NCT04991480 - A Study of ART4215 for the Treatment of Advanced or Metastatic Solid Tumors | Crick

Eligibility

Sex: ALLMin age: 18 Years

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General Inclusion Criteria: * Signed informed consent * Discontinued all previous treatments for cancer for at least 21 days or 5 half-lives, whichever is shorter (except in Germany where local regulation requires the longer of 21 days or 5 half-lives washout), and recovered from the acute effects of therapy. Palliative radiotherapy must have completed 1 week prior to start of study treatment. * At least 1 radiologically evaluable lesion (measurable and/or non-measurable) that can be assessed at baseline and is suitable for repeated radiological evaluation by RECIST v1.1 or Prostate Cancer Working Group-3 (PCWG-3) for patients with prostate cancer * Acceptable hematologic, renal, hepatic, and coagulation functions independent of transfusions and granulocyte colony-stimulating factor * Willingness to abide by protocol defined contraceptive requirements for the duration of the study. * Estimated life expectancy of ≥12 weeks Additional inclusion criteria for participants in dose escalation (Part A1): * Advanced or metastatic cancer, which is refractory to standard therapies, or for which no standard therapies exist, or for which the investigator feels no other active therapy is required for the duration of the study * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis Additional inclusion criteria for participants in dose escalation (Part A2): * Advanced or metastatic cancer for which a PARP inhibitor is an appropriate treatment option. Participants may have received prior treatment with PARP inhibitor * Optional baseline biopsy for BRCA1/2 mutations and prior PARP inhibitor * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis Additional inclusion criteria for participants in dose escalation (Part A3): * Advanced or metastatic cancer for which a PARP inhibitor is an appropriate treatment option. Prior treatment with PARP inhibitor * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis Additional inclusion criteria for participants in dose expansion (Part B1): * Advanced or metastatic solid tumors that have undergone disease progression during treatment with a PARP inhibitor for an approved indication * At least 1 measurable lesion assessable using standard techniques by RECIST v1.1 or PCWG-3 guidelines * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis Additional inclusion criteria for participants in dose expansion (Part B2): * Advanced or metastatic cancer that is refractory to standard therapies, or for which no standard therapies exist, or for which the investigator feels no other active therapy is required for the duration of the study with characteristics indicative of sensitivity to pol theta inhibition * No prior treatment with a PARP inhibitor and must not have a disease for which there is an approved PARP inhibitor * At least 1 measurable lesion assessable using standard techniques by RECIST v1.1 or PCWG-3 guidelines * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis Additional inclusion criteria for participants in dose expansion (Part B3): * HER2-negative locally advanced or metastatic breast cancer * Deleterious or suspected deleterious germline or somatic BRCA1 or BRCA2 mutation * No more than 3 prior chemotherapy-inclusive regimens (including antibody conjugates) * Prior treatment with a taxane or anthracycline unless contraindicated * No or \</= 1 month of prior treatment with a PARP inhibitor * At least 1 measurable lesion assessable using standard techniques by RECIST v1.1 * Non-irradiated tumor tissue sample (archival or newly obtained core biopsy of a tumor lesion) available for submission for analysis General Exclusion Criteria: * Women who are pregnant, breast feeding, or who plan to become pregnant while in the study or within the protocol defined timeframe after the last administration of study specified treatment. * Men who plan to father a child while in the study or within the protocol defined timeframe after the last administration of study specified treatment. * Serious concomitant systemic disorder that would compromise the participants ability to adhere to the protocol including: opportunistic HIV/AIDs-related infection(s) within the past 12 months, hepatitis B virus, or hepatitis C virus; documented active or chronic tuberculosis infection; malignancy prior to the one currently being treated \[including myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML)\] that is not in remission * Have MDS/AML or features suggestive of MDS/AML * Ongoing interstitial lung disease or pneumonitis (whether symptomatic or asymptomatic) * Moderate or severe cardiovascular disease * Symptomatic or uncontrolled brain metastases, spinal cord compression, or leptomeningeal disease requiring concurrent treatment; stable brain metastases are eligible * Received a live vaccine within 30 days before the first dose of study treatment * History or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the study, interfere with the patient's participation for the full duration of the study, or is not in the best interest of the patient to participate * Recent major surgery within 4 weeks prior to entry into the study or minor surgery within 1 week of entry into the study * Significant bleeding disorder or vasculitis or had a Grade ≥3 bleeding episode within 12 weeks prior to enrollment * Currently enrolled in a clinical trial involving an investigational product or any other type of medical research judged not to be scientifically or medically compatible with this study Additional exclusion criteria for participants in dose expansion (Part B3): * First-line locally advanced and/or metastatic breast cancer with no prior adjuvant chemotherapy * Inflammatory breast cancer * Known hypersensitivity to any of the components of talazoparib * Prior treatment with a PARP inhibitor that was discontinued due to a treatment related toxicity. Additional exclusion criteria for participants in dose escalation (Part A3): • Hypersensitivity to any of the components of niraparib

