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Colorectal Cancer (Diagnosis)Phase 1/2NCT07244705

A Study of ABT-301 Plus Tislelizumab With Bevacizumab in pMMR/Non-MSI-H Locally Advanced or mCRC

A Phase 1/2 study testing ABT-301, Tislelizumab and Bevacizumab (Avastin) in people with Colorectal Cancer (Diagnosis) and Colorectal Cancer Metastatic, run by Anbogen Therapeutics, Inc. at 15 sites in 2 countries.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

The goal of this clinical trial is to evaluate the safety and tolerability of escalating doses of ABT-301 in combination with fixed doses of tislelizumab 200 mg IV infusion and bevacizumab 7.5 mg/kg IV infusion Q3W, in participants with pMMR/non-MSI-H colorectal cancer (CRC). Read more about this study

Who is it for?
Ages 18 years and older
What is being tested?
ABT-301, Tislelizumab and Bevacizumab (Avastin)
Could I receive a placebo?
No, everyone receives an active treatment
How many people
66 participants
Where
15 sitesin 2 countries
Study dates
Nov 2025to Jul 2028
Phase
Phase 1/2
Are there results?
Not yet: the study is under way

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 be ≥18 years at the time of signing the informed consent.
  • Participant with pMMR/non-MSI-H advanced/recurrent histologically confirmed CRC with at least one measurable lesion, per RECIST version 1.1.
  • Participant must have received ≥2 lines of prior systemic therapy (including but not limited to chemotherapeutic agents of 5-fluorouracil, oxaliplatin, irinotecan; participant may or may not have received biologic agents such as cetuximab, panitumumab, aflibercept, ramucirumab, bevacizumab; tyrosine kinase inhibitors of regorafenib, fruquintinib).
  • NOTE: Participants with BRAF V600E, HER2 amplification/ mutation, KRAS G12C mutation, NTRK gene fusion, RET fusion, may or may not have received relevant targeted therapy and failed.
  • Participant must submit an archival formalin-fixed, paraffin-embedded tumor specimen collected within 5 years before screening. If archival specimens are unavailable, alternative samples, such as colon endoscopy biopsy, are acceptable.
  • NOTE: For participants who consent to join the exploratory biomarker study, a fresh biopsy sample is required during the screening and treatment periods. Exceptions may be granted if tumor tissue cannot be obtained due to specific circumstances.
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  • Tumor tissues were identified as pMMR by immunohistochemistry (IHC) method or nonMSI-H by polymerase chain reaction (PCR) (Appendix 13).
  • ECOG Performance Status of 0 or 1.
  • Adequate hematologic and end-organ function, defined by laboratory data obtained within 7 days prior to the first dose of study intervention:
  • Absolute neutrophil count ≥1.5 × 109/L (1500/μL) without granulocyte colony-stimulating factor support.
  • Lymphocyte count >0.5 × 109/L (500/µL).
  • Platelet count >100 × 109/L (100,000/μL), without transfusion.
  • Hemoglobin >90 g/L (9 g/dL), participants may be transfused to meet this criterion.
  • AST, ALT, and ALP <2.5 × ULN (must be ≤5 × ULN for participants with liver metastases).
  • Total serum bilirubin <1.5 × ULN (<3 × ULN in the presence of documented Gilbert's syndrome [unconjugated hyperbilirubinemia] or liver metastases at baseline).
  • Creatinine clearance >60 mL/min.
  • Serum albumin ≥30 g/L (3 g/dL).
  • International normalized ratio (INR) or activated partial thromboplastic time (aPTT) <1.5 × ULN.
  • Urine dipstick for proteinuria ≤2+ (within seven days prior to the first dose of study intervention).
  • Resolution of any acute, clinically significant treatment-related toxicity from prior therapy to Grade ≤1 prior to study entry, with the exception of Grade ≤2 chemotherapy-related peripheral neuropathy or any Grade alopecia.
  • Participant must have a negative test for Hepatitis B surface antigen (HBsAg), Hepatitis C antibody, or human immunodeficiency virus (HIV) antibody.
  • NOTE: Participants with active hepatitis B virus (HBV) infection are eligible for the study if the following applies: HBV deoxyribonucleic acid (DNA) <500 IU/mL within 28 days prior to initiation of study intervention, and anti-HBV treatment (per local standard of care, e.g., entecavir) for a minimum of 14 days prior to study entry and willingness to continue treatment for the length of the study. Participants with positive hepatitis C virus (HCV) test are eligible for the study if they complete their antiviral therapy prior to study entry.
  • Contraceptive use by participants or participant partners must be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
  • NOTE: The reliability of sexual abstinence for male and/or female enrollment eligibility needs to be evaluated in relation to the duration of the clinical study and the preferred and usual lifestyle of the participant. Periodic abstinence (e.g., calendar, ovulation, symptothermal, or post ovulation methods) and withdrawal are not acceptable methods of contraception.
  • Male Participants:
  • A male participant must agree to use a highly effective contraception as detailed in Appendix 4 of this protocol during the intervention period and for at least 90 days after the last dose of study intervention and refrain from donating sperm during this period.
  • Female Participants:
  • A female participant is eligible to participate if she is not pregnant (see Appendix 4), not breastfeeding, and at least one of the following conditions applies:
  • o Not a CBP participant as defined in Appendix 4 and below: surgically sterile (documented hysterectomy, bilateral salpingectomy, or bilateral oophorectomy as confirmed by review of the participant's medical records, medical examination, or medical history interview), or postmenopausal (defined as no menses for 12 months) without an alternative medical cause with follicle-stimulating hormone (FSH) level in the postmenopausal range ≥1 year.
  • OR
  • o A CBP participant who agrees to follow the contraceptive guidance in Appendix 4 during the intervention period and for at least 180 days after the last dose of study intervention.
  • Participant is capable of giving signed informed consent as described in Appendix 1, Section 10.1.3 which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.

