霍格 - 詹森综合征是什么?
Gunnar Douzgos Houge1, Sofia Douzgou Houge2, Tzung-Chien Hsieh3
1Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway. gunnar.houge@helse-bergen.no.
European journal of human genetics : EJHG
|June 24, 2025
概括
霍格-詹森氏综合征 (HJS) 是由蛋白酸酶2A型 (PP2A) 功能障碍引起的,导致神经发育延迟和发作. 本综述探讨了HJS亚型,重点关注PP2A.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 霍格-詹森氏综合征 (HJS) 是一种与蛋白酸酶2A型 (PP2A) 功能障碍相关的遗传疾病.
- 核心特征包括神经发育迟缓,低血压,和行为问题.
- PP2A可以抵消增长促进通路中的酶,例如PIK3CA/AKT/mTOR和RAS/MAPK.
研究的目的:
- 审查HJS的临床谱.
- 阐明已知和潜在的致病机制,这些机制是HJS的基础.
- 解释不同HJS亚型之间的生化和临床重叠.
主要方法:
- 对临床和遗传数据的文献综述.
- 分析PP2A功能及其在细胞信号通路中的作用.
- 在PP2A子单元 (PPP2R5D,PPP2R5C,PPP2R1A,PPP2CA) 中检查致病变体.
主要成果:
- 在PP2A子单元PPPP2R5D (HJS类型1),PPPP2R5C (HJS类型4),PPPP2R1A (HJS类型2) 和PPPP2CA (HJS类型3) 中的致病变体导致HJS.
- 降低PP2A活性可以促进生长,可能导致巨头症或癌症.
- 在HJS亚型之间存在显著的重叠,这表明共享的潜在机制.
结论:
- 了解PP2A功能障碍对于HJS诊断和管理至关重要.
- 需要进一步的研究才能完全解决PP2A基质的特异性和活性.
- 潜在的治疗策略可能涉及针对PP2A活动或子单元相互作用的小分子.
相关概念视频
Vascular Spasm
1.9K
The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
1.9K
Hypersensitivities
1.1K
Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
Types of Hypersensitivities
Hypersensitivity reactions are categorized into four types: Type 1, Type 2, Type 3, and Type 4. Each type has a distinct mechanism...
1.1K
Sympathetic Pathways: Sympathetic Chain Ganglia
3.5K
The sympathetic chain ganglia, also known as the sympathetic trunk ganglia or paravertebral ganglia, are a series of ganglia located bilaterally on either side of the spinal column. These ganglia serve as relay stations for the sympathetic nervous system. Preganglionic neurons originating in the spinal cord project their axons to the sympathetic chain ganglia. Within the ganglia, these preganglionic fibers synapse with postganglionic neurons.The postganglionic neurons of the sympathetic trunk...
3.5K
Mitral Stenosis I: Introduction
50
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
50
Visual Agnosia
330
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
330
Mitral Stenosis II: Clinical features and Diagnostic Tests
39
Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...
39


