FMT+ QL1706+Bevacizumab+ XELOX as First-line Treatment for Advanced MSS-type Colon Cancer With Liver Metastasis

Fecal Microbiota Transplantation Combined With QL1706, Bevacizumab, and XELOX as First-line Treatment for Advanced MSS-type Colon Cancer With Liver Metastasis: A Prospective, Multi-center, Single-arm Phase II Study

The investigators plan to initiate a prospective, multicenter, phase II study, recruiting 30 patients with advanced colon cancer patients with liver metastasis who have not received prior treatment. This study plans to reconstruct intestinal microecology through fecal microbiota transplantation (FMT), and combine with QL1706+Bevacizumab+XELOX to enhance the anti-tumor immune effect at the same time, thereby improving the prognosis of colon cancer patients with liver metastasis.

Study Overview

• Status: Recruiting
• Conditions: Colon Cancer Liver Metastases
• Intervention / Treatment: Combination product: FMT+QL1706+Bevacizumab+XELOX

Detailed Description

This is a prospective, single-arm, multi-center, exploratory clinical study. Patients with previously untreated, newly diagnosed advanced colon cancer with liver metastasis, who could be diagnosed by histological or cytological means, ECOG PS 0-1, excluded Ras, Raf wild type left colon and rectum, excluded dMMR/MSI-H. Eligible subjects who met the inclusion criteria were screened and signed informed consent.

FMT was performed 2 days before treatment with QL1706, bevacizumab, and chemotherapy. QL1706， bevacizumab, and chemotherapy (XELOX) were administered every 3 weeks according to the patient's body surface area. A total of 6 cycles were performed. Subsequent maintenance therapy was at the discretion of the investigator.

RECIST v1.1 was used for tumor evaluation every 6 weeks during treatment. NCI-CTCAE 5.0 was used for safety assessment every 3 weeks. Adverse events were recorded throughout the study to 90 days after the end of treatment. Treatment continues until disease progression, subject withdraws informed consent, loss of follow-up, or death. Patients should provide 10ml whole blood samples and fecal samples at baseline, after two cycles of treatment, after four cycles of treatment, before maintenance treatment for the detection of efficacy prediction markers (each cycle is 21 days).

• Study Type: Interventional
• Enrollment (Estimated): 30
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Hua Jiang MD; Phone Number: +86-18015852711; Email: czeyjh@njmu.edu.cn

Study Locations

• China
  • Changzhou, China
    • Recruiting
    • The Second People's Hospital of Changzhou
    • Contact: Hua Jiang MD; Phone Number: +86-18015852711

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Histological or cytological confirmed advanced colon cancer with liver metastasis.
2. Signed written informed consent.
3. Have not received anti-tumor treatment.
4. According to the investigators assessment, at least one measurable target lesion defined by RECIST v1.1.
5. Patients of both sexes, aged ≥18 years and ≤75 years.
6. ECOG PS 0-1;
7. Expected survival time ≥ 3 months;
8. Have adequate organ and bone marrow function, laboratory examination within 7 days prior to enrollment meets the following requirements, as follows:

1) Blood routine: ANC ≥ 1.5 × 10^9/L, Platelet count ≥ 100 × 10^9/L, HGB ≥100 g/L (no blood transfusion or erythropoietin dependence within 14 days); 2) Liver function: TBIL ≤1.5 x ULN; ALT/AST ≤ 5 x ULN; ALP ≤5×ULN; 3) Renal function: Cr ≤1.5×ULN, or creatinine clearance ≥50 mL/min: Urine routine results showed urinary protein < 2+; 4) Coagulation function: INR or PT ≤1.5 x ULN. 9.For female subjects of reproductive age, a urine or serum pregnancy test should be performed and the result is negative 3 days prior to receiving the initial study drug administration.

10. For women of childbearing potential (WOCBP): agreement to refrain from heterosexual intercourse or use contraception.

11. For men: agreement to refrain from heterosexual intercourse or use a condom, and agreement to refrain from donating sperm.

Exclusion Criteria:

1. Suffered from other malignancies in the past 5 years, excluding cured basal cell carcinoma of the skin, cervical carcinoma in situ and papillary thyroid carcinoma.
2. Patients requiring elective surgery during the trial.
3. Patients who cannot take oral drugs, or have conditions that the investigator determines to significantly affect gastrointestinal absorption, such as chronic diarrhea, intestinal obstruction, etc., and are not suitable for treatment.
4. Patients during pregnancy (positive pregnancy test) or lactation.
5. Central nervous system metastasis or meningeal metastasis.
6. Uncontrollable bone metastasis, or patients at risk of fracture, requiring surgery, local radiation therapy.
7. Patients with active infection requiring systemic anti-infection treatment.
8. Patients with a history of immunodeficiency, including those who are positive for HIV antibody tests.
9. Patients with known, active autoimmune diseases.
10. Patients with uncontrolled active hepatitis B, patients with hepatitis C virus infection (HCV antibody positive).
11. A history of severe cardiovascular and cerebrovascular diseases, including but not limited to: severe arrhythmia, acute coronary syndrome within 6 months, congestive heart failure, aortic dissection, stroke, and T IA history.
12. Severe bleeding events occur within half a year, or high bleeding risk factors such as active digestive tract ulcers and esophageal and gastric varices due to liver cirrhosis.
13. Patients with diabetes who cannot be stably controlled by drugs (including insulin).
14. Mental or language disorders that prevent communication with the patient;
15. Patients participating in another clinical trial.
16. MSI-H/ d MMR without immunotherapy; left colorectum of Ras, Raf wild-type.
17. The investigator believes that the subject has other serious systemic diseases or other conditions that make him unsuitable for participation in this trial.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: FMT+QL1706+Bevacizumab+XELOX	Combination product: FMT+QL1706+Bevacizumab+XELOX; Participants will receive FMT combined with QL1706+Bevacizumab+XELOX for 6 cycles. If there is no progression of the disease after 6 cycles of the first-line treatment, then patients will enter the maintenance treatment stage. The therapy of maintenance treatment stage was at the discretion of the investigator.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective Response Rate (ORR)	Objective response rate will be assessed by investigators.	up to 24 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
12-Months Progression-Free Survival Rate (12month-PFS)	The proportion of patients whose disease did not progress 12 months after treatment	up to 12 months
Median Progression-Free Survival (mPFS)	Observation for mPFS will be recorded until the end of follow-up after the start of 1st cycle of treatment.	up to 24 months
Incidence of Adverse events (AEs)	Therapy-related adverse events will be recorded and assessed according to the National Cancer Institute's Common Terminology Criteria for Adverse Events (CTCAE, Version 5.0).	up to 24 months
The Diversity of Fecal Microbiota	This will be detected by 16s rRNA sequencing or metagenomes.	up to 24 months
Median Overall Survival (mOS)	The time from the first treatment to death from any cause.	up to 24 months
6-Months Progression-Free Survival Rate (6month-PFS)	The proportion of patients whose disease did not progress 6 months after treatment	up to 6 months
18-Months Progression-Free Survival Rate (18month-PFS)	The proportion of patients whose disease did not progress 18 months after treatment	up to 18 months
6-Months overall survival rate(6-Months-OS Rate)	The proportion of patients who have not died after 6-Months of treatment	up to 6 months
12-Months overall survival rate(12-Months-OS Rate)	The proportion of patients whose disease did not progress 12 months after treatment	up to 12 months
18-Months overall survival rate(18-Monthsr-OS Rate)	The proportion of patients who have not died after 18 months of treatment	up to 18 months
Objective Response Rate (ORR) of liver metastases	Objective response rate will be assessed by investigators.	up to 24 months
Disease Control Rate (DCR)	The proportion of patients whose tumors achieve a response (CR+PR) and stable disease (SD) after treatment for the minimum duration required.	up to 24 months
Surgical conversion rate	Proportion of inoperable patients converted to operable.	up to 24 months
Quality of Life (QoL)	QoL(quality of life) will be evaluated by EORTC-QLQ-C30.The total score ranges from 0 to 60, with higher scores indicating better quality of life	up to 24 months

Collaborators and Investigators

• Sponsor: Hua Jiang

Study record dates

Study Major Dates

• Study Start (Actual): April 17, 2025
• Primary Completion (Estimated): February 1, 2027
• Study Completion (Estimated): February 1, 2027

Study Registration Dates

• First Submitted: January 25, 2025
• First Submitted That Met QC Criteria: January 25, 2025
• First Posted (Actual): January 30, 2025

Study Record Updates

• Last Update Posted (Estimated): January 2, 2026
• Last Update Submitted That Met QC Criteria: December 28, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Neoplasms by Site; Neoplasms; Intestinal Diseases; Gastrointestinal Neoplasms; Digestive System Neoplasms; Digestive System Diseases; Gastrointestinal Diseases; Colorectal Neoplasms; Intestinal Neoplasms; Liver Diseases; Colonic Diseases; Neoplastic Processes; Colonic Neoplasms; Neoplasm Metastasis; Liver Neoplasms; Antineoplastic Agents, Immunological; Antineoplastic Agents; Physiological Effects of Drugs; Angiogenesis Inhibitors; Angiogenesis Modulating Agents; Growth Substances; Growth Inhibitors; Bevacizumab
• Other Study ID Numbers: [2024]YLJSA162

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