Neurotherapeutics

, Volume 4, Issue 2, pp 216–224

Genotype-Phenotype correlation and therapeutic rationale in hyperkalemic periodic paralysis

Article

DOI: 10.1016/j.nurt.2007.02.001

Cite this article as:
Jurkat-Rott, K. & Lehmann-Horn, F. Neurotherapeutics (2007) 4: 216. doi:10.1016/j.nurt.2007.02.001

Summary

Familial hyperkalemic periodic paralysis (PP) is a dominantly inherited muscle disease characterized by attacks of flaccid weakness and intermittent myotonia. Some patients experience muscle stiffness that is aggravated by cold and exercise, bordering on the diagnosis of paramyotonia congenita. Hyperkalemic PP and paramyotonia congenita are allelic diseases caused by gain-of-function mutations of the skeletal muscle sodium channel, Nav1.4, which is essential for the generation of skeletal muscle action potentials. In this review, the functional and clinical consequences of the mutations and therapeutic strategies are reported and the differential diagnoses discussed. Also, the question is addressed of whether hyperkalemic PP is truly a different entity than normokalemic PP. Additionally, the differential diagnosis of Andersen—Tawil syndrome in which hyperkalemic PP attacks may occur will be briefly introduced. Last, because hyperkalemic PP has been described to be associated with an R83H mutation of a MiRP2 potassium channel subunit, evidence refuting disease-causality in this case will be discussed.

Key Words

Hyperkalemic periodic paralysismyotoniahypokalemic periodic paralysisAndersen—Tawil syndromevoltage-gated sodium channelchannelopathies
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Copyright information

© Springer New York 2007

Authors and Affiliations

  1. 1.Department of Applied PhysiologyUlm UniversityUlmGermany