Who cannot join

  • History of leptomeningeal disease.
  • Active or history of autoimmune disease or immune deficiency, including, but not limited to, myasthenia gravis, myositis, autoimmune hepatitis, systemic lupus erythematosus, rheumatoid arthritis, psoriatic arthritis, inflammatory bowel disease, antiphospholipid antibody syndrome, Wegener granulomatosis, Sjögren syndrome, Guillain-Barré syndrome, multiple sclerosis, or ankylosing spondylitis.
  • EXCEPTIONS:
  • Participants with the following conditions are eligible for the study: autoimmune-related hypothyroidism on thyroid-replacement hormone are eligible for the study. Participants with controlled Type 1 diabetes mellitus who are on an insulin regimen are eligible for the study.
  • Participants with eczema, psoriasis, lichen simplex chronicus, or vitiligo with dermatologic manifestations only (e.g., participants with psoriatic arthritis are excluded) are eligible for the study provided all of following conditions are met: 1. Rash must cover <10% of body surface area 2. Disease is well controlled at baseline and requires only low-potency topical corticosteroids 3. No occurrence of acute exacerbations of the underlying condition requiring psoralen plus ultraviolet A radiation, methotrexate, retinoids, biologic agents, oral calcineurin inhibitors, or high-potency or oral corticosteroids within the previous 12 months.
  • History of idiopathic pulmonary fibrosis, organizing pneumonia (e.g., bronchiolitis obliterans), drug-induced pneumonitis, or idiopathic pneumonitis, or evidence of active pneumonitis on screening chest computed tomography (CT) scan.
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  • EXCEPTIONS:
  • o History of radiation pneumonitis in the radiation field (fibrosis) is permitted.
  • Active tuberculosis.
  • Significant cardiovascular disease (such as New York Heart Association Class II or greater cardiac disease, myocardial infarction, or cerebrovascular accident) within three months prior to initiation of study intervention, unstable arrhythmia, or unstable angina.
  • NOTE: Participants are not eligible for the study if they have or are
  • A marked baseline prolongation of QT/QTc interval (e.g., repeated demonstration of a QTc interval >450 milliseconds).
  • A history of additional risk factors for torsades de pointes (e.g., heart failure, hypokalemia, family history of Long QT Syndrome).
  • Using concomitant medications that prolong the QT/QTc interval. - Major surgical procedure, other than for diagnosis, within four weeks prior to initiation of study intervention, or anticipation of need for a major surgical procedure during the study.
  • History of malignancy other than CRC within five years prior to screening.
  • EXCEPTIONS:
  • o Participants with malignancies with a negligible risk of metastasis or death (e.g., 5-year OS rate >90%), such as adequately treated carcinoma in situ of the cervix, non-melanoma skin carcinoma, localized prostate cancer, ductal carcinoma in situ, or Stage I uterine cancer, are eligible for the study.
  • Severe infection within four weeks prior to initiation of study intervention, including, but not limited to, hospitalization for complications of infection, bacteremia, or severe pneumonia.
  • Any other disease, metabolic dysfunction, physical examination finding, or clinical laboratory finding that contraindicates the use of an investigational drug, may affect the interpretation of the results, or may render the participant at high risk from treatment complications.
  • History of severe allergic anaphylactic reactions to chimeric or humanized antibodies or fusion proteins.
  • Known hypersensitivity to Chinese hamster ovary cell products or to any component of the tislelizumab or bevacizumab formulation.
  • Participant is breastfeeding, has a positive serum pregnancy test at the Screening Visit, or is planning to become pregnant during the study intervention or within at least 120 days after the last dose of study intervention.
  • Symptomatic, untreated, or actively progressing CNS metastases.
  • NOTE: Asymptomatic participants with treated CNS lesions are eligible, provided that all of the following criteria are met:
  • Measurable disease, per RECIST version 1.1.
  • Must be present outside the CNS.
  • The participant has no history of intracranial hemorrhage or spinal cord hemorrhage.
  • There is no evidence of interim progression between completion of CNS-directed therapy and initiation of study intervention.
  • The participant has not undergone stereotactic radiotherapy within seven days prior to initiation of study intervention, whole brain radiotherapy within 14 days prior to initiation of study intervention, neurosurgical resection within 28 days prior to initiation of study intervention.
  • The participant has no ongoing requirement for corticosteroids as therapy for CNS disease.
  • NOTE: Anticonvulsant therapy at a stable dose is permitted. Asymptomatic participants with CNS metastases newly detected at screening are eligible for the study after receiving radiotherapy or surgery, with no need to repeat the screening brain scan.
  • Uncontrolled tumor-related pain:
  • <!-- -->
  • Participants requiring pain medication must be on a stable regimen at study entry.
  • Symptomatic lesions (e.g., bone metastases or metastases causing nerve impingement) amenable to palliative radiotherapy should be treated prior to enrollment. Participants should recover from the effects of radiation. There is no required minimum recovery period.
