一种对巨细胞起作用的非编码RNA药物TY1的口服生物可用性
Shukuro Yamaguchi1, Kazutaka Miyamoto1, Xaviar M Jones1
1Smidt Heart Institute Cedars-Sinai Medical Center Los Angeles California USA.
Journal of extracellular biology
|August 18, 2025
概括
这项研究引入了一种口服RNA治疗配方,使用素-花素小粒. 合成非编码RNA (ncRNA) 的口服输送在心脏病发作和肺损伤模型中显示出治疗效果.
科学领域:
- 生物技术是生物技术.
- 药理学 药理学是指药理学的学科.
- 在RNA治疗方面,RNA疗法.
背景情况:
- 经批准的RNA疗法需要亲肠道 (注射) 输送方法.
- 开发RNA药物的口服输送系统是一个重大挑战.
- 非编码RNA (ncRNA) 具有治疗潜力,但需要有效的输送.
研究的目的:
- 开发和评估合成非编码RNA (ncRNA) 的口服生物可用配方.
- 在临床前模型中评估口服ncRNA输送的安全性和有效性.
- 调查口服ncRNA吸收和分布的机制.
主要方法:
- 合成ncRNA (TY1) 在素 - 基托 (C2) 微粒中形成脂质纳米颗粒.
- 将TY1-C2口服给健康小鼠,以评估耐受性和毒性.
- 在老鼠心肌梗塞和小鼠急性肺损伤模型中对TY1-C2的评估.
- 涉及肠道巨细胞吸收和检测循环单细胞的机制研究.
主要成果:
- 口服TY1-C2在健康小鼠中耐受良好且无毒.
- 单次口服TY1-C2的剂量在心肌梗塞和急性肺损伤中减弱炎症时显示出心脏保护作用.
- TY1-C2被肠道巨细胞吸收,TY1在循环单细胞中被检测到长达72小时.
- 一种针对肝细胞的反感性寡核酸在C2口服时是无效的,这表明配方的特异性.
结论:
- 开发的C2小细胞配方使生物活性ncRNA可通过口服输送,向巨细胞.
- 口服TY1-C2对炎症状况和组织损伤具有治疗潜力.
- 这个平台为口服RNA疗法开辟了新的途径,特别是对于巨细胞介导疾病.
相关概念视频
Experimental RNAi
6.2K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
6.2K
Types of RNA
64.8K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
64.8K
MicroRNAs
3.1K
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...
3.1K
RNA Interference
26.4K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
26.4K
Bioavailability: Overview
3.1K
Bioavailability refers to the proportion of an unaltered drug that, after administration, enters the systemic circulation and can be distributed to the desired action site. Factors such as gastrointestinal (GI) absorption and liver biotransformation influence the bioavailability of a drug when it is administered orally. When a drug is administered intravenously, it enters the systemic circulation directly; by definition, its bioavailability is assumed to be 100%. The bioavailability of an...
3.1K
Leaky Scanning
5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.2K


