Interstitial lung disease in two brothers with novel compound heterozygous ABCA3 mutations

Hiroshi Kitazawa, Kunihiko Moriya, Hidetaka Niizuma, Kengo Kawano, Yuka Saito-Nanjo, Toru Uchiyama, Takeshi Rikiishi, Yoji Sasahara, Osamu Sakamoto, Yasuhiro Setoguchi, Shigeo Kure

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Mutations in genes critical for surfactant metabolism, including surfactant protein C (SP-C) and ABCA3, are well-recognized causes of interstitial lung disease. Recessive mutations in ABCA3 were first attributed to fatal respiratory failure in full-term neonates, but they are also increasingly being recognized as a cause of respiratory disorders with less severe phenotypes in older children and also adults. Here, we report a 20-month-old boy with interstitial lung disease caused by two distinct ABCA3 mutations. Initial treatment with methylprednisolone was unsuccessful, but the additional administration of hydroxychloroquine was effective. The family history revealed that the patient's older brother had died of idiopathic interstitial lung disease at 6 months of age, suggesting a genetic etiology of the disease. Sequence analyses of SP-C and ABCA3 genes were performed using DNA samples from the patient himself, his parents, and his brother. These analyses revealed novel compound heterozygous mutations in the coding exons of ABCA3 in both the patient and his brother: c.2741A > G, of paternal origin, and c.3715-3716insGGGGGG, of maternal origin. Conclusion Since ABCA3 mutations seem to be a heterogeneous entity with various phenotypes, we recommend genetic testing for mutations in SP-C and ABCA3 genes to be considered in children with unexplained interstitial lung disease.

Original languageEnglish
Pages (from-to)953-957
Number of pages5
JournalEuropean Journal of Pediatrics
Volume172
Issue number7
DOIs
Publication statusPublished - 2013 Jul 1

Keywords

  • ABCA3
  • Hydroxychloroquine
  • Interstitial lung disease
  • Surfactant deficiency

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

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