Identification of Acute Intermittent Porphyria Modifying Genes
This study proposes to identify the predisposing/protective modifying genes that underlie the acute attacks in symptomatic patients with Acute Intermittent Porphyria (AIP), an autosomal dominant inborn error of heme biosynthesis.
• Willing and able to give informed consent
• 12 years of age or older
• Willingness to provide blood/saliva and urine samples, and clinical information
• A member of an AIP family, defined as (must meet one of the following):
‣ proband: possesses an AIP pathogenic mutation and is/has been symptomatic (experienced acute attacks in the opinion of the investigator)
⁃ Parents (no known HMBS mutations or heterozygote with familial mutation)
⁃ First, second, or third degree relative of (a) or (b)