Aesthetic effects of topical photodynamic therapy

Kohl, Elisabeth; Torezan, Luís; Landthaler, Míchael; Szeimies, R.–M.

doi:10.1111/j.1468-3083.2010.03625.x

Cited by 49 publications

(25 citation statements)

References 35 publications

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“…PDT has been reported to exert an immunostimulatory effect [31], [35], [36] and to promote the accumulation of neutrophils, preventing infection [37],[38]. Clinically, topical ALA-PDT has been employed for the photorejuvenation of facial skin by stimulating cellular differentiation and proliferation [39]. Thus, it is possible that not only the direct antimicrobial effect of ALA-PDT, but also its influence on the immune system, was involved in the acceleration of wound healing in the present study.…”

Section: Discussionmentioning

confidence: 99%

Photodynamic Therapy Using Systemic Administration of 5-Aminolevulinic Acid and a 410-nm Wavelength Light-Emitting Diode for Methicillin-Resistant Staphylococcus aureus-Infected Ulcers in Mice

et al. 2014

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Bacterial resistance to antibiotics has become a worldwide problem. One potential alternative for bacterial control is photodynamic therapy. 5-aminolevulinic acid is a natural precursor of the photosensitizer protoporphyrin IX. Relatively little is known about the antibacterial efficacy of photodynamic therapy using the systemic administration of 5-aminolevulinic acid; a few reports have shown that 5-aminolevulinic acid exerts photodynamic effects on methicillin-resistant Staphylococcus aureus (MRSA) in vitro. In this study, we evaluated the effectiveness of photodynamic therapy using 5-aminolevulinic acid and a 410-nm wavelength light-emitting diode in vitro and in vivo for the treatment of MRSA. We found that 5-aminolevulinic acid photodynamic therapy with the light-emitting diode had an in-vitro bactericidal effect on MRSA. In vivo, protoporphyrin IX successfully accumulated in MRSA on ulcer surfaces after intraperitoneal administration of 5-aminolevulinic acid to mice. Furthermore, 5-aminolevulinic acid photodynamic therapy accelerated wound healing and decreased bacterial counts on ulcer surfaces; in contrast, vancomycin treatment did not accelerate wound healing. Our findings indicate that 5-aminolevulinic acid photodynamic therapy may be a new treatment option for MRSA-infected wounds.

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Section: Discussionmentioning

confidence: 99%

Photodynamic Therapy Using Systemic Administration of 5-Aminolevulinic Acid and a 410-nm Wavelength Light-Emitting Diode for Methicillin-Resistant Staphylococcus aureus-Infected Ulcers in Mice

et al. 2014

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“…Photodynamic therapy has been frequently reported to have a beneficial cosmetic effect on the treated skin [81]. This effect can be attributed to the removal of the AK lesions and irregular pigmentation, but also to additional dermal effects (see Table 2).…”

Section: Cosmetic Outcomementioning

confidence: 99%

A review of BF-200 ALA for the photodynamic treatment of mild-to-moderate actinic keratosis

Reinhold¹

2017

Future Oncol.

