与CLCN4相关的发育性和性脑病变中的基因型-表型相关性
Ahmed N Sahly1,2, Juan Sierra-Marquez3,4, Stefanie Bungert-Plümke3
1Division of Neurology, Department of Pediatrics, Montreal Children's Hospital, McGill University Health Centre, Montreal, QC, Canada.
Human genetics
|April 5, 2024
概括
与CLCN4相关的疾病是一种罕见的X相关的神经发育状况,涉及改变的ClC-4运输功能. 在CLCN4的变体导致和发育障碍,与不同的临床表现和大脑形.
科学领域:
- 神经遗传学 神经遗传学
- 离子通道功能的功能
- 与X相关的疾病X相关的疾病
背景情况:
- 与CLCN4相关的疾病是一种罕见的X相关的神经发育状况,其致病机制不明确.
- CLCN4编码了囊状2Cl-/H+交换器ClC-4,它的变体经常改变运输活动.
- 与ClC-3一起,ClC-4与内性离子稳态和细胞内贩运有关.
研究的目的:
- 研究患者中CLCN4变异的致病机制.
- 描述已识别的CLCN4变异对ClC-4运输活动的功能影响.
- 在患有发育性和性脑病变的男性患者中,将基因型与表型关联起来.
主要方法:
- 通过数据库审查和彻底的表型识别来识别患者.
- 使用补丁电生理学对哺乳动物细胞中CLCN4变异的功能分析.
- 蛋白质生物化学和共聚焦光显微镜来评估变异效应.
主要成果:
- 确定了三名患有发育性和性脑病变的男性患者,并确定了不同的表型.
- 这种p.(Gly342Arg) 变体损害了ClC-4与ClC-3的异构化,并抑制了离子电流.
- 变种p.(Ile549Leu) 和p.(Asp89Asn) 改变了依赖电压的ClC-4传输的激活,p.(Asp89Asn) 显示了增加的活性.
结论:
- CLCN4变体p.(Gly342Arg) 和p.(Ile549Leu) 损害了ClC-4的运输功能,而p.(Asp89Asn) 则导致了运输功能的增加.
- 这三种变体都导致和全球发育障碍.
- 在患有不同CLCN4变异的患者中观察到表型变异性,包括的呈现,生长参数和大脑形.
更多相关视频
相关概念视频
Seizures: Classification
340
Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
340
Arteries of the Lower Limbs
188
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
188
Pleiotropy
40.4K
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,...
40.4K
Inborn Errors of Metabolism
157
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...
157
Genetic Lingo
102.7K
Overview
102.7K
Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders
610
Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within...
Researchers have identified genetic factors that increase susceptibility to schizophrenia, underscoring the intricate interplay between genetics and environment in disease development. At the core of schizophrenia's pathophysiology is excessive dopaminergic neurotransmission within...
610


