Serplulimab Combined With CAPEOX + Celecoxib as Neoadjuvant Treatment for Locally Advanced Rectal Cancer

NCT05731726 | Recruiting Phase 2

• 1 other identifier: ASTRUM-REC01
• Study Type: interventional
• Target: 50
• Locations: 1 country
• Sites: 1

Brief Summary

Colorectal cancer of Mismatch Repair-proficient (pMMR)/ Microsatellite Stability (MSS) accounts for approximately 85% of all colorectal cancer patients, which might be insensitive to immunotherapy. Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Chemotherapy, such as CAPEOX regimen, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Celecoxib, a COX-2 inhibitor, can improve the immune microenvironment and have a potential to synergy with immunotherapy. Chemotherapy can improve the immunogenicity of cancer cells that might enhance the efficacy of immunotherapy. The aim of this study is to explore whether chemotherapy and cyclooxygenase (COX) inhibitors combined with anti-PD-1 monoclonal antibody (mAb) could improve efficacy for resectable colorectal cancer patient with the pMMR/MSS phenotype.

Conditions

MSI-L; pMMR; MSS; Locally Advanced Rectal Carcinoma

Keywords

Rectal cancer; Serplulimab; Celecoxib; CAPEOX; neoadjuvant therapy

Outcome Measures

Primary Outcomes (1)

• Pathological complete response rates

  Proportion of patients experiencing a pCR to perioperative PD-1 antibody

  1 year

Secondary Outcomes (7)

• Major pathological response rates

  1 year

• Rate of clinical complete response rate (cCR)

  1 year

• R0 resection rates

  1 year

• Treatment-related adverse events.

  1 year

• Detection of MRD

  1year

Study Arms (1)

Serplulimab+CAPEOX+celecoxib

EXPERIMENTAL

Participants will receive serplulimab 300 mg every 3 weeks (Q3W) concurrently with CAPEOX regimen: Oxaliplatin(130mg/m2) on day 1 of each cycle and Capecitabine, 1000mg/m2, PO, BID, day1-14, q3w and celecoxib, 200mg, PO, BID, day1-21, q3w. Treatment repeats every 3 weeks for 4-8 cycles followed by surgery (total mesorectal excision, TME).

Drug: Serplulimab; Drug: Capecitabine; Drug: Oxaliplatin; Drug: Celecoxib

Interventions

Capecitabine DRUG

Given PO

Also known as: Xeloda

Serplulimab+CAPEOX+celecoxib

Oxaliplatin DRUG

Given IV

Also known as: OHP

Serplulimab+CAPEOX+celecoxib

Celecoxib DRUG

celebrex

Also known as: Given PO

Serplulimab+CAPEOX+celecoxib

Serplulimab DRUG

Serplulimab is an innovative monoclonal antibody targeting PD-1, developed by Shanghai Henlius Biotech, Inc. 300 mg, q3w. For the timing of serplulimab, there is a subgroup developed, all enrolled patients will be divided into 2 subgroups in 1:1 ratio, the fasting group and the control group. For the fasting group patients, fasting starts from 8 p.m. the day before treatment and concludes at 12 p.m. on the treatment day, water is allowed. For the control group patients, they have meals according to their habits.

Also known as: HLX10

Serplulimab+CAPEOX+celecoxib

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Willing and able to provide written informed consent.
• Male or female subjects ≧ 18 years ≦ 75 of age.
• Histological or cytological documentation of adenocarcinoma of the rectum.
• No previous any systemic anticancer therapy for rectal cancer disease.
• The lower margin of the tumor is less than 10cm from the anus verge.
• cT2N1-2M0, cT3N0-2M0, cT4N0-2M0 MSS with MRF(-) assessed by MRI.
• Primary tumor can be detected by CT or MRI.
• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1.
• Eligible tumor tissues were identified for MSI/MMR assays.
• Hepatitis B Surface Antigen (HBsAg) (-).
• If HBsAg (+) , HBV-DNA must be less than 2500 copies/mL or 500 IU/mL to be enrolled.
• Patients with HCV antibody (-) or HCV-RNA negative can be enrolled. Aspartate aminotransferase (AST) must be ≤ 3 x ULN for the lab. If HCV-RNA is positive, patients with both alanine aminotransferase (ALT) and aspartate aminotransferase (AST) performed ≤3×ULN could be enrolled. Patients infected with both hepatitis B virus and hepatitis C virus should be excluded (positive for HBsAg or HBcAb and positive for HCV antibodies).

