Andersen Cardiodysrhythmic Periodic Paralysis With KCNJ2 Mutations: A Novel Mutation in the Pore Selectivity Filter Residue

作者：Lim Byung Chan; Kim Gi Beom; Bae Eun Jung; Il Noh Chung; Hwang Hee; Kim Ki Joong; Hwang Yong Seung; Ko Tae Sung; Chae Jong Hee^*

来源：Journal of Child Neurology, 2010, 25(4): 490-493.

DOI：10.1177/0883073809357937

• Andersen syndrome
• mutation
• cardiac arrhythmia
• KCNJ2 gene
• periodic paralysis

Andersen cardiodysrhythmic periodic paralysis or Andersen-Tawil syndrome includes the distinct clinical features of periodic paralysis, cardiac arrhythmia, and facial and skeletal dysmorphisms and exhibits autosomal dominant inheritance. Mutations in the KCNP gene, which encodes the human inward rectifier potassium channel Kir2.1, have been identified in the majority of cases. Despite well-established clinical and molecular characteristics, treatment is still case oriented, and timely diagnosis could be delayed because of the low incidence and phenotypic heterogeneity of this disease. This article describes the clinical and molecular features of 3 cases of Andersen-Tawil syndrome in 2 families. One of the mutations (GI44D) was located in the pore selectivity filter residue (which is mutated recurrently) and was considered novel. Intermittent muscle weakness in childhood warrants careful evaluation of cardiac dysrhythmia and skeletal anomalies.

• 出版日期2010-4