由于有害的生殖系CHEK2变体,对造血性恶性瘤的倾向
Ryan J Stubbins1,2, Stephen Arnovitz3, Jennie Vagher4
1Leukemia/BMT Program of BC, BC Cancer, 2775 Laurel Street, V5Z 1M9, Vancouver, BC, Canada.
Leukemia
|May 7, 2025
概括
生殖系CHEK2变异,特别是p.I157T,与遗传性造血性恶性瘤 (HMs) 有关. 这些变异增加了患髓性和淋巴性白血病的风险,影响了患者的生存率.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 血液学 血液学 血液学
- 癌症研究 癌症研究
背景情况:
- 生殖线CHEK2变种在血液形成性恶性瘤 (HMs) 中的作用尚不清楚.
- CHEK2是一种瘤抑制基因,参与DNA损伤反应.
- 之前的研究主要集中在固体瘤中的CHEK2上.
研究的目的:
- 研究致病性/可能致病性 (P/LP) CHEK2变体与遗传性造血性恶性瘤 (HHM) 之间的关联.
- 确定与CHEK2变异相关的HM的频率和特定类型.
- 用小鼠模型评估CHEK2变异对生存的影响.
主要方法:
- 对HHM患者和固体瘤风险队列中的生殖系P/LP CHEK2变异的分析.
- 对急性髓性白血病 (AML) 和骨髓质瘤 (MDS) 中的CHEK2变异的公共数据集的检查.
- 利用一个敲入小鼠模型 (Chek2 p.I161T) 来评估CHEK2变体的体内影响.
主要成果:
- 在57名HHM试验者中发现了生殖系P/LP CHEK2变异,主要是p.I157T.
- CHEK2 p.I157T载体在HM患者中显示出显著的丰富性 (OR 6.44,P < 0.001),其中43%的患者发展为骨髓性恶性瘤.
- 在髓性白血病中,CHEK2功能丧失变异被丰富了 (P = 5.78e-7),小鼠模型显示生存率降低.
结论:
- 致病性/可能致病性CHEK2变体被确定为遗传性造血性恶性瘤的风险基因.
- 该p.I157T变体是发展髓状和淋巴状恶性瘤的重要危险因素.
- 这些发现凸显了在HM患者中检测CHEK2变异的基因查的重要性.
相关概念视频
Cancer-Critical Genes II: Tumor Suppressor Genes
7.2K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
7.2K
Mismatch Repair
4.6K
Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
The Mutator Protein Family Plays a Key Role in DNA Mismatch Repair
The human genome has more than 3 billion base pairs of DNA per cell. Prior to cell division, that vast amount of genetic...
4.6K
Abnormal Proliferation
4.3K
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...
4.3K
Pedigree Analysis
82.3K
Overview
82.3K
Cancers Originate from Somatic Mutations in a Single Cell
11.3K
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
11.3K
Lethal Alleles
13.3K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
13.3K


