A Study of PSMA ADC in Subjects With Metastatic Castration-resistant Prostate Cancer (mCRPC)

Sponsor
Progenics Pharmaceuticals, Inc. (Industry)
Overall Status
Completed
CT.gov ID
NCT01695044
Collaborator
(none)
119
36
1
29
3.3
0.1

Study Details

Study Description

Brief Summary

PSMA ADC 2301 is a Phase 2, open-label, study to assess the anti-tumor activity and tolerability of Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) in two groups of subjects with metastatic castration-resistant prostate cancer (mCRPC). One group comprises subjects who must have received at least one taxane-containing chemotherapy regimen (e.g. docetaxel, cabazitaxel). The second group comprises subjects who are cytotoxic chemotherapy-naïve. Subjects who are cytotoxic chemotherapy-naïve must have received and progressed on-, be ineligible for, refused, have an intolerance to-, or not have access to Radium-223. Both groups of subjects must also have received and progressed on abiraterone acetate and/or enzalutamide. If a subject is unable to receive abiraterone acetate and/or enzalutamide, Sponsor approval is required for participation in the study. Subjects will receive up to eight doses of PSMA ADC approximately once every three weeks.

Condition or Disease Intervention/Treatment Phase
  • Drug: PSMA ADC
Phase 2

Study Design

Study Type:
Interventional
Actual Enrollment :
119 participants
Allocation:
N/A
Intervention Model:
Single Group Assignment
Masking:
None (Open Label)
Primary Purpose:
Treatment
Official Title:
A Phase 2, Open-label, Multicenter Study of PSMA ADC in Subjects With Metastatic Castration-resistant Prostate Cancer
Study Start Date :
Sep 1, 2012
Actual Primary Completion Date :
Oct 1, 2014
Actual Study Completion Date :
Feb 1, 2015

Arms and Interventions

Arm Intervention/Treatment
Experimental: Arm 1: PSMA ADC

Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) administered IV at 2.5 mg/kg Q3W for 8 cycles or 2.3 mg/kg Q3W for 8 cycles.

Drug: PSMA ADC
PSMA ADC administered IV at 2.5 mg/kg Q3W for 8 cycles or 2.3 mg/kg Q3W for 8 cycles.

Outcome Measures

Primary Outcome Measures

  1. Percentage of Participants With Total Serum PSA Response [24 Weeks]

    Total serum prostate-specific antigen (PSA) response was defined as any decrease from baseline of at least 30% or 50%.

  2. CTC Response [24 Weeks]

    Circulating tumor cells (CTC) response was examined at two levels: at least 30% decrease or at least 50% decrease in CTC levels. Response was defined as any decrease from baseline of at least 30% or 50%.

  3. Overall Radiologic Response [24 weeks]

    Overall radiologic response was measured prior to the first dose of study drug, at predose of cycle 5, and at the end of study. 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.

Eligibility Criteria

Criteria

Ages Eligible for Study:
18 Years and Older
Sexes Eligible for Study:
Male
Accepts Healthy Volunteers:
No
Inclusion Criteria:
  1. A diagnosis of metastatic castration-resistant prostate cancer.

    1. Prior history of treatment with at least one taxane-containing chemotherapy regimen (e.g. docetaxel, cabazitaxel). If a subject has received more than two cytotoxic chemotherapy regimens, Sponsor approval is required for study participation.

OR

  1. No prior history of treatment with a cytotoxic chemotherapy regimen.
  1. Must have received and progressed on abiraterone acetate and/or enzalutamide. If subject is unable to receive abiraterone acetate and/or enzalutamide, Sponsor approval is required for participation in the study.

  2. Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2.

  3. Life expectancy ≥ six months.

  4. Cytotoxic chemotherapy-naïve subjects ONLY must have received and progressed on-, be ineligible for, refused, have an intolerance to-, or not have access to Radium-223.

