相关实验视频
Updated: Aug 11, 2026

10:55
Rescue of Recombinant Newcastle Disease Virus from cDNA
Published on: October 12, 2013
概括
瘤坏死因子-α (TNF-α) 和TNF-β具有抗病毒性质,与干扰素 (IFN) 合作,保护细胞免受病毒感染. 这些瘤亡因子选择性地杀死病毒感染的细胞,独立于IFN诱导.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 瘤亡因子 (TNF) 和淋巴毒素是结构相关的蛋白质,具有相似的生物活性.
- 最初是因为它们的瘤杀伤作用而被发现,后来人们认识到它们在免疫反应中的更广泛的作用.
研究的目的:
- 研究TNF-α和TNF-β的抗病毒活性.
- 确定TNF-α和TNF-β是否与抗病毒防御中的干扰素 (IFN) 协同作用.
- 探索TNF介导抗病毒作用的机制.
主要方法:
- 用TNF-α和TNF-β治疗各种细胞类型.
- 与干扰素 (IFN) 的同时治疗.
- 对RNA和DNA病毒感染的耐药性的评估.
- 在对病毒感染的反应中评估TNF产生.
主要成果:
- 无论是TNF-alpha还是TNF-beta都显示出针对RNA和DNA病毒的显著抗病毒活性.
- 与IFN协同作用的TNF-alpha和TNF-beta增强了各种细胞类型中的病毒抗性.
- TNFs的抗病毒作用独立于诱导的IFN合成.
- 病毒感染的细胞被TNFs选择性地杀死,这种效应被IFN-gamma加速.
- 发现病毒感染诱导TNFs的产生.
结论:
- TNF-α和TNF-β具有强大的抗病毒活性.
- 在对病毒感染的天生的免疫反应中,TNFs起着至关重要的作用.
- TNFs和IFNs之间的协同相互作用增强了细胞对病毒的防御能力.
相关概念视频
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...
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...
Tumor Immunotherapy
Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
Inhibitors 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...
Inhibitors 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...
Antiviral 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),...
Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...

