乳头瘤病毒MnuPV1抵抗人类APOBEC3B的限制
Xingyu Liu1, Andrea Bilger2, Denis Lee2
1Department of Biochemistry and Structural Biology, University of Texas at San Antonio, San Antonio, Texas, USA.
Journal of virology
|February 11, 2026
概括
人类APOBEC3B (A3B) 是一种强大的抗病毒酶,但令人惊的是,它未能在小鼠中限制小鼠乳头瘤病毒 (MmuPV1) 复制. 这表明乳头瘤病毒可能具有一种保存的机制来逃避A3B限制.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
背景情况:
- APOBEC3B (A3B) 是一种针对灵长类动物的抗病毒酶,可以限制病毒复制.
- 人类乳头瘤病毒 (HPV) 导致全球癌症负担显著,需要了解先天性抗病毒机制.
- 宿主物种特定的反防御通常会中和像A3B.这样的抗病毒因素.
研究的目的:
- 为了研究人类A3B是否可以限制肌肉乳头瘤病毒1 (MmuPV1) 在物种无关的背景下复制.
- 在体外和体内评估A3B对MmuPV1的抗病毒活性.
- 为了确定MmuPV1是否具有规避A3B介导限制的机制.
主要方法:
- 产生表达人类A3B或催化突变 (A3B-E255A) 的FVB/N小鼠.
- 从转基因小鼠的初级角质细胞中量化MmuPV1基因表达和复制.
- 用MmuPV1感染A3B表达和非转基因小鼠以评估病理学.
主要成果:
- 酶活性的人类A3B并没有可测量的损害MmuPV1转录或DNA积累在小鼠角质细胞.
- 在表达A3B的小鼠中,mmuPV1感染导致的病理与非转基因对照中的病理相似.
- 人类A3B的存在或催化活性对MmuPV1的复制和致病性没有影响.
结论:
- 尽管MmuPV1缺乏对该酶的进化暴露,但MmuPV1的复制是抵抗人类A3B的限制的.
- 乳头瘤病毒可能具有一种保存的机制,可以逃避A3B和相关的DNA脱氨酶的限制.
- 了解这些逃避策略对于开发针对HPV相关疾病的新型抗病毒疗法至关重要.
相关概念视频
Restriction Enzymes
36.3K
Restriction enzymes are bacterial enzymes used to cut DNA in a sequence-specific manner. To cleave DNA, they bind to specific palindromic sequences called restriction sites. Such palindromic DNA sequences or inverted repeats are commonly found in regions of functional significance, such as the origin of replication, gene operator sites, and regions containing transcription termination signals.
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
The host bacteria protect their own genomic DNA from these enzymes by methylating these sites. Some...
36.3K
Resistivity
4.6K
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
4.6K
Resistance
6.1K
When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
6.1K
Cardiomyopathy IV: Restrictive Cardiomyopathy
587
Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
587
Equivalent Resistance
1000
In circuit analysis, situations often arise where resistors are neither in series nor parallel configurations. To tackle such scenarios, three-terminal equivalent networks like the wye (Y) (Figure 1 (a)) or tee (T) and delta (Δ) (Figure 1 (b)) or pi (π) networks come into play. These networks offer versatile solutions and are frequently encountered in various applications, including three-phase electrical systems, electrical filters, and matching networks.
1000
Resistance and Conductance
531
A conductor's DC resistance at a given temperature is influenced by its resistivity, length, and cross-sectional area. Resistivity is an inherent property of the conductor material, with annealed copper serving as the international standard for measurement. For instance, the resistivity of hard-drawn aluminum at 20 degrees Celsius is 61% of the standard conductivity of annealed copper.
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their...
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their...
531