Exclusion Criteria:
  1. Treatment within 30 days prior to first dose of study drug of the following:
  • External Radiation therapy

  • Radiopharmaceuticals

  • Cytotoxic chemotherapy

  • Treatment with an investigational agent

  1. Clinically significant cardiac disease or severe debilitating pulmonary disease

  2. An acute infection requiring ongoing antibiotic therapy

  3. Any prior treatment with PSMA ADC or other therapies targeting PSMA, or other antibody drug conjugate (ADC) products that contain monomethyl auristatin E (MMAE) (e.g., brentuximab vedotin, glembatumumab vedotin, ASG-5ME, RG7450) unless approved by Sponsor.

  4. History of drug and/or alcohol abuse

  5. History of pancreatitis

Contacts and Locations

Locations

Site City State Country Postal Code
1 Birmingham Alabama United States 35205
2 Tucson Arizona United States 85724
3 Burbank California United States 91505
4 Encinitas California United States 92024
5 Los Angeles California United States 90024
6 San Diego California United States 92123
7 Denver Colorado United States 80218
8 New Haven Connecticut United States 06520
9 Norwalk Connecticut United States 06856
10 Port St. Lucie Florida United States 34952
11 Honolulu Hawaii United States 96819
12 Fairway Kansas United States 66205
13 New Orleans Louisiana United States 70115
14 Baltimore Maryland United States 21201
15 Baltimore Maryland United States 21205
16 Rockville Maryland United States 20850
17 Boston Massachusetts United States 02111
18 Ann Arbor Michigan United States 28109
19 Rochester Minnesota United States 55905
20 Omaha Nebraska United States 68130
21 Las Vegas Nevada United States 89169
22 Lake Success New York United States 11042
23 New York New York United States 10065
24 Rochester New York United States 14642
25 Stony Brook New York United States 11794
26 Huntersville North Carolina United States 28078
27 Raleigh North Carolina United States 27607
28 Cleveland Ohio United States 44195
29 Pittsburgh Pennsylvania United States 15232
30 Providence Rhode Island United States 02906
31 Greenville South Carolina United States 29605
32 Myrtle Beach South Carolina United States 29572
33 Memphis Tennessee United States 38120
34 Dallas Texas United States 75390
35 Norfolk Virginia United States 23502
36 Seattle Washington United States 98101

Sponsors and Collaborators

  • Progenics Pharmaceuticals, Inc.

Investigators

  • Study Director: Vivien Wong, PhD, Progenics Pharmaceuticals, Inc.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
Progenics Pharmaceuticals, Inc.
ClinicalTrials.gov Identifier:
NCT01695044
Other Study ID Numbers:
  • PSMA ADC 2301
First Posted:
Sep 27, 2012
Last Update Posted:
Mar 24, 2017
Last Verified:
Feb 1, 2017
Individual Participant Data (IPD) Sharing Statement:
No
Plan to Share IPD:
No
Additional relevant MeSH terms:

Study Results

Participant Flow

Recruitment Details
Pre-assignment Detail
Arm/Group Title Arm 1: PSMA ADC
Arm/Group Description PSMA ADC administered IV at 2.5 mg/kg Q3W for 8 cycles or 2.3 mg/kg Q3W for 8 cycles.
Period Title: Overall Study
STARTED 119
COMPLETED 17
NOT COMPLETED 102

Baseline Characteristics

Arm/Group Title Arm 1: PSMA ADC Chemotherapy-experienced Arm 2: PSMA ADC Chemotherapy-naive Total
Arm/Group Description PSMA ADC administered IV at 2.5 mg/kg Q3W for 8 cycles or 2.3 mg/kg Q3W for 8 cycles. PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. Total of all reporting groups
Overall Participants 84 35 119
Age (years) [Mean (Full Range) ]
Mean (Full Range) [years]
70.7
73.1
71.4
Sex: Female, Male (Count of Participants)
Female
0
0%
0
0%
0
0%
Male
84
100%
35
100%
119
100%
Prostate specific antigen (PSA) (ug/mL) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [ug/mL]
804.8
(2173.38)
220.9
(438.35)
633.1
(1857.2)
PSA (ug/mL) [Median (Full Range) ]
Median (Full Range) [ug/mL]
188.9
94.1
162.9

