Daniel Winn, Andrea Gilreath, David Pajuelo, Justyna M Meissner, Jose L Mullor
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Evaluation of the In Vivo Skin Penetration of TXVector by Confocal Raman Spectroscopy.
Background: Tranexamic acid (TXA) is a promising active to treat hyperpigmentation disorders, such as melasma and acne scars. However, TXA is highly hydrophilic and its penetration into the skin is poor and formulation dependent.
Aims: In this study, our aim was to evaluate the in vivo skin penetration of an ester-modified TXA, TXVector, directly on the skin of volunteers.
Methods: For the analysis of in vivo skin penetration of TXVector, we used in vivo confocal Raman spectroscopy (CRS). The use of CRS on live skin allows us to study directly how a compound affects skin composition at different depths and how this compound penetrates into the skin in real time.
Results: Our results showed that the TXA absorption into the skin via TXVector was 2.1-fold and 3.8-fold higher compared to free TXA 3% and TXA 1% formulations, respectively. Most importantly, upon application of TXVector, the TXA penetration flux into the skin was 107% and 280% higher than that of the free TXA 3% and TXA 1% formulations, respectively.
Conclusions: In summary, this study shows that the esterification-based TXVector formulation enhances the penetration flux of TXA and increases its bioavailability in the skin.
期刊介绍：
The Journal of Cosmetic Dermatology publishes high quality, peer-reviewed articles on all aspects of cosmetic dermatology with the aim to foster the highest standards of patient care in cosmetic dermatology. Published quarterly, the Journal of Cosmetic Dermatology facilitates continuing professional development and provides a forum for the exchange of scientific research and innovative techniques.
The scope of coverage includes, but will not be limited to: healthy skin; skin maintenance; ageing skin; photodamage and photoprotection; rejuvenation; biochemistry, endocrinology and neuroimmunology of healthy skin; imaging; skin measurement; quality of life; skin types; sensitive skin; rosacea and acne; sebum; sweat; fat; phlebology; hair conservation, restoration and removal; nails and nail surgery; pigment; psychological and medicolegal issues; retinoids; cosmetic chemistry; dermopharmacy; cosmeceuticals; toiletries; striae; cellulite; cosmetic dermatological surgery; blepharoplasty; liposuction; surgical complications; botulinum; fillers, peels and dermabrasion; local and tumescent anaesthesia; electrosurgery; lasers, including laser physics, laser research and safety, vascular lasers, pigment lasers, hair removal lasers, tattoo removal lasers, resurfacing lasers, dermal remodelling lasers and laser complications.
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