A Double-Blind, 12-Week Study to Evaluate the Antiaging Efficacy of a Cream Containing the NF kappa B Inhibitor 4-Hexyl-1, 3-Phenylenediol and Ascorbic Acid-2 Glucoside in Adult Females

摘要

The 5 main physical manifestations of aged skin are wrinkles, uneven tone, brown spots, loss of elasticity, and dryness. One mechanism resulting in these physical manifestations is increased activity of the nuclear factor kappa B (NF kappa B) protein. This 12-week, doubleblind, placebo-controlled, randomized split-face study compared the antiaging effect and safety of a face cream containing 4-Hexyl-1, 3-phenylenediol, an NF kappa B inhibitor, and ascorbic acid-2 glucoside versus placebo in adult females aged 45-70 years old. Subjects (n=42) applied active treatment or placebo to the same half face twice daily at home for 12 weeks. Clinical evaluation was carried out by a dermatologist. Subjects carried out similar self-grading assessments. Colorimetric measurements analyzed skin color, and biomechanical skin properties were evaluated. Clinical grading showed that most wrinkle parameters were significantly improved after 8 weeks of active treatment compared with baseline and placebo (P <=.05), with improvements maintained after 12 weeks. Only Marionette wrinkles did not show a significant improvement. Brown spots (color intensityumber), overall photodamage, and most complexion parameters improved significantly after 8 and 12 weeks compared with baseline and placebo (P <=.05). Self-grading yielded similar results compared with baseline. Self-grading did not demonstrate improvements with active treatment versus placebo, except for skin firmness at 8 and 12 weeks (P.05). A significant difference was seen with active treatment compared with placebo in all colorimetric parameters (L*, b*, and ITA) after 8 weeks, and in spot coloration (b*) after 12 weeks (P<.05). Improvements in skin elasticity were not significantly different between treatments. Overall tolerability of active treatment was judged as good. In conclusion, a cream containing 4-Hexyl-1, 3-phenylenediol and ascorbic acid-2 glucoside improves the clinical appearance of aged skin, validating the potential use of NF kappa B inhibition as a novel, effective method of topical antiaging.