Conventional Photodynamic Therapy vs. Painless Photodynamic Therapy for Moderate or Severe Acne

Study Overview
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Brief Summary
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This study is being done to compare a new, continuous illumination and short Incubation time regimen of aminolevulinic acid photodynamic therapy#ALA- PDT) to a conventional regimen for treatment of Moderate or Severe Acne. The hypothesis is that the continuous illumination approach will be less or even no painful, but equally efficacious, as the old regimen.

Official Title
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Conventional Photodynamic Therapy vs. Painless Photodynamic Therapy for Moderate or Severe Acne#a Randomized, Open-label Trial

Conditions
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Acne

Intervention / Treatment
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* Procedure: Aminolevulinic acid photodynamic therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Clinical diagnosed with moderate to severe acne; Male and female patients of age between 18-30 years old ; All patients read the instructions of the subject, willing to follow the program requirements; No other topical treatment received within 2 weeks prior to enrollment; No systemic treatment was given within 4 weeks prior to enrollment; Patients were unsuitable for surgery for various reasons,unwilling to undergo surgery, and signed informed consent when they had informed other alternatives and agreed to take pictures of the lesion. - Exclusion Criteria: Those who did not complete the informed consent; The lesions belongs to any of the following conditions: There is damage and inflammation, which may lead to the drug entering the open wound; Patients with skin photoallergic diseases, porphyria; Known to have a history of allergies to test drugs (porphyrins) and their chemically similar drugs; Patients with other obvious diseases that may affect the evaluation of efficacy; Scars or patients with a tendency to form scars; Known to have severe immune dysfunction, or long-term use of glucocorticoids and immunosuppressants; Severe heart, liver, kidney disease; with hereditary or acquired People with sexual coagulopathy; Those with severe neurological, psychiatric or endocrine diseases; (10)Women who are pregnant, breast-feeding or using inappropriate contraceptives; those with a history of drug abuse; those who have participated in other drug clinical trials within 4 weeks before treatment.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Painless Photodynamic Therapy(P-PDT) group<br>The painless photodynamic therapy group underwent narrow-band light-emitting diode (LED) irradiation (630 nm; 150 J/cm2) after applying 5% 5-aminolevulinic acid#ALA#cream for 30min. A repeat treatment was administered once weekly for a maximum of 3 weeks. | Procedure: Aminolevulinic acid photodynamic therapy<br>* Aminolevulinic acid photodynamic therapy<br>|
| Active Comparator: Conventional Photodynamic Therapy(C-PDT) group<br>The conventional photodynamic therapy(C-PDT) group underwent narrow-band light-emitting diode (LED) irradiation (630 nm; 50 J/cm2) after applying 5% 5-aminolevulinic acid cream for 1.5h.A repeat treatment was administered once weekly for a maximum of 3 weeks. | Procedure: Aminolevulinic acid photodynamic therapy<br>* Aminolevulinic acid photodynamic therapy<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The clearance rate of Moderate or Severe Acne | The clearance rate of Moderate or Severe Acne will be measured at one month after the last treatment | The clearance rate of Moderate or Severe Acne will be measured at one month after the last treatment | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pain assessment | The pain will be assessed using Visual Analogue Scale#VAS) with a score range of 0-10. The higher the score, the greater the pain, with 0 being no pain and 10 being the most unbearable pain. Pain will be measured at different time points during and after every treatment #including immediately, 1st min, 3rd min, 5th min, 7th min, 10th min and 2nd h, 12th h, 24th h and 48th h after treatment. | Immediately, 1st minute, 3rd minute, 5th minute, 7th minute, 10th minute and 2 hours, 12 hours, 24hours and 48 hours after treatment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Photodynamic Therapy, Conventional, Painless, Acne