针对NS5的核酸类类似物抑制登革热病毒和其他病毒
Priyanka Bhakt1, Swechha M Pokharel1, Yue Li1
1Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America.
PLoS pathogens
|February 17, 2026
概括
研究人员确定了两种强大的核酸相似物,UPGNUC255和UPGNUC558,对所有登革热病毒 (DENV) 血清型和其他病毒有效. 这些化合物向病毒RNA复制,提供了一个有前途的广谱抗病毒策略.
科学领域:
- 病毒学 病毒学
- 药物发现 药物发现 药物发现
- 分子生物学分子生物学
背景情况:
- 登革热病毒 (DENV) 是全球公共卫生威胁,四种血清型每年导致数百万例症状感染.
- 现有的治疗方法缺乏针对所有DENV血清型和相关的黄状病毒的广泛疗效.
- 核糖类类似物在抑制病毒RNA复制和开发广谱抗病毒药物方面表现有前途.
研究的目的:
- 识别具有广泛抗病毒活性的核类同类物对所有四种DENV血清型.
- 评估已识别的化合物对其他黄病毒 (如西尼罗病毒和寨卡病毒) 的疗效.
- 阐明有前途的抗病毒候选者的作用机制和耐药性途径.
主要方法:
- 在人类细胞模型中,对1,101种核类相对应物进行DENV血清型2 (DENV2) 的高通量选.
- 活性化合物的二次查针对所有四种DENV血清型和其他黄病毒 (西尼罗病毒,寨卡病毒).
- 涉及抗性突变分析和标识的机制研究 (病毒RNA依赖RNA聚合酶 - RdRp).
主要成果:
- 确定了23种具有广泛抗病毒活性的核类型对DENV.
- 两个纯氨酸类型,UPGNUC255和UPGNUC558,表现出强大的泛病毒活性,减少病毒载量超过10倍.
- 与S604T突变相关的UPGNUC558耐药性;与RdRp域中的新型R355Q突变相关的UPGNUC255耐药性.
结论:
- UPGNUC255和UPGNUC558是有希望的化合物,用于开发针对病毒的广泛抗病毒疗法.
- 鉴定到的突变为这些核糖类相似物的作用机制和潜在耐药性概况提供了洞察力.
- 针对NS5的病毒RdRp域是一个可行的策略,用于flavivirus药物开发.
相关概念视频
01:29Viruses with RNA Genomes
1.0K
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
1.0K
02:30siRNA - Small Interfering RNAs
18.8K
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...
18.8K
01:29Subviral Agents
623
Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
623