Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal CancerPhase 1/2NCT05609370
A Study Investigating the Efficacy and Safety of Alcestobart (LBL-007) Plus Tislelizumab in Combination With Bevacizumab Plus Fluoropyrimidine Versus Bevacizumab Plus Fluoropyrimidine in Participants With Unresectable or Metastatic Colorectal Cancer
A Phase 1/2 study testing Alcestobart, Tislelizumab and Bevacizumab or Bevacizumab biosimilar in people with Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer, run by BeiGene at 64 sites in 4 countries.
Trial summary
This is a Phase 1b/2 study to investigate the efficacy and safety of alcestobart (LBL-007) plus tislelizumab when administered in combination with bevacizumab plus fluoropyrimidine, and alcestobart in combination with bevacizumab plus fluoropyrimidine versus bevacizumab plus fluoropyrimidine to participants with… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer
- What is being tested?
- Alcestobart, Tislelizumab and Bevacizumab or Bevacizumab biosimilar
- Type of treatment
- Pill or oral medicine, Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 113 participants
- Where
- 64 sitesin 4 countries
- Study dates
- 29 Jan 2023to 31 Dec 2026
- Phase
- Phase 1/2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Participant must have measurable disease as defined per RECIST((Response Evaluation Criteria in Solid Tumors) version 1.1
- Has a histologically confirmed colorectal adenocarcinoma with metastatic or unresectable disease (Stage IV as defined by American Joint Committee on Cancer [AJCC] 8th edition)
- No prior systemic therapy for colorectal cancer (CRC) in the metastatic setting except for the induction treatment of first-line therapy. Note: Local regional treatment performed during induction systemic treatment is allowed
- Participants who have completed the first-line induction treatment, with an overall response of stable disease or better. The duration of induction treatment should be completed within approximately 6 months. The first dose of study treatment needs to occur within 2 weeks (for 2-week regimen) or 3 weeks (for 3-week regimen) to 6 weeks after Day 1 of the last cycle of induction therapy
Who cannot join
- Participants whose disease has become resectable at the investigator's discretion during or after induction treatment are not eligible
- Progressive disease occurred less than 6 months from completion of any prior neoadjuvant therapy (ie, chemotherapy with or without radiotherapy) or adjuvant therapy (ie, chemotherapy with or without radiotherapy), whichever occurred later
- Participants who have been treated with anti-epidermal growth factor receptor (EGFR) antibody in the induction treatment
- Any prior therapy targeting T-cell stimulation or checkpoint pathways
- Participants with B-raf proto-oncogene, serine/threonine kinase (BRAF)V600E mutations
- Have locally or centrally confirmed microsatellite instability-high (MSI-H) by polymerase chain reaction (PCR) method or dMMR by immunohistochemistry (IHC) method
- Note: Other protocol defined criteria may apply.
Trial locations and contacts
64 sites in 4 countries.
64 sites in 4 countries
United States30 sites
University of New Mexico Comprehensive Cancer Center
Albuquerque, New Mexico, 87102-4517
Alaska Oncology and Hematology, Llc
Anchorage, Alaska, 99508-2974
St Vincent Frontier Cancer Center
Billings, Montana, 59102-6746
Helios Clinical Research
Cerritos, California, 90703
Pontchartrain Cancer Center
Covington, Louisiana, 70433-7512
Ut Southwestern Medical Center
Dallas, Texas, 75390-7208
Duke Cancer Center
Durham, North Carolina, 27710-2000
Virginia Cancer Specialists
Fairfax, Virginia, 22031-2171
Fort Wayne Medical Oncology and Hematology
Fort Wayne, Indiana, 46804
Banner Md Anderson Cancer Center
Gilbert, Arizona, 85234-2165
Baptist Md Anderson Cancer Center
Jacksonville, Florida, 32207-8432
University of Tennessee Medical Center
Knoxville, Tennessee, 37920-1511
Comprehensive Cancer Centers of Nevada
Las Vegas, Nevada, 89169-3321
Baptist Health Lexington
Lexington, Kentucky, 40503-1466
