赋予抗真菌药物耐药性的RNAi表是可以遗传的
Carlos Pérez-Arques1, María Isabel Navarro-Mendoza2,3,4, Ziyan Xu5
1Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA. carlos.parq@duke.edu.
Nature communications
|August 7, 2025
概括
在真菌中赋予抗真菌药物耐药性的表皮突变可以通过小RNAs (sRNAs) 通过几代人传承下来. 这种RNA介导的遗传独立于DNA序列和孟德尔遗传学.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 菌类学 菌类学是指菌类学.
背景情况:
- 表皮突变改变基因表达而不改变DNA序列,影响诸如耐药性等特征.
- RNA干扰 (RNAi) 和染色质修饰是已知的真菌表皮转移的机制.
- 对表观遗传修饰的跨代遗传,特别是在性繁殖后,在很大程度上仍然没有特征.
研究的目的:
- 为了研究RNAi介导的表皮突变的跨代遗传,赋予抗真菌药物耐药性.
- 确定Mucor circinelloides这种表观遗传特征的遗传模式和分子基础.
- 探索小RNAs (sRNAs) 在跨代传递表观遗传信息中的作用.
主要方法:
- 利用Mucor circinelloides作为研究真菌表观遗传学的模型生物.
- 应用遗传和分子技术来追踪抗真菌药物耐药性遗传.
- 分析了小RNA配置文件,以确定与遗传相关的特定sRNA签名.
主要成果:
- 证明RNAi介导的抗真菌药物耐药性在Mucor circinelloides中是跨代遗传的.
- 为这种特征建立了一个DNA序列独立的非孟德尔遗传模式.
- 确定了小RNAs (sRNAs) 作为传递药物耐药性的唯一决定因素.
结论:
- 小RNA可以充当表观遗传信息的载体,使得药物耐药性等获得性特征的跨代遗传成为可能.
- 这种基于RNA的遗传机制为真核病原体的表型适应性和进化提供了新的视角.
- 这些发现对理解和打击真菌病原体抗菌药物耐药性的研究有重要意义.
更多相关视频
09:58Using RNA-sequencing to Detect Novel Splice Variants Related to Drug Resistance in In Vitro Cancer Models
Published on: December 9, 2016
13.9K
08:46Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
Published on: December 9, 2015
10.7K
相关概念视频
Experimental RNAi
6.3K
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...
6.3K
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
siRNA - Small Interfering RNAs
17.0K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
17.0K
piRNA - Piwi-interacting RNAs
7.0K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
7.0K
RNA Editing
9.2K
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
9.2K
Viral Mutations
32.9K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
32.9K
