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Patient-Specific MRD Liquid Biopsy in Resected NSCLC: Plasma and Bronchial Washing ctDNA (MRDetect)

6. November 2026 aktualisiert von: Eun Hye Lee

Development of a Patient-Specific MRD Liquid Biopsy Platform in Resected NSCLC: Combined Analysis of Plasma and Bronchial Washing ctDNA

This is a multicenter, prospective, observational pilot cohort study in patients with surgically resected non-small cell lung cancer (NSCLC, pathologic stage IA3-IIIA). Whole exome sequencing (WES) of each patient's resected tumor tissue and matched normal blood is used to build a patient-specific (tumor-informed) minimal residual disease (MRD) panel, after excluding germline and clonal hematopoiesis variants. MRD is then assessed in paired plasma circulating tumor DNA (ctDNA) and bronchial washing fluid (BWF) ctDNA collected at 6, 12, 18 and 24 months after surgery. The study evaluates whether MRD positivity in plasma and/or BWF is associated with subsequent clinical or radiologic recurrence, compares MRD detection rates and quantitative values between plasma and BWF, and explores the lead time of MRD detection relative to standard surveillance with chest CT and serum CEA. MRD results are not used to confirm recurrence or to change treatment; all clinical decisions follow standard of care. Forty participants will be enrolled at three Severance hospitals in Korea.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Background. Postoperative recurrence is frequent in resected early-stage and locally advanced NSCLC (stage I-IIIA), most often within 2-3 years after surgery. Standard surveillance relies on chest CT and serum tumor markers such as CEA, which cannot detect molecular recurrence at the MRD stage before it appears on imaging. ctDNA-based MRD assessment is being actively investigated in several solid tumors. In early-stage lung cancer, however, plasma ctDNA levels after surgery are very low, which may limit detection sensitivity. Bronchial washing fluid reflects the local tumor environment of the lung, and prior studies suggest it may detect tumor-derived mutations with higher sensitivity than plasma. This study builds a patient-specific, tumor-informed MRD panel for each participant, instead of relying on a fixed generic gene panel, and evaluates plasma and BWF MRD in parallel.

Hypotheses. (1) A patient-specific MRD panel built from resected tumor tissue and normal control specimens can detect postoperative recurrence earlier than conventional imaging-based diagnosis. (2) BWF ctDNA, which reflects the local tumor environment, may show higher MRD detection sensitivity than plasma ctDNA.

Objectives. The primary objective is to evaluate whether MRD positivity in plasma and BWF is associated with subsequent clinical or radiologic recurrence in resected NSCLC. The secondary objectives are (a) to compare MRD detection rates and quantitative values between plasma and BWF and determine which specimen is more sensitive for detecting recurrence, and (b) to explore the lead time of MRD detection relative to recurrence confirmation and compare it with CT and CEA.

Design and procedures. At baseline (first outpatient visit within 1 month after surgery), unstained (10) and stained (1) slides of the surgical pathology specimen are obtained, together with blood for normal control and cfDNA. WES is performed on tumor tissue and buffy coat, and a patient-specific mutation panel is designed. At 6, 12, 18 and 24 months after surgery, 20 mL of blood and 20 mL of BWF (collected by bronchoscopy from the lobe or segment of the original lesion, using saline) are obtained for MRD analysis. Additional blood/BWF MRD assessments may be performed at unscheduled visits when recurrence is clinically suspected. MRD follow-up ends at 24 months, recurrence or death. After 24 months, participants are followed under standard practice (CT and CEA every 3 months) without additional MRD testing. All specimens are shipped under anonymized serial codes to an external laboratory (IMBDx) for analysis and are handled according to the participant's consent regarding retention and secondary use.

