无意义的突变加快了肺部疾病,并降低了囊性纤维化儿童的生存率
Annalisa Orenti1, Iwona Pranke2, Caroline Faucon3
1Department of Clinical Sciences and Community Health, Laboratory of Medical Statistics, Biometry and Epidemiology "G. A. Maccacaro", University of Milan, Milan, Italy.
概括
患有囊性纤维化 (pwCF) 两种无意义突变 (PTC/PTC) 的患者经历了更快的肺功能下降和更高的死亡率. 这项研究强调了PTC/PTC突变对CF进展和生存的严重影响.
科学领域:
- 肺部病理学 肺部病理学
- 遗传学 是一个遗传学.
- 医学研究 医学研究
背景情况:
- 关于携带两个无意义突变 (PTC/PTC) 的囊性纤维化 (CF) 个体的临床状态的数据有限.
- 了解与不同CFTR突变类型相关的疾病严重程度对于患者管理和治疗开发至关重要.
研究的目的:
- 为了比较患有两个无意义突变 (PTC/PTC) 的囊性纤维化 (pwCF) 患者的疾病严重程度,与患有复合异合体 (F508del/PTC) 和同合体 (F508del/F508del) F508del突变的人进行比较.
- 评估具有PTC/PTC突变的pwCF的鼻上皮细胞中的CFTRmRNA和蛋白质活性.
主要方法:
- 来自欧洲CF协会患者登记处的高收入和中等收入国家的pwCF临床数据的回顾性分析.
- 对不同CFTR突变组的疾病进展指标 (例如FEV1下降,死亡率,Pseudomonas aeruginosa感染率) 的比较.
- 评估CFTR mRNA和蛋白质活性在22个pwCF具有PTC/PTC突变的初级人类鼻上皮细胞 (HNE) 中.
主要成果:
- 具有PTC/PTC和F508del/PTC突变的pwCF显示,与F508del/F508del相比,从童年到成年期的1秒内强迫呼气量 (FEV1) 从童年到成年期的下降明显更快.
- 儿科pwCF中死亡率明显高,其中有一个或两个PTC等位基因与F508del同卵性对相比.
- 在PTC/PTC个体中,Pseudomonas aeruginosa感染更频繁,他们的鼻腔细胞中的CFTR活性是最小的 (0-3%野生类型).
结论:
- 无意义的突变,特别是PTC/PTC基因型的突变,在患有囊性纤维化的儿童和青少年中显著降低了生存率并加速了呼吸系统疾病的进展.
- 这些发现强调了CF中PTC/PTC突变的严重临床影响.
- 针对PTC/PTC突变的向治疗是有必要的,以改善结果.
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