与细胞癌相关的DCLRE1B/Apollo生殖基因突变损害了端粒保护
Charlie Bories1, Thomas Lejour1, Florine Adolphe1
1EPHE, PSL Université, Paris, France; UMR 9019 CNRS, Gustave Roussy, Université Paris-Saclay, 114 rue Edouard Vaillant, Villejuif 94800, France.
概括
阿波罗基因的生殖系突变与遗传性细胞癌 (RCC) 有关. 功能丧失的阿波罗变种损害了DNA修复和端粒完整性,可能导致癌的发展.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 遗传性细胞癌 (RCC) 与已知的基因中的生殖基因突变有关,但许多家族病例缺乏已知的突变.
- DCLRE1B/Apollo基因在DNA损伤反应和修复 (DDRR) 和端粒维护中的作用至关重要.
研究的目的:
- 调查遗传性RCC的新型遗传原因.
- 描述DCLRE1B/Apollo变种在DNA修复和端粒完整性方面的功能.
主要方法:
- 整体外体测序 (WES) 用于识别生殖系变异.
- 在人类上皮细胞 (HKC8) 功能性表征与阿波罗淘汰和野生类型/突变阿波罗表达.
- 测试DNA链间交联 (ICL) 敏感性,DDRR和端粒损伤.
主要成果:
- 在有多例RCC病例的家庭中确定了两个生殖系错误变体 (ApolloN246I和ApolloY273H).
- 阿波罗缺陷使细胞对ICL损伤敏感,并导致缺陷的DDRR和端粒损伤积累.
- 突变的阿波罗形式与TRF2相互作用,但无法挽救端粒损伤,表明功能丧失.
结论:
- 阿波罗N246I和阿波罗Y273H变种可能是功能丧失突变.
- 由于阿波罗突变导致的端粒完整性损伤和基因组不稳定可能导致脏瘤发生.
- DCLRE1B/阿波罗突变代表了遗传性RCC的潜在新原因.
相关概念视频
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
Telomeres and Telomerase
23.3K
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...
23.3K
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
Non-LTR Retrotransposons
11.5K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.5K
Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
DNA Damage can Stall the Cell Cycle
9.2K
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
9.2K


