BubR1和SIRT2:对体积,衰老和癌症的洞察力
Renju Pun1, Niti Kumari1, Rodaina Hazem Monieb1
1Biomedical Sciences Department, Creighton University School of Medicine, Omaha, NE, USA.
Seminars in cancer biology
|November 3, 2024
概括
衰老导致BubR1蛋白减少,增加癌症风险. 酶SIRT2和NAD+可能会恢复BubR1水平,为与年龄相关的疾病和癌症提供新的治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
- 在瘤学瘤学.
背景情况:
- 衰老是癌症的主要风险因素,与基因组不稳定性增加有关.
- 线粒细胞监测蛋白BubR1对染色体稳定至关重要,并且随着年龄的增长而下降.
- 减少BubR1与与年龄相关的疾病和癌症有关.
研究的目的:
- 审查BubR1在衰老和基因组稳定中的作用.
- 探索涉及SIRT2和NAD+调节BubR1.1的调节途径.
- 突出针对BubR1的治疗潜力,针对与年龄相关的疾病,特别是癌症.
主要方法:
- 文献综述,重点关注BubR1,SIRT2,NAD+和衰老.
- 对将BubR1与基因组不稳定性和衰老联系起来的机制的分析.
- 检查SIRT2作为BubR1.1上游调节者的作用.
主要成果:
- 随着年龄的增长,BubR1水平自然会下降,导致基因组不稳定.
- 一种依赖NAD+的脱酶SIRT2调节了BubR1的表达和功能.
- 该NAD+-SIRT2-BubR1通路对于细胞平衡至关重要,并且可以预防无倍积分.
结论:
- BubR1 是衰老表型和基因组稳定性的关键调节者.
- 通过SIRT2介导的BubR1调节是一个潜在的治疗策略.
- 针对NAD+-SIRT2-BubR1轴可能为与年龄相关的癌症提供新的治疗方法.
相关概念视频
Nondisjunction
3.8K
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
3.8K
Mitochondria
11.2K
Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...
11.2K
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
The Nucleolus
8.7K
The nucleolus is the most prominent substructure of the nucleus. When it was first discovered, it was considered to be an isolated organelle that forms fibrils and granules. In 1931, the relationship between the nucleolus and chromosomes was first described by Heitz. He observed that the appearance and size of nucleolus varies depending on the stage of the cell cycle. He also noticed constricted regions on different chromosomes clustered together at definite cell cycle stages. These regions,...
8.7K
PI3K/mTOR/AKT Signaling Pathway
3.4K
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a...
3.4K
The Retinoblastoma Gene
4.1K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.1K


