Alström syndrome: genetics and clinical overview.

Alström syndrome: genetics and clinical overview.
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Alström综合征:遗传学和临床概述。

DOI:
10.2174/138920211795677912
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发表时间:
2011-05
期刊:
影响因子:
2.6
通讯作者:
Naggert JK
Naggert JK
中科院分区:
生物学4区
文献类型:
--
作者:
Marshall JD;Maffei P;Collin GB;Naggert JK

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Alström综合征是一种罕见的常染色体隐性遗传疾病,其特征为锥杆营养不良、听力损失、儿童躯干肥胖、胰岛素抵抗和高胰岛素血症、2型糖尿病、高胰岛素血症、成年期身材矮小、心肌病和进行性肺、肝和肾功能障碍。症状首先出现在婴儿期,多器官病变的逐步发展导致预期寿命缩短。发病年龄和临床症状严重程度的变异性,甚至在家庭内,可能是由于遗传背景。Alström综合征是由ALMS 1突变引起的,ALMS 1是一个由23个外显子组成的大基因,编码4,169个氨基酸的蛋白质。一般来说,ALMS 1基因缺陷包括插入、缺失和导致蛋白质截短的无义突变,主要存在于外显子8、10和16中。存在多个替代接头形式。ALMS 1蛋白存在于受疾病影响的所有组织的中心体、基体和胞质溶胶中。ALMS 1作为纤毛蛋白的鉴定解释了观察到的表型的范围及其与其他纤毛病如Bardet-Biedl综合征的相似性。涉及Alström综合征的小鼠和细胞模型的研究为深入了解肥胖和2型糖尿病以及其他临床问题的致病机制提供了线索。最终,对Alström综合征发病机制的研究应该会为个体带来更好的管理和治疗,并对其他罕见的纤毛病以及肥胖和糖尿病的更常见原因以及普通人群中常见的其他疾病具有潜在的重要影响。
Alström syndrome is a rare autosomal recessive genetic disorder characterized by cone-rod dystrophy, hearing loss, childhood truncal obesity, insulin resistance and hyperinsulinemia, type 2 diabetes, hypertriglyceridemia, short stature in adulthood, cardiomyopathy, and progressive pulmonary, hepatic, and renal dysfunction. Symptoms first appear in infancy and progressive development of multi-organ pathology leads to a reduced life expectancy. Variability in age of onset and severity of clinical symptoms, even within families, is likely due to genetic background. Alström syndrome is caused by mutations in ALMS1, a large gene comprised of 23 exons and coding for a protein of 4,169 amino acids. In general, ALMS1 gene defects include insertions, deletions, and nonsense mutations leading to protein truncations and found primarily in exons 8, 10 and 16. Multiple alternate splice forms exist. ALMS1 protein is found in centrosomes, basal bodies, and cytosol of all tissues affected by the disease. The identification of ALMS1 as a ciliary protein explains the range of observed phenotypes and their similarity to those of other ciliopathies such as Bardet-Biedl syndrome. Studies involving murine and cellular models of Alström syndrome have provided insight into the pathogenic mechanisms underlying obesity and type 2 diabetes, and other clinical problems. Ultimately, research into the pathogenesis of Alström syndrome should lead to better management and treatments for individuals, and have potentially important ramifications for other rare ciliopathies, as well as more common causes of obesity and diabetes, and other conditions common in the general population.
DOI: 10.1136/jmg.27.9.590
发表时间: 1990-09-01
影响因子: 4
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期刊: NATURE
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发表时间: 2006-04-21
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