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Assessment of cfDNA-STING Axis as a Potential Pathological Marker in Atopic Dermatitis

9. juni 2026 opdateret af: Yakun Hu, Zhongda Hospital

An Observational Study on the Correlation Between Circulating Cell-free DNA and Skin Macrophage STING Pathway Activation in Patients With Atopic Dermatitis

Study Overview Atopic dermatitis (AD), commonly known as eczema, is a chronic inflammatory skin condition characterized by intense itching and skin barrier damage. While researchers know that the immune system is overactive in AD, it is difficult to measure the exact level of "damage" or "inflammation" happening deep within the skin using only a physical exam.

The Purpose of This Study This study investigates a specific "danger signal" called circulating cell-free DNA (cfDNA). When skin cells are damaged or die due to inflammation, they release tiny fragments of DNA into the bloodstream. The investigators believe these fragments might act as a trigger for the immune system, worsening the disease.

What the Study Involves Researchers will collect blood samples and small skin biopsies from patients with AD and healthy volunteers.

The study aims to: Compare the levels of cfDNA in the blood of AD patients versus healthy individuals. Determine if higher levels of cfDNA correlate with more severe skin symptoms (measured by scores like SCORAD and EASI). Examine how immune cells in the skin (macrophages) respond to these DNA fragments through a specific biological switch called the STING pathway.

Potential Impact By understanding this "damage-signal" loop, this research may lead to new ways for doctors to monitor AD severity through simple blood tests and could identify new targets for future anti-inflammatory treatments.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Scientific Rationale AD is primarily driven by Type 2 (Th2) immune responses; however, the role of innate immune sensing of damage-associated molecular patterns (DAMPs) in maintaining chronic inflammation is less defined. Cell-free DNA (cfDNA) has emerged as a potent DAMP in various autoimmune conditions. This study explores the hypothesis that cfDNA released during epidermal injury and inflammatory cell turnover in AD serves as a ligand for the cyclic GMP-AMP synthase (cGAS) - Stimulator of Interferon Genes (STING) pathway within the skin microenvironment.

Study Objectives Quantification of Systemic DAMPs: To quantify plasma cfDNA concentrations in a cohort of AD patients (n=40) compared to age- and sex-matched healthy controls (n=40) using fluorometric assays. Tissue-Level Mechanism: To characterize the local immune landscape via immunofluorescence (IF) staining of skin biopsies. The study focuses on the infiltration density of CD68+ macrophages and the expression/co-localization of STING protein within these cells.

Methodology Clinical Assessment: Patients undergo standardized dermatological evaluation to determine disease severity. Bio-sampling: Peripheral blood is collected for baseline hematology and cfDNA isolation. For a subset of patients, 4mm punch biopsies are taken from active lesional skin. Data Analysis: Cross-sectional analysis will be used to determine the diagnostic value of cfDNA and its ability to stratify disease severity (Moderate vs. Severe AD). Immunohistochemical quantification will be used to verify the activation of the STING pathway in situ.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

80

Kontakter og lokationer

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

Studiesteder

  • Kina
    • Jiangsu
      • Nanjing, Jiangsu, Kina
        • Rekruttering
        • Zhongda Hospital, Southeast University
        • Kontakt:

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

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

This group consists of patients diagnosed with Atopic Dermatitis according to the Hanifin and Rajka criteria or the Williams diagnostic criteria.

Beskrivelse

Inclusion Criteria:

  • Age 18 years or older
  • Confirmed diagnosis of Atopic Dermatitis

Exclusion Criteria:

  • Use of systemic immunosuppressants, systemic corticosteroids, or biological agents within 4 weeks prior to enrollment
  • Use of topical treatments within 2 weeks prior to enrollment

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
AD
This group consists of patients diagnosed with Atopic Dermatitis (AD) according to the Hanifin and Rajka criteria or the Williams diagnostic criteria.
Biologisk: blood sampling
One-time peripheral venous blood collection and/or 4mm punch biopsy for biomarker analysis.
Control
This group consists of healthy volunteers with no personal or family history of atopic dermatitis, asthma, allergic rhinitis, or other systemic inflammatory and autoimmune diseases.
Biologisk: blood sampling
One-time peripheral venous blood collection and/or 4mm punch biopsy for biomarker analysis.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
cfDNA
Tidsramme: enrollment
the quantification of circulating cell-free DNA
enrollment

Samarbejdspartnere og efterforskere

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

Sponsor

Zhongda Hospital

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.

Generelle publikationer

Hjælpsomme links

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. februar 2026

Primær færdiggørelse (Anslået)

30. juni 2026

Studieafslutning (Anslået)

31. juli 2026

Datoer for studieregistrering

Først indsendt

30. april 2026

Først indsendt, der opfyldte QC-kriterier

30. april 2026

Først opslået (Faktiske)

7. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

11. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

9. juni 2026

Sidst verificeret

1. juni 2026

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2025ZDSYLL537P01

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

To protect the privacy and confidentiality of the study participants in accordance with ethical committee guidelines and data protection regulations.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Ingen

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Ingen

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Atopisk dermatitis (eksem)

Kliniske forsøg med blood sampling

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Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner