相关实验视频
Updated: Feb 7, 2026

08:57
Amplicon Sequencing using the Long-Read Sequencing Technologies
Published on: August 29, 2025
537
基准测试长读测序方法来解决 facioscapulohumeral dystrophy 位复杂性的复杂性
Charlotte Tardy1,2, Jean Philippe Trani1, Victor Murcia Pienkowski1
1Aix-Marseille Univ-INSERM, Marseille Medical Genetics, Marseille, 13005, France.
Brain : a journal of neurology
|February 5, 2026
概括
通过在4q35位点识别复杂的结构变异,改善了面骨骨缩症 (FSHD) 的诊断. 这些变异在标准测试中没有发现,对于缺乏FSHD1/FSHD2遗传原因的患者来说至关重要.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 面骨骨缩症 (FSHD) 与D4Z4宏观卫星阵列在4q35.5的收缩有关.
- FSHD1涉及D4Z4收缩 (1-10单位) 和减少DNA甲基化.
- FSHD2来自SMCHD1变异,导致4q35.5的表观遗传放松调节.
研究的目的:
- 在没有确定的遗传原因的FSHD患者中分析4q35/10q26的复杂结构变异.
- 通过使用长读测序来解决这些变体的结构和甲基化模式.
- 评估这些结构变异对非典型FSHD病例的诊断相关性.
主要方法:
- 在7个代表性FSHD病例上进行了高分辨率的长读测序 (牛津纳米孔,PacBio).
- 对4q35和10q26位点进行了详细的结构和表观遗传分析.
- 长读序列策略的比较,用于解决复杂的重排序.
主要成果:
- 确定了D4Z4和亚端粒元素之间的染色体内重组,导致可变缺失.
- 解决了复杂结构变体的核酸水平架构和甲基化模式.
- 证明这些变异无法通过像生物纳米光学基因组测绘这样的标准方法来检测.
结论:
- 在4q35/10q26的复杂结构变异是非典型遗传特征患者FSHD的重要原因.
- 深入的分子表征对于诊断FSHD患者的FSHD1/FSHD2.2阴性是必不可少的.
- 在没有SMCHD1变异的情况下,结构变异可能是致病的,有助于诊断和遗传咨询.
相关概念视频
Uncertainty in Measurement: Reading Instruments
53.1K
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
53.1K
Locus of Control
227
Locus of control describes how individuals perceive the causes of events in their lives, influencing motivation and well-being. Introduced by Julian Rotter in 1954, it is categorized into internal and external locus of control.Internal Locus of ControlIndividuals with an internal locus of control believe their actions determine outcomes, fostering responsibility, self-efficacy, and motivation. For example, an employee may attribute career success to hard work. Research links this mindset to...
227
Root-Locus Method
518
A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
This system can be represented by a block...
This system can be represented by a block...
518
Construction of Root Locus
419
The construction of a root locus involves several key steps to analyze and visualize the behavior of a system's poles with varying gain. The number of branches in the root locus equals the number of closed-loop poles and is symmetrical about the real axis.
For positive gain values, the root locus exists on the real axis to the left of an odd number of finite open-loop poles or zeros. The root locus starts at the open-loop poles and traces the paths of the closed-loop poles as the gain...
For positive gain values, the root locus exists on the real axis to the left of an odd number of finite open-loop poles or zeros. The root locus starts at the open-loop poles and traces the paths of the closed-loop poles as the gain...
419
Properties of the Root Locus
308
The root locus method is an invaluable tool for analyzing higher-order systems without needing to factor the denominator of the transfer function. A pole of the system is identified when the characteristic polynomial in the transfer function's denominator equals zero.
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
308
Rotter's Locus of Control
957
Julian Rotter introduced the concept of locus of control, a cognitive factor that significantly influences personality development and learning. Locus of control refers to an individual's beliefs about the extent of control they have over events in their lives. According to Rotter, this belief system can be categorized into two types: internal and external locus of control.
Individuals with an internal locus of control believe that their personal efforts and decisions directly affect their...
Individuals with an internal locus of control believe that their personal efforts and decisions directly affect their...
957

