A Study of TAK-102 in Adult With Previously-Treated Solid Tumors

An Open-Label, Dose Escalation, Phase 1, First-in-Human Study of TAK-102 in Adult Patients With GPC3-Expressing Previously Treated Solid Tumors

Some solid tumors make a lot of a protein called glypican 3(GPC3), which helps it to grow. Healthy cells and tissues do not make GPC3. TAK-102 is a medicine that sticks to GCP3 and stops it from working. It is hoped that TAK-102 will eventually treat people with solid tumors with the GPC3 protein. TAK-102 will be added to each person's white blood cells so is custom-made for each person.

In this study, people with solid tumors with GPC3 will receive TAK-102 with their white blood cells. The main aims of this study are to check if the participants get any side effects from treatment with TAK-102 and to check how much TAK-102 they can receive without getting side effects from it. Researchers can then work out the best dose of TAK-102 to give to participants in future studies.

At the first visit, the study doctor will check who can take part. For those who can take part, the study doctors will collect white blood cells from each participant. These cells are sent to the laboratory where TAK-102 is added to each participant's cells. This can take up to 4 weeks. Participants will receive specific treatments while they are waiting for TAK-102. Then, participants will receive TAK-102 with their cells slowly through a vein (infusion). 3 different small groups of participants will receive lower to higher doses of TAK-102. Each participant will just receive 1 dose. The study doctors will check for side effects after each different dose of TAK 102. In this way, researchers can work out the best dose of TAK-102 to give to participants in future studies.

Participants will stay in hospital for 28 days or longer for their treatment. Then, they will visit the clinic for regular check-ups for up to 36 months.

The drug being tested in this study is called TAK-102. TAK-102 is being tested to treat people who have GPC3-expressing previously treated solid tumors. This study will look at the safety and tolerability of TAK-102 and will determine the RP2D of TAK-102.

The study will enroll approximately 14 participants, with a maximum of 18 participants. Participants will be assigned to 1 of the 3 treatment groups (dose cohorts) and dose escalation will be conducted in this study:

• Cohort 1: 1 × 10^7 CAR (+) cells/body [starting dose].
• Cohort 2: 1 × 10^8 CAR (+) cells/body.
• Cohort 3: 1 × 10^9 CAR (+) cells/body.

In case Cohort 1 is not tolerable, the dose level will be de-escalated to Cohort -1: 3 × 10^6 CAR (+) cells/body. Dose level(s) between planned cohorts and/or other dosing schedules may also be tested.

This study consists of the Screening, Pretreatment, and Treatment and Primary Follow-up phases. In Treatment and Primary Follow-up phases, all participants will be asked to receive a single intravenous infusion of TAK-102 and administration of TAK-102 will continue up to Month 12.

This multi-center trial will be conducted in Japan. The overall time to participate in this study is up to 15 years (In general, the 12-month Treatment and Primary Follow-up, 2-year Secondary Follow-up and then 12-year Long Term Follow-up phases in another study). Participants will make multiple visits to the clinic and be hospitalized for at least 28 days to receive treatment with TAK-102 followed by a recovery period.

Inclusion Criteria:

1. Male or female participants aged ≥18 years at the time of signing informed consent.

2. Participants must have a diagnosis of solid tumors.

3. Participants with solid tumor who are refractory or intolerant to standard treatments.

4. GPC3-expression must be determined on the tumor locally by IHC using a validated assay, scoring and staining confirmed by the sponsor prior to leukapheresis procedures.

5. Life expectancy ≥12 weeks.

6. ECOG performance status of 0 or 1.

7. Adequate organ function as confirmed by clinical laboratory values as specified below:

   1. Total bilirubin must be <1.5 × the upper limit of the normal range (ULN). Total bilirubin may be elevated up to 3 × ULN if the elevation can be reasonably ascribed to the presence of metastatic disease in the liver.
   2. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) must be <3 × ULN. AST and ALT may be elevated up to 5 × ULN if the elevation can be reasonably ascribed to the presence of metastatic disease in liver.
   3. Calculated creatinine clearance >50 mL/mins (The Cockcroft-Gault formula).
   4. Hemoglobin must be ≥8 g/dL.
   5. Neutrophil count must be >1000/mm^3.
   6. Absolute lymphocyte count must be >500/mm^3.
   7. Platelet count must be >75,000/mm^3.
   8. Prothrombin time-international normalized ratio must be ≤1.7.
   9. Activated partial thromboplastin time (APTT) must be ≤1.5 × ULN.

