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NCT06655233

Profiling the Intratumoral Microbiome of Pancreatic Ductal Adenocarcinoma Based on EUS-FNB Tissue Samples and Exploring Its Impact on Tumor Diagnosis and Prognosis.

Recruiting now Last updated 23 October 2024
What this trial tests

trial in Pancreatic Cancer in 50 participants. Currently enrolling.

Timeline
1 October 2024
Primary endpoint
30 December 2025
30 May 2026

Quick facts

Lead sponsorThe Third Xiangya Hospital of Central South University
StatusRecruiting now
Study typeOBSERVATIONAL
Enrollment50
Start date1 October 2024
Primary completion30 December 2025
Estimated completion30 May 2026
Sites1 location across China

Conditions studied

Sponsor

The Third Xiangya Hospital of Central South University

Who can join

Adults 18 to 80, any sex, with Pancreatic Cancer or EUS-FNB. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

The goal of this observational study is to use endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) to investigate the intratumoral microbiome profile in patients with pancreatic ductal adenocarcinoma (PDAC) and to evaluate its potential impact on tumor diagnosis and prognosis. PDAC is the most common and lethal type of pancreatic cancer, accounting for over 85% of all pancreatic cancer cases. Given that most patients are diagnosed at an advanced stage when surgery is no longer an option, EUS-FNB serves as a crucial and minimally invasive method for accessing and analyzing the microbiome within the tumor. The main questions this study aims to answer are: Can EUS-FNB reliably and accurately detect the microbiome within PDAC tumors? Researchers will analyze tissue samples obtained through EUS-FNB to confirm its ability to accurately capture the diversity and composition of the tumor microbiome. Are there specific microbes or metabolites within the PDAC tumor microbiome that are linked to patient prognosis or response to chemotherapy? The study will screen for and identify key microbial species or metabolites associated with treatment outcomes and patient survival in PDAC. To ensure the reliability of the EUS-FNB results, researchers will systematically compare microbiome data obtained from EUS-FNB samples with those from surgical biopsies of pancreatic cancer tissue. This comparison will help validate the consistency and accuracy of the two methods in identifying the microbiome diversity and composition, confirming the clinical and research utility of EUS-FNB. Participant Requirements: Participants will be patients diagnosed with PDAC who require EUS-FNB as part of their clinical assessment and treatment pathway. During the EUS-FNB procedure, researchers will use the remaining tissue after rapid on-site evaluation (ROSE) to conduct microbiome sequencing, ensuring sample quality. All participants will provide informed consent, allowing the use of leftover tissue for microbiome analysis, and their privacy will be strictly protected throughout the study. Study Procedures: Participants will undergo a standard EUS-FNB procedure as part of their routine clinical care, with no additional procedures required for the study. Researchers will compare the microbiome characteristics from EUS-FNB samples with those from surgical biopsy samples to verify consistency. The study will utilize 2bRAD-M metagenomic sequencing technology, which is cost-effective and suitable for low-biomass, host-contaminated, and degraded microbiome samples. This method generates an accurate species-level taxonomic profile for analysis. By identifying key microbial components or metabolites linked to patient prognosis or treatment response, this study aims to provide scientific evidence for early detection strategies and effective treatment plans for PDAC patients, potentially bringing significant clinical benefits.

Publications & conference data

1 peer-reviewed publication reference this trial (live from Europe PMC):

  1. Intratumoral microbiome: the double-edged sword in remodeling cancer immunotherapy.
    Yan D, Yu Y, Liang C, Cui Z, et al · · 2026 · PMID 41530829 · DOI 10.1186/s12943-025-02566-6

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