  • Asymptomatic metastatic lesions that would likely cause functional deficits or intractable pain with further growth (e.g., epidural metastasis that is not currently associated with spinal cord compression) should be considered for loco-regional therapy if appropriate prior to enrollment.
  • Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures (once monthly or more frequently).
  • Treatment with any investigational therapy within 28 days prior to initiation of study intervention.
  • Treatment with the following pharmaceutical or herbal agents within 14 days prior to initiation of study intervention:
  • <!-- -->
  • Known to be moderate or strong inhibitors or inducers of CYP3A4 (Appendix 9).
  • Known to be sensitive or narrow therapeutic index substrates of CYP3A4, CYP2C8, CYP2C9, or CYP2C19 (Appendix 10).
  • Prior treatment with any immunotherapy agent, including CD137 agonists or immune checkpoint blockade therapies (such as anti-cytotoxic T-lymphocyte-associated antigen-4 [anti-CTLA-4], anti-PD-1, and anti-PD-L1 therapeutic antibodies) and has experienced disease progression.
  • Treatment with systemic immunosuppressive medication (including, but not limited to, corticosteroids, cyclophosphamide, azathioprine, methotrexate, thalidomide, and antitumor necrosis factor agents) within two weeks prior to initiation of study intervention, or anticipation of need for systemic immunosuppressive medication during study intervention.
  • NOTE: Participants who received acute, low-dose systemic immunosuppressant medication or a one-time pulse dose of systemic immunosuppressant medication (e.g., 48 hours of corticosteroids for a contrast allergy) are eligible for the study after Medical Monitor approval has been obtained.
  • Inadequately controlled arterial hypertension (defined as systolic blood pressure >150 mmHg and/or diastolic blood pressure >100 mmHg), based on an average of three blood pressure readings on two sessions.
  • NOTE: Anti-hypertensive therapy to achieve these parameters is allowable.
  • Prior history of hypertensive crisis or hypertensive encephalopathy.
  • Significant vascular disease (e.g., aortic aneurysm requiring surgical repair or recent peripheral arterial thrombosis) within six months prior to initiation of study intervention.
  • History of hemoptysis (>2.5 mL of bright red blood per episode) within one month prior to initiation of study intervention.
  • Evidence of bleeding diathesis or significant coagulopathy (in the absence of therapeutic anticoagulation).
  • Current or recent (within ten days of first dose of study intervention) use of aspirin (>325 mg/day) or treatment with dipyridamole, ticlopidine, clopidogrel, and cilostazol.
  • Current or recent (within ten days prior to initiation of study intervention) use of full dose oral or parenteral anticoagulants or thrombolytic agents for therapeutic (as opposed to prophylactic) purpose.
  • NOTE: Allowable direct oral anticoagulants for prophylaxis include apixaban, edoxaban, rivaroxaban, and dabigatran. Participants should not be on any other anticoagulant for prophylaxis. Participants taking vitamin K antagonists, such as warfarin, are not eligible for the study.
  • Core biopsy or other minor surgical procedure, excluding placement of a vascular access device, within three days prior to the first dose of study intervention.
  • History of abdominal or tracheoesophageal fistula, GI perforation, or intra-abdominal abscess within six months prior to initiation of study intervention.
  • History of intestinal obstruction and/or clinical signs or symptoms of GI obstruction including sub-occlusive disease-related to the underlying disease or requirement for routine parenteral hydration, parenteral nutrition, or tube feeding within six months prior to initiation of study intervention.
  • NOTE: Participants with signs/symptoms of sub-/occlusive syndrome/intestinal obstruction at time of initial diagnosis may be enrolled if they had received definitive (surgical) treatment for symptom resolution.
  • Evidence of abdominal free air that is not explained by paracentesis or recent surgical procedure.
  • Serious, non-healing or dehiscing wound, active ulcer, or untreated bone fracture.
  • Metastatic disease that involves major airways or blood vessels or centrally located mediastinal tumor masses (<30 mm from the carina) of large volume.
  • History of intra-abdominal inflammatory process within 6 months prior to initiation of study intervention, including but not limited to peptic ulcer disease, diverticulitis, or colitis.
  • Curative radiotherapy within 28 days and abdominal/pelvic radiotherapy within 60 days prior to initiation of study intervention, except palliative radiotherapy to bone lesions within seven days prior to initiation of study intervention.
  • Major surgical procedure, open biopsy, or significant traumatic injury within 28 days prior to initiation of study intervention, or abdominal surgery, abdominal interventions or significant abdominal traumatic injury within 60 days prior to initiation of study intervention or anticipation of need for major surgical procedure during the course of the study or non-recovery from side effects of any such procedure.
  • Chronic daily treatment with a non-steroidal anti-inflammatory drug (NSAID). NOTE: Occasional use of NSAIDs for the symptomatic relief of medical conditions such as headache or fever is allowed. If the Investigator has specific considerations regarding the use of NSAIDs for pain management, it should be discussed with the Sponsor on a case-by-case basis.
  • Participant cannot swallow oral medications or have a GI illness that may clinically significantly affect the absorption of ABT-301 (e.g., chronic diarrhea with malabsorption).

