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Pilot Study of Combination Treatment With Subcision, Human Adipose Tissue-Derived Exosomes and Powdered Polydioxanone for Atrophic Acne Scars

28. oktober 2026 opdateret af: COSMEDICIAN AP SDN BHD

Adipose-Derived Stem Cell Exosomes and Powdered Polydioxanone as Adjuncts to Subcision for Atrophic Acne Scars: A Prospective Split-Face Pilot Study

This pilot study compared two treatments for depressed acne scars: subcision alone and subcision followed by injections containing exosomes derived from human fat-derived stem cells and powdered polydioxanone (PDO). Subcision is a procedure that releases bands of tissue beneath the skin that pull acne scars downward.

Twelve adults with acne scars on both sides of the face participated at one clinic in Kuala Lumpur, Malaysia. Each participant received subcision alone on the left side and subcision with the additional injections on the right side. Three treatment sessions were performed four weeks apart, with a final assessment at Week 12.

The study examined whether adding the injections improved acne scar severity and overall appearance compared with subcision alone. Skin quality, treatment discomfort, recovery time, and unwanted effects were also assessed. A dermatologist who did not know which treatment each side received evaluated standardized photographs. This small study was intended to provide preliminary information to help plan larger studies.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This prospective, single-centre, non-randomised, assessor-blinded, split-face comparative pilot study evaluated the addition of human adipose-derived stem cell exosomes (hADSC-Exos) and powdered polydioxanone (PDO) to subcision for atrophic acne scars.

The split-face design allowed comparison of the treatments within the same participant. Treatment allocation was fixed: the left side received subcision alone, and the right side received the same subcision procedure followed by injection of the combined hADSC-Exos/PDO formulation. Participants were aware of treatment allocation.

Twelve participants were enrolled through convenience sampling at FFIMT Clinic, Kuala Lumpur, Malaysia. No formal efficacy sample-size calculation was performed because prior treatment-effect and variability estimates were unavailable. The pilot sample was selected to provide preliminary estimates of treatment effects, variability, and feasibility for subsequent studies.

Treatment sessions took place at Weeks 0, 4, and 8. On the combination-treatment side, 2.5 mL of the prepared hADSC-Exos/PDO suspension was injected into the subdermal plane after scar release. The final clinical assessment occurred at Week 12, four weeks after the third treatment.

Standardized facial photographs were obtained at baseline and Week 12 under consistent lighting, positioning, and camera settings. An independent dermatologist, blinded to treatment allocation and assessment time point, performed the photographic assessments. Participant assessments, treatment diaries, and investigator clinical assessments provided additional information on perceived improvement, skin quality, procedural pain, recovery, and treatment-emergent adverse effects.

The study received UCSI University Institutional Review Board approval before recruitment, and all participants provided written informed consent before study procedures.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

12

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • Kuala Lumpur
      • Kuala Lumpur, Kuala Lumpur, Malaysia, 50088
        • FFIMT Clinic

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 55 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  1. Adults aged 18 to 55 years, of any sex, ethnicity, or nationality.
  2. Bilateral atrophic acne scars of clinically comparable severity.
  3. No acne-scar treatment during the three months before enrollment.
  4. Able to understand the study information and willing to provide written informed consent.

Exclusion Criteria:

  1. Active inflammatory acne.
  2. Active herpes labialis.
  3. Human immunodeficiency virus (HIV) infection.
  4. Hepatitis B infection.
  5. History of keloid or hypertrophic scar formation.
  6. Bleeding disorders.
  7. Pregnancy or lactation.
  8. Previous facial surgery.
  9. Current systemic isotretinoin use or use within the six months before enrollment.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Aktiv komparator: Subcision Alone - Left Facial Side

The left facial side of each participant received subcision alone using a blunt-tip cannula to release fibrotic adhesions beneath atrophic acne scars. Three sessions were performed at Weeks 0, 4, and 8.

Subdermal release of fibrotic scar adhesions using a 25-gauge, 50-mm blunt-tip cannula, with linear lancing and side-to-side fanning movements. Performed at Weeks 0, 4, and 8.

