UTSUGISAWA Taiju
   Department   School of Medicine(Tokyo Women's Medical University Hospital), School of Medicine
   Position   Associate Professor
Article types Original article
Language English
Peer review Peer reviewed
Title Development of cellular models for ribosomal protein S19 (RPS19)-deficient diamond-blackfan anemia using inducible expression of siRNA against RPS19.
Journal Formal name：Molecular therapy : the journal of the American Society of Gene Therapy
Abbreviation：Mol Ther
ISSN code：15250016/15250016
Domestic / ForeginForegin
Volume, Issue, Page 11(4),pp.627-630
Author and coauthor Miyake Koichi, Flygare Johan, Kiefer Thomas, Utsugisawa Taiju, Richter Johan, Ma Zhi, Wiznerowicz Maciej, Trono Didier, Karlsson Stefan
Publication date 2005/04
Summary Diamond-Blackfan anemia (DBA) is a congenital red cell aplasia in which 25% of the patients have a mutation in the ribosomal protein S19 (RPS19) gene. No models exist for RPS19-deficient DBA and the molecular pathogenesis is unknown. To establish an in vitro inducible model for DBA, human erythroid leukemic cell lines, TF-1 and UT-7 cells, were cotransduced with a lentiviral vector expressing the green fluorescent protein (GFP) gene and small interfering RNA (siRNA) against RPS19 controlled by a tet operator regulatory element and another transactivator vector containing the red fluorescent protein (RFP) gene and the cDNA encoding a tetracycline-controllable transcriptional repressor. Following transduction, the RFP-positive and GFP-negative cell population was sorted by flow cytometry. Upon incubation with doxycycline (0.5 mug/ml), more than 98% of cells expressed GFP and the siRNA. Significant suppression of erythroid differentiation, cell growth, and colony formation was observed in cells treated with siRNA against RPS19 but not in cells treated with a control vector. These findings show that RPS19 plays an important role in the regulation of hematopoietic cell proliferation and erythroid differentiation. These novel cell lines represent models for RPS19-deficient DBA and can be used to identify the molecular mechanisms in RPS19-deficient DBA.
DOI 10.1016/j.ymthe.2004.12.001
PMID 15771965