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- W125570897 abstract "Paroxysmal nocturnal hemoglobinuria (PNH) is an acquired clonal defect of hematopoietic stem cells in which affected cells are characterized by the lack of glycosylphosphatidylinositol (GPI)-anchored proteins. The lesion in PNH lies in the defective synthesis of N-acetyl-D- glucosaminyl-phosphatidylinositol (GlcNAc-Pl), the first intermediate in GPI biosynthesis. Reintroduction of the PIG-A gene into GPI(-) patient cells reportedly complements this defect. We have analyzed here PIG-A transcripts of six PNH patients. GPI+ and GPI- cell lines from each individual were used, ie, Epstein-Barr virus-transformed B- lymphoblastoid cell lines, T-cell lines, and natural killer cell clones. Reverse transcriptase polymerase chain reaction and sequencing showed three different PIG-A splicing variants in GPI+ cell lines, in which the largest transcript contained the wild-type PIG-A coding region sequence. GPI-deficient cell lines showed abnormal splicing variants. Sequencing of PIG-A complementary DNA and genomic DNA showed heterogeneous mutations ranging from different point mutations to small deletions. Two lymphocyte cell lines (T- and B-cell lines) of one patient presented with the same mutation. For another patient, two different mutations were detected in one natural killer cell line. Therefore, different cell lineages have somatic mutations in PIG-A that lead to PNH." @default.
- W125570897 created "2016-06-24" @default.
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- W125570897 date "1995-03-15" @default.
- W125570897 modified "2023-09-28" @default.
- W125570897 title "Heterogeneous PIG-A mutations in different cell lineages in paroxysmal nocturnal hemoglobinuria" @default.
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- W125570897 doi "https://doi.org/10.1182/blood.v85.6.1640.bloodjournal8561640" @default.
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