University of Kentucky Markey Cancer Center
Lexington, Kentucky, 40536-7001
Valkyrie Clinical Trials
Los Angeles, California, 90067-2011
Usc Norris Comprehensive Cancer Center (Nccc)
Los Angeles, California, 90089-1019
UCLA Hematologyoncology
Los Angeles, California, 90095-3075
Norton Cancer Institute
Louisville, Kentucky, 40217-1395
Perlmutter Cancer Center At Winthrop Oncology Hematology Associatesnyu Winthrop Hospital
Mineola, New York, 11501-3957
Ochsner Clinic Foundation
New Orleans, Louisiana, 70121-2429
Laura and Isaac Perlmutter Cancer Center At Nyu Langone Health
New York, New York, 10016-2708
Columbia University Medical Center
New York, New York, 10032
Hoag Memorial Presbyterian
Newport Beach, California, 92663-4162
Cancer Care Specialists
Reno, Nevada, 89511-2250
Ut Health San Antonio Mays Cancer Center
San Antonio, Texas, 78229-4427
Cancer Care Northwest
Spokane Valley, Washington, 99216-1020
Washington University School of Medicine
St Louis, Missouri, 63110-1010
Multicare Health System Institute For Research and Innovation
Tacoma, Washington, 98405
Kaiser Permanente Northern California
Vallejo, California, 94589-2441
China24 sites
Peking University First Hospital
Beijing, Beijing Municipality, 100034
Beijing Tsinghua Changgung Hospital
Beijing, Beijing Municipality, 102218
The First Hospital of Jilin University
Changchun, Jilin, 130021
Hunan Cancer Hospital
Changsha, Hunan, 410013
Fujian Medical University Union Hospital
Fuzhou, Fujian, 350001
Zhujiang Hospital of Southern Medical University
Guangzhou, Guangdong, 510000
The Second Affiliated Hospital of Zhejiang University School of Medicine
Hangzhou, Zhejiang, 310009
The Second Hospital of Anhui Medical University
Hefei, Anhui, 230601
Shandong Cancer Hospital
Jinan, Shandong, 250117
Jining No1 Peoples Hospital West Branch
Jining, Shandong, 272000
Karamay Central Hospital of Xinjiang
Karamay, Xinjiang, 834009
Linyi Peoples Hospital
Linyi, Shandong, 276000
Nantong First Peoples Hospital
Nantong, Jiangsu, 215124
Quanzhou First Affliated Hospital of Fujian Medical University
Quanzhou, Fujian, 362000
Renji Hospital Shanghai Jiao Tong University School of Medicine
Shanghai, Shanghai Municipality, 200000
Shanghai East Hospital Branch Hospital
Shanghai, Shanghai Municipality, 200123
The First Affiliated Hospital of Shantou University Medical College
Shantou, Guangdong, 515041
Shanxi Provincial Cancer Hospital
Taiyuan, Shanxi, 030013
Tianjin Medical University Cancer Institute and Hospital
Tianjin, Tianjin Municipality, 300060
Tianjin Union Medical Center (Nankai University Affiliated Hospital)
Tianjin, Tianjin Municipality, 300121
The Xinjiang Uygur Autonomous Region Peoples Hospital
Ürümqi, Xinjiang, 830001
Hubei Cancer Hospital
Wuhan, Hubei, 430079
The First Affiliated Hospital of Xiamen University
Xiamen, Fujian, 361003
Henan Cancer Hospital
Zhengzhou, Henan, 450000
Australia9 sites
Pindara Private Hospital
Benowa, Queensland, QLD 4217
Blacktown Cancer and Haematology Centre
Blacktown, New South Wales, NSW 2148
Monash Health
Clayton, Victoria, VIC 3168
The Alfred Hospital
Melbourne, Victoria, VIC 3004
St John of God, Murdoch
Murdoch, Western Australia, WA 6150
One Clinical Research
Nedlands, Western Australia, WA 6009
Orange Health Service (Central West Cancer Care Centre)
Orange, New South Wales, NSW 2800
Riverina Cancer Care Centre
Wagga Wagga, New South Wales, NSW 2650
Calvary Mater Newcastle
Waratah, New South Wales, NSW 2298
About this study
Official title: A Phase 1b/2, Randomized, Open-Label Study Investigating the Efficacy and Safety of LBL-007 Plus Tislelizumab in Combination With Bevacizumab Plus Fluoropyrimidine Versus Bevacizumab Plus Fluoropyrimidine as Maintenance Therapy in Patients With Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer
This is a Phase 1b/2 study to investigate the efficacy and safety of alcestobart (LBL-007) plus tislelizumab when administered in combination with bevacizumab plus fluoropyrimidine, and alcestobart in combination with bevacizumab plus fluoropyrimidine versus bevacizumab plus fluoropyrimidine to participants with colorectal cancer.
