通过外体序列测序诊断的非免疫水胎儿的溶酶体储存障碍
Mona M Makhamreh1, Kavya Shivashankar2, Stephanie M Rice3
1Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA.
Orphanet journal of rare diseases
|July 10, 2025
概括
溶酶体储存障碍 (LSD) 占通过外基因组测序诊断的非免疫水胎儿 (NIHF) 诊断的5%. 在基因诊断的NIHF病例中,LSD占13%,MPS VII是最常见的.
科学领域:
- 遗传学 是一个遗传学.
- 代谢障碍 代谢障碍 代谢障碍
- 产前诊断 在产前诊断
背景情况:
- 溶酶体储存障碍 (LSD) 是一种遗传性代谢疾病.
- 乳腺癌是非免疫胎儿水病 (NIHF) 的重要原因之一.
- 外体测序 (ES) 越来越多地用于诊断遗传疾病.
研究的目的:
- 审查非免疫水胎儿 (NIHF) 病例中LSDs的外体序列测序 (ES) 的诊断产量.
- 为NIHF更新先前关于产前ES的元分析.
- 确定导致NIHF的LSD的流行率和频谱.
主要方法:
- 更新了产前ES研究 (2000-2024) 的系统文献搜索.
- 对41项包括研究的元分析.
- 使用美国医学遗传学和基因组学学院和ClinGen指南策划的变种.
主要成果:
- 在558例NIHF病例中,exome测序在207例 (37%) 中产生了正确的诊断.
- 在所有被诊断的NIHF病例中,LSD占558例中的27例 (5%).
- 在NIHF确诊的基因病例中,LSD占13% (27/207).
- 第七类粘多糖症 (MPS VII) 是最常见的LSD (52%的LSD病例).
- 在与LSD相关的NIHF中,高复发风险 (75%) 和血缘关系 (57%) 被发现.
结论:
- 外体序列测定在5%的NIHF病例中识别了LSD,为基因诊断的NIHF贡献了13%.
- MPS VII是最常见的LSD,呈现为NIHF.
- 由于LSD的高复发率和血缘关系率,遗传咨询和对LSD的测试至关重要.
- 酶性研究可以改善变异解释和诊断产量.
相关概念视频
Lysosomal Hydrolases
3.9K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.9K
Inborn Errors of Metabolism
246
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
246
Glucose Transporters
24.2K
Glucose transporters facilitate the transport of glucose across the cell membrane. In addition to glucose, some glucose transporters can also aid the movement of other hexoses such as fructose, mannose, and galactose.
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:
24.2K
Animal Mitochondrial Genetics
8.1K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
8.1K


