艾滋病毒感染的老年人表观遗传衰老的性别差异
Carrie D Johnston1, Alina P S Pang1, Eugenia L Siegler2
1Department of Medicine, Division of Infectious Diseases, Weill Cornell Medicine, New York City, New York, USA.
EBioMedicine
|February 9, 2025
概括
感染艾滋病毒的女性表现出比男性更慢的表观遗传衰老,与免疫功能和身体健康相关的差异. 了解这些特定于性别的表观遗传衰老模式对于艾滋病毒老年科学研究至关重要.
科学领域:
- 地质科学是地球科学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 艾滋病毒研究 艾滋病毒研究
背景情况:
- 艾滋病毒-1感染加速生物衰老,正如表观遗传钟所表明的那样.
- 在艾滋病毒表观遗传学研究中,女性的代表性不足,这限制了对性别差异的理解.
- 这项研究探讨了艾滋病毒感染的老年人间表观遗传衰老的性别差异.
研究的目的:
- 检查艾滋病毒感染者的表观遗传衰老中的性别差异.
- 研究表观遗传衰老加速,临床表型和蛋白质组学之间的关系.
- 以性别分层的方式分析基于表观遗传年龄加速的生存差异.
主要方法:
- 使用DNA甲基化数据计算了50岁以上的52名HIV感染女性和106名男性的表观遗传年龄.
- 利用奥林克的高通量蛋白质组学来分析血生物标记物.
- 在5年期间评估的生存率.
主要成果:
- 与男性相比,感染艾滋病毒的女性表现出明显较低的表观遗传加快年龄.
- 在与免疫细胞 (CD4+T细胞) 和身体健康 (步态,握力,VO2max) 相关的表观遗传生物标志物中观察到性别差异.
- 表观遗传年龄加速与炎症,衰老,免疫调节,功能和组织恒温标志物相关;较高的脆弱性得分与较低的CD4计数和CD4/CD8比率有关.
结论:
- 结果强调了性别分析在艾滋病毒病理学中的重要性.
- 表观遗传衰老生物标志物揭示了艾滋病毒感染者的显著性别差异.
- 对性别特异性表观遗传衰老的进一步研究对于了解与艾滋病毒相关的衰老至关重要.
相关概念视频
Epigenetic Regulation
3.0K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.0K
Epistasis
45.5K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
45.5K
Aging
35
Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
35
Inheritance of Chromatin Structures
6.2K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.2K
Replication in Eukaryotes
13.0K
In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...
13.0K


