Diagnostic challenge of Diamond–Blackfan anemia in mothers and children by whole-exome sequencing

Takuya Ichimura, Kenichi Yoshida, Yusuke Okuno, Toshiaki Yujiri, Kozo Nagai, Masanori Nishi, Yuichi Shiraishi, Hiroo Ueno, Tsutomu Toki, Kenichi Chiba, Hiroko Tanaka, Hideki Muramatsu, Toshiro Hara, Hitoshi Kanno, Seiji Kojima, Satoru Miyano, Etsuro Ito, Seishi Ogawa, Shouichi Ohga

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Diamond–Blackfan anemia (DBA) is a pure red cell aplasia that arises from defective ribosomal proteins (RPs). Patients with this rare ribosomopathy present with neonatal anemia and occasional dysmorphism. Clinical heterogeneity and clusters of causative RP genes hamper the diagnosis and perinatal management. We report three mother-and-child pairs of anemia who were finally diagnosed by whole-exome sequencing. Each pair showed distinct disease severity and response to anemia treatment. Only one mother had the diagnostic dysmorphism, including short stature, webbed neck, and thenar hypoplasia. This mother had a frame-shift mutation of RPL11 (exon 3, c.58_59del). Her infant showed transient neonatal anemia, but had no mutations of RP genes. The other mother–child pairs had a missense mutation of RPS19 (exon 4, c.185G>A), and a splicing error of RPS7 (exon 3, c.76-1G>T), respectively. Other than the reported mutations, there were no variants in genes significantly associated with anemia. Our results suggested that whole-exome sequencing (WES) is effective for achieving a prompt and correct diagnosis of human ribosomopathy.

Original languageEnglish
Pages (from-to)515-520
Number of pages6
JournalInternational journal of hematology
Volume105
Issue number4
DOIs
Publication statusPublished - Apr 1 2017

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All Science Journal Classification (ASJC) codes

  • Hematology

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