C9orf72 在6个多代亲属中重复扩张不一致
Marie Ryan1, Mark A Doherty1, Ahmad Al Khleifat1
1From the Academic Unit of Neurology (M.R., E.C., M.H., O.H.) and Smurfit Institute of Genetics (M.A.D., J.C.H., R.L.M.), Trinity College Dublin, Ireland; Department of Basic and Clinical Neuroscience (A.A., A.A.-C.), Maurice Wohl Clinical Neuroscience Institute, King's College London, United Kingdom; Department of Psychology (E.C.), Beaumont Hospital, Dublin, Ireland; King's College Hospital (A.A.-C.), London, United Kingdom; and Department of Neurology (O.H.), Beaumont Hospital, Dublin, Ireland.
患有C9orf72重复扩张的个体的家庭成员可能面临缩性侧面硬化症 (ALS) 的风险增加,无论他们的遗传载体状态如何. 这一发现影响了遗传风险评估和为亲属提供咨询.
科学领域:
- 遗传学 遗传学 是一个
- 神经学 神经学
- 分子生物学分子生物学
背景情况:
- C9orf72基因重复扩张是肌缩侧面硬化症 (ALS) 和前性痴呆症的主要遗传原因.
- 在受影响的血统中,表型变异性和不完全的透性仍然不太清楚.
- 在C9orf72扩张载体的亲属中观察到一种独特的认知内因型,无论载体状态如何.
研究的目的:
- 调查携带C9orf72重复扩张的家族中观察到的认知内因型的潜在共同遗传或环境因素.
- 通过C9orf72重复扩展,对多代爱尔兰亲属的遗传模式进行详细的横截面研究.
主要方法:
- 从爱尔兰人口登记册中确定了131个家族ALS血统,其中59个 (45.0%) 携带C9orf72重复扩散.
- 使用重复原始PCR进行C9orf72基因型定型,并补充了SNP,向测序,全外基因组和全基因组测序.
- 专注于21个有多个受影响成员的亲属和可用的DNA进行详细的隔离分析.
主要成果:
- 在研究的21个 (28.6%) 亲属中,在6个亲属中观察到不一致的C9orf72重复扩张分离.
- 在两个家族中,C9orf72亚型与受影响的携带者分离,但与不受影响的亲属没有分离.
- 在不一致的亲属中没有发现额外的ALS相关的致病变体.
结论:
- 家庭成员的C9orf72重复扩张亲属可能有高风险的ALS,独立于他们的载体状态.
- 这些发现需要对对无症状亲属的遗传风险评估和咨询策略进行重新评估.
- 需要进一步的研究来阐明这种不依赖运营商的风险背后的机制.
更多相关视频
08:22A Robust Polymerase Chain Reaction-based Assay for Quantifying Cytosine-guanine-guanine Trinucleotide Repeats in Fragile X Mental Retardation-1 Gene
Published on: September 16, 2019
08:53Assay to Measure Nucleocytoplasmic Transport in Real Time within Motor Neuron-like NSC-34 Cells
Published on: May 16, 2017
相关概念视频
Gene Duplication and Divergence
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
Comparing Copy Number Variations and SNPs
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Exon Recombination
Exon shuffling follows “splice frame rules.” Each exon...
Pleiotropy
Restarting Stalled Replication Forks
Single Nucleotide Polymorphisms-SNPs