- Conditions
- Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer
- Being tested
- Alcestobart, Tislelizumab, Bevacizumab or Bevacizumab biosimilar, Fluoropyrimidine (FP)
- Keywords
- Colorectal Cancer, Microsatellite Stable, Mismatch Repair Proficient, Maintenance Therapy
- Medical subject headings
- Colorectal Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AlcestobartDrug
Also called LBL-007
Administered intravenously (IV) at one of the following doses
- Low dose: 150 mg once every 3 weeks
- Medium dose: 300 mg once every 3 weeks or 200 mg once every 2 weeks
- High dose: 600 mg once every 3 weeks or 400 mg once every 2 weeks
TislelizumabDrug
Also called BGB-A317
Administered intravenously at a dose of either 200 mg once every 3 weeks or 300 mg once every 4 weeks.
Bevacizumab or Bevacizumab biosimilarDrug
Administered intravenously at a dose of either 7.5 mg/kg once every 3 weeks or 5 mg/kg once every 2 weeks.
Fluoropyrimidine (FP)Drug
Fluoropyrimidine treatment included one of the following:
- Capecitabine 850 mg/m^2 administered orally twice daily for the first 2 weeks of each 3-week cycle,
OR
- 5-fluorouracil (5-FU) 1600 to 2400 mg/m^2 continuous infusion over 46 to 48 hours in combination with leucovorin or levoleucovorin (LV) IV administered per local guidelines and/or prescribing information once every 2 weeks.
| Study group | Role | What they receive |
|---|---|---|
| Phase 1b: Alcestobart Low Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine | Experimental | Participants received alcestobart low dose, tislelizumab, bevacizumab and capecitabine until disease progression, unacceptable toxicity, or withdrawal of consent. Receives: Drug: Alcestobart; Drug: Tislelizumab; Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 1b: Alcestobart Medium Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine | Experimental | Participants received alcestobart medium dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Alcestobart; Drug: Tislelizumab; Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 1b: Alcestobart High Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine | Experimental | Participants received alcestobart high dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent.
The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Alcestobart; Drug: Tislelizumab; Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 2: Arm A:PD-L1-positive: Alcestobart High Dose +Tislelizumab + Bevacizumab +Fluoropyrimidine | Experimental | PD-L1 (programmed cell death protein ligand-1)-positive participants received alcestobart high dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Alcestobart; Drug: Tislelizumab; Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 2: Arm B: PD-L1-positive: Alcestobart High Dose + Bevacizumab + Fluoropyrimidine | Experimental | PD-L1-positive participants received alcestobart high dose, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Alcestobart; Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 2: Arm C: PD-L1-positive: Bevacizumab + Fluoropyrimidine | Active comparator | PD-L1-positive participants received bevacizumab and fluoropyrimidine in combination with leucovorin or levoleucovorin (LV) until disease progression, unacceptable toxicity, or withdrawal of consent.
The bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 2: Arm D: PD-L1-negative: Alcestobart High Dose+ Tislelizumab+ Bevacizumab+ Fluoropyrimidine | Experimental | PD-L1-negative participants received alcestobart high dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Alcestobart; Drug: Tislelizumab; Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
| Phase 2: Arm E: PD-L1-negative: Bevacizumab + Fluoropyrimidine | Active comparator | PD-L1-negative participants received bevacizumab and fluoropyrimidine in combination with LV until disease progression, unacceptable toxicity, or withdrawal of consent.
The bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). Receives: Drug: Bevacizumab or Bevacizumab biosimilar; Drug: Fluoropyrimidine (FP) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Phase 1b: Number of Participants With Treatment-emergent Adverse Events (AEs) and Serious AEs (SAEs)
An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatments, whether considered related to study treatments or not. A serious AE (SAE) was any untoward medical occurrence that, at any dose-
- resulted in death,
- was life threatening,
- required hospitalization or prolongation of existing hospitalization,
- resulted in disability/incapacity,
- was a congenital anomaly/birth defect.