8. Participants must have radiographically measurable disease as defined by RECIST 1.1.

9. Female participants who:

   1. Are postmenopausal (natural amenorrhea and not due to other medical reasons) for at least 1 year before the screening visit, OR
   2. Are surgically sterile, OR
   3. If they are of childbearing potential, agree to practice 1 highly effective nonhormonal method of contraception and 1 additional effective (barrier) method at the same time, from the time of signing the informed consent through at least 12 months following TAK-102 infusion, OR
   4. Agree to practice true abstinence, when this is in line with the preferred and usual lifestyle of the participant.

   Note: Periodic abstinence (eg, calendar, ovulation, symptothermal, postovulation methods), withdrawal, spermicides only, and lactational amenorrhea are not acceptable methods of contraception.

10. Male participants, even if surgically sterilized (ie, postvasectomy), who:

    1. Agree to practice effective barrier contraception from the time of signing the informed consent through at least 12 months following TAK-102 infusion, OR
    2. Agree to practice true abstinence, when this is in line with the preferred and usual lifestyle of the participant.

    Note: Periodic abstinence (eg, calendar, ovulation, symptothermal, postovulation methods), withdrawal, spermicides only, and lactational amenorrhea are not acceptable methods of contraception.

11. Voluntary written consent must be given before performance of any study-related procedures not part of standard medical care, with the understanding that consent may be withdrawn by the participant at any time without prejudice to future medical care.

12. Willingness and ability to comply with scheduled visits and study procedures.

Exclusion Criteria:

1. Active systemic infections excluding well-controlled chronic HBV/HCV infections, coagulation disorders, or other major medical illnesses including cardiovascular, respiratory or immune system, myocardial infarction, cardiac arrhythmias, and obstructive/restrictive pulmonary disease.
2. Participants with known cardiopulmonary disease defined as unstable angina, clinically significant arrhythmia, congestive heart failure. A well-controlled atrial fibrillation would not be an exclusion whereas uncontrolled atrial fibrillation would be an exclusion.
3. Any serious medical or psychiatric illness that could, in the investigator's opinion, potentially interfere with the completion of treatment according to this protocol.
4. Patients with any signs of lymphoma and/or leukemia
5. Patients who are diagnosed with or treated for another malignancy within 3 years before leukapheresis procedures. Patients with nonmelanoma skin cancer or carcinoma in situ (eg, cervix, bladder, breast) would be included if they were adequately treated.
6. Active, serious infection requiring antibiotics.
7. Any disease requiring systemic steroid treatment or steroid inhalant.
8. Any prior use of cell and gene therapy(ies).
9. Treatment with any investigational products (except for cell or gene therapy) within 14 days before leukapheresis procedures or 28 days before treatment with preconditioning chemotherapy/TAK-102.
10. Systemic anticancer therapy (including platinum-based chemotherapies and I/O therapies) within 14 days before leukapheresis procedures or treatment with preconditioning chemotherapy/TAK-102.
11. Treatment with radiotherapy within 14 days before leukapheresis procedures or treatment with preconditioning chemotherapy/TAK-102.
12. Treatment with major surgery within 28 days before leukapheresis procedures or treatment with preconditioning chemotherapy/TAK-102 (minor surgical procedures such as catheter placement are not exclusionary criteria).
13. Previous treatment with any GPC3-targeted therapy.
14. Any unresolved toxicity greater than Grade 2 from previous anticancer therapy.
15. Participants with risk of bleeding as judged by the investigator(s).
16. Presence of central nervous system (CNS) metastasis or other significant neurological conditions (participant with CNS metastases that have been effectively treated where necessary and stable can be enrolled).
17. Participants with medically diagnosed past or current hepatic encephalopathy.
18. Participants with positive human immunodeficiency virus (HIV) and/or human T-cell lymphotrophic virus (HTLV) infection.
19. Participants with clinically significant ascites, which is defined as ascites that are physically positive or require intervention (eg, puncture or medication) for control; those whose imaging result shows ascites requiring no intervention may be included.
20. Participants with a history of organ transplantation or awaiting organ transplantation.
21. Participants with severe immediate hypersensitivity to any of the agents including cyclophosphamide, fludarabine, ganciclovir, or streptomycin.
22. Admission or evidence of illicit drug use, drug abuse, or alcohol abuse.
23. Female participants who are lactating and breastfeeding or have a positive serum pregnancy test (urine pregnancy test is allowed before treatment with preconditioning chemotherapy and TAK-102).

Note: Female participants who are lactating will be eligible if they discontinue breastfeeding before the treatment with TAK-102.