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Chūō-ku, Japan

Miura T.,Osaka University | Takada A.,Osaka University | Ooe M.,Osaka University | Ooe M.,Tokiwa Pharmaceutical Co.
Aesthetic Plastic Surgery | Year: 2012

Background Topical tretinoin [all-trans-retinoic acid (RA)] currently is widely used to treat photoaged skin. However, undesirable side effects such as erythema, irritation, and scaling are unavoidable and limit the use of tretinoin. To address these issues, the authors developed the tretinoin cyclodextrin complex (RA/CyD), which is tretinoin encapsulated by cyclodextrin. Cyclodextrins are cyclic oligosaccharides commonly used in food additives and fabric fresheners. This study aimed to evaluate the antiwrinkle effect of RA/CyD and alleviation of the side effects compared with RA treatment alone. Methods In this study, 12 photoaged patients completed an 8 week study using RA and RA/CyD in a double-blind manner. Before and after the treatment, the patients' evaluations, wrinkle scores, skin elasticity, and wrinkle area measurement using skin replica were evaluated. Three men were recruited for histologic analysis. Results The patients reported that undesirable irritant reactions were more moderate with RA/CyD than with RA. In the assessment of wrinkle scores, skin elasticity, and wrinkle area measurement, RA/CyD demonstrated an antiwrinkle effect statistically equal to that of RA. In histology, both RA/CyD and RA demonstrated epidermal hyperplasia. In immunohistochemistry, inflammation induced by RA/ CyD was more moderate than that induced by RA. Conclusion The findings show that RA and RA/CyD result in the equivalent clinical improvement for patients with photoaging. The use of RA/CyD overcomes the drawbacks of RA while possessing equal effect. It is expected that CyD will broaden tretinoin treatment. Level of Evidence III This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors at www.springer.com/00266. © Springer Science+Business Media, LLC and International Society of Aesthetic Plastic Surgery 2012. Source


Takahashi K.,Tokyo Polytechnic University | Morimoto S.,Tokyo Polytechnic University | Nakamura H.,Tokyo Polytechnic University | Narusawa T.,Tokyo Polytechnic University | And 6 more authors.
Journal of Inclusion Phenomena and Macrocyclic Chemistry | Year: 2011

2-Hydroxypropyl-β-cyclodextrin (HP-β-CyD) includes all-trans retinoic acid (RA), covering the double-bond area of RA with substituted hydroxypropyl groups on CyD ring, as proved by the nuclear Overhauser effect (NOE) between methylene protons on the hydroxypropyl groups and the proton on RA. The formation of an inclusion complex results in hydrophilicity and stability. The effect of RA/HP-β-CyD and that of RA without HP-β-CyD on wrinkle scores and skin elasticity during skin treatment were identical, and the cutaneous stimulus was reduced comparing with RA. The results indicated that the RA/HP-β-CyD complex should help to realize new approaches in skin rejuvenation therapy. © 2010 Springer Science+Business Media B.V. Source


Munehiro A.,Kagawa University | Murakami Y.,Tokiwa Pharmaceutical Co. | Shirahige Y.,Kagawa University | Nakai K.,Kagawa University | And 4 more authors.
Journal of Dermatological Treatment | Year: 2012

Cosmetic moisturisers were applied to one side of the face of 18 male Japanese patients with acne vulgaris who were treated with a topical administration of adapalene and clindamycin phosphate gels. We assessed the alleviating effect of the moisturisers on the side effects of the treatment. The severity of acne and the number of inflammatory and non-inflammatory lesions were measured at 0, 2, and 4 weeks. The water content in the stratum corneum and transepidermal water loss were measured by comparing the moisturiser-treated and untreated sides of the face. The sensation of skin dryness and irritation on both sides of the face were assessed by the subjects. We observed that the use of moisturisers did not impact the efficacy of the standard topical treatment and they significantly improved the water content in the stratum corneum and the sensation of dryness. These results suggested that the use of moisturisers in combination with the standard topical treatment may improve adherence to therapy by alleviating the sensation of dryness. © 2012 Informa Healthcare USA on behalf of Informa UK Ltd. Source


Kubota Y.,Kagawa University | Munehiro A.,Kagawa University | Shirahige Y.,Kagawa University | Nakai K.,Kagawa University | And 5 more authors.
Journal of Dermatological Treatment | Year: 2012

The efficacy of combined therapy with a retinoid and antibiotic for Japanese patients with acne vulgaris remains to be established. Further, maintenance strategies limiting the use of topical retinoids must be identified. The objectives of this study are to determine the efficacy of sequential application of topical adapalene and clindamycin phosphate and to assess the impact of this regimen on patients' quality of life. Sixty-six patients were recruited. The regimen comprised two phases. For the 4-week initial treatment, 1% clindamycin phosphate gel was applied twice daily and 0.1% adapalene gel, once. In the 4-week maintenance phase, patients were randomly assigned to the OD group (adapalene applied once daily) or the TW group (adapalene applied once daily on 2 days per week). The acne severity score, lesion counts, microcomedone count, and sebum amount were measured. Quality of life (QOL) was assessed using Skindex-16. All parameters improved significantly by week 4 of initial treatment. No statistically significant differences were found in the improvement of clinical findings between the groups. All QOL scores improved significantly and did not significantly differ between the groups. Our regimen may enable clinical control of acne in Japanese patients and improve their QOL. For limiting retinoid use, weekly application of adapalene during maintenance is suitable. © 2012 Informa Healthcare USA on behalf of Informa UK Ltd. Source


Morita E.,The University of Shimane | Takahashi H.,The University of Shimane | Niihara H.,The University of Shimane | Dekio I.,The University of Shimane | And 3 more authors.
Allergy: European Journal of Allergy and Clinical Immunology | Year: 2010

Background: Management of atopic dermatitis (AD) requires judging the symptoms of local skin lesions and prescribing a suitable treatment. However, no method has been established in which objective measures can be used to evaluate the severity of local symptoms. We established a method for measuring thymus and activation-regulated chemokine (TARC) levels in the stratum corneum (scTARC), and examined whether the scTARC can be used as an indicator of the severity of local skin lesions in patients with AD. Methods: Stratum corneum was obtained from patients with AD by tape-stripping, and scTARC was evaluated using a TARC-specific antibody followed by image analysis. The scTARC was examined to determine correlation with the severity of local skin lesions (the severity of erythema, edema/papule, oozing/crusts, excoriations, lichenification, and xerosis) as well as with the severity scoring of atopic dermatitis (SCORAD) index, serum TARC level, serum IgE level, serum lactate dehydrogenase (LDH) level, interleukin (IL)-4-producing T cell ratio (Th2 cell ratio), and blood eosinophil count. Results: The scTARC was correlated with the severity of local skin lesions, especially with the erythema, edema/papule, and oozing/crusts score. The scTARC in the most severe lesions was also correlated with the SCORAD index, serum TARC level, serum IgE level, and blood eosinophil count. The scTARC was not, however, correlated with the serum LDH level and Th2 cell ratio. Conclusion: An immunofluorescent technique combined with tape-stripping was used to measure scTARC. The scTARC can be used as an indicator of the severity of local acute inflammation in patients with AD. © 2010 John Wiley & Sons A/S. Source

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