Department of Neurology, College of Medicine, Seoul National University, Korea.
J Clin Neurol. 2006 Dec;2(4):268-71. doi: 10.3988/jcn.2006.2.4.268. Epub 2006 Dec 20.
Episodic ataxia type 2 (EA-2) is an inherited disorder that is characterized by intermittent vertigo, ataxia, and interictal gaze-evoked nystagmus. Although abnormalities associated with this disorder have been found in the CACNA1A gene encoding the alpha1A (Cav2.1) subunit of the P/Q-type calcium channel, there are few reports of genetically confirmed EA-2 in Korea. In 1998, a Korean family with acetazolamide-responsive hereditary paroxysmal ataxia was reported, but the genetic background was not defined at that time. In the present study we performed direct sequencing of the entire exons and their flanking intronic sequences of the CACNA1A gene and found a deletion mutation (c.2042_2043delAG).
episodic ataxia type 2 (EA-2) 是一种遗传性疾病,其特征为间歇性眩晕、共济失调和发作间期扫视诱发的眼球震颤。尽管与这种疾病相关的异常已在编码 P/Q 型钙通道的 alpha1A (Cav2.1) 亚基的 CACNA1A 基因中被发现,但在韩国,很少有遗传性 EA-2 的基因确诊报告。1998 年,曾有一个韩国家族报道了对乙酰唑胺有反应的遗传性阵发性共济失调,但当时并未明确其遗传背景。在本研究中,我们对 CACNA1A 基因的全部外显子及其侧翼内含子序列进行了直接测序,发现了一个缺失突变(c.2042_2043delAG)。