白细胞端粒长度与老年人的功能表现之间的关联:观察性研究
Fabiana Souza Máximo Pereira1,2, Ronaldo Luis Thomasini1,2,3,4, Daniele Sirineu Pereira5
1Faculty of Medicine of Diamantina, Federal University of Jequitinhonha and Mucuri Valleys, Diamantina, Brazil.
Rejuvenation research
|January 27, 2024
概括
在单核细胞 (而不是粒细胞) 中,较短的相对端粒长度 (RTL) 与老年人更好的身体功能有关. 这一发现挑战了关于端粒长度和衰老的假设,表明复杂的细胞动态影响健康.
科学领域:
- 老年学是一门学科.
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 现有的研究将缩短的端粒与衰老和疾病联系在一起.
- 端粒长度在不同类型血细胞中的特定作用及其与老年人身体表现的关联需要进一步研究.
研究的目的:
- 探索白细胞亚型 (单核细胞和粒细胞) 的相对端粒长度 (RTL) 与老年人身体表现之间的关联.
- 研究单核细胞和粒细胞之间与功能能力相关的RTL动态的潜在差异.
主要方法:
- 在95名60岁以上的参与者中进行了横截面的观察性研究.
- 在外周血液单核细胞和粒细胞中测量相对端粒长度 (RTL).
- 使用短物理性能电池 (SPPB) 评估身体性能.
主要成果:
- 单核细胞的RTL明显低于粒细胞的RTL (p < 0.0001).
- 具有良好的SPPB表现的个体与中等或差表现的个体相比,单核细胞RTL较低.
- 在全球SPPB得分和单核细胞RTL之间,以及与SPPB坐立域之间,发现了显著的逆相关性.
结论:
- 与预期相反,较短的单核细胞RTL可能与老年人有利的身体功能有关.
- 单核细胞和粒细胞中明显的RTL模式表明不同的生物作用,循环率,以及对免疫史和端粒酶活性等因素的反应.
- 这些发现凸显了老年人细胞衰老,免疫功能和身体能力之间的复杂关系.
相关概念视频
Telomeres and Telomerase
5.2K
5.2K
Replicative Cell Senescence
3.6K
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds...
3.6K
Aging
51
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...
51


