Efficacy of Topical Calcipotriol-assisted AFL-PDT in Actinic Keratosis

Efficacy of Topical Calcipotriol-assisted Ablative Fractional Laser Photodynamic Therapy for the Treatment of Actinic Keratosis: 12-month Follow-up Results of a Prospective, Randomised, Comparative Trial

Vitamin D(Vit D) is a pro-differentiation agent that enhances the accumulation of protoporphyrin IX (PpIX) after MAL(methyl-aminolevulinate) incubation in actinic keratosis and may have significant benefit for the treatment of actinic keratosis by ablative fractional laser-primed photodynamic therapy (AFL-PDT).

Study Overview

• Status: Completed
• Conditions: Actinic Dermatosis
• Intervention / Treatment: Drug: Topical Vitamin D (Calcipotriol) application; Drug: lidocaine/prilocaine (5%) application; Device: 2940-nm Er:YAG AFL pretreatment; Drug: MAL application; Other: Measurements of the fluorescence intensity; Device: irradiation with red light-emitting diode lamp; Drug: Placebo cream application

Detailed Description

Photodynamic therapy (PDT) with methyl-aminolevulinate (MAL) is effective in the treatment of actinic keratosis (AK). Many strategies have been studied to improve the production of protoporphyrin IX (PpIX), to improve efficacy of PDT. Pre-treatment of the skin with fractional laser resurfacing is a novel alternative technique to improve the efficacy of PDT for AK. The investigators' previous studies showed that ablative fractional laser primed PDT (AFL-PDT) offered higher efficacy than conventional MAL-PDT in the treatment of AK. But, reduced response rates are also observed in thicker skin lesions, which may be due to insufficient PpIX accumulation within the target tissue.

Cellular differentiation leads to increased synthesis of PpIX from MAL and consecutively, differentiation therapy enhances photosensitization effect. Topical calcipotriol is a well-known pro-differentiation hormone and was demonstrated to influence the effect of PDT on keratinocytes.

The aim of this study was to evaluate efficacy of topical vitamin D in AFL-PDT for AK treatment. Consequently, the investigator compared efficacy, recurrence rate, cosmetic outcome and safety between VitD - AFL-PDT and conventional AFL-PDT.

• Study Type: Interventional
• Enrollment (Actual): 48
• Phase: Phase 1

Contacts and Locations

Study Locations

• Korea, Republic of
  • Busan, Seo-gu, Korea, Republic of, 602-715, Korea, Republic of
    • Dong-A University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 65 years to 85 years (Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Korean patients aged ≥ 18 years who had biopsy-confirmed Actinic keratosis lesions

Exclusion Criteria:

• calcium metabolic disorder patients
• photosensitivity disorder patients
• lactating or pregnant women
• patients with porphyria or a known allergy to any of the constituents of the MAL cream and lidocaine
• patients with systemic disease, history of malignant melanoma, tendency of melasma development or keloid formation, any AK treatment of the area in the previous 4 weeks, or any conditions associated with a risk of poor protocol compliance; and patients on immunosuppressive treatment

