Recombinant Adeno-associated Virus (rAAV)-mediated Expression of a Human Gamma-globin Gene in Human Progenitor-derived Erythroid Cells
Overview
Affiliations
Effective gene therapy for the severe hemoglobin (Hb) disorders, sickle-cell anemia and thalassemia, will require an efficient method to transfer, integrate, and express a globin gene in primary erythroid cells. To evaluate recombinant adeno-associated virus (rAAV) for this purpose, we constructed a rAAV vector encoding a human gamma-globin gene (pJM24/vHS432A gamma). Its 4725-nucleotide genome consists of two 180-bp AAV inverted terminal repeats flanking the core elements of hypersensitive sites 2, 3, and 4 from the locus control region of the beta-globin gene cluster, linked to a mutationally marked A gamma-globin gene (A gamma) containing native promoter and RNA processing signals. CD34+ human hematopoietic cells were exposed to rAAV particles at a multiplicity of infection of 500-1000 and cultured in semisolid medium containing several cytokines. A reverse transcriptase polymerase chain reaction assay distinguished mRNA signals derived from transduced and endogenous human gamma-globin genes. Twenty to 40% of human erythroid burst-forming unit-derived colonies expressed the rAAV-transduced A gamma-globin gene at levels 4-71% that of the endogenous gamma-globin genes. The HbF content of pooled control colonies was 26%, whereas HbF was 40% of the total in pooled colonies derived from rAAV transduced progenitors. These data establish that rAAV containing elements from the locus control region linked to a gamma-globin gene are capable of transferring and expressing that gene in primary human hematopoietic cells resulting in a substantial increase in HbF content.
Tissue and cell-type-specific transduction using rAAV vectors in lung diseases.
Kochergin-Nikitsky K, Belova L, Lavrov A, Smirnikhina S J Mol Med (Berl). 2021; 99(8):1057-1071.
PMID: 34021360 DOI: 10.1007/s00109-021-02086-y.
Adeno-Associated Virus Vectors and Stem Cells: Friends or Foes?.
Brown N, Song L, Kollu N, Hirsch M Hum Gene Ther. 2017; 28(6):450-463.
PMID: 28490211 PMC: 5488260. DOI: 10.1089/hum.2017.038.
Adeno-associated Virus as a Mammalian DNA Vector.
Salganik M, Hirsch M, Samulski R Microbiol Spectr. 2015; 3(4).
PMID: 26350320 PMC: 4677393. DOI: 10.1128/microbiolspec.MDNA3-0052-2014.
Zhu J, Kren B, Park C, Bilgim R, Wong P, Steer C Biochemistry. 2007; 46(23):6844-58.
PMID: 17508724 PMC: 3893920. DOI: 10.1021/bi6024484.
Adeno-associated virus vectors and hematology.
Russell D, Kay M Blood. 1999; 94(3):864-74.
PMID: 10419876 PMC: 3739711.