Neoplasms

Urinary Tract, Sexual Organs, and Pregnancy Conditions

All Conditions

Prostatic Neoplasms

Genital Neoplasms, Male

Urogenital Neoplasms

Genital Diseases

Genital Diseases, Male

Urogenital Diseases

Prostatic Diseases

Male Urogenital Diseases

All Drugs and Chemicals

Antibodies

Immunoglobulins

Subjects started the extension study at the same dose received upon completion of the core PSMA ADC 2301 study. Each Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) dose was administered as an IV infusion over approximately 60 minutes once every three weeks (Q3W) for up to eight doses, unless a dose delay or dose reduction was required.

Upon recommendation from the PI and after Sponsor approval, a subject benefiting from treatment could have received up to eight additional doses Q3W. Subjects were weighed prior to each cycle and dosing was calculated on a mg/kg basis prior to each dose, with a maximum weight of 100 kg for dosing calculations.

PSMA ADC

Vivien Wong, PhD

PSMA ADC 2301EXT is an open-label study to further assess the anti-tumor activity as measured by radiographic imaging and biomarkers, safety and tolerability of Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) in subjects with mCRPC. Subjects who have participated in the PSMA ADC 2301 study and who, in the opinion of the Principal Investigator are likely to benefit from continued treatment with PSMA ADC are eligible for the PSMA ADC 2301 extension study. Subjects who are benefiting from treatment may be able to receive up to an additional eight to sixteen doses (every 3 weeks) of PSMA ADC.

An Open-label Extension Study of PSMA ADC 2301 in mCRPC

An Open-label Treatment Extension of PSMA ADC in Subjects With Metastatic Castration-resistant Prostate Cancer (mCRPC)

Total serum PSA (prostate-specific antigen) was measured at baseline and had at least one post-baseline assessment. PSA response was examined at two levels: at least 30% decrease or at least 50% decrease in serum PSA. Response was assessed as the maximum decrease over the extension study. Response was defined as any decrease from baseline of at least 30% or 50%.

Circulating tumor cells (CTC) response was measured at baseline and had at least one post-baseline assessment. Response was assessed as the maximum decrease over the extension study. Response was defined as any decrease from baseline of at least 50%.

Overall radiologic response was measured at baseline and post-baseline. Imaging techniques used at screening were used throughout the study. The preferred imaging techniques include: bone scan, contrast enhanced CT of chest, contrast enhanced CT of pelvis, and contrast enhanced CT of upper \& lower abdomen. Best overall radiologic response (confirmed), target and non-target lesions, was defined as responses in bone, visceral or nodal metastases according to the Modified Response Evaluation Criteria (RECIST 1.1). The best overall radiologic response is the best response recorded from the start of the treatment until disease progression/recurrence (taking, as reference for progressive disease, the smallest measurements recorded since the treatment started). The subject's best response assignment depended on the achievement of both measurement and confirmation criteria.

Progenics Pharmaceuticals, Inc.

The chemotherapy-experienced group was comprised of 6 subjects who must have received at least one taxane-containing chemotherapy regimen (e.g., docetaxel, cabazitaxel) prior to the study (more than two cytotoxic chemotherapy regimens required sponsor approval for study participation).

Subjects started the extension study at the same dose received upon completion of the core PSMA ADC 2301 study. Each PSMA ADC dose was administered as an IV infusion over approximately 60 minutes once every three weeks (Q3W) for up to eight doses, unless a dose delay or dose reduction was required.

PSMA ADC Chemotherapy-experienced

The chemotherapy-naïve group was comprised of 3 subjects who were cytotoxic chemotherapy-naïve. Chemotherapy-naïve subjects must have received and progressed on Radium-223 (following its approval by FDA), or have been ineligible for it, refused it, had an intolerance to it, or did not have access to it.

Subjects started the extension study at the same dose received upon completion of the core PSMA ADC 2301 study. Each PSMA ADC dose was administered as an IV infusion over approximately 60 minutes once every three weeks (Q3W) for up to eight doses, unless a dose delay or dose reduction was required.

PSMA ADC Chemotherapy-naive

Subjects started the extension study at the same dose received upon completion of the core PSMA ADC 2301 study. Each Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) dose was administered as an IV infusion over approximately 60 minutes once every three weeks (Q3W) for up to eight doses, unless a dose delay or dose reduction was required.

PSMA ADC: Upon recommendation from the PI and after Sponsor approval, a subject benefitting from treatment could have received up to eight additional doses Q3W. Subjects were weighed prior to each cycle and dosing was calculated on a mg/kg basis prior to each dose, with a maximum weight of 100 kg for dosing calculations.

Total

Age, Continuous

Sex: Female, Male

Prostate specific antigen (PSA)

Dr. Vincent A. DiPippo

>30% Decrease in PSA

>50% Decrease in PSA

Both groups must also have received and progressed on abiraterone acetate and/or enzalutamide prior to the study (once these agents were commercially available for use). The population examined was those subjects with a PSA baseline value and at least one post-baseline value.

Percentage of Participants With Total Serum PSA Response

Both groups must also have received and progressed on abiraterone acetate and/or enzalutamide prior to the study (once these agents were commercially available for use). The population examined was those subjects with a CTC baseline value and at least one post-baseline value.

CTC Response

Partial response

Stable disease

Both groups must also have received and progressed on abiraterone acetate and/or enzalutamide prior to the study (once these agents were commercially available for use). All subjects (n=9) enrolled in 2301EXT were evaluated.

Overall Radiologic Response

Subjects started the extension study at the same dose received upon completion of the core PSMA ADC 2301 study. Each PSMA ADC dose was administered as an IV infusion over approximately 60 minutes once every three weeks (Q3W) for up to eight doses, unless a dose delay or dose reduction was required.

PSMA ADC: Upon recommendation from the PI and after Sponsor approval, a subject benefitting from treatment could have received up to eight additional doses Q3W. Subjects were weighed prior to each cycle and dosing was calculated on a mg/kg basis prior to each dose, with a maximum weight of 100 kg for dosing calculations.

Spots Global Cancer Trial Database for An Open-label Extension Study of PSMA ADC 2301 in mCRPC

Trial Identification

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Study Description

Keywords

Eligibility

Locations

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