Alternating hemiplegia of childhood: no mutations in the familial hemiplegic migraine CACNA1A gene

Introduction Alternating hemiplegia of childhood (AHC) is a rare disorder m ainly characterized by attacks of hemiplegia and mental retardation. It has been often associated with migraine. The CACNA1A gene on chromosome 19 is involved in familial hemiplegic migraine and other episodic cerebral disord ers, but also with progressive neuronal damage. Methods We performed mutati on analysis in this gene in four AHC patients, using single strand conforma tion polymorphism analysis. Results We found nine polymorphisms, but no mut ations in any of the 47 exons. Conclusions Other cerebral ion channel genes remain candidate genes for AHC.