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Combined LASERs and PRP for Postacne Scars

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03809416
Recruitment Status : Completed
First Posted : January 18, 2019
Last Update Posted : November 29, 2019
Universitat Autonoma de Barcelona
Information provided by (Responsible Party):
DEKA S.r.l.

Brief Summary:
This study evaluates a new combined technique using two different laser wavelengths and Platelets Rich Plasma (PRP) to treat post-atrophic acne scars. Within the available knowledge of laser-tissue interactions and effects of PRP on wound healing, we will explore the clinical effects of our new combination procedure on a histopathological and immunohistochemical basis for guiding future post acne scars clinical research.

Condition or disease Intervention/treatment Phase
Atrophic Acne Scar Device: Lasers Other: Platelets Rich Plasma Combination Product: Lasers plus Normal Saline Solution Not Applicable

Detailed Description:

The carbon dioxide and erbium lasers have been the gold and silver standards for acne scars treatment. As with selective photothermolysis, a major advance in the field is the incorporation of grids of MicroThermal Zones (MTZ) that spares islands of skin with an attractive treatment efficacy to downtime healing (5-7 days) ratio. Application of these fractionated resurfacing to carbon dioxide and erbium lasers allows deeper penetration into the skin.

Fractional photothermolysis was first described by as a new method for delivery of laser energy with the potential of laser safety and efficacy. Through the delivery of microscopic, non-contagious zones of thermal damage using a 1550 nm, mid-infra-red laser source, it was observed that surrounding islands of dermal and epidermal cells facilitated post-treatment collagen remodeling and rapid healing. Despite the success of minimally ablative and fractional technologies, there remained a need for more aggressive tissue ablation for the purposes of tissue rejuvenation of severely photodamaged skin and deeper rhytides. This might be due to the variability of architecture, depth, and width; thus, each type of scar has an optimal method by which it can be improved.

The idea of combining both carbon dioxide and erbium lasers appeared even before the era of fractional lasers. McDaniel et al, combined both non-fractional lasers for resurfacing of perioral rhytides comparing it to using carbon dioxide lasers alone and concluded that carbon dioxide laser resurfacing followed by 3 passes of erbium laser reduces the duration of crusting, swelling and itching when compared to carbon dioxide laser resurfacing alone with no significant difference in the outcome.

Later in 2010, the combination of fractional lasers carbon dioxide and erbium-doped laser was tried out for treating mild acne scars by a group of researchers. They reported a longer post laser erythema and hyperpigmentation, without precise pathogenesis. However, they suggested that these unexpected outcomes may have resulted from bulk heat damage to the surrounding tissues by heat stacking and recommended further studies to determine the optimal treatment parameters and reduce unexpected adverse reactions.

Platelet-rich plasma (PRP) is a high concentration of platelets in a small volume of plasma. PRP contains various growth factors and cytokines released by platelets, and those substances play a critical role in all aspects of the wound healing process. Among the stored mitogenic factors essential for wound repair are platelet-derived growth factor (PDGF) with the -AB and -C isoforms predominating, transforming growth factor β (TGF-β), vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF), platelet-derived epidermal growth factor (PDEGF) and insulin-like growth factor-1 (IGF-1). These are variously involved in stimulating chemotaxis, cell proliferation, and maturation. PDGF is a powerful chemoattractant and stimulator of cell proliferation. All of them are potent angiogenic factors and endothelial cell mitogens. The wound healing effect of PRP is relatively well known, and PRP has been used in bone surgery, tendon and ligament repair, and chronic leg ulcer treatment.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 32 participants
Allocation: Non-Randomized
Intervention Model: Factorial Assignment
Masking: Double (Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Combined Fractional LASERs Resurfacing With Platelets Rich Plasma (PRP) for Treating Post Acne Atrophic Scarring
Actual Study Start Date : October 1, 2018
Actual Primary Completion Date : June 30, 2019
Actual Study Completion Date : October 30, 2019

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Acne Scars

Arm Intervention/treatment
No Intervention: Control
32 biopsy specimens from acne scars will be excised without any treatment.
Sham Comparator: Lasers plus Normal Saline Solution
32 biopsy specimens will be excised immediately after being treated with lasers and subsequent injection of normal saline solution.
Device: Lasers
Fractional carbon dioxide laser will be applied only over spots of deep post-acne scars, while Erbium: Glass will be applied all over face except to the two predetermined spots, i.e. control and another spot where NSS will be injected.
Other Name: Fractional CO2 and Erbium Glass Lasers

