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First Japanese case of Pierson syndrome with mutations in LAMB2
Author(s) -
Togawa Hiroko,
Nakanishi Koichi,
Mukaiyama Hironobu,
Hama Taketsugu,
Shima Yuko,
Nakano Masaru,
Fujita Naoya,
Iijima Kazumoto,
Yoshikawa Norishige
Publication year - 2013
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.2012.03629.x
Subject(s) - medicine , congenital nephrotic syndrome , exon , mutation , nephrotic syndrome , pediatrics , genetics , gene , kidney , biology , proteinuria
Abstract Pierson syndrome (OMIM 609049) is typically characterized by congenital nephritic syndrome and peculiar ocular anomalies with microcoria. It is caused by mutations in LAMB2 , which encodes laminin β2. Approximately 50 mutations of LAMB2 from approximately 40 unrelated families have been identified; however, most of them were from Western countries. Although three patients in Asia with mutations of LAMB2 have been reported, they were not typical cases. We report the first Japanese case of Pierson syndrome with proven causative LAMB2 mutations. She presented with congenital nephrotic syndrome and bilateral microcoria at birth, and developed end‐stage renal disease at 2 months of age. This is the first report of a typical case from Asia. LAMB2 analysis by direct sequencing revealed the compound heterozygous mutations c.3974_3975insA (p.N1325KfsX1331, maternal, novel) in exon 25 and c.4519C>T (p.Q1507X, paternal) in exon 27. The phenotype due to LAMB2 mutations appears to be similar between different ethnic groups.