Gene therapy was performed on adult squirrel monkeys (Saimiri
sciureus) that were missing the L-opsin gene. In this species, some
females have trichromatic colour vision whereas males are red–green
colour blind2
. Serotype 2/5 recombinant adeno-associated virus
(rAAV) containing a human L-opsin gene under the control of the
L/M-opsin enhancer and promoter (Fig. 1a) was delivered to the
photoreceptor layer by subretinal injections (see Methods).
Transcriptional regulatory elements were chosen to direct expression
preferentially in M cones, but not short- (S) wavelength-sensitive
cones or rods3
. To provide the receptoral basis for trichromacy,
animals received three 100-ml injections (containing a total of
2.7 3 1013 viral particles) in each eye, which produced a relatively
uniform, third submosaic of approximately 15–36% of M cones that
coexpressed the transgene (Fig. 1e, f)
Gene therapy was performed on adult squirrel monkeys (Saimiri
sciureus) that were missing the L-opsin gene. In this species, some
females have trichromatic colour vision whereas males are red–green
colour blind2
. Serotype 2/5 recombinant adeno-associated virus
(rAAV) containing a human L-opsin gene under the control of the
L/M-opsin enhancer and promoter (Fig. 1a) was delivered to the
photoreceptor layer by subretinal injections (see Methods).
Transcriptional regulatory elements were chosen to direct expression
preferentially in M cones, but not short- (S) wavelength-sensitive
cones or rods3
. To provide the receptoral basis for trichromacy,
animals received three 100-ml injections (containing a total of
2.7 3 1013 viral particles) in each eye, which produced a relatively
uniform, third submosaic of approximately 15–36% of M cones that
coexpressed the transgene (Fig. 1e, f)
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