Design of the LEONORA Randomized Clinical Trial: Impact of Synbiotic Prophylaxis on Lower Gastrointestinal Symptoms Following Colorectal Cancer Surgery - Summary - MDSpire

Design of the LEONORA Randomized Clinical Trial: Impact of Synbiotic Prophylaxis on Lower Gastrointestinal Symptoms Following Colorectal Cancer Surgery

  • By

  • Ben Schöttker

  • Annette Kopp-Schneider

  • Lena Biehl

  • March 25, 2026

  • 0 min

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Objective:

To test the impact of early post-surgical administration of synbiotics on gastrointestinal function-related quality of life metrics, including specific symptoms and overall well-being, 90 days after surgery, and to assess rates of infection, inflammatory biomarkers, and recurrence-free survival.

Key Findings:
  • Synbiotics may reduce postoperative infections and complications, potentially leading to shorter hospital stays.
  • They can improve gastrointestinal function and quality of life in CRC patients, as evidenced by specific quality of life metrics.
  • The LEONORA trial will be the largest placebo-controlled RCT on synbiotics in CRC patients, providing critical data for future guidelines.
Interpretation:

The trial aims to provide robust evidence on the efficacy of synbiotics in improving gastrointestinal symptoms and overall quality of life in colorectal cancer patients post-surgery, which could influence postoperative care protocols.

Limitations:
  • The trial's findings may not be generalizable beyond the German clinical setting due to specific healthcare practices.
  • Potential variability in patient responses to synbiotics and the influence of concurrent treatments may introduce confounding factors.
Conclusion:

The LEONORA trial is expected to contribute significantly to understanding the role of synbiotics in postoperative care for colorectal cancer patients, potentially shaping future research and clinical practices.

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