Outcome Measures

1. Primary Outcome
Title Percentage of Participants With Total Serum PSA Response
Description Total serum prostate-specific antigen (PSA) response was defined as any decrease from baseline of at least 30% or 50%.
Time Frame 24 Weeks

Outcome Measure Data

Analysis Population Description
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.
Arm/Group Title PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Arm/Group Description Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-experienced group was comprised of 84 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). Prostate Specific Membrane Antigen Antibody Drug Conjugate (PSMA ADC) administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-naïve group was comprised of 35 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.
Measure Participants 79 34
>30% Decrease in PSA
29
32
>50% Decrease in PSA
11
21
2. Primary Outcome
Title CTC Response
Description Circulating tumor cells (CTC) response was examined at two levels: at least 30% decrease or at least 50% decrease in CTC levels. Response was defined as any decrease from baseline of at least 30% or 50%.
Time Frame 24 Weeks

Outcome Measure Data

Analysis Population Description
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.
Arm/Group Title PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Arm/Group Description PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-experienced group was comprised of 84 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). PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-naïve group was comprised of 35 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.
Measure Participants 68 26
>30% Decrease in CTC
81
92
>50% Decrease in CTC
74
85
3. Primary Outcome
Title Overall Radiologic Response
Description Overall radiologic response was measured prior to the first dose of study drug, at predose of cycle 5, and at the end of study. 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.
Time Frame 24 weeks

Outcome Measure Data

Analysis Population Description
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 full modified Intention-to-Treat (mITT) population (n = 119) was examined.
Arm/Group Title PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Arm/Group Description PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-experienced group was comprised of 84 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). PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-naïve group was comprised of 35 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.
Measure Participants 84 35
Non-evaluable
26
17
Partial response
0
6
Progressive disease
13
9
Stable disease
61
69