Statistical analysis. The main analysis set includes enrolled participants whose patient-specific panel was successfully built and who have at least one evaluable postoperative MRD result. Recurrence-free survival (RFS) of MRD-positive and MRD-negative groups is estimated by the Kaplan-Meier method and compared with the log-rank test. Hazard ratios with 95% confidence intervals are estimated by Cox regression as exploratory analyses. Paired plasma-BWF detection rates are compared with McNemar's test, and paired quantitative values (variant allele frequency) with the paired t-test or Wilcoxon signed-rank test. Sensitivity, specificity, PPV, NPV, ROC curve and AUC are computed exploratorily. Lead time is summarized descriptively. Missing data are not imputed. Because this is a pilot study of 40 participants, results are interpreted by effect sizes and confidence intervals rather than formal significance testing.

Safety and monitoring. MRD results are not used alone to confirm recurrence or change adjuvant therapy. Adverse events related to blood sampling and bronchoscopy are recorded. An independent safety monitor, who is not a member of the study team, will perform two monitoring visits. Serious adverse events are reported according to each institution's IRB requirements. Data from all sites are de-identified, coded, and managed centrally.

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

40

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

  • Name: LEE Eunhye, Ph.D.Course of Medical Science
  • Telefonnummer: +82-10-4099-3780
  • E-Mail: hieunhye@yuhs.ac

Studieren Sie die Kontaktsicherung

  • Name: SHIN Seonhye, Bachelor Degree, Nursing
  • Telefonnummer: +82-10-7767-3489
  • E-Mail: fresh@yuhs.ac

Studienorte

      • Seoul, Südkorea, 03722
        • Noch keine Rekrutierung
        • Severance Hospital
        • Kontakt:
          • SHIN Seonhye, Bachelor Degree, Nursing
          • Telefonnummer: +82-10-7767-3489
          • E-Mail: fresh@yuhs.ac
        • Kontakt:
          • YONG Seunghyun, Ph.D.Course of Medical Science
          • Telefonnummer: +82-10-6366-0213
          • E-Mail: roneirire@yuhs.ac
      • Seoul, Südkorea, 06229
        • Noch keine Rekrutierung
        • Gangnam Severance Hospital
        • Kontakt:
          • SHIN Seonhye, Bachelor Degree, Nursing
          • Telefonnummer: +82-10-7767-3489
          • E-Mail: fresh@yuhs.ac
        • Kontakt:
          • KIM Chiyoung, Ph.D.Course of Medical Science
          • Telefonnummer: +82-10-4182-1095
          • E-Mail: cykim@yuhs.ac
    • Gyeonggi-do
      • Yongin-si, Gyeonggi-do, Südkorea, 16995
        • Rekrutierung
        • Yongin Severance Hospital
        • Kontakt:
          • LEE Eunhye, Ph.D.Course of Medical Science
          • Telefonnummer: +82-10-4099-3780
          • E-Mail: hieunhye@yuhs.ac
        • Kontakt:
          • SHIN Seonhye, Bachelor Degree, Nursing
          • Telefonnummer: +82-10-7767-3489
          • E-Mail: fresh@yuhs.ac

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

19 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

Adult patients (aged 19 years or older) who underwent curative-intent (R0) surgical resection for pathologically confirmed non-small cell lung cancer (NSCLC) with a final pathologic stage of IA3 to IIIA, and who are followed at three tertiary referral hospitals in Korea (Severance Hospital, Gangnam Severance Hospital, and Yongin Severance Hospital). Eligible patients are identified through outpatient and inpatient medical record review and enrolled within 1 month after surgery. A total of 40 participants will be enrolled competitively across the three sites over 2 years.