Measured: From first dose of study drug up to 30 days after last dose; maximum time on treatment was 16.2 months.
Phase 2: Progression Free Survival (PFS) as Assessed by The Investigator in PD-L1 Positive Arms A and C
PFS, as assessed by the investigator per RECIST v1.1 is defined as the time from the date of randomization to the date of first documentation of disease progression or death, whichever occured first.
Measured: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm A, 11.0 months, Arm C, 8.0 months)
Secondary outcomes (6)
Phase 2: Objective Response Rate (ORR) as Assessed by The Investigator in PD-L1 Positive Arms A and C
ORR is defined as the percentage of participants with a confirmed complete response (CR) or partial response (PR) from the time of randomization. CR and PR were confirmed per RECIST v1.1.
- CR: Disappearance of all target lesions. Any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to < 10 mm.
- PR: At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Measured: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm A, 11.0 months, Arm C, 8.0 months)
Phase 2: Duration of Response (DOR) as Assessed by The Investigator in PD-L1 Positive Arms A and C
DOR is defined as the time from the first determination of an objective confirmed response after randomization until the first documentation of disease progression or death, whichever comes first.
Measured: From first documented response until disease progression or death (maximum follow-up time for DOR was 4.2 months)
Phase 2: Progression Free Survival (PFS) as Assessed by The Investigator in PD-L1 Negative Arms D and E
PFS, as assessed by the investigator per RECIST v1.1 is defined as the time from the date of randomization to the date of first documentation of disease progression or death, whichever occurs first.
Measured: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm D, 10.6 months, Arm E, 10.5 months)
Phase 2: Objective Response Rate (ORR) as Assessed by The Investigator in PD-L1 Negative Arms D and E
ORR is defined as the proportion of participants with a confirmed complete response (CR) or partial response (PR) from the time of randomization. CR and PR were confirmed per RECIST v1.1.
- CR: Disappearance of all target lesions. Any pathological lymph nodes (whether target or nontarget) must have reduction in short axis to < 10 mm.
- PR: At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.
Measured: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm D, 10.6 months, Arm E, 10.5 months))
Phase 2: Duration of Response (DOR) as Assessed by The Investigator in PD-L1 Negative Arms D and E
DOR, defined as the time from the first confirmed objective response after randomization until the first documentation of disease progression or death, whichever comes first.
Measured: From first documented response until disease progression or death (maximum follow-up time for DOR was 2.8 months)
Phase 2: Number of Participants With Treatment-emergent AEs and SAEs
An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatments, whether considered related to study treatments or not. A serious AE (SAE) was any untoward medical occurrence that, at any dose-
- resulted in death,
- was life threatening,
- required hospitalization or prolongation of existing hospitalization,
- resulted in disability/incapacity,
- was a congenital anomaly/birth defect.
Measured: From first dose of study drug up to 30 days after last dose; maximum time on treatment in Phase 2 was 10.9 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Nov 2022
- Study start29 Jan 2023
- Primary completion23 May 2025
- Study completion31 Dec 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal CancerStudies of the same condition, open and under way.
- More trials run by BeiGeneThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1/2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 113 participants (actual)
Sponsor and investigators
- Lead sponsor
- BeiGene
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
- Investigators
- Study Director, Study director, BeiGene
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05609370
- Sponsor's protocol ID
- BGB-A317-LBL-007-201
- Other IDs
- CTR20223077
- Status last verified
- Jul 2026
- First submitted
- 20 Oct 2022
- Last updated
- 23 Jul 2026
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: BeiGene shares data on completed studies responsibly and provides qualified scientific and medical researchers access to data and supporting documentation for clinical trials in dossiers for medicines and indications after submission and approval in the United States, China, and Europe. Clinical trials supporting subsequent local approvals, new indications, or combination products are eligible for sharing once corresponding regulatory approvals are achieved. BeiGene shares data only when permitted by applicable data privacy and security laws and regulations, when it is feasible to do so without compromising the privacy of study participants, and other considerations. Qualified researchers with appropriate competencies who are engaged in novel scientific research may submit a request for participant-level data with a research proposal for BeiGene review. Research teams must include a biostatistician and sign a Data Sharing Agreement prior to receiving access to clinical trial data.
