[脊柱肌肉缩I型的自然史]
D V Vlodavets1, Yu N Linkova2, A V Zinkina-Orikhan2
1Veltischev Clinical Pediatric Research Institute of Pirogov Russian National Research Medical University (Pirogovsky University), Moscow, Russia.
Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova
|December 18, 2024
概括
脊髓肌肉缩 (SMA) 是一种遗传的神经肌肉疾病. 这份对646名SMA型I儿童的综述强调,SMN2基因拷贝数和支持性疗法显著影响生存和疾病进展.
科学领域:
- 神经学 神经学
- 遗传学 是一个遗传学.
- 儿科 儿科 儿科
背景情况:
- 脊髓肌肉缩 (SMA) 是一种罕见的遗传神经肌肉疾病,影响运动神经元.
- 它是由SMN1基因的突变引起的,SMN2基因拷贝数影响疾病严重程度.
- 目前的治疗方法旨在增加SMN蛋白水平,因此需要自然史数据来评估疗效.
研究的目的:
- 在一大批儿童中分析SMA I型的自然史.
- 为了将疾病进展和生存与SMN2基因拷贝数和临床干预相关联.
- 为评估新兴SMA疗法的有效性提供必要的数据.
主要方法:
- 一项对16年来发表的12项回顾性和前性研究的系统审查.
- 分析包括了646名被诊断为SMA型I的儿童的数据.
- 关键数据点包括发病年龄,SMN2基因拷贝数,存活率和支持性护理的使用.
主要成果:
- 症状发作的平均年龄为2.1个月;常见的症状包括低血压,呼吸困难和食困难.
- 复合终点 (死亡或长期呼吸支持) 的中位数年龄为7.7个月.
- 拥有3个SMN2副本的儿童的存活时间明显更长 (22.7个月) 与拥有2个副本 (6.6个月) 的儿童相比.
- 支性疗法,如气管切除术,胃口切除术和维持疗法,对预期寿命产生了积极的影响.
结论:
- SMN2基因拷贝数是SMA型I生存的关键决定因素.
- 早期诊断和全面的支持性护理对于改善SMA患者的治疗结果至关重要.
- 持续的自然史研究对于评估新型SMA治疗的长期影响至关重要.
更多相关视频
09:07Electrophysiological Motor Unit Number Estimation MUNE Measuring Compound Muscle Action Potential CMAP in Mouse Hindlimb Muscles
Published on: September 25, 2015
21.1K
06:06A Functional Motor Unit in the Culture Dish: Co-culture of Spinal Cord Explants and Muscle Cells
Published on: April 12, 2012
15.3K
相关概念视频
01:21Satellite Stem Cells and Muscular Dystrophy
1.9K
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
1.9K
01:28Disorders of the Skeletal Muscle
871
The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
871
01:26Cross-bridge Cycle
116.8K
As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.
116.8K
01:26Chemical Synapses
8.7K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
8.7K