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Peripheral Blood KIT-D816V Mutation in Adult Systemic Mastocytosis (PB-KIT in SM)

26 april 2026 uppdaterad av: The First Affiliated Hospital of Soochow University

Study on the Diagnostic Value of Peripheral Blood KIT-D816V Mutation Detection in Adult Systemic Mastocytosis

This observational study aims to evaluate the diagnostic value and clinical utility of detecting the KIT-D816V mutation in the peripheral blood of adult patients with systemic mastocytosis (SM), using droplet digital PCR (ddPCR). Currently, the diagnosis of SM relies heavily on invasive bone marrow biopsies. This study will determine whether highly sensitive ddPCR testing of peripheral blood could provide a reliable, minimally invasive alternative for detecting the KIT-D816V mutation, which is a key driver of the disease and a major diagnostic criterion. The results could optimize the diagnostic process and continuous monitoring of adult SM patients.

Studieöversikt

Status

Rekrytering

Betingelser

Detaljerad beskrivning

Systemic mastocytosis (SM) is a rare hematologic neoplasm characterized by the abnormal clonal proliferation and accumulation of mast cells in various organs, most notably the bone marrow. The somatic KIT-D816V mutation is identified in over 90% of adult patients with SM and serves as a major World Health Organization (WHO) diagnostic criterion.

Traditionally, detecting this mutation and definitively diagnosing SM requires a bone marrow aspiration and biopsy, which are invasive, painful, and carry procedural risks. While peripheral blood allele burdens are generally lower than those in the bone marrow, the advent of ultra-sensitive molecular techniques, such as droplet digital PCR (ddPCR), has opened new avenues for non-invasive testing.

This study (ID: SZ-SM02) is designed to systematically investigate the efficacy of detecting the peripheral blood KIT-D816V mutation in adult SM patients. By utilizing ddPCR, we will quantify the mutant allele burden in peripheral blood samples and correlate these findings with matched bone marrow biopsy results, clinical symptom severity, and disease subtypes. The primary objective is to assess the sensitivity, specificity, and overall diagnostic accuracy of peripheral blood ddPCR compared to the gold-standard bone marrow evaluation. Secondary objectives include evaluating the feasibility of using peripheral blood mutational burden as a dynamic biomarker for monitoring disease progression and treatment response. Ultimately, this study seeks to validate a less invasive diagnostic pathway that reduces the burden on patients while maintaining high diagnostic precision.

Studietyp

Observationell

Inskrivning (Beräknad)

50

Kontakter och platser

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Studiekontakt

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Studieorter

  • Kina
    • Jiangsu
      • Suzhou, Jiangsu, Kina, 215000
        • Rekrytering
        • The First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology
        • Kontakt:

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen
  • Äldre vuxen

Tar emot friska volontärer

Nej

Testmetod

Icke-sannolikhetsprov

Studera befolkning

The study population consists of two main cohorts: adult patients presenting with symptoms indicative of suspected systemic mastocytosis (SM) who require diagnostic evaluation, and a control cohort of adult patients diagnosed with non-SM hematologic diseases. Participants will be recruited from the clinical setting during their standard care visits.

Beskrivning

Inclusion Criteria:

  • Age >= 18 years.
  • Presenting with recurrent idiopathic anaphylactic reactions (e.g., hypotension, syncope), mast cell activation syndrome (MCAS)-related symptoms (flushing, abdominal pain, diarrhea), urticaria pigmentosa, or histopathological findings of mast cell aggregation.
  • No prior treatment with KIT inhibitors or drugs affecting mast cell function (e.g., corticosteroids, interferon, immunosuppressants).
  • Willingness to undergo bone marrow examination and peripheral blood KIT-D816V testing, consent to biannual clinical follow-up for 6 months, and signing of the informed consent form.

Exclusion Criteria:

  • Patients from whom specimens cannot be obtained (e.g., due to comorbidities or coagulation abnormalities preventing sufficient peripheral blood collection or bone marrow biopsy).
  • Prior diagnosis of other clonal hematologic diseases (e.g., other types of leukemia or lymphoid malignancies) that could interfere with the specificity of the KIT-D816V mutation assessment.
  • Treatment with targeted KIT drugs (e.g., imatinib, avapritinib) within the last 3 months.
  • Systemic corticosteroid, interferon, or immunosuppressive therapy within the last 1 month.
  • Refusal to participate or inability to complete follow-up due to severe comorbidities or other personal reasons.

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Kohorter och interventioner

Grupp / Kohort
Suspected Systemic Mastocytosis (SM) Patients
Adult patients with suspected systemic mastocytosis (SM). Matched peripheral blood and bone marrow samples will be collected from these patients for the detection and quantification of the KIT-D816V mutation via droplet digital PCR (ddPCR).
Non-SM Hematologic Disease Patients (Control)
Adult patients diagnosed with non-SM hematologic diseases, serving as the control cohort. Matched peripheral blood and bone marrow samples will be collected for comparative KIT-D816V mutation analysis.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
To assess the diagnostic efficacy of peripheral blood KIT-D816V mutation detection using ddPCR for Systemic Mastocytosis (SM).
Tidsram: At the time of diagnosis and initial bone marrow biopsy.
To evaluate the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and Area Under the Curve (AUC) of ddPCR detection of the KIT-D816V mutation in peripheral blood for the diagnosis of SM, compared to bone marrow biopsy.
At the time of diagnosis and initial bone marrow biopsy.

Samarbetspartners och utredare

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Sponsor

The First Affiliated Hospital of Soochow University

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

19 maj 2025

Primärt slutförande (Beräknad)

19 maj 2028

Avslutad studie (Beräknad)

31 juli 2028

Studieregistreringsdatum

Först inskickad

26 april 2026

Först inskickad som uppfyllde QC-kriterierna

26 april 2026

Första postat (Faktisk)

1 maj 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

1 maj 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

26 april 2026

Senast verifierad

1 april 2026

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • SZ-SM02

Plan för individuella deltagardata (IPD)

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NEJ

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