Eksperimentel: Subcision Plus hADSC-Exos/PDO - Right Facial Side

The right facial side of each participant received subcision followed by subdermal injection of 2.5 mL of a suspension containing human adipose-derived stem cell exosomes and powdered polydioxanone. Three sessions were performed at Weeks 0, 4, and 8.

Subdermal release of fibrotic scar adhesions using a 25-gauge, 50-mm blunt-tip cannula, with linear lancing and side-to-side fanning movements. Performed at Weeks 0, 4, and 8.

A suspension prepared by mixing 5 mL of human adipose-derived stem cell exosomes, containing approximately 15 billion particles, with 150 mg of powdered polydioxanone. A 2.5-mL volume of the prepared suspension was injected subdermally into the right facial side after subcision at each treatment session.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Atrophic Acne Scar Severity Using the Goodman and Baron Qualitative Acne Scar Grading System
Tidsramme: Baseline (Week 0) and Week 16

Change from baseline to Week 16 in acne scar severity, assessed separately for each facial side by an independent blinded dermatologist using standardized photographs. The Goodman and Baron Qualitative Acne Scar Grading System grades severity from 1 to 4: grade 1 = macular scarring, grade 2 = mild scarring, grade 3 = moderate scarring, and grade 4 = severe scarring. Lower grades indicate less severe scarring. Changes will be compared between the combination-treatment side and the subcision-only side.

Baseline (Week 0) and Week 16

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Dermatologist-Rated Global Aesthetic Improvement Scale
Tidsramme: Week 16

Overall aesthetic improvement of each facial side, assessed by the blinded dermatologist using the Global Aesthetic Improvement Scale: 1 = exceptional improvement, 2 = very improved, 3 = improved, 4 = unaltered, and 5 = worsened. Lower scores indicate greater improvement.

Week 16
Change in Participant-Rated Satisfaction With Facial Appearance
Tidsramme: Baseline (Week 0) and Week 16

Participant-rated satisfaction with facial appearance before and after treatment, using a four-category self-satisfaction scale: 1 = poor (0-24%), 2 = good (25-49%), 3 = very good (50-74%), and 4 = excellent (75-100%). Higher scores indicate greater satisfaction.

Baseline (Week 0) and Week 16
Procedural Pain
Tidsramme: Immediately after treatment at Weeks 0, 4, 8, 12 and through week 16

Participant-rated pain immediately after each treatment, measured using a Numeric Rating Scale from 0 = no pain to 10 = worst imaginable pain. Higher scores indicate greater pain.

Immediately after treatment at Weeks 0, 4, 8, 12 and through week 16
Duration of Post-Procedural Downtime
Tidsramme: Following treatments at Weeks 0, 4, 8, 12 and through week 16

Duration of post-procedural downtime in days after each treatment session, recorded using participant treatment diaries and investigator assessments.

Following treatments at Weeks 0, 4, 8, 12 and through week 16
Change in Skin Colour Unevenness
Tidsramme: Baseline (Week 0) and Week 16

Change from baseline to Week 16 in skin colour unevenness, assessed using the corresponding item of the Galderma Facial Skin Quality Assessment Scale. Severity is rated from 0 to 3: 0 = none, 1 = mild, 2 = moderate, and 3 = severe. Lower scores indicate more even skin colour.

Baseline (Week 0) and Week 16

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Efterforskere

  • Ledende efterforsker: Edmond Ng Siah Chye, MD, Msc, UCSI University

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. december 2023

Primær færdiggørelse (Faktiske)

1. september 2024

Studieafslutning (Faktiske)

1. januar 2025

Datoer for studieregistrering

Først indsendt

28. oktober 2026

Først indsendt, der opfyldte QC-kriterier

28. oktober 2026

Først opslået (Faktiske)

3. november 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

3. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

28. oktober 2026

Sidst verificeret

1. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • UCSI/IEC-2023-FMHS-0021(A)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

UBESLUTET

IPD-planbeskrivelse

The team has not decided

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