Fig. 15 shows the visible change in the dermis density by following
the 3 month treatment course which was confirmed by
ultrasound. The increase in dermal density implies an increase in
the amount of collagen. After the 3 month treatment course solar
scars were treated and are not apparent in the ultrasound image.
The activation of transcription factor AP-1, through production of
collagenases, could remodel the damaged collagen, resulting in
the clinical improvement of solar scars