Molecular basis of Diamond-Blackfan anemia: New findings from the Italian registry and a review of the literature

Maria Francesca Campagnoli, Emanuela Garelli, Paola Quarello, Adriana Carando, Stefania Varotto, Bruno Nobili, Daniela Longoni, Vanna Pecile, Marco Zecca, Carlo Dufour, Ugo Ramenghi, Irma Dianzani

Research output: Contribution to journalArticlepeer-review

Abstract

Background. Diamond-Blackfan anemia (DBA) is a rare, pure red blood cell aplasia of childhood caused by an intrinsic defect in erythropoietic progenitors. Malformations occur in about 40% of patients. More than half of patients respond to steroids; non-responders need chronic transfusions or stem cell transplantation (SCT). Mutations in the gene encoding ribosomal protein S19 are found in 25% of patients, but the link with erythropoiesis is unclear. A second DBA locus has been found on chromosome 8p22-p23; analysis of genes of the region is in progress. Methods and Information Sources. We present clinical and molecular data from 97 Italian DBA patients and a review of the literature. Results and State of the Art. We describe five new RPS19 gene mutations: four point mutations and one unbalanced chromosomal translocation. Hematologic findings, malformations and outcome are similar in the RPS19 mutated and the non-mutated groups. No genotype-phenotype correlation has been found so far in RPS19 mutated patients. Our data, however, and a thorough review of literature show a worse outcome (expressed as transfusion dependence) in patients with mutations that completely abolish one allele, i.e. gross chromosomal rearrangements and mutations at the initiation codon. The association of mental retardation with large deletions at the 19q locus points to a contiguous gene syndrome. A recurrent missense mutation (Arg62Trp) is associated with transfusion dependence in eight of the nine reported cases. Perspectives. Nationwide collaboration and population-based registries recording molecular data are essential for the further dissection of this rare heterogeneous disease and the definition of new therapeutic trials.

Original languageEnglish
Pages (from-to)480-489
Number of pages10
JournalHaematologica
Volume89
Issue number4
Publication statusPublished - Apr 2004

Keywords

  • Diamond-Blackfan anemia
  • Erythropoiesis
  • Mutation
  • RPS19

ASJC Scopus subject areas

  • Hematology

Fingerprint Dive into the research topics of 'Molecular basis of Diamond-Blackfan anemia: New findings from the Italian registry and a review of the literature'. Together they form a unique fingerprint.

Cite this