相关实验视频

Updated: Jan 16, 2026

A High-throughput Cre-Lox Activated Viral Membrane Fusion Assay to Identify Inhibitors of HIV-1 Viral Membrane Fusion

A High-throughput Cre-Lox Activated Viral Membrane Fusion Assay to Identify Inhibitors of HIV-1 Viral Membrane Fusion

Published on: August 14, 2018

干扰素和IFITM3对HIV-1感染性的限制被Nef抵消

Mahesh Agarwal¹, Kin Kui Lai¹, Isaiah Wilt¹

¹Center for Cancer Research, National Cancer Institute, Frederick, MD, USA.

Science advances

|October 1, 2025

概括

艾滋病毒-1 Nef 蛋白质可以抵消干扰素的作用.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
分子生物学分子生物学

背景情况:

人类免疫缺陷病毒1型 (HIV-1) 辅助蛋白Nef对于病毒病原性至关重要.
尼夫调节细胞表面蛋白 (CD4,MHC-I) 并通过抵消SERINC3/5.5来增强病毒感染力.
干扰素诱导的跨膜蛋白3 (IFITM3) 是一种限制病毒进入的抗病毒蛋白.

研究的目的:

调查HIV-1 Nef在克服干扰素诱导的抗病毒状态中的作用.
为了确定Nef是否可以独立于SERINC3/5.5而对IFITM3产生抗性.
阐明Nef与IFITM3限制相互作用并克服的机制.

主要方法:

从初级HIV-1分离物中分析NEF蛋白质.
在体外测试以评估干扰素治疗细胞中的病毒感染性.
使用Nef和IFITM3.3进行的共免疫沉和膜相互作用研究.
评估IFITM3被纳入病毒和病毒融合动力学的评估.

主要成果:

来自各种HIV-1分离物的NEF蛋白在干扰素治疗的细胞中恢复了病毒感染力.
尼夫以SERINC3/5独立的方式赋予IFITM3的耐药性.
艾滋病毒-1类C Nef与IFITM3直接相互作用,减少了它被纳入病毒体,并恢复了病毒融合.

结论:

艾滋病毒-1 Nef通过抵消IFITM3.3的抗病毒作用,具有新的免疫调节功能.
尼夫与IFITM3的相互作用有助于病毒从干扰素诱导的抗病毒状态中逃脱.
这些发现揭示了HIV-1病原和免疫逃避的新机制.

更多相关视频

Peptide-based Identification of Functional Motifs and their Binding Partners

Peptide-based Identification of Functional Motifs and their Binding Partners

Published on: June 30, 2013

Assembly and Purification of Prototype Foamy Virus Intasomes

Assembly and Purification of Prototype Foamy Virus Intasomes

Published on: March 19, 2018

相关概念视频

Immune Response Against Viral Pathogens

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...

Retrovirus Life Cycles

Retrovirus Life Cycles

Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...