Expression of human Wiskott-Aldrich syndrome protein in patients' cells leads to partial correction of a phenotypic abnormality of cell surface glycoproteins

• Published in: Gene therapy Vol. 7; no. 4; pp. 314 - 320
• Main Authors: HUANG, M.-M, TSUBOI, S, WONG, A, YU, X.-J, OH-EDA, M, DERRY, J. M, FRANCKE, U, FUKUDA, M, WEINBERG, K. I, KOHN, D. B
• Format: Journal Article
• Language: English
• Published: Basingstoke Nature Publishing Group 01-02-2000
• Subjects: AIDS/HIV; Biological and medical sciences; Biotechnology; Bone marrow; Cell surface; Cells, Cultured; Eczema; Epstein-Barr virus; Fundamental and applied biological sciences. Psychology; Gene therapy; Gene Transfer Techniques; Genetic Vectors - genetics; Glycoproteins; Glycosylation; Glycosyltransferase; Health. Pharmaceutical industry; Hematopoietic Stem Cells - physiology; Humans; Immunodeficiency; Industrial applications and implications. Economical aspects; Leukemia Virus, Murine - genetics; Lymphoblastoid cell lines; Membrane Glycoproteins - genetics; Molecular modelling; murine leukemia virus; N-Acetylglucosinyldiphosphodolichol N-acetylglucosaminyltransferase; Packaging; Phenotype; Proteins; Proteins - genetics; Thrombocytopenia; Wiskott-Aldrich Syndrome - genetics; Wiskott-Aldrich Syndrome Protein; Human; Immunopathology; Skin disease; Enzyme; Transferases; Glycoprotein; Glycosyltransferases; Retroviridae; Hemopathy; Glycosylation; Gene expression; Immune deficiency; Cell surface; Genetic disease; Virus; Platelet; Cell line; Enzymatic activity; Wiskott Aldrich syndrome; Gene therapy; Lymphoblastoid cell; Vector
• ISSN: 0969-7128; 1476-5462
• DOI: 10.1038/sj.gt.3301085

The Wiskott-Aldrich syndrome (WAS) is an uncommon X-linked recessive disease characterized by thrombocytopenia, eczema and immunodeficiency. The biochemical defect of this disorder primarily affects cells derived from bone marrow. To understand better the molecular mechanisms underlying this disease and to evaluate the possibility of correcting the genetic defects in hematopoietic cells, a Moloney murine leukemia virus (MoMLV)- based retroviral vector carrying a functional Wiskott-Aldrich syndrome protein (WASp) cDNA driven by an SV40 promoter (LNS-WASp) was constructed. A packaging cell line containing this vector produced a stable level of WAS protein and maintained a high titer of viral output. Epstein-Barr virus (EBV)-transformed B lymphoblastoid cell lines (B-LCL) from WAS patients, which lack expression of the WAS protein, were transduced by the LNS-WASp retroviral vector and showed expression of WASp by Western blot. Analysis of the O-glycan pattern on cell surface glycoproteins from WAS patients' B-LCL showed an altered glycosylation pattern, due to increased activity of beta-1, 6-N-acetylglucosaminyltransferase (C2GnT). Transduction by the retroviral vector carrying the functional WASp cDNA partially restored the abnormal glycosylation pattern, and was accompanied by a decreasing C2GnT activity. These findings imply a functional linkage between the WAS protein and the expression of the glycosyltransferase involved in the O-glycosylation, and also suggest a potential gene therapy via transferring a functional WASp cDNA into hematopoietic cells for Wiskott-Aldrich syndrome. Gene Therapy (2000) 7, 314-320.