该ATM Ser49Cys变体影响ATM功能,作为瘤基因诱导衰老的调节剂
Caroline Atkinson1, Aideen M McInerney-Leo2, Martina Proctor1
1Mater Research Institute, The University of Queensland, Brisbane, QLD 4102, Australia.
International journal of molecular sciences
|February 10, 2024
概括
突变的阿塔克西亚-泰朗吉克塔西亚 (ATM) Ser49Cys变体显示正常的急性DNA损伤反应,但在慢性瘤基因压力下功能减弱,可能会改变其他遗传风险.
科学领域:
- 细胞生物学 细胞生物学
- 癌症遗传学 癌症遗传学
- 对DNA损伤的反应反应
背景情况:
- 在细胞循环检查点和DNA修复中,阿塔克西亚 - 泰朗吉克塔西亚突变 (ATM) 蛋白激酶至关重要.
- 一种特定的ATM变种Ser49Cys (rs1800054) 与黑色素瘤风险增加有关,但其功能影响尚不清楚.
研究的目的:
- 研究ATM Ser49Cys变异对DNA损伤信号和细胞反应的功能后果.
- 为了确定这种变异是否影响黑色素瘤的发展或相关的遗传特征.
主要方法:
- 通过使用患者衍生的淋巴细胞系和对该变体异构的原发性黑色细胞细胞来对DNA损伤作出反应,评估了ATM依赖的信号传递.
- 评估了变体对瘤基因诱导衰老的影响.
- 进行了基因组和全基因组关联研究 (GWAS) 对黑色素瘤,鼻和皮肤颜色数据的分析.
主要成果:
- 在DNA损伤后,ATM Ser49Cys变种保持了功能性急性p53依赖信号.
- 变异性基因的表达降低了瘤基因诱导衰老的有效性,表明慢性压力反应存在缺陷.
- 通过基因组和GWAS分析,没有发现该变体与黑色素瘤,鼻或皮肤颜色之间的关联.
结论:
- ATM Ser49Cys变体对急性DNA损伤反应的影响最小,但在对基因过度表达的慢性反应中表现出功能减少.
- 这种适度的功能丧失表明,该变异可能充当修饰者,影响ATM/p53信号通路中其他遗传变异的影响.
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