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Factorial Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: GroupA (Vit-D pretreated AFL-PDT group ); Group A was treated with topical VitD-assisted AFL-PDT	Drug: Topical Vitamin D (Calcipotriol) application; Calcipotriol ointment 50 mcg/g (Daivonex, Leo Pharma, Denmark) was applied twice for daily on treatment area for 15 consecutive days.; Drug: lidocaine/prilocaine (5%) application; For AFL pre-treatment, lidocaine/prilocaine (5%) cream (EMLA; Astra Pharmaceuticals, LP, Westborough, MA, USA) was applied to the treatment area under occlusion for 30 min; Device: 2940-nm Er:YAG AFL pretreatment; After the anaesthetic cream was removed, AFL therapy was performed using a 2940-nm Er:YAG AFL (Joule; Sciton Inc., Palo Alto, CA, USA) at 300-550 µm ablation depth, level 1 coagulation, 22% treatment density and a single pulse; Drug: MAL application; Immediately after AFL treatment, an approximately 1- mm-thick layer of MAL (Metvix, PhotoCure ASA, Oslo, Norway) was applied to the lesion and on 5 mm of surrounding normal tissue. Incubation time is 3 hours; Other: Measurements of the fluorescence intensity; After 3 hours of application with MAL, saline wash was performed and fluorescence imaging analysis was performed with ultraviolet examination light (model 31602,356 nm; Burton Medical Products Crop.) at 10 cm height above the base of each lesion. The red fluorescence (610 nm-700 nm) was separated and extracted by ImageJ program and then used to measure the amount of 633 nm fluorescence of protoporphyrin IX.; Device: irradiation with red light-emitting diode lamp; After incubation for 3 hours, the dressing and cream were removed, and the area was cleansed with saline. The area was irradiated with a red light-emitting diode lamp (Aktilite CL 128; PhotoCure ASA, Oslo, Norway) with peak emission at 632 nm, placed 5 cm away from the skin surface, and a total light dose of 37 J/cm-2. All patients wore protective goggles during illumination.
Active Comparator: GroupB (Conventional AFL PDT group ); Group B was treated with conventional AFL-PDT	Drug: lidocaine/prilocaine (5%) application; For AFL pre-treatment, lidocaine/prilocaine (5%) cream (EMLA; Astra Pharmaceuticals, LP, Westborough, MA, USA) was applied to the treatment area under occlusion for 30 min; Device: 2940-nm Er:YAG AFL pretreatment; After the anaesthetic cream was removed, AFL therapy was performed using a 2940-nm Er:YAG AFL (Joule; Sciton Inc., Palo Alto, CA, USA) at 300-550 µm ablation depth, level 1 coagulation, 22% treatment density and a single pulse; Drug: MAL application; Immediately after AFL treatment, an approximately 1- mm-thick layer of MAL (Metvix, PhotoCure ASA, Oslo, Norway) was applied to the lesion and on 5 mm of surrounding normal tissue. Incubation time is 3 hours; Other: Measurements of the fluorescence intensity; After 3 hours of application with MAL, saline wash was performed and fluorescence imaging analysis was performed with ultraviolet examination light (model 31602,356 nm; Burton Medical Products Crop.) at 10 cm height above the base of each lesion. The red fluorescence (610 nm-700 nm) was separated and extracted by ImageJ program and then used to measure the amount of 633 nm fluorescence of protoporphyrin IX.; Device: irradiation with red light-emitting diode lamp; After incubation for 3 hours, the dressing and cream were removed, and the area was cleansed with saline. The area was irradiated with a red light-emitting diode lamp (Aktilite CL 128; PhotoCure ASA, Oslo, Norway) with peak emission at 632 nm, placed 5 cm away from the skin surface, and a total light dose of 37 J/cm-2. All patients wore protective goggles during illumination.; Drug: Placebo cream application; placebo cream (indistinguishable from calcipotriol cream by visual and physical appearance and sense of smell) was applied twice for daily on treatment area for 15 consecutive days.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Differences of short-term complete response rates between VitD-AFL-PDT and AFL-PDT	Lesion responses were classified as either a complete response (complete disappearance of the lesion) or a noncomplete response (incomplete disappearance)	Short-term complete response rates were evaluated at 3 months after treatment
Differences of long-term complete response rates between VitD-AFL-PDT and AFL-PDT	In all cases of complete response, the patients were reviewed at 12 months to check for recurrence. Recurrence was assessed by inspection, dermoscopy, photography, palpation, and histologic findings. For the histopathologic evaluation of treatment response, at the 12-month follow-up visit, a 3-mm punch biopsy of the treated AK lesion was performed in all cases of clinically incomplete response.	Long-term complete response rates were evaluated at 12 months
Difference of the recurrence rates between VitD-AFL-PDT and AFL-PDT	In all cases of complete response, the patients were reviewed at 12 months to check for recurrence. Recurrence was assessed by inspection, dermoscopy, photography, palpation, and histologic findings. For the histopathologic evaluation of treatment response, at the 12-month follow-up visit, a 3-mm punch biopsy of the treated AK lesion was performed in all cases of clinically incomplete response.	Recurrence rates were evaluated respectively at 12 months after treatment.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Differences of cosmetic outcomes between VitD-AFL-PDT and AFL-PDT	Cosmetic outcomes were graded as excellent (slight redness or pigmentation change), good (moderate redness or pigmentation change), fair (slight-to-moderate scarring, atrophy, or induration), or poor (extensive scarring, atrophy, or induration)	The overall cosmetic outcome was assessed 12 months after treatment
Difference of adverse events (erythema, post-inflammatory hyperpigmentation, edema, itching, oozing, bleeding) rates between VitD-AFL-PDT and AFL-PDT	Adverse events reported by the patient were noted at each follow-up visit, including severity, duration and need for additional therapy. All events due to PDT were described as phototoxic reactions (i.e., erythema, post-inflammatory hyperpigmentation, oedema, itching, oozing, bleeding and so forth).	Within 12 months after each treatment

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Differences of the fluorescence intensity between VitD-AFL-PDT and AFL-PDT	After 3 hours of application with MAL, Fluorescence imaging analysis was performed on treatment area with ultraviolet examination light (model 31602,356 nm; Burton Medical Products Crop.) at 10 cm height above the base of each lesion. The red fluorescence was separated and extracted by ImageJ program and then used to measure the amount of 633 nm fluorescence of protoporphyrin IX.	After 3 hours of application with MAL, fluorescence intensity imaging was assessed 10 minutes before illumination.

Collaborators and Investigators

• Sponsor: Dong-A University

Study record dates

Study Major Dates

• Study Start: May 1, 2014
• Primary Completion (Actual): August 1, 2015
• Study Completion (Actual): August 1, 2015

Study Registration Dates

• First Submitted: November 5, 2016
• First Submitted That Met QC Criteria: November 28, 2016
• First Posted (Estimate): November 29, 2016

Study Record Updates

• Last Update Posted (Estimate): November 29, 2016
• Last Update Submitted That Met QC Criteria: November 28, 2016
• Last Verified: November 1, 2016

More Information

Terms related to this study

• Keywords: Vitamin D; Photodynamic therapy; Actinic keratosis; Calcipotriol; Ablative fractional laser
• Additional Relevant MeSH Terms: Neoplasms; Precancerous Conditions; Keratosis, Actinic; Keratosis; Skin Diseases; Physiological Effects of Drugs; Molecular Mechanisms of Pharmacological Action; Anti-Arrhythmia Agents; Central Nervous System Depressants; Peripheral Nervous System Agents; Sensory System Agents; Anesthetics; Dermatologic Agents; Micronutrients; Membrane Transport Modulators; Anesthetics, Local; Voltage-Gated Sodium Channel Blockers; Sodium Channel Blockers; Vitamins; Bone Density Conservation Agents; Anesthetics, Combined; Lidocaine; Vitamin D; Calcipotriene; Prilocaine; Lidocaine, Prilocaine Drug Combination
• Other Study ID Numbers: DAUderma-07

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No