Abstract
The porphyrias are a group of inherited metabolic diseases, with each due to the deficient activity of a specific enzyme in the heme biosynthetic pathway. These are inherited as autosomal dominant, autosomal recessive, or X-linked traits, with the exception of Porphyria Cutanea Tarda, which is usually sporadic. The most common manifestations are related to the accumulation of porphyrin precursors or porphyrins, resulting in either acute neurological attacks, or cutaneous photosensitivity, or both. Multiple mutations have been identified in the genes, encoding the specific enzyme that is deficient in each of the porphyrias. Specific diagnosis criteria and treatment modalities are available for the porphyrias.
Original language | English (US) |
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Title of host publication | Emery and Rimoin’s Principles and Practice of Medical Genetics and Genomics |
Subtitle of host publication | Metabolic Disorders |
Publisher | Elsevier |
Pages | 373-411 |
Number of pages | 39 |
ISBN (Electronic) | 9780128125359 |
DOIs | |
State | Published - Jan 1 2020 |
Keywords
- Acute attacks
- Acute hepatic porphyrias
- DNA diagnostics
- Erythropoietic protoporphyrias
- Heme biosynthesis
- Phototoxicity
- Treatment
ASJC Scopus subject areas
- General Medicine
- General Biochemistry, Genetics and Molecular Biology