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BF-200 ALA is a combination of a nanoscale-lipid vesicle formulation and the prodrug 5-aminolevulinic acid (5-ALA). The nanoemulsion stabilizes the prodrug and enhances its penetration through the stratum corneum. It has shown excellent therapeutic results in both lesion and field-directed photodynamic therapy of actinic keratosis (AK). AK is an early form of epidermal neoplasia and a precursor of invasive cutaneous squamous cell carcinoma. It is characterized by the combination of visible neoplastic lesions and surrounding tissue also harboring tumorigenic UV-induced mutations: a concept called field cancerization. A selective, field-directed treatment is ideal to meet the requirements of field change. Here, we review the clinical data on BF-200 ALA for AK along with a summary of molecular mechanisms and future perspectives. Actinic keratosis (AK), also known as solar keratosis, is caused by chronic exposure to sunlight or other ultraviolet light sources [1,2] and may progress to invasive squamous cell carcinoma (SCC) [3]. It is the most common lesion with malignant potential to arise on the skin. AK is mostly seen in Caucasians in skin areas that have extensive sun exposure throughout their lives [4]. Epidemiological data show a high occurrence rate of AK. Regions with higher ultraviolet exposure have a higher prevalence of AK. For the USA, the prevalence was estimated to range from 11 to 26%, while in Australia it ranged from 40 to 60%. In Europe, a prevalence of 15% in men and 6% in women has been documented [5]. Over the age of 70 years, 34% of men and 18% of women were found to have actinic keratotic lesions [6]. Next to fair skin type, an advanced age and lifelong sun exposure immunosuppression/-deficiency plays another important risk factor [5].Mostly, AK develops slowly and early in the disease process, they may disappear only to reappear later. Recurrence of the disease may include partial elimination of the initial lesion, subclinical lesion progression to visible status, or development of new lesions [7]. On top of this, an AK may progress to invasive SCC, the second-most common form of skin cancer [8,9]. The actual percentage of progress to invasive SCC remains unknown, and estimates vary from 5 to 20% within 10 to 25 years with reported annual transformation rates varying greatly from as low as 0.25% to as high as 16% [10]. The regression rate for a single untreated lesion is 15 to 63% after a year; recurrence rates range from 15 to 53% [11]. In general patients develop multiple AKs in one area and predicting which course each individual lesion will follow is impossible. Nonetheless, AK lesions are reliable markers for patients who are most predisposed to developing invasive SCC [4,[12][13].AK lesions typically appear in areas most frequently exposed to the sun such as the face, back of the hands, or bald scalp; 75% of lesions are found on the head, neck and forearms [14]. The lesions vary in appearance as well as size and can include erythematous scaly macules, rough pigmented patches and hyperker...

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“…This process includes alterations in texture, coloration, pigmentation disturbances, superficial and deep wrinkles, erythema, telangiectasias, and QAs. 15 These modifications are present in the extrinsic skin aging process or photoaging and form the clinical basis of the cutaneous field cancerization (Figure 1). QAs are, probably, the only macroscopic alterations on a field.…”

Section: Clinical and Histopathological Con-sequencesmentioning

confidence: 99%

Cutaneous field cancerization: clinical, histopathological and therapeutic aspects

Torezan

Festa-Neto

2013

An. Bras. Dermatol.

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The concept of "field cancerization" was first introduced by Slaughter in 1953 when studying the presence of histologically abnormal tissue surrounding oral squamous cell carcinoma. It was proposed to explain the development of multiple primary tumors and locally recurrent cancer. Organ systems in which field cancerization has been described since then are: head and neck (oral cavity, oropharynx, and larynx), lung, vulva, esophagus, cervix, breast, skin, colon, and bladder. Recent molecular studies support the carcinogenesis model in which the development of a field with genetically altered cells plays a central role. An important clinical implication is that fields often remain after the surgery for the primary tumor and may lead to new cancers, designated presently as "a second primary tumor" or "local recurrence," depending on the exact site and time interval. In conclusion, the development of an expanding pre-neoplastic field appears to be a critical step in epithelial carcinogenesis with important clinical consequences. Diagnosis and treatment of epithelial cancers should not only be focused on the tumor but also on the field from which it developed. The most important etiopathogenetic, clinical, histopathological and therapeutic aspects of field cancerization are reviewed in this article.

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Aesthetic effects of topical photodynamic therapy

Cited by 49 publications

References 35 publications

Photodynamic Therapy Using Systemic Administration of 5-Aminolevulinic Acid and a 410-nm Wavelength Light-Emitting Diode for Methicillin-Resistant Staphylococcus aureus-Infected Ulcers in Mice

Photodynamic Therapy Using Systemic Administration of 5-Aminolevulinic Acid and a 410-nm Wavelength Light-Emitting Diode for Methicillin-Resistant Staphylococcus aureus-Infected Ulcers in Mice

A review of BF-200 ALA for the photodynamic treatment of mild-to-moderate actinic keratosis

Cutaneous field cancerization: clinical, histopathological and therapeutic aspects

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