TABLE 2.
Infectivity of SNV-derived vector particles displaying anti-CD34 scAs on various human cell lines
Source of vector particlesa | Virus titer (CFU/ml)
|
|||
---|---|---|---|---|
KG1a | Daudi | HeLa | D17 | |
DSH-cxl | <10 | <10 | <10 | 2 × 106 |
DSgp13-cxl-RD160 | 3 × 103 | 2 × 103 | 3 × 102 | <10 |
DSH-cxl-RD160 | 2 × 105 | 2 × 105 | 104 | 106 |
DSgp13-cxl-MLV-Env | 2 × 102 | 5 × 102 | 105 | 105 |
All particles transduce a retroviral vector for expression of the bacterial β-galactosidase gene. DSH-cxl virus particles contain the wild-type SNV envelope; DSgp13-cxl-RD160 particles display chimeric anti-CD34 scA–SNV-Env fusion proteins; DSH-cxl-RD160 particles are similar to DSgp13-cxl-RD160 but also contain the SNV wild-type Env. DSgp13-cxl-MLV-Env particles contain SNV Gag-Pol proteins pseudotyped with ampho-MLV Env.