控制乙型肝炎病毒使用Imdusiran,一个小干扰RNA治疗药物
Emily P Thi1, Xin Ye1, Nicholas M Snead1
1Arbutus Biopharma Inc. 701 Veterans Circle, Warminster, Pennsylvania 18974, United States.
ACS infectious diseases
|September 22, 2024
概括
一种新的siRNA疗法Imdusiran,通过有效降低病毒载量,在慢性乙型肝炎患者中显示出功能治疗的希望. 这种研究药物在临床前模型中表现出强烈的泛基因型活性和持续抑制.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 病毒学 病毒学
- 在RNA治疗方面,RNA疗法.
背景情况:
- 慢性乙型肝炎 (CHB) 是一个重要的全球健康问题,治疗治疗方法有限.
- 目前的疗法提供较低的治愈率,需要新的方法来实现功能治愈.
- 小干扰RNAs (siRNAs) 是一个有前途的治疗策略,直接针对病毒RNA.
研究的目的:
- 描述imdusiran (AB-729) 的临床前表征,这是一种用于CHB的新型siRNA疗法.
- 在各种模型中评估imdusiran的疗效,安全性和作用机制.
- 评估imdusiran在实现CHB功能治愈方面的潜在作用.
主要方法:
- 使用基于HBV细胞的系统进行体外研究,以评估对抗性菌株的功效和活性.
- 在体内研究使用HBV腺相关病毒小鼠模型来评估HBsAg降低和效果持续时间.
- 使用人类全血分析评估imdusiran的免疫调节作用.
主要成果:
- 伊姆杜西兰证明了泛基因型纳米分子效能和抗HBV位多态的活性.
- 该siRNA疗法对抗抗核类同类和体组件调节器耐药的HBV分离物有效.
- 在小鼠模型中,单剂量imdusiran导致HBsAg持续降低10周.
- 伊姆杜西兰本质上没有刺激细胞因子的释放,支持其直接的抗病毒机制.
结论:
- 伊姆杜西兰在临床前评估中表现出强大的抗病毒活性和有利的安全性.
- 这些发现支持imdusiran作为CHB功能治愈组合疗法的关键组成部分的潜力.
- 伊姆杜西兰目前正在进行慢性乙型肝炎治疗的第二阶段临床研究.
相关概念视频
02:30siRNA - Small Interfering RNAs
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 ATP-dependent...
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 ATP-dependent...
02:15Experimental RNAi
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...
01:25Hepatitis
Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
01:30Inhibitors of Viral Protein Synthesis
Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
01:25Inhibitors Of Virion Release
Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
01:22Antiviral Nucleoside Inhibitors
Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...