Treatment of erlotinib-induced acneiform eruption with chromophore gel-assisted phototherapy

5-aminolevulinic acid-mediated photodynamic therapy (ALA-PDT) for acneform rash induced by erlotinib: A case report

Erlotinib is an anticancer drug approved for the treatment of non-small cell lung cancer. It inhibits growth and proliferation of tumor cells by targeting epidermal growth factor receptor (EGFR). Dermatological toxicities are common side effects associated with EGFR inhibition. Here we describe a patient with acneform rash following oral medication of erlotinib, presented as facial erythema, papules and pustules. Two sessions of 5-aminolevulinic acid induced photodynamic therapy (ALA-PDT) with a 2-week interval were performed. No significant side effects or scarring were observed. The patient showed no recurrence within 6 months. Thus, we conclude that ALA-PDT is an effective treatment for skin lesions induced by erlotinib, especially for patients with need to sustain medication.

Fluorescent light energy modulates healing in skin grafted mouse model

Skin grafting is often the only treatment for skin trauma when large areas of tissue are affected. This surgical intervention damages the deeper dermal layers of the skin with implications for wound healing and a risk of scar development. Photobiomodulation (PBM) therapy modulates biological processes in different tissues, with a positive effect on many cell types and pathways essential for wound healing. This study investigated the effect of fluorescent light energy (FLE) therapy, a novel type of PBM, on healing after skin grafting in a dermal fibrotic mouse model. Split-thickness human skin grafts were transplanted onto full-thickness excisional wounds on nude mice. Treated wounds were monitored, and excised xenografts were examined to assess healing and pathophysiological processes essential for developing chronic wounds or scarring. Results demonstrated that FLE treatment initially accelerated re-epithelialization and rete ridge formation, while later reduced neovascularization, collagen deposition, myofibroblast and mast cell accumulation, and connective tissue growth factor expression. While there was no visible difference in gross morphology, we found that FLE treatment promoted a balanced collagen remodeling. Collectively, these findings suggest that FLE has a conceivable effect at balancing healing after skin grafting, which reduces the risk of infections, chronic wound development, and fibrotic scarring.

Biophotonic Therapy with Fluorescent Light Energy Decreases Facial Erythema, Improves Signs and Symptoms of Rosacea, and Increases Patient Satisfaction: A Postmarket Study

BACKGROUND

Rosacea is a difficult-to-manage chronic inflammatory skin condition reported to have a negative psychosocial impact on patients. Novel approaches are sought to target the many signs and symptoms of the condition while also improving the quality of life of patients.

OBJECTIVE

We assessed the efficacy of the Kleresca^® biophotonic platform (KLOX Technologies Inc., Laval, Canada), which creates fluorescent light energy (FLE), to induce a novel form of photobiomodulation for treating rosacea. We also assessed patient satisfaction with their facial appearance and concerns about perceptions of others before and after treatment.

METHODS

Nine patients were treated once a week for four weeks with FLE. Patients and the treating clinician completed questionnaires throughout and after the treatment to grade the rosacea signs and symptoms and capture patients' perceptions of the treatment and their condition.

RESULTS

FLE significantly reduced the inflammatory erythematous reaction of the face, improved flushing and erythema associated with rosacea, and had a positive impact on patients' self-perception and emotional wellbeing.

CONCLUSION

Our results support FLE as an effective, noninvasive treatment modality for rosacea.

Evaluation of Fluorescent Light Energy for the Treatment of Acute Second-degree Burns

INTRODUCTION

The use of photobiomodulation has been proposed to improve wound healing for the last two decades. Recent development in photobiomodulation has led to the development of a novel biophotonic platform that utilizes fluorescent light energy (FLE) within the visible spectrum of light for healing of skin inflammation and wounds.

MATERIALS AND METHODS

In this article, FLE was used in preliminary analysis on 18 case studies of acute second-degree burns and in a pilot study using an ex vivo human skin model. Efficacy of FLE on wound healing and tissue remodeling was evaluated by monitoring improvements in the treated tissues, assessing pain for the patients, and by performing human genome microarray analysis of FLE-treated human skin samples.

RESULTS

Healing was reported for all 18 patients treated with FLE for acute second-degree burns without reported adverse effects or development of infections. Furthermore, preliminary ex vivo skin model data suggest that FLE impacts different cellular pathways including essential immune-modulatory mechanisms.

CONCLUSIONS

The results presented in this article are encouraging and suggest that FLE balances different stages of wound healing, which opens the door to initiating randomized controlled clinical trials for establishing the efficacy of FLE treatment in different phases of wound healing of second-degree burns.