Outcomes

Primary Outcomes

Part A: Number of participants with dose limiting toxicities (DLTs) from ART4215 monotherapy, in combination with talazoparib or in combination with niraparib

DLTs are defined as adverse events (graded according to NCI CTCAE v5.0) during Cycle 1 that are related to ART4215 monotherapy, in combination with talazoparib or in combination with niraparib

Time frame: 21 days (Cycle 1)

Part B1 and B2: Number of participants with adverse events following administration of ART4215

Number of adverse events as characterized by type, frequency, seriousness (graded according to NCI CTCAE v5.0) and relationship to ART4215

Time frame: From the first dose until up to 30 days after the last dose of ART4215. Each cycle is 21 days.

Part B3: Progression free survival (PFS) as a measure of efficacy for ART4215 in combination with talazoparib or talazoparib alone

PFS is defined as the time from the start of randomization until the earliest objective disease progression defined by RECIST v1.1 or death by any cause in the absence of progression.

Time frame: Every 6 weeks (±7 days) from date of randomization for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Secondary Outcomes

Part B3: Number of participants with adverse events following administration of ART4215 in combination with talazoparib

Number of adverse events as characterized by type, frequency, seriousness (graded according to NCI CTCAE v5.0) and relationship to ART4215 in combination with talazoparib

Time frame: From the first dose until up to 30 days after the last dose of ART4215. Each cycle is 21 days.

Best overall response (BOR) as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

BOR will be calculated as the best response from date study treatment started until progression or censoring date in the absence of progression. BOR will be based on RECIST v1.1 and Prostate Cancer Working Group-3 (PCWG-3) (for prostate cancer).

Time frame: Every 6 weeks (±7 days) from the first dose for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Objective response rate (ORR) as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

ORR is defined as the proportion of patients who have a best response of either complete response (CR) or partial response (PR) based on RECIST v1.1 or PCWG-3. Response must be confirmed (at least two responses of CR or PR a minimum of 4 weeks apart and prior to progression/subsequent therapy) for Parts A, B1 and B2.

Time frame: Every 6 weeks (±7 days) from the first dose for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Disease control rate (DCR) as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

DCR is defined as the proportion of patients with CR, PR, or SD based on RECIST v1.1 or PCWG-3.

Time frame: Every 6 weeks (±7 days) from the first dose for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Duration of response (DOR) as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

DOR will be defined for patients with a BOR of CR/PR as the time from the date of first documented response until date of documented progression (by RECIST v1.1 or PCWG-3) or death in the absence of disease progression. BOR should be confirmed in Parts A, B1, and B2.

Time frame: Every 6 weeks (±7 days) from the first dose for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Change in tumor size as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

Change in tumor size will be assessed for all patients with target lesion measurements at baseline.

Time frame: Every 6 weeks (±7 days) from the first dose for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Parts A, B1, and B2: Progression free survival (PFS) as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

PFS is defined as the time from the start of study treatment until the earliest objective disease progression defined by RECIST v1.1 or PCWG-3 or death by any cause in the absence of progression.

Time frame: Every 6 weeks (±7 days) from the first dose for 18 weeks, then every 9 weeks (±7 days) up to approximately 24 months. Each cycle is 21 days.

Overall survival (OS) as a measure of efficacy for ART4215 as monotherapy, in combination with talazoparib or in combination with niraparib

OS is defined as the time from the start of study treatment until death due to any cause.

Time frame: Assessed every 12 weeks after treatment discontinuation for up to 24 months.

Pharmacokinetic Analysis (single dose): maximum plasma concentration (Cmax) of ART4215 when given alone, in combination with talazoparib or in combination with niraparib