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Late-onset erythropoietic porphyria caused by a chromosome 18q deletion in erythroid cells.

Abstract
The erythropoietic porphyrias, erythropoietic protoporphyria and congenital erythropoietic porphyria, result from germline mutations in the ferrochelatase gene and uroporphyrinogen III synthase gene, respectively. Both conditions normally present in childhood but rare cases with onset past the age of 40 y have been reported. Here we show that late-onset erythropoietic protoporphyria can be caused by deletion of the ferrochelatase gene in hematopoietic cells with clonal expansion as part of the myelodysplastic process. This is the first direct demonstration of porphyria produced by an acquired molecular defect restricted to one tissue. Some other cases of late-onset erythropoietic porphyria may be explained by a similar mechanism.
AuthorsC Aplin, S D Whatley, P Thompson, T Hoy, P Fisher, C Singer, C R Lovell, G H Elder
JournalThe Journal of investigative dermatology (J Invest Dermatol) Vol. 117 Issue 6 Pg. 1647-9 (Dec 2001) ISSN: 0022-202X [Print] United States
PMID11886534 (Publication Type: Case Reports, Journal Article)
Chemical References
  • Ferrochelatase
Topics
  • Age of Onset
  • Alleles
  • Bone Marrow Cells
  • Chromosome Aberrations
  • Chromosomes, Human, Pair 18
  • Ferrochelatase (genetics)
  • Gene Deletion
  • Humans
  • Male
  • Middle Aged
  • Porphyria, Erythropoietic (genetics)

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