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  • Debnath, Shubhranshu, et al. (författare)
  • Lentiviral Vectors with Cellular Promoters Correct Anemia and Lethal Bone Marrow Failure in a Mouse Model for Diamond-Blackfan Anemia
  • 2017
  • Ingår i: Molecular Therapy. - : Elsevier BV. - 1525-0016. ; 25:8, s. 1805-1814
  • Tidskriftsartikel (refereegranskat)abstract
    • Diamond-Blackfan anemia is a congenital erythroid hypoplasia and is associated with physical malformations and a predisposition to cancer. Twenty-five percent of patients with Diamond-Blackfan anemia have mutations in a gene encoding ribosomal protein S19 (RPS19). Through overexpression of RPS19 using a lentiviral vector with the spleen focus-forming virus promoter, we demonstrated that the Diamond-Blackfan anemia phenotype can be successfully treated in Rps19-deficient mice. In our present study, we assessed the efficacy of a clinically relevant promoter, the human elongation factor 1α short promoter, with or without the locus control region of the β-globin gene for treatment of RPS19-deficient Diamond-Blackfan anemia. The findings demonstrate that these vectors rescue the proliferation defect and improve erythroid development of transduced RPS19-deficient bone marrow cells. Remarkably, bone marrow failure and severe anemia in Rps19-deficient mice was cured with enforced expression of RPS19 driven by the elongation factor 1α short promoter. We also demonstrate that RPS19-deficient bone marrow cells can be transduced and these cells have the capacity to repopulate bone marrow in long-term reconstituted mice. Our results collectively demonstrate the feasibility to cure RPS19-deficient Diamond-Blackfan anemia using lentiviral vectors with cellular promoters that possess a reduced risk of insertional mutagenesis. Diamond-Blackfan anemia is a congenital erythroid hypoplasia. Twenty-five percent of patients have mutations in a gene encoding ribosomal protein S19. Using an RPS19-deficient mouse model, Debnath et al. demonstrate the feasibility to cure RPS19-deficient Diamond-Blackfan anemia by means of lentiviral vectors with cellular promoters that possess a reduced risk of insertional mutagenesis.
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