Journal
INTERNATIONAL JOURNAL OF HEMATOLOGY
Volume 105, Issue 4, Pages 515-520Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s12185-016-2151-7
Keywords
Diamond-Blackfan anemia; Ribosomal protein; Inherited bone marrow failure syndrome; Whole-exome sequencing
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Funding
- Ministry of Health Labour and Welfare of Japan [H23012]
- Ministry of Health, Labour and Welfare of Japan [H23-029]
- Grants-in-Aid for Scientific Research [26221308, 26461421, 15K09647, 16K10041] Funding Source: KAKEN
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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 hypo-plasia. 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.
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