Trial locations and contacts

15 sites in 2 countries. Contact the study team or a site near you to ask about taking part.

Ryan Hua contact

+886-2-8979-8616

abt301-103@anbogen.com

15 sites in 2 countries

Australia8 sites, 8 recruiting

  • Monash University - Faculty of Medicine, Nursing and Health Sciences

    Clayton, Victoria, 3800

    Not yet recruiting

  • Greenslopes Private Hospital - Cyril Gilbert Cancer Centre

    Greenslopes, Queensland, 4120

    Not yet recruiting

  • Austin Health - Cancer Clinical Trials Centre (CCTC)

    Heidelberg, Victoria, 3084

    Not yet recruiting

  • Liverpool Cancer Therapy Centre

    Liverpool, New South Wales, 2170

    Not yet recruiting

  • Macquarie University Hospital (MUH)

    Macquarie Park, New South Wales, 2109

    Not yet recruiting

  • Linear Clinical Research

    Nedlands, Western Australia, 6009

    Not yet recruiting

  • Scientia Clinical Research

    Randwick, New South Wales, 2031

    Recruiting

  • The Queen Elizabeth Hospital (TQEH)

    Woodville South, South Australia, 5011

    Not yet recruiting

Other trials in Australia

Taiwan7 sites, 7 recruiting

  • Kaohsiung Medical University Chung-Ho Memorial Hospital

    Kaohsiung City, 807

    Not yet recruiting

  • E-Da Cancer Hospital

    Kaohsiung City, 824

    Not yet recruiting

  • Chang Gung Medical Foundation, Kaohsiung Chang Gung Memorial Hospital

    Kaohsiung City, 833

    Not yet recruiting

  • Taipei Medical University Shuang Ho Hospital, Ministry of Health and Welfare

    New Taipei City, 235

    Not yet recruiting

  • National Cheng Kung University Hospital

    Tainan, 701

    Not yet recruiting

  • National Taiwan University Hospital - Cancer Center

    Taipei, 100

    Not yet recruiting

  • Chang Gung Medical Foundation, Linkou Chang Gung Memorial Hospital

    Taoyuan, 333

    Not yet recruiting

Other trials in Taiwan

About this study

Official title: An Open-label, Multicenter, Phase 1/2 Study Exploring the Safety and Efficacy of ABT-301 in Combination With Tislelizumab and Bevacizumab in Participants With Proficient Mismatch Repair (pMMR)/Non-Microsatellite Instability-High (Non-MSI-H) Locally Advanced or Metastatic Colorectal Cancer (mCRC)

The goal of this clinical trial is to evaluate the safety and tolerability of escalating doses of ABT-301 in combination with fixed doses of tislelizumab 200 mg IV infusion and bevacizumab 7.5 mg/kg IV infusion Q3W, in participants with pMMR/non-MSI-H colorectal cancer (CRC). It will also determine the maximum tolerated dose (MTD) and select the recommended Phase 2 dose (RP2D) of ABT-301.

Participants will receive ABT-301 administered once daily (QD ±3 hours) or twice daily (Q12H ±3 hours, at least 9 hours apart) with water in 21-day treatment cycles. Tislelizumab 200 mg IV and bevacizumab 7.5 mg/kg IV Q3W will be given in both parts of the study.

