PubMed · 11426499
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G Savidge, M Smith. 2001. Mutations in the factor XI gene.. https://doi.org/10.1002/1096-8652(200101)66%3A1%3C67%3A%3Aaid-ajh1014%3E3.0.co%3B2-p
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B lymphocyte-induced maturation protein 1 (BLIMP1)/PR domain containing 1 with zinc finger domain (PRDM1) is a transcriptional repressor with a SET domain and Kruppel-type zinc fingers. BLIMP1/PRDM1 is expressed in a subset of germinal center B cells and in all plasma cells, and it is required for terminal B-cell differentiation. Mutations of the BLIMP1 gene have been reported in patients with diffuse large B-cell lymphoma. Here, we describe novel mutations in the BLIMP1 gene in 2 of 15 (13%) cases of B-cell lymphoma (two cases of primary effusion lymphoma and 13 cases of diffuse large B-cell lymphoma). A tandem 10-base pair duplication (5'-GCTGAGTTTG-3') was found in exon 2 of the BLIMP1 gene in primary effusion B-cell lymphoma. We also found in diffuse large B-cell lymphoma a single base substitution in exon 6 (1747C-->T) that results in a somatic nonsense mutation (Q583X). These findings indicate that mutational analysis of the BLIMP1 gene may be useful for characterizing the molecular basis of B-cell lymphoma.
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Walker--Warburg syndrome (WWS), the most severe alpha-dystroglycanopathy, is characterized by brain and eye anomalies, and congenital muscular dystrophy (CMD). So far at least four genes (POMT1, POMT2, Fukutin, and FKRP gene) have been implicated in WWS, accounting for about 30% of all cases. We report a male patient with WWS resulting from a homozygous nonsense mutation (R514X) in the POMT1 gene. The patient had congenital hydrocephalus which was detected at 29 weeks of gestation. A brain MRI obtained after birth revealed type II lissencephaly, hydrocephalus, and pontocerebellar hypoplasia. The case also exhibited severe ocular malformations and muscular hypotonia due to CMD.