Adverse Events

Time Frame 24 weeks
Adverse Event Reporting Description
Arm/Group Title PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Arm/Group Description PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-experienced group was comprised of 84 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). PSMA ADC administered IV at 2.3 mg/kg Q3W for 8 cycles. The chemotherapy-naïve group was comprised of 35 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.
All Cause Mortality
PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total / (NaN) / (NaN)
Serious Adverse Events
PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 43/84 (51.2%) 18/35 (51.4%)
Blood and lymphatic system disorders
Anemia 4/84 (4.8%) 0/35 (0%)
Febrile neutropenia 2/84 (2.4%) 3/35 (8.6%)
Neutropenia 2/84 (2.4%) 0/35 (0%)
Hemorrhagic anemia 1/84 (1.2%) 0/35 (0%)
Cardiac disorders
Sinus tachycardia 2/84 (2.4%) 0/35 (0%)
Gastrointestinal disorders
Abdominal pain 3/84 (3.6%) 0/35 (0%)
Constipation 2/84 (2.4%) 2/35 (5.7%)
Ileus 2/84 (2.4%) 1/35 (2.9%)
General disorders
Asthenia 3/84 (3.6%) 0/35 (0%)
Fatigue 3/84 (3.6%) 1/35 (2.9%)
Non-cardiac chest pain 2/84 (2.4%) 0/35 (0%)
Infections and infestations
Bacteremia 2/84 (2.4%) 0/35 (0%)
Lobar pneumonia 2/84 (2.4%) 0/35 (0%)
Pneumonia 3/84 (3.6%) 0/35 (0%)
Sepsis 2/84 (2.4%) 1/35 (2.9%)
Investigations
ECG QT prolonged 2/84 (2.4%) 0/35 (0%)
Decreased neutrophil count 3/84 (3.6%) 0/35 (0%)
Metabolism and nutrition disorders
Dehydration 3/84 (3.6%) 5/35 (14.3%)
Hyponatremia 3/84 (3.6%) 2/35 (5.7%)
Hypophosphatemia 2/84 (2.4%) 1/35 (2.9%)
Musculoskeletal and connective tissue disorders
Back pain 2/84 (2.4%) 0/35 (0%)
Bone pain 3/84 (3.6%) 0/35 (0%)
Muscular weakness 3/84 (3.6%) 0/35 (0%)
Nervous system disorders
Transient ischemic attack 0/84 (0%) 2/35 (5.7%)
Renal and urinary disorders
Hematuria 1/84 (1.2%) 2/35 (5.7%)
Acute renal failure 1/84 (1.2%) 2/35 (5.7%)
Respiratory, thoracic and mediastinal disorders
Dyspnea 4/84 (4.8%) 0/35 (0%)
Vascular disorders
Deep vein thrombosis 1/84 (1.2%) 2/35 (5.7%)
Other (Not Including Serious) Adverse Events
PSMA ADC Chemotherapy-experienced Chemotherapy-naive
Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 84/84 (100%) 35/35 (100%)
Blood and lymphatic system disorders
Anemia 25/84 (29.8%) 7/35 (20%)
Febrile neutropenia 2/84 (2.4%) 3/35 (8.6%)
Leukopenia 3/84 (3.6%) 2/35 (5.7%)
Neutropenia 16/84 (19%) 6/35 (17.1%)
Cardiac disorders
Tachycardia 2/84 (2.4%) 2/35 (5.7%)
Vertigo 3/84 (3.6%) 2/35 (5.7%)
Eye disorders
Vision blurred 0/84 (0%) 2/35 (5.7%)
Gastrointestinal disorders
Nausea 41/84 (48.8%) 23/35 (65.7%)
Diarrhea 33/84 (39.3%) 16/35 (45.7%)
Constipation 30/84 (35.7%) 12/35 (34.3%)
Vomiting 22/84 (26.2%) 12/35 (34.3%)
Abdominal pain 15/84 (17.9%) 5/35 (14.3%)
Dyspepsia 7/84 (8.3%) 6/35 (17.1%)
Abdominal pain upper 5/84 (6%) 0/35 (0%)
Dysphagia 3/84 (3.6%) 2/35 (5.7%)
Flatulence 4/84 (4.8%) 2/35 (5.7%)
Gastroesophageal reflux disease 8/84 (9.5%) 1/35 (2.9%)
General disorders
Fatigue 52/84 (61.9%) 19/35 (54.3%)
Peripheral edema 18/84 (21.4%) 4/35 (11.4%)
Asthenia 13/84 (15.5%) 3/35 (8.6%)
Pain 9/84 (10.7%) 3/35 (8.6%)
Chills 4/84 (4.8%) 2/35 (5.7%)
Gait disturbance 5/84 (6%) 2/35 (5.7%)