Fluorescent light energy combined with systemic isotretinoin: A 52-week follow-up evaluating efficacy and safety in treatment of moderate-severe acne

Fluorescent light energy therapy combined with low-dose isotretinoin or tetracycline show remarkable clinical effect on 12 cases of moderate-to-severe acne. Treatment was considered safe, well-tolerated, and highly efficacious.

Effective removal of solar lentigines by combination of pre- And post-fluorescent light energy treatment with picosecond laser treatment

We present a novel treatment for removal of SL that is efficient and enables removal or lesions not immediately visible. Kleresca® FLE technology combined with picosecond laser treatment removes SL lesions and improves skin quality and appearance.

Management of otitis externa with an led-illuminated gel: a randomized controlled clinical trial in dogs

BACKGROUND

Canine otitis externa is a painful condition which can be challenging to treat due to difficulties in the administration of otic medication. This can be due to lack of owner compliance in the application of ear drops or due to the resentment that some dogs demonstrate when attempts are made to administer topical medication into a sensitive ear canal. The aim of the study was to assess the efficacy of a topical LED-illuminated gel (LIG) in canine otitis externa in comparison to standard of care therapy. Dogs with spontaneous otitis externa were randomly allocated in three groups: groups QW received LIG once weekly; BW received LIG twice weekly; group C received enrofloxacin and silver sulfadiazine twice daily. LIG consists of a topical application of a gel containing chromophores that, when illuminated by a LED lamp, re-emit fluorescent light which can stimulate physiological responses, promoting healing and controlling bacteria. The evaluation protocol (T0 to T5) considered clinical assessment (OTIS-3-index-scoring-system; pruritus-severity-scale; pain-severity-score; aural temperature), cytological scoring system, quali-quantitative bacteriologic assessment.

RESULTS

All groups (QW, n = 21; BW, n = 23; C, n = 20) showed improvement during the study (QW: P < 0.02 for cytological and pain scores, P < 0.003 for bacteriologic assessment, P < 10- 4 for pruritus, total OTIS-3 and temperature assessments; BW: P < 10- 4 for all clinical, cytological and bacteriologic assessments; C: P < 0.02 for all clinical and cytological assessments, P < 10- 4 for bacteriologic assessment). The highest clinical score reduction occurred in Group BW (P < 0.014 in T3; P < 0.001 in T4 and P < 10- 4 in T5). BW reached the clinically relevant effect level at T3 (- 3.26 ± 1.21 levels), QW reached it at T4 (- 3.24 ± 0.99), C did not reach it. No differences between groups were seen in the reduction of CFU/mL (T0-T5).

CONCLUSIONS

All treatment groups showed a positive clinical effect. LIG administered twice-a-week was the most favourable protocol of the study. LIG may be considered beneficial in the management of canine otitis externa; it seems to be effective in controlling the clinical condition, including the signs of inflammation and local pain, the bacterial growth, and it may help increasing treatment compliance.

Fluorescent light energy: A new therapeutic approach to effectively treating acne conglobata and hidradenitis suppurativa

The Kleresca® biophotonic platform utilizing fluorescent light energy (FLE) effectively treated both acne conglobata and hidradenitis suppurativa. FLE decreased the presence of inflammatory nodules, cysts, and associated erythema. It also supported a healing response to improve skin texture. FLE offers a new treatment approach to recalcitrant inflammatory skin conditions.

FLUORESCENT LIGHT ENERGY: The Future for Treating Inflammatory Skin Conditions?

Background: We have previously reported clinical efficacy with a novel form of photobiomodulation-a biophotonic platform inducing fluorescent light energy (FLE)-in both disease-affected and healthy skin; however, the cellular mechanisms remain largely unknown. Objective: This study investigated the cellular mechanism of action of FLE on key skin and immune cells. Methods: We examined the effects of FLE on the clinical presentation of inflammation in a representative patient with acne vulgaris. The effect of FLE and an FLE-mimicking control lamp on collagen production from primary human dermal fibroblast (HDF) cells was assessed in the presence and absence of the proinflammatory cytokine, interferon gamma (IFN-γ). Cytokine production was assessed from HDF and human epidermal keratinocytes (HEK) exposed to M1 macrophage-conditioned media following illumination with either a blue light-emitting diode (LED) or FLE. Finally, the effects of FLE on angiogenesis were assessed in human aortic endothelial (HAE) cells. Results: FLE reduced inflammatory lesions and associated redness in the representative acne patient. Following the resolution of inflammation there was an overall enhancement of the skin's texture. FLE enhanced collagen production from nonstressed HDF cells, decreased the inflammatory profile of HDF and HEK cells, and enhanced angiogenesis in HAE cells. Conclusion: Our results suggest FLE is capable of enhancing collagen production, modulating cutaneous inflammation, and encouraging angiogenesis. While further research is required, our findings have important implications for approaches to treating inflammatory skin conditions and achieving better aesthetic outcomes.