Systemic Neoadjuvant and Adjuvant Control by Precision Medicine in Rectal Cancer (SYNCOPE)

March 3, 2023 updated by: Toni Seppala, Helsinki University Central Hospital

Systemic Neoadjuvant and Adjuvant Control by Precision Medicine in Rectal Cancer (SYNCOPE) - Approach on High-risk Group to Reduce Metastases

Rectal cancer represents the most complex area of multidisciplinary treatment in bowel surgery. In 2017, there were 1221 new rectal cancers in Finland. The prognosis of colorectal cancer (CRC) patients these days is almost exclusively driven by the occurrence of the metastatic form of the disease.

The treatment of rectal cancer often includes a long delay between diagnosis and the initiation of systemic chemotherapy, increasing risk for systemic metastases for those at high risk. On the other hand, the waiting time during pretreatment before surgery enables comprehensive systematic characterization of the primary tumor status before the decisions on adjuvant chemotherapy, opening a window to the use of precision in decision-making.

In this randomized controlled treatment trial, outcomes of novel precision methods to select right rectal cancer patients for treatment that they need will be compared to conventional treatment. The study aims to reduce over-treatment of those that most likely do not benefit from additional treatments. With the overall aim to reduce metastatic form of the disease, patients with high-risk features will be randomized to a treatment strategy with early systemic control by chemotherapy followed by circulating tumor DNA (ctDNA) and organoid-guided adjuvant therapy, or to conventional treatment strategy. Both state-of-the-art laboratory practice and routine diagnostic clinical pipelines are introduced to bring future diagnostic models of minimal residual disease and chemoresistance closer to current practice. The outcomes will reveal the clinical benefit of such strategy by recurrence-free survival at highest level of evidence, and produce important clinical outcome data on the application of ctDNA in everyday cancer treatment practice. The translational data on the use of ctDNA organoids to inform treatment decision and regimen selection will build knowledge of the use of such biomarkers as tools for clinical practice and clinical research. The results will be scalable worldwide in the practice of rectal cancer treatment.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

93

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

      • Tampere, Finland, 33520
        • Recruiting
        • Tampere University Hospital
        • Contact:
    • Uusimaa
      • Helsinki, Uusimaa, Finland, 00029
        • Recruiting
        • Helsinki University Central Hospital
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 100 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. rectal adenocarcinoma,
  2. World Health Organization (WHO) performance status 0-1, assessed by the MDT to be able to undergo capecitabine and oxaliplatin (CAPOX) treatment, 3) extramural vein invasion by magnetic resonance imaging (mrEMVI+) and

4) assessed by the multi-disciplinary team (MDT) to require either radiotherapy (RT) or long chemoradiotherapy (CRT) by the current standards.

Exclusion Criteria:

  1. deficient mismatch repair (MMR) status,
  2. non-dihydropyrimidine dehydrogenase (DPYD) genotype,
  3. a contraindication to capecitabine, oxaliplatin or RT, or
  4. failing in blood tests that describe the adequate circulatory, liver and kidney function for chemotherapy.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: TNT + precision
Short radiotherapy (5X5 Gy) and capecitabine/oxaliplatin
Postoperative MRD on circulating cell-free DNA
Active Comparator: Conventional
Long-course 50.4 Gy radiation with capecitabine

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Recurrence-free survival
Time Frame: 3 years from surgery
3 years from surgery
Recurrence-free survival
Time Frame: 5 years from surgery
5 years from surgery
Postoperative ctDNA
Time Frame: 3 weeks postoperatively
number of patients with detectable ctDNA at postoperative sample in the conventional treatment arm that are not assigned to chemotherapy
3 weeks postoperatively

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
overall survival
Time Frame: 5 years
5 years
overall survival
Time Frame: 3 years
3 years
CRC-specific survival
Time Frame: 3 years
3 years
CRC-specific survival
Time Frame: 5 years
5 years
number of surgically resected patients resected patients
Time Frame: 1 year
1 year
R0-resection rate
Time Frame: 1 year
1 year
local recurrence rate
Time Frame: 5 years postoperatively
5 years postoperatively
complete pathological response response rate
Time Frame: 12 weeks after initiation of pretreatment
12 weeks after initiation of pretreatment
complete clinical response rate
Time Frame: 12 weeks after initiation of pretreatment
12 weeks after initiation of pretreatment
total uptake of chemotherapy
Time Frame: 1year
1year
total uptake of chemotherapy
Time Frame: 3 years
3 years
total uptake of chemotherapy
Time Frame: 5 years
5 years
adverse effects of surgery effects of surgery
Time Frame: 1 year
1 year
adverse effects of chemotherapy
Time Frame: 1 year
1 year
adverse effects of chemotherapy
Time Frame: 3 years
3 years
Treatment response by patient-derived organoid (PDO) therapy response
Time Frame: 1 year
population distribution of PDO treatment response is compared to their corresponding clinical response by response MRI and pathological response and compared to organoid in vitro response
1 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Investigators

  • Principal Investigator: Toni T Seppälä, MD, PhD, Tampere University Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

December 20, 2021

Primary Completion (Anticipated)

August 31, 2028

Study Completion (Anticipated)

December 31, 2031

Study Registration Dates

First Submitted

February 8, 2021

First Submitted That Met QC Criteria

April 9, 2021

First Posted (Actual)

April 12, 2021

Study Record Updates

Last Update Posted (Estimate)

March 6, 2023

Last Update Submitted That Met QC Criteria

March 3, 2023

Last Verified

March 1, 2023

More Information

Terms related to this study

Other Study ID Numbers

  • HUS/155/2021

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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