Being tested
ABT-301, Tislelizumab, Bevacizumab (Avastin)
Medical subject headings
Colorectal Neoplasms, Disease

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • ABT-301Drug

    Also called MPT0E028, Imofinostat

    ABT-301 is an oral histone deacetylase inhibitor (HDACi) administered in capsule form once daily (QD ±3 hours) or every 12 hours (Q12H ±3 hours, with at least 9 hours between doses) with water in 21-day treatment cycles.

    In Part 1 (dose-escalation phase), participants receive escalating doses of ABT-301 (50 mg QD, 100 mg QD, 50 mg Q12H, 150 mg QD, or 75 mg Q12H). Tislelizumab 200 mg and bevacizumab 7.5 mg/kg will be administered through IV infusion on Day 1 of every 21-day treatment cycle. This phase aims to determine the maximum tolerated dose (MTD) and/or recommended Phase 2 dose (RP2D) of ABT-301 when combined with tislelizumab and bevacizumab.

    In Part 2 (dose-optimization phase), two ABT-301 doses/schedules will be selected for further evaluation of antitumor activity, safety, and tolerability in adults with pMMR/non-MSI-H colorectal cancer (CRC).

  • TislelizumabDrug

    Tislelizumab is a humanized immunoglobulin G4-variant monoclonal antibody (mAb) blocking programmed cell death protein 1 (PD-1). Tislelizumab 200 mg will be administered through IV infusion on Day 1 of every 21-day treatment cycle in combination with ABT-301 and bevacizumab throughout both parts of the study.

  • Bevacizumab (Avastin)Drug

    Bevacizumab (Avastin®) is a recombinant humanized monoclonal IgG1 antibody which binds to and neutralizes VEGF. Neutralization of VEGF by bevacizumab has been shown to inhibit the VEGF-induced proliferation of human endothelial cells in vitro and to decrease micro-vessel density and interstitial pressure in tumor xenografts in vivo. Bevacizumab 7.5 mg/kg will be administered through IV infusion on Day 1 of every 21-day treatment cycle in combination with ABT-301 and tislelizumab, throughout both parts of the study.

Study groups in NCT07244705
Study groupRoleWhat they receive
Part 1 (Dose Escalation Phase)ExperimentalNot described
Receives: Drug: ABT-301; Drug: Tislelizumab; Drug: Bevacizumab (Avastin)
Part 2 (Dose Optimization Phase)ExperimentalNot described
Receives: Drug: ABT-301; Drug: Tislelizumab; Drug: Bevacizumab (Avastin)

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Part I - To evaluate the safety and tolerability of escalating doses of ABT-301 in combination with fixed doses of tislelizumab 200 mg IV infusion and bevacizumab 7.5 mg/kg IV infusion Q3W, in participants with pMMR/non-MSI-H CRC.

    Endpoints include:

    Adverse Event will be graded using the NCI CTCAE V5.0.