Combination Product: Lasers plus Normal Saline Solution
Normal Saline Solution will be injected only in one spot after combined lasers resufacing to act as sham comparator compared to the other spot of Lasers plus PRP injection
Other Name: NSS

Active Comparator: Lasers plus Platelets Rich Plasma (PRP)
32 biopsy specimens will be excised immediately after being treated with lasers and subsequent injection of platelets Rich Plasma (PRP).
Device: Lasers
Fractional carbon dioxide laser will be applied only over spots of deep post-acne scars, while Erbium: Glass will be applied all over face except to the two predetermined spots, i.e. control and another spot where NSS will be injected.
Other Name: Fractional CO2 and Erbium Glass Lasers

Other: Platelets Rich Plasma
Platelet Rich Plasma (PRP) will be prepared from autologous blood collection in a syringe prefilled with anticoagulant solution followed by centrifugation then adding calcium gluconate 10% for induction of platelet activation. Activated PRP will be injected for all carbon dioxide laser spots in each patient immediately after each laser session except for two predetermined spots, i.e. control and sham comparator, which will be injected by normal saline solution (NSS).
Other Name: PRP

Primary Outcome Measures :
  1. Change in Patients' response denoting early Clinical improvement [ Time Frame: 4 weeks after the 1st session ]
    calculating the change in 17 questions' responses of a new Patient Oriented Tool questionnaire for assessing Atrophic Acne Scarring through two parts; a) assessment of Acne Scar Appearance and b) Acne Scar Quality of Life questionnaire. Patients will record their responses before the 1st session and on the date of 2nd session.

  2. Final Clinical improvement assessed using (0-10) scoring scale by blind assessors [ Time Frame: 12 weeks after the 4th session ]
    The change in scores comparing 2 sets of digital photographs for each patient evaluated by 3 blind assessors, before and after 12 weeks of the 4th session. This blind assessment score will be compared to patients' score in their previous questionnaire.

Secondary Outcome Measures :
  1. Higher new collagen formation in scars treated using lasers plus PRP technique [ Time Frame: Immediately after the 1st session ]
    Picrosirus Red stained specimens under circularly polarized microscopy will be segmented into two color threshold bands (Green/Yellow G/Y and Red/Orange R/O) in the color HSB space. This will be numerically evaluated using ImageJ computer program

  2. Immunohistochemical evaluation of Collagen I, Collagen III, and MMP-2 [ Time Frame: Immediately after the 1st session ]
    Using a 4 grade scale (0, +, ++, +++), the 288 slides (i.e. 3 slides prepared from 96 specimens obtained from 32 patients) will be arranged for comparison among control, sham comparator and, active comparator. Also, results will be correlated to previous numerical ImageJ computerized assessment and patients' clinical improvement.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  1. Patients with atrophic post-acne scars.
  2. Patients without surgical &/or LASER resurfacing treatment for acne scars within the last 6 months.

Exclusion Criteria:

  1. Pregnancy
  2. Present or past history of hypertrophic scars or keloids
  3. Present or past history of photosensitivity dermatoses including Connective Tissue Diseases.
  4. Present history of herpes infection
  5. Present history of Anemia (HGB < 10 g/dl), Thrombocytopenia &/or Platelets dysfunction.
  6. Patients receiving isotretinoin within the last 3 months, NSAIDs within 72 hours of the procedure, anticoagulants &/or systemic use of corticosteroids within 2 weeks.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03809416

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DEKA M.E.L.A. S.r.l.
Firenze, Calenzano, Italy, 50041
Cosmetic Surgery Clinic
Al Qādisīyah, Kuwait, 35858
Sponsors and Collaborators
DEKA S.r.l.
Universitat Autonoma de Barcelona
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Study Director: Lluis Puig, MD, PhD Universitat Autonoma de Barcelona (UAB)
Principal Investigator: Alberto Calligaro, MD, PhD University of Pavia

Publications of Results:
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Responsible Party: DEKA S.r.l. Identifier: NCT03809416    
Other Study ID Numbers: AY001
First Posted: January 18, 2019    Key Record Dates
Last Update Posted: November 29, 2019
Last Verified: November 2019
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: No
Keywords provided by DEKA S.r.l.:
Acne scars
fractional lasers
Additional relevant MeSH terms:
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Pathological Conditions, Anatomical
Pharmaceutical Solutions