相关实验视频
Updated: Jul 6, 2025

12:11
A Rhodopsin Transport Assay by High-Content Imaging Analysis
Published on: January 16, 2019
6.5K
15名沙特阿克罗马托普西亚患者的表型和基因型:一个病例系列
Enam Danish1, Amal Alhashem2, Reham Aljehani3
1Department of Ophthalmology, King Fahad Armed Forces Hospital, Jeddah, Saudi Arabia.
概括
阿克罗马托普西亚是一种罕见的遗传性眼睛疾病,与CNGA3基因和沙特阿拉伯的高血缘关系率有关. 对于因这种衰弱性疾病而受影响的家庭,建议进行遗传咨询.
科学领域:
- 眼科医生 眼科 眼科
- 医学遗传学 医学遗传学
- 视网膜疾病 视网膜疾病
背景情况:
- 阿克罗马托普西亚是一种罕见的静止视网膜疾病,影响形光受体,导致光恐惧症,阴影,视力敏度降低和色盲.
- 鉴定致病基因,例如循环核酸通道子单元α3 (CNGA3),对于理解和潜在治疗色斑症至关重要.
- 基因治疗研究强调了详细的基因型-表型相关性对治疗策略的重要性.
研究的目的:
- 来自沙特阿拉伯的患者中描述了阿克罗马托普西亚的临床表现和遗传突变.
- 在沙特人口中识别与阿克罗马托普西亚相关的关键风险因素和遗传变异.
- 为潜在的遗传咨询和治疗干预提供基础数据.
主要方法:
- 一个涉及15名疑似染色症患者的病例系列,正在接受全面的眼科和全身评估.
- 使用全外体序列测序进行的基因分析,用于表现出典型的亚克罗马托普西亚表型的患者.
- 详细的临床评估,包括视敏度, fundus 检查和电网膜学.
主要成果:
- 所有患者都呈现了阴囊和视力敏度低下; 93.3%的患者患有光恐惧症和完全的色盲.
- 在家庭中观察到高血缘关系率 (82%),父母充当了与染色体相关突变的携带者.
- CNGA3基因是最常见的基因型,在66.7%的患者中发现了致病变体c.661C>T,通常处于同卵性状态.
结论:
- 在这个人群中,血缘关系和部落属性是对亚染色遗传的重要风险因素.
- 在研究的沙特队列中,CNGA3基因,特别是c.661C>T变异,是导致色素的主要遗传原因.
- 增加意识和遗传咨询对于受到这种严重视力障碍影响的家庭至关重要.
相关概念视频
Photoreceptors and Visual Pathways
6.0K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.0K
Genetic Lingo
102.8K
Overview
102.8K
Pleiotropy
40.5K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
40.5K
Incomplete Dominance
22.6K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
22.6K
Pedigree Analysis
84.3K
Overview
84.3K
Human Genetics
576
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
576