Pyrexia 6/84 (7.1%) 2/35 (5.7%)
Infections and infestations
Urinary tract infection 9/84 (10.7%) 4/35 (11.4%)
Upper resiratory tract infection 2/84 (2.4%) 2/35 (5.7%)
Injury, poisoning and procedural complications
Fall 7/84 (8.3%) 7/35 (20%)
Excoriation 1/84 (1.2%) 2/35 (5.7%)
Infusion related reaction 5/84 (6%) 1/35 (2.9%)
Investigations
Aspartate aminotransferase increased 18/84 (21.4%) 1/35 (2.9%)
Decreased neutrophil count 14/84 (16.7%) 3/35 (8.6%)
Decreased weight 14/84 (16.7%) 8/35 (22.9%)
Alanine aminotransferase increased 10/84 (11.9%) 1/35 (2.9%)
White blood cell count decreased 10/84 (11.9%) 0/35 (0%)
Blood alkaline phosphatase increased 8/84 (9.5%) 1/35 (2.9%)
Lymphocyte count decreased 5/84 (6%) 0/35 (0%)
Metabolism and nutrition disorders
Decreased appetite 40/84 (47.6%) 15/35 (42.9%)
Dehydration 20/84 (23.8%) 6/35 (17.1%)
Hypophosphatemia 15/84 (17.9%) 2/35 (5.7%)
Hypokalemia 14/84 (16.7%) 11/35 (31.4%)
Hypocalcemia 13/84 (15.5%) 2/35 (5.7%)
Hyponatremia 13/84 (15.5%) 4/35 (11.4%)
Hyperglycemia 12/84 (14.3%) 2/35 (5.7%)
Hypoalbuminemia 9/84 (10.7%) 0/35 (0%)
Hypomagnesemia 4/84 (4.8%) 2/35 (5.7%)
Musculoskeletal and connective tissue disorders
Muscular weakness 19/84 (22.6%) 11/35 (31.4%)
Back pain 15/84 (17.9%) 4/35 (11.4%)
Myalgia 14/84 (16.7%) 7/35 (20%)
Arthralgia 10/84 (11.9%) 4/35 (11.4%)
Bone pain 10/84 (11.9%) 4/35 (11.4%)
Musculoskeletal pain 5/84 (6%) 3/35 (8.6%)
Pain in extremity 6/84 (7.1%) 3/35 (8.6%)
Nervous system disorders
Peripheral neuropathy 31/84 (36.9%) 13/35 (37.1%)
Headache 17/84 (20.2%) 3/35 (8.6%)
Dizziness 11/84 (13.1%) 6/35 (17.1%)
Peripheral sensory neuropathy 7/84 (8.3%) 8/35 (22.9%)
Dysgeusia 5/84 (6%) 6/35 (17.1%)
Ataxia 3/84 (3.6%) 2/35 (5.7%)
Paraesthesia 5/84 (6%) 1/35 (2.9%)
Sciatica 0/84 (0%) 2/35 (5.7%)
Transient ischemic attack 0/84 (0%) 2/35 (5.7%)
Psychiatric disorders
Insomnia 18/84 (21.4%) 6/35 (17.1%)
Depression 3/84 (3.6%) 5/35 (14.3%)
Anxiety 5/84 (6%) 3/35 (8.6%)
Confusional state 5/84 (6%) 1/35 (2.9%)
Renal and urinary disorders
Hematuria 4/84 (4.8%) 2/35 (5.7%)
Proteinuria 5/84 (6%) 0/35 (0%)
Acute renal failure 1/84 (1.2%) 3/35 (8.6%)
Urinary incontinence 3/84 (3.6%) 2/35 (5.7%)
Respiratory, thoracic and mediastinal disorders
Dyspnea 19/84 (22.6%) 2/35 (5.7%)
Cough 7/84 (8.3%) 3/35 (8.6%)
Pleural effusion 2/84 (2.4%) 2/35 (5.7%)
Productive cough 7/84 (8.3%) 0/35 (0%)
Skin and subcutaneous tissue disorders
Alopecia 12/84 (14.3%) 5/35 (14.3%)
Rash 4/84 (4.8%) 4/35 (11.4%)
Pruritus 1/84 (1.2%) 3/35 (8.6%)
Vascular disorders
Deep vein thrombosis 3/84 (3.6%) 2/35 (5.7%)
Hypertension 2/84 (2.4%) 2/35 (5.7%)
Hypotension 5/84 (6%) 2/35 (5.7%)

Limitations/Caveats

[Not Specified]

More Information

Certain Agreements

Principal Investigators are NOT employed by the organization sponsoring the study.

There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.

Results Point of Contact

Name/Title Dr. Vincent A. DiPippo
Organization Progenics Pharmaceuticals, Inc.
Phone (646) 975-2502
Email vdipippo@progenics.com
Responsible Party:
Progenics Pharmaceuticals, Inc.
ClinicalTrials.gov Identifier:
NCT01695044
Other Study ID Numbers:
  • PSMA ADC 2301
First Posted:
Sep 27, 2012
Last Update Posted:
Mar 24, 2017
Last Verified:
Feb 1, 2017