Study at a glance
From the registry record, last updated by the sponsor on 23 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1b/2, Randomized, Open-Label Study Investigating the Efficacy and Safety of LBL-007 Plus Tislelizumab in Combination With Bevacizumab Plus Fluoropyrimidine Versus Bevacizumab Plus Fluoropyrimidine as Maintenance Therapy in Patients With Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer
- ClinicalTrials.gov ID
- NCT05609370
- Acronym / sponsor ID
- BGB-A317-LBL-007-201
- Conditions
- Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer
- Keywords
- Colorectal Cancer, Microsatellite Stable, Mismatch Repair Proficient, Maintenance Therapy
- Phase
- Phase 1/2
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 113 participants (actual)
- Lead sponsor
- BeiGeneIndustry (pharma, biotech, devices)
- Study start
- 29 Jan 2023 (actual)
- Primary completion
- 23 May 2025 (actual)
- Study completion
- 31 Dec 2026 (estimated)
- First posted
- 8 Nov 2022 (actual)
- Results
- Posted 30 Jun 2026
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is a Phase 1b/2 study to investigate the efficacy and safety of alcestobart (LBL-007) plus tislelizumab when administered in combination with bevacizumab plus fluoropyrimidine, and alcestobart in combination with bevacizumab plus fluoropyrimidine versus bevacizumab plus fluoropyrimidine to participants with colorectal cancer.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 8
| Arm | Type | Receives |
|---|---|---|
| Phase 1b: Alcestobart Low Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine | Experimental | Drug: Alcestobart, Drug: Tislelizumab, Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)Participants received alcestobart low dose, tislelizumab, bevacizumab and capecitabine until disease progression, unacceptable toxicity, or withdrawal of consent. |
| Phase 1b: Alcestobart Medium Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine | Experimental | Drug: Alcestobart, Drug: Tislelizumab, Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)Participants received alcestobart medium dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
| Phase 1b: Alcestobart High Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine | Experimental | Drug: Alcestobart, Drug: Tislelizumab, Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)Participants received alcestobart high dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
| Phase 2: Arm A:PD-L1-positive: Alcestobart High Dose +Tislelizumab + Bevacizumab +Fluoropyrimidine | Experimental | Drug: Alcestobart, Drug: Tislelizumab, Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)PD-L1 (programmed cell death protein ligand-1)-positive participants received alcestobart high dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
| Phase 2: Arm B: PD-L1-positive: Alcestobart High Dose + Bevacizumab + Fluoropyrimidine | Experimental | Drug: Alcestobart, Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)PD-L1-positive participants received alcestobart high dose, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
| Phase 2: Arm C: PD-L1-positive: Bevacizumab + Fluoropyrimidine | Active comparator | Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)PD-L1-positive participants received bevacizumab and fluoropyrimidine in combination with leucovorin or levoleucovorin (LV) until disease progression, unacceptable toxicity, or withdrawal of consent. The bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
| Phase 2: Arm D: PD-L1-negative: Alcestobart High Dose+ Tislelizumab+ Bevacizumab+ Fluoropyrimidine | Experimental | Drug: Alcestobart, Drug: Tislelizumab, Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)PD-L1-negative participants received alcestobart high dose, tislelizumab, bevacizumab and fluoropyrimidine until disease progression, unacceptable toxicity, or withdrawal of consent. The alcestobart, tislelizumab, and bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
| Phase 2: Arm E: PD-L1-negative: Bevacizumab + Fluoropyrimidine | Active comparator | Drug: Bevacizumab or Bevacizumab biosimilar, Drug: Fluoropyrimidine (FP)PD-L1-negative participants received bevacizumab and fluoropyrimidine in combination with LV until disease progression, unacceptable toxicity, or withdrawal of consent. The bevacizumab dosing frequency was based on the selected fluoropyrimidine regimen (5-FU/LV 2-week regimen or capecitabine 3-week regimen). |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Participant must have measurable disease as defined per RECIST((Response Evaluation Criteria in Solid Tumors) version 1.1
- Has a histologically confirmed colorectal adenocarcinoma with metastatic or unresectable disease (Stage IV as defined by American Joint Committee on Cancer [AJCC] 8th edition)