Beschreibung

Inclusion Criteria:

  • Adults aged 19 years or older
  • Pathologically confirmed non-small cell lung cancer who underwent curative-intent complete (R0) surgical resection
  • Final pathologic stage IA3 (tumor size >2 cm) to IIIA after surgery
  • Able to attend the first outpatient visit within 1 month after surgery, and agrees to research blood sampling, provision of surgical tissue slides, and long-term follow-up
  • Provided voluntary written informed consent after adequate explanation of the study purpose and methods

Exclusion Criteria:

  • Pathologic stage IA1 or IA2 (tumor size ≤2 cm), stage IV, or confirmed distant metastasis
  • Incomplete resection (non-R0) or clear residual tumor after surgery
  • History of other malignancy, including synchronous malignancy in another organ, that may confound interpretation of MRD results (cancers judged cured for more than 5 years may be included)
  • Poor performance status or other conditions making repeated blood sampling or bronchoscopy difficult
  • Unstable cardiopulmonary function, or high risk with sedation or additional procedures, in the judgment of the treating physician
  • Unable to provide informed consent, or judged unable to comply with regular follow-up during the study period

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Beobachtungsmodelle: COHORT
  • Zeitperspektiven: PROSPECTIVE

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
Resected NSCLC (stage IA3-IIIA)

Adults who underwent curative-intent (R0) resection for pathologic stage IA3-IIIA NSCLC. Participants undergo patient-specific MRD panel construction and serial plasma and BWF MRD testing at 6, 12, 18 and 24 months after surgery.

WES of surgical tumor tissue and matched normal blood to design a patient-specific mutation panel, followed by MRD detection in plasma ctDNA and BWF ctDNA at 6, 12, 18 and 24 months after surgery and at unscheduled visits if recurrence is suspected. Results are not used for treatment decisions.

Bronchoscopy performed by the treating pulmonologist, with 20 mL saline bronchial washing from the lobe or segment of the original tumor, at 6, 12, 18 and 24 months after surgery.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Recurrence-free survival (RFS) according to MRD status in plasma and/or BWF ctDNA
Zeitfenster: Up to 24 months after surgery

RFS of MRD-positive versus MRD-negative participants, defined as the time from surgery to first clinical or radiologic recurrence (or death, if applicable). Estimated by the Kaplan-Meier method and compared with the log-rank test. Hazard ratio with 95% confidence interval estimated exploratorily by Cox regression.

Up to 24 months after surgery

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
MRD detection rate in plasma ctDNA versus BWF ctDNA
Zeitfenster: 6, 12, 18 and 24 months after surgery

Proportion of MRD-positive results in paired plasma and BWF samples collected at the same time point, compared with McNemar's test.

6, 12, 18 and 24 months after surgery
Quantitative MRD value (variant allele frequency) in plasma versus BWF
Zeitfenster: 6, 12, 18 and 24 months after surgery

ariant allele frequency of patient-specific variants in paired plasma and BWF samples, compared with the paired t-test or Wilcoxon signed-rank test.

6, 12, 18 and 24 months after surgery
Diagnostic performance of MRD for recurrence
Zeitfenster: Up to 24 months after surgery

Sensitivity, specificity, positive predictive value, negative predictive value, and area under the ROC curve (AUC) of plasma and BWF MRD for detecting recurrence, evaluated exploratorily and compared descriptively with CT and CEA.

Up to 24 months after surgery
Lead time of MRD positivity before recurrence confirmation
Zeitfenster: Up to 24 months after surgery

Interval (months) from first MRD positivity to recurrence confirmed by CT or clinical diagnosis, summarized as mean ± SD or median (IQR), range, and 95% confidence interval, and compared with CT and CEA.

Up to 24 months after surgery

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Mitarbeiter

Ermittler

  • Hauptermittler: LEE Eunhye, Ph.D.Course of Medical Science, Division of Pulmonology, Allergy and Critical Care Medicine, Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

28. September 2026

Primärer Abschluss (Geschätzt)

31. Dezember 2030

Studienabschluss (Geschätzt)

31. Dezember 2031

Studienanmeldedaten

Zuerst eingereicht

2. November 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

2. November 2026

Zuerst gepostet (Tatsächlich)

6. November 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

12. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

6. November 2026

Zuletzt verifiziert

1. November 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Beschreibung des IPD-Plans

Data will be de-identified and managed centrally; individual participant data are not planned to be shared at this time.

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .