Anti-CEA CAR-T Cells to Treat Colorectal Liver Metastases

A Clinical Study to Evaluate the Safety and Efficacy of Anti-CEA CAR-T Cells in the Treatment of Postoperative Minimal Residual Lesions in Colorectal Cancer Patients With Liver Metastases

Recurrence of liver metastasis in colorectal cancer after R0 resection is mainly due to the invisible minimal residual disease, which are the main factors leading to metastasis and recurrence. Positive circulating tumor DNA (ctDNA) is the direct evidence of the minimal residual disease (MRD). In recent years, Chimeric Antigen Receptor T-Cell Immunotherapy (CAR-T) has made great breakthroughs, and has achieved good therapeutic effects in hematological tumors, but the research on solid tumors is limited. CEA expression is generally elevated in gastrointestinal tumors and is associated with high aggressiveness of tumors. At present, solid tumor cell therapy targeting CEA has been carried out at home and abroad, and has achieved certain efficacy. Anti-CEA CAR-T cells targeting CEA have been constructed in the pre-clinical study of this project, and the pre-clinical study results suggest good safety and effectiveness. Formation of minimal residual disease is associated with circulating blood in the residual tumor cells. Using this feature, this project intends to conduct a phase I clinical study on patients with minimal residual disease /positive ctDNA after R0 resection of colorectal cancer liver metastasis, so as to conduct preliminary exploration of anti-CEA CAR-T cell therapy, evaluate the safety and effectiveness of the therapy, determine the maximum tolerated dose (MTD), and provide guidance for subsequent drug dosage and clinical trials.

Study Overview

• Status: Recruiting
• Conditions: Colorectal Cancer; Metastatic Liver Cancer
• Intervention / Treatment: Drug: Anti-CEA CAR-T Cells

• Study Type: Interventional
• Enrollment (Anticipated): 18
• Phase: Phase 1

Contacts and Locations

Study Locations

• China
  • Shanghai
    • Shanghai, Shanghai, China, 200433
      • Recruiting
      • Department of Colorectal Surgery in Changhai Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 75 years (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. ≥18 years old, ≤75 years old, male or female;
2. Patients diagnosed with liver metastasis of colorectal cancer underwent radical surgery for the primary lesion of colorectal cancer, and R0 resection was performed for the liver metastasis (R0 resection was required for other organ metastasis). There was no measurable disease or tumor remnants (except invisible or unmeasurable disease) were found by imaging examination after surgery;
3. Patients with CEA expression detected by immunohistochemistry in primary tumor and liver metastasis tumor tissues (CEA expression detected by pathology was more than 50%);
4. Life expectancy ≥6 months;
5. Performance status (PS) score 0-2, Karnofsky performance status (KPS) score above 60;
6. Patients with ctDNA MRD still positive or positive again after adjuvant chemotherapy (including preoperative neoadjuvant chemotherapy);
7. Important organ functions are sufficient, such as New York Heart Association (NYHA) heart function grade III or above, hemoglobin ≥90g/L, hypoxia; Liver function: total bilirubin ≤1.5×ULN (total bilirubin ≤3×ULN in liver metastasis), ALT≤2.5×ULN, AST≤2.5×ULN (ALT or/and AST≤5×ULN in liver metastasis); Renal function: serum creatinine ≤1.5×ULN and creatinine clearance rate ≥50 mL/min. The creatinine clearance rate was only calculated when serum creatinine ≤1.5×ULN. Minimum reserve of lung function (dyspnea no higher than grade 1 and oxygen saturation > 91% without oxygen);
8. Sufficient mononuclear cells (PBMC) can be obtained from peripheral veins without contraindications;
9. Patients of childbearing age had no birth plan within 1 year after cell infusion and took effective contraceptive measures.

Exclusion Criteria:

1. Have a history of severe central nervous system diseases;
2. Residual disease or tumor remnants can be seen in imaging, or tumor lesions cannot be resected in other tissues or organs;
3. The presence of serious non-malignant diseases, including autoimmune diseases, primary immunodeficiency diseases or obstructive or restrictive respiratory diseases;
4. Prior treatment with CAR-T or other gene-modified T cells;
5. Participated in other clinical studies within 30 days prior to screening or plan to participate in other clinical studies during the study period;
6. Patients with active Hepatitis B (HBV-DNA copy number >105copies/ml), active Hepatitis C (HCV-RNA copy number >ULN), HIV infection, treponema pallidum infection at screening time;
7. The existence of uncontrollable systemic infectious diseases;
8. Other multiple malignant tumors in addition to colorectal cancer and its metastasis;
9. Chinese herbal medicine, systemic glucocorticoids or other immunosuppressants may be required within 2 weeks prior to enrollment or during the trial period, which may negatively affect lymphocyte activity or number;
10. Pregnancy and lactation;
11. The existence of severe gastroduodenal ulcer, severe ulcerative colitis and other serious intestinal inflammation;
12. The existence of serious respiratory diseases;
13. Those who cannot provide enough white tablets for tumor pathology for next-generation sequencing (NGS) detection (at least 3 white tablets are expected);
14. The investigator judged that there were other conditions that were not suitable for the clinical study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: TREATMENT
• Allocation: NA
• Interventional Model: SINGLE_GROUP
• Masking: NONE

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

EXPERIMENTAL: MRD or positive ctDNA patients to inject anti-CEA CAR-T cells; Patients with liver metastasis of colorectal cancer after R0 surgery and adjuvant chemotherapy could not clear MRD (including patients with MRD still positive after the intermediate and final evaluation of adjuvant chemotherapy, and patients with MRD positive again after the end of adjuvant chemotherapy), and no measurable lesions or tumor remnants were found on imaging after surgery.

Drug: Anti-CEA CAR-T Cells; The study will evaluate the safety of intravenous infusion of anti-CEA CAR-T (+) cells in humans at doses of 1×10^6/kg, 3×10^6/kg, and 6×10^6/kg using a standard "3+3" design and preliminarily observe the efficacy.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Security (Incidence and severity of adverse events)	To evaluate the possible reatment related adverse events(TEAEs) occurred within the first 28 days after anti-CEA CAR-T infusion, including replicative lentiviruses(RCL), anti-drug antibody(ADA), and the incidence and severity of symptoms such as cytokine release syndrome(CRS) and CAR-T related encephalopathy syndrome(CRES).	Observation 28 days after CAR-T cells infusion
Effectiveness (minimal residual disease)	Recurrence by ctDNA MRD detection or imaging diagnosis	24 months after R0 resection
Efficacy (recurrence-free survival)	2-year recurrence-free survival rate based on imageological examination.	2 years after CAR-T cells infusion

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Pharmacokinetics (PK) indicator (Cmax)	The peak concentration of anti-CEA CAR-T cells amplified in the peripheral blood (Cmax, detected by flow cytometry and qPCR).	2 years after CAR-T cells infusion
Pharmacokinetics (PK) indicator (AUC)	The exposed quantity of anti-CEA CAR-T cells amplified in the peripheral blood(aera under the curve, AUC, detected by flow cytometry and qPCR).	2 years after CAR-T cells infusion

Collaborators and Investigators

• Sponsor: Changhai Hospital

Study record dates

Study Major Dates

• Study Start (ANTICIPATED): August 25, 2022
• Primary Completion (ANTICIPATED): December 25, 2023
• Study Completion (ANTICIPATED): December 25, 2026

Study Registration Dates

• First Submitted: December 26, 2021
• First Submitted That Met QC Criteria: February 13, 2022
• First Posted (ACTUAL): February 15, 2022

Study Record Updates

• Last Update Posted (ACTUAL): March 11, 2022
• Last Update Submitted That Met QC Criteria: March 9, 2022
• Last Verified: March 1, 2022

More Information

Terms related to this study

• Keywords: colorectal cancer; liver metastasis; CAR-T cell; minimal residue disease
• Additional Relevant MeSH Terms: Digestive System Diseases; Pathologic Processes; Neoplasms; Neoplasms by Site; Gastrointestinal Neoplasms; Digestive System Neoplasms; Gastrointestinal Diseases; Colonic Diseases; Intestinal Diseases; Intestinal Neoplasms; Rectal Diseases; Neoplastic Processes; Colorectal Neoplasms; Neoplasm Metastasis
• Other Study ID Numbers: CHCRS-CEA CAR-T

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No