miR-124-3p.p.水平增加.
- 差异性外显子使用分析显示,克洛扎宾会影响50个精神分裂症风险基因的小鼠正义基因,这些基因富含神经元发育途径.
结论:
- 克洛沙平对皮质基因表达有深远的影响,影响编码和非编码RNA的丰度和拼接.
- 观察到对miR-124和精神分裂症风险基因的影响表明了克洛扎疗效的潜在机制.
- 这些发现可以作为预临床标记,用于预测精神分裂症患者对克洛扎的反应.
相关概念视频
01:22MicroRNAs
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 ends...
01:22MicroRNAs
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 ends...
02:39lncRNA - Long Non-coding RNAs
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA (lncRNA)...
01:22MicroRNAs
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...
02:39lncRNA - Long Non-coding RNAs
In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA (lncRNA)...
01:23Regulation of Expression at Multiple Steps
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...