    Measured: From screening to 90 days after last dose

  2. Part I - To determine the Maximum tolerated dose (MTD) and select the recommended Phase 2 dose (RP2D) of ABT-301.

    Endpoints include:

    Incidence of DLTs during the first cycle of treatment.

    Measured: From the first dose of ABT-301 to the completion of the first 21-day cycle of ABT-301 treatment in the last cohort.

  3. Part II - To evaluate the efficacy of two dosages/schemes of ABT-301 in combination with tislelizumab and bevacizumab.

    Endpoint:

    ORR per Investigator assessment, according to RECIST version 1.1.

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

Secondary outcomes (18)

  1. Part I - Objective Response Rate (ORR) per Investigator Assessment According to RECIST v1.1

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

  2. Part I - Duration of Response (DOR) per Investigator Assessment According to RECIST v1.1

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

  3. Part I - Progression-Free Survival (PFS) per Investigator Assessment According to RECIST v1.1

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

  4. Part I - Overall Survival (OS)

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

  5. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Maximum Plasma Concentration (Cmax) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  6. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Time to Reach Maximum Plasma Concentration (Tmax) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  7. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Area under the plasma concentration time curve from time zero to the time of the last quantifiable concentration (AUC₀-last) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  8. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Area Under the Plasma Concentration-Time Curve Over the Dosing Interval (AUC₀-τ) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  9. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Terminal Half-Life (t½) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  10. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Apparent Clearance (CL/F) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  11. Part I - To characterize the PK of repeated doses of ABT-301 in participants with pMMR/non-MSI-H CRC.

    Apparent Volume of Distribution (Vz/F) of ABT-301

    Measured: From Cycle 1 Day 1 through Cycle 2 Day 1 (each cycle is 21 days)

  12. Part II - To evaluate the safety and tolerability of ABT-301 in combination with tislelizumab and bevacizumab.

    Endpoints include:

    Adverse Event will be graded using the NCI CTCAE V5.0.

    Measured: From screening to 90 days after last dose

  13. Part II - Objective Response Rate (ORR) per Investigator Assessment According to RECIST v1.1

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

  14. Part II - Duration of Response (DOR) per Investigator Assessment According to RECIST v1.1

    Measured: From baseline until progression of disease or death, whichever occurs first. (up to 28 months)

  15. Part II - Progression-Free Survival (PFS) per Investigator Assessment According to RECIST v1.1

    Measured: From baseline until disease progression or death, whichever occurs first. (up to 28 months)

  16. Part II - Overall Survival (OS)

    Measured: From baseline until disease progression or death, whichever occurs first. (up to 28 months)

  17. Part II - To evaluate the PK of ABT-301 in steady state.

    Trough plasma concentration of ABT-301 in steady state and through plasma concentration of ABT-301 at specified timepoints.

    Measured: From Cycle 1 Day 1 through the last Cycle Day 2 (each cycle is 21 days)

  18. Part II - To evaluate the PD of ABT-301 in steady state.

    Level of AcH3 in PBMCs before and after treatment.

    Measured: From Cycle 1 Day 1 through the last Cycle Day 2 (each cycle is 21 days)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 Nov 2025
  2. Study startNov 2025 (estimated)
  3. Primary completionApr 2028 (estimated)
  4. Study completionJul 2028 (estimated)

Resources

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
Sequential
Masking
None (open label)
Enrolment
66 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07244705
Sponsor's protocol ID
ABT-301-103
Status last verified
Nov 2025
First submitted
10 Nov 2025
Last updated
24 Nov 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Undecided

Questions about this trial

What is this clinical trial studying?

A Phase 1/2 study testing ABT-301, Tislelizumab and Bevacizumab (Avastin) in people with Colorectal Cancer (Diagnosis) and Colorectal Cancer Metastatic, run by Anbogen Therapeutics, Inc. at 15 sites in 2 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 32 inclusion and 66 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: looking for participants now, as of the sponsor's last update on 24 Nov 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 15 sites in Australia, Taiwan. 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?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Ryan Hua (+886-2-8979-8616, abt301-103@anbogen.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Part I - To evaluate the safety and tolerability of escalating doses of ABT-301 in combination with fixed doses of tislelizumab 200 mg IV infusion and bevacizumab 7.5 mg/kg IV infusion Q3W, in participants with pMMR/non-MSI-H CRC. (time frame: From screening to 90 days after last dose). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07244705.

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 24 Nov 2025.

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