- No prior systemic therapy for colorectal cancer (CRC) in the metastatic setting except for the induction treatment of first-line therapy. Note: Local regional treatment performed during induction systemic treatment is allowed
- Participants who have completed the first-line induction treatment, with an overall response of stable disease or better. The duration of induction treatment should be completed within approximately 6 months. The first dose of study treatment needs to occur within 2 weeks (for 2-week regimen) or 3 weeks (for 3-week regimen) to 6 weeks after Day 1 of the last cycle of induction therapy
Key exclusion criteria (7 listed)
- Participants whose disease has become resectable at the investigator's discretion during or after induction treatment are not eligible
- Progressive disease occurred less than 6 months from completion of any prior neoadjuvant therapy (ie, chemotherapy with or without radiotherapy) or adjuvant therapy (ie, chemotherapy with or without radiotherapy), whichever occurred later
- Participants who have been treated with anti-epidermal growth factor receptor (EGFR) antibody in the induction treatment
- Any prior therapy targeting T-cell stimulation or checkpoint pathways
- Participants with B-raf proto-oncogene, serine/threonine kinase (BRAF)V600E mutations
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| AlcestobartAlso: LBL-007Administered intravenously (IV) at one of the following doses * Low dose: 150 mg once every 3 weeks * Medium dose: 300 mg once every 3 weeks or 200 mg once every 2 weeks * High dose: 600 mg once every 3 weeks or 400 mg once every 2 weeks | Drug | Phase 1b: Alcestobart High Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Low Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Medium Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 2: Arm A:PD-L1-positive: Alcestobart High Dose +Tislelizumab + Bevacizumab +Fluoropyrimidine, Phase 2: Arm B: PD-L1-positive: Alcestobart High Dose + Bevacizumab + Fluoropyrimidine, Phase 2: Arm D: PD-L1-negative: Alcestobart High Dose+ Tislelizumab+ Bevacizumab+ Fluoropyrimidine |
| TislelizumabAlso: BGB-A317Administered intravenously at a dose of either 200 mg once every 3 weeks or 300 mg once every 4 weeks. | Drug | Phase 1b: Alcestobart High Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Low Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Medium Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 2: Arm A:PD-L1-positive: Alcestobart High Dose +Tislelizumab + Bevacizumab +Fluoropyrimidine, Phase 2: Arm D: PD-L1-negative: Alcestobart High Dose+ Tislelizumab+ Bevacizumab+ Fluoropyrimidine |
| Bevacizumab or Bevacizumab biosimilarAdministered intravenously at a dose of either 7.5 mg/kg once every 3 weeks or 5 mg/kg once every 2 weeks. | Drug | Phase 1b: Alcestobart High Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Low Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Medium Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 2: Arm A:PD-L1-positive: Alcestobart High Dose +Tislelizumab + Bevacizumab +Fluoropyrimidine, Phase 2: Arm B: PD-L1-positive: Alcestobart High Dose + Bevacizumab + Fluoropyrimidine, Phase 2: Arm C: PD-L1-positive: Bevacizumab + Fluoropyrimidine, Phase 2: Arm D: PD-L1-negative: Alcestobart High Dose+ Tislelizumab+ Bevacizumab+ Fluoropyrimidine, Phase 2: Arm E: PD-L1-negative: Bevacizumab + Fluoropyrimidine |
| Fluoropyrimidine (FP)Fluoropyrimidine treatment included one of the following: - Capecitabine 850 mg/m^2 administered orally twice daily for the first 2 weeks of each 3-week cycle, OR - 5-fluorouracil (5-FU) 1600 to 2400 mg/m^2 continuous infusion over 46 to 48 hours in combination with leucovorin or levoleucovorin (LV) IV administered per local guidelines and/or prescribing information once every 2 weeks. | Drug | Phase 1b: Alcestobart High Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Low Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 1b: Alcestobart Medium Dose + Tislelizumab + Bevacizumab + Fluoropyrimidine, Phase 2: Arm A:PD-L1-positive: Alcestobart High Dose +Tislelizumab + Bevacizumab +Fluoropyrimidine, Phase 2: Arm B: PD-L1-positive: Alcestobart High Dose + Bevacizumab + Fluoropyrimidine, Phase 2: Arm C: PD-L1-positive: Bevacizumab + Fluoropyrimidine, Phase 2: Arm D: PD-L1-negative: Alcestobart High Dose+ Tislelizumab+ Bevacizumab+ Fluoropyrimidine, Phase 2: Arm E: PD-L1-negative: Bevacizumab + Fluoropyrimidine |
Primary outcome
Phase 1b: Number of Participants With Treatment-emergent Adverse Events (AEs) and Serious AEs (SAEs)
Time frame: From first dose of study drug up to 30 days after last dose; maximum time on treatment was 16.2 months.