You may not qualify if:

• Patients with recurrent rectal cancer or a history of pelvic radiotherapy.
• Patients with a history of inflammatory bowel disease.
• Patients with acquired immunodeficiency syndrome (AIDS-related illnesses) or known human immunodeficiency virus (HIV) disease (HIV1 antibody, HIV2 antibody, HTLV1 antibody positive) should be excluded.
• Patients who are preparing for or have previously received an organ or bone marrow transplant.
• History of myocardial infarction, poorly controlled arrhythmias (including QTc interval ≥470 ms in women) in the 6 months prior to enrollment (QTc interval calculated by Fridericia formula).
• According to New York College of Cardiology (NYHA) standards for Grade III-IV cardiac insufficiency or cardiac color ultrasound: left ventricular ejection fraction (LVEF) \<50%.Poor hypertension control (systolic blood pressure ≥150 mmHg and/or diastolic blood pressure ≥100 mmHg), a past hypertensive crisis or hypertensive encephalopathy.
• Poor hypertension control (systolic blood pressure ≥150 mmHg and/or diastolic blood pressure ≥100 mmHg), a past hypertensive crisis or hypertensive encephalopathy.
• Patients had undergone major surgery within 28 days prior to enrollment. Patients with tumor biopsy or lymph node dissection biopsy were admitted. Patients undergoing enterostomy due to intestinal obstruction were admitted.
• The patients had previously been treated with other antibodies/drugs that target immune checkpoints, such as PD-1, PD-L1, and cytotoxic T lymphocyte-associated Antigen 4 (CTLA-4).
• Patients are participating in other clinical studies, or plan to start this study treatment less than 14 days from the end of the previous clinical study.
• Uncontrolled tumor-related pain.
• A known history of severe allergy to any monoclonal antibody.
• Known to be allergic or intolerance to any oxaliplatin and capecitabine ingredients.
• Pregnant or lactating women.
• The investigators determined that the patient had other factors that might have led to the early termination of the study.

Sponsors & Collaborators

• Zhejiang University: lead

Study Sites (1)

Second Affiliated Hospital School of Medicine Zhejiang University

Hangzhou, Zhejiang, 310000, China

RECRUITING

MeSH Terms

Conditions

Rectal Neoplasms

Interventions

Capecitabine; Oxaliplatin; Celecoxib

Condition Hierarchy (Ancestors)

Colorectal Neoplasms; Intestinal Neoplasms; Gastrointestinal Neoplasms; Digestive System Neoplasms; Neoplasms by Site; Neoplasms; Digestive System Diseases; Gastrointestinal Diseases; Intestinal Diseases; Rectal Diseases

Intervention Hierarchy (Ancestors)

Deoxycytidine; Cytidine; Pyrimidine Nucleosides; Pyrimidines; Heterocyclic Compounds, 1-Ring; Heterocyclic Compounds; Fluorouracil; Uracil; Pyrimidinones; Deoxyribonucleosides; Nucleosides; Nucleic Acids, Nucleotides, and Nucleosides; Coordination Complexes; Organic Chemicals; Benzenesulfonamides; Sulfonamides; Amides; Benzene Derivatives; Hydrocarbons, Aromatic; Hydrocarbons, Cyclic; Hydrocarbons; Sulfones; Sulfur Compounds; Pyrazoles; Azoles

Central Study Contacts

Kefeng Ding, doctor

CONTACT

+86 13588425440; dingkefeng@zju.edu.cn

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Professor

Study Record Dates

• First Submitted: February 7, 2023
• First Posted: February 16, 2023
• Study Start: February 22, 2023
• Primary Completion (Estimated): December 30, 2026
• Study Completion (Estimated): December 30, 2026
• Last Updated: March 5, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)