Laser therapy acne, skin disorders

British Journal of Dermatology 2000; 142: 973±978.

Phototherapy with blue (415 nm) and red (660 nm) light in the treatment of acne vulgaris

P.PAPAGEORGIOU, A.KATSAMBAS* AND A.CHU Unit of Dermatology, Imperial College of Science, Technology and Medicine, Hammersmith Hospital, DuCane Road, London W12 0NN, U.K. *Adreas Sygros Hospital, Athens, Greece Accepted for publication 7 December 1999

Summary In this study we have evaluated the use of blue light (peak at 415 nm) and a mixed blue and red light (peaks at 415 and 660 nm) in the treatment of acne vulgaris. One hundred and seven patients with mild to moderate acne vulgaris were randomized into four treatment groups: blue light, mixed blue and red light, cool white light and 5% benzoyl peroxide cream.

Subjects in the phototherapy groups used portable light sources and irradiation was carried out daily for 15 min. Comparative assessment between the three light sources was made in an observer-blinded fashion, but this could not be achieved for the use of benzoyl peroxide. Assessments were performed every 4 weeks. After 12 weeks of active treatment a mean improvement of 76% (95% confidence interval 66±87) in inflammatory lesions was achieved by the combined blue±red light phototherapy; this was significantly superior to that achieved by blue light (at weeks 4 and 8 but not week 12), benzoyl peroxide (at weeks 8 and 12) or white light (at each assessment).

The final mean improvement in comedones by using blue±red light was 58% (95% confidence interval 45±71), again better than that achieved by the other active treatments used, although the differences did not reach significant levels. We have found that phototherapy with mixed blue±red light, probably by combining antibacterial and anti-inflammatory action, is an effective means of treating acne vulgaris of mild to moderate severity, with no significant short-term adverse effects. Key words: acne, blue±red light, phototherapy

Low-Intensity Indocyanine-Green Laser Phototherapy Of Acne Vulgaris: Pilot Study.

Genina EA, Bashkatov AN, Simonenko GV, Odoevskaya OD, Tuchin VV, Altshuler GB.Saratov State University, Optics Department, Astrakhanskaya 83, Saratov 410026, Russia.

Near infrared (NIR) diode laser low-intensity (soft) phototherapy with the topical application of indocyanine green (ICG) has been suggested for treatment of acne vulgaris. Twelve volunteers with acne lesions on their faces and/or backs were enrolled in the experiment. Skin areas of the subjects that were 4x5 cm(2) were stained with ICG solution for 5 min before laser irradiation (803 nm) at a power density up to 50 mW/cm(2) for 5 to 10 min.

For 75% of the subjects, a single treatment was provided and for the other 25%, eight sequential treatments over a period of a month were carried out. Observations a month after the completion of the treatment showed that only the multiple treatments with a combination of ICG and NIR irradiation reduced inflammation and improved the state of the skin for a month without any side effects. A month after treatment, the improvement was about 80% for the group receiving multiple treatments. Single treatments did not have a prolonged effect.

Light Therapy In The Treatment Of Acne Vulgaris
Elman M, Lebzelter J.

Dermatology and Lasers Clinic, Tel Aviv Msq, Caesarea, Israel.

BACKGROUND: Over the past decade, lasers and light-based systems have become a common modality to treat a wide variety of skin-related conditions, including acne vulgaris. In spite of the various oral and topical treatments available for the treatment of acne, many patients fail to respond adequately or may develop side effects. Therefore, there is a growing demand by patients for a fast, safe, and side-effect-free novel therapy.

OBJECTIVES: To address the role of light therapy in the armamentarium of treatments for acne vulgaris, to discuss photobiology aspects and biomedical optics, to review current technologies of laser/light-based devices, to review the clinical experience and results, and to outline clinical guidelines and treatment considerations.

RESULTS: Clinical trials show that 85% of the patients demonstrate a significant quantitative reduction in at least 50% of the lesions after four biweekly treatments. In approximately 20% of the cases, acne eradication may reach 90%. At 3 months after the last treatment, clearance is approximately 70% to 80%. The nonrespondent rate is 15% to 20%.

CONCLUSIONS: Laser and light-based therapy is a safe and effective modality for the treatment of mild to moderate inflammatory acne vulgaris. Amelioration of acne by light therapy, although comparable to the effects of oral antibiotics, offers faster resolution and fewer side effects and leads to patient satisfaction.

Photomedicine and Laser Surgery Volume 27, Number 6, 2009 ª Mary Ann Liebert, Inc. Pp. 969–971 DOI: 10.1089=pho.2009.2547
Green Tea and Red Light— A Powerful Duo in Skin Rejuvenation
Andrei P. Sommer, Ph.D., and Dan Zhu, M.Sc.
Objective: Juvenile skin has been the subject of intense research efforts since ancient times. This article reports on synergistic complementarities in the biological actions of green tea and red light, which inspired the design of a green tea–assisted facial rejuvenation program.
Background Data: The approach is based on previous laboratory experiments providing insight into a mechanism by which visible light interacts with cells and their microenvironment. Methods: After 2 months of extreme oxidative stress, green tea–filled cotton pads were placed once per day for 20 minutes onto the skin before treatment with an array of light-emitting diodes (central wavelength 670 nm, dermal dose 4 J=cm2 ). Results: Rejuvenated skin, reduced wrinkle levels, and juvenile complexion, previously realized in 10 months of light treatment alone were realized in 1 month.
Conclusion: The accelerated skin rejuvenation based on the interplay of the physicochemical and biological effects of light with the reactive oxygen species scavenging capacity of green tea extends the action spectrum of phototherapy. The duo opens the gate to a multitude of possible biomedical light applications and cosmetic formulas