An AE is defined as any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of study treatments, whether considered related to study treatments or not. A serious AE (SAE) was any untoward medical occurrence that, at any dose- * resulted in death, * was life threatening, * required hospitalization or prolongation of existing hospitalization, * resulted in disability/incapacity, * was a congenital anomaly/birth defect.
Phase 2: Progression Free Survival (PFS) as Assessed by The Investigator in PD-L1 Positive Arms A and C
Time frame: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm A, 11.0 months, Arm C, 8.0 months)
PFS, as assessed by the investigator per RECIST v1.1 is defined as the time from the date of randomization to the date of first documentation of disease progression or death, whichever occured first.
6 secondary outcomes
Phase 2: Objective Response Rate (ORR) as Assessed by The Investigator in PD-L1 Positive Arms A and C
Time frame: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm A, 11.0 months, Arm C, 8.0 months)
Phase 2: Duration of Response (DOR) as Assessed by The Investigator in PD-L1 Positive Arms A and C
Time frame: From first documented response until disease progression or death (maximum follow-up time for DOR was 4.2 months)
Phase 2: Progression Free Survival (PFS) as Assessed by The Investigator in PD-L1 Negative Arms D and E
Time frame: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm D, 10.6 months, Arm E, 10.5 months)
Phase 2: Objective Response Rate (ORR) as Assessed by The Investigator in PD-L1 Negative Arms D and E
Time frame: From randomization until disease progression, death, study discontinuation, or data cutoff, whichever occurred first (maximum follow-up time: Arm D, 10.6 months, Arm E, 10.5 months))
Phase 2: Duration of Response (DOR) as Assessed by The Investigator in PD-L1 Negative Arms D and E
Time frame: From first documented response until disease progression or death (maximum follow-up time for DOR was 2.8 months)
Phase 2: Number of Participants With Treatment-emergent AEs and SAEs
Time frame: From first dose of study drug up to 30 days after last dose; maximum time on treatment in Phase 2 was 10.9 months
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 23 Jul 2026.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Individual participant dataSharing planned: Yes. BeiGene shares data on completed studies responsibly and provides qualified scientific and medical researchers access to data and supporting documentation for clinical trials in dossiers for medicines and indications after submission and approval in the United States, China, and Europe. Clinical trials supporting subsequent local approvals, new indications, or combination products are eligible for sharing once corresponding regulatory approvals are achieved. BeiGene shares data only when permitted by applicable data privacy and security laws and regulations, when it is feasible to do so without compromising the privacy of study participants, and other considerations. Qualified researchers with appropriate competencies who are engaged in novel scientific research may submit a request for participant-level data with a research proposal for BeiGene review. Research teams must include a biostatistician and sign a Data Sharing Agreement prior to receiving access to clinical trial data.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Study Director study director
BeiGene
64 sites in 4 countries: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1/2 study testing Alcestobart, Tislelizumab and Bevacizumab or Bevacizumab biosimilar in people with Unresectable or Metastatic Microsatellite Stable/Mismatch Repair Proficient Colorectal Cancer, run by BeiGene at 64 sites in 4 countries.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 23 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 64 sites in United States, China, Australia, Puerto Rico. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this combined phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 30 Jun 2026). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Phase 1b: Number of Participants With Treatment-emergent Adverse Events (AEs) and Serious AEs (SAEs) (time frame: From first dose of study drug up to 30 days after last dose; maximum time on treatment was 16.2 months.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 23 Jul 2026.