Table 2.

Summary of AAV-cFVIII—treated hemophilia A dog results


Dog

Weight, kg

Dose, vg/kg

Ave WBCT, s

Ave Coatest mU/mL, (%)

Ave one-stage mU/mL, (%)

CBT (timepoint, min)

Inhibitory antibody
Elisa   10   6 × 1012  318 ± 38   179 ± 31 (2.6)   124 ± 67 (1.8)   3-4 (week 16)   —  
Junior   12.8   2.7 × 1013  314 ± 60   196 ± 52 (2.8)   176 ± 53 (2.5)   4-5 (week 35)   + (weeks 2-9)  
Normal   NA   NA   180-300   7000 (100)   7000 (100)   <5   NA  
Hem A
 
NA
 
NA
 
>960
 
<22.5 (0.3)
 
<44 (0.6)
 
>11
 
NA
 

Dog

Weight, kg

Dose, vg/kg

Ave WBCT, s

Ave Coatest mU/mL, (%)

Ave one-stage mU/mL, (%)

CBT (timepoint, min)

Inhibitory antibody
Elisa   10   6 × 1012  318 ± 38   179 ± 31 (2.6)   124 ± 67 (1.8)   3-4 (week 16)   —  
Junior   12.8   2.7 × 1013  314 ± 60   196 ± 52 (2.8)   176 ± 53 (2.5)   4-5 (week 35)   + (weeks 2-9)  
Normal   NA   NA   180-300   7000 (100)   7000 (100)   <5   NA  
Hem A
 
NA
 
NA
 
>960
 
<22.5 (0.3)
 
<44 (0.6)
 
>11
 
NA
 

The Coatest and the one-stage assay are sensitive to 22.5 and 44 mU/mL, respectively. The WBCT, Coatest, and one-stage assay results were averaged over 14 months for Elisa and 7.5 months for Junior. The CBT was performed at a single time point for each injected dog.

A FVIII inhibitory antibody was detected by Bethesda assay in Junior between weeks 2 and 9.

NA indicates not applicable; WBCT, whole-blood clotting time; and CBT, cuticle bleeding time.

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