Trial Outcomes & Findings for Immunotherapy in Patients With Metastatic Cancers and CDK12 Mutations (NCT NCT03570619)

Last Updated: 2025-05-08

Results Overview

The primary objective is overall response rate (ORR) of patients with metastatic CRPC. Response will be defined as a 50% decline in PSA (prostate specific antigen) from baseline as determined by PCWG3 criteria.

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

56 participants

Primary outcome timeframe

Up to 24 months post treatment

Results posted on

2025-05-08

Participant Flow

Participant milestones

Participant milestones
Measure	Metastatic CRPC Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Overall Study STARTED	33	8	15
Overall Study COMPLETED	29	5	14
Overall Study NOT COMPLETED	4	3	1

Reasons for withdrawal

Reasons for withdrawal
Measure	Metastatic CRPC Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Overall Study Adverse Event	2	0	1
Overall Study new diagnosis of new malignancy	1	0	0
Overall Study Physician Decision	1	1	0
Overall Study Withdrawal by Subject	0	2	0

Baseline Characteristics

Immunotherapy in Patients With Metastatic Cancers and CDK12 Mutations

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure	Metastatic CRPC n=33 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=8 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=15 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.	Total n=56 Participants Total of all reporting groups
Age, Categorical <=18 years	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants
Age, Categorical Between 18 and 65 years	8 Participants n=5 Participants	6 Participants n=7 Participants	7 Participants n=5 Participants	21 Participants n=4 Participants
Age, Categorical >=65 years	25 Participants n=5 Participants	2 Participants n=7 Participants	8 Participants n=5 Participants	35 Participants n=4 Participants
Sex: Female, Male Female	0 Participants n=5 Participants	8 Participants n=7 Participants	0 Participants n=5 Participants	8 Participants n=4 Participants
Sex: Female, Male Male	33 Participants n=5 Participants	0 Participants n=7 Participants	15 Participants n=5 Participants	48 Participants n=4 Participants
Ethnicity (NIH/OMB) Hispanic or Latino	1 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	1 Participants n=4 Participants
Ethnicity (NIH/OMB) Not Hispanic or Latino	31 Participants n=5 Participants	8 Participants n=7 Participants	15 Participants n=5 Participants	54 Participants n=4 Participants
Ethnicity (NIH/OMB) Unknown or Not Reported	1 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	1 Participants n=4 Participants
Race (NIH/OMB) American Indian or Alaska Native	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants
Race (NIH/OMB) Asian	1 Participants n=5 Participants	0 Participants n=7 Participants	1 Participants n=5 Participants	2 Participants n=4 Participants
Race (NIH/OMB) Native Hawaiian or Other Pacific Islander	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants
Race (NIH/OMB) Black or African American	6 Participants n=5 Participants	0 Participants n=7 Participants	2 Participants n=5 Participants	8 Participants n=4 Participants
Race (NIH/OMB) White	25 Participants n=5 Participants	8 Participants n=7 Participants	12 Participants n=5 Participants	45 Participants n=4 Participants
Race (NIH/OMB) More than one race	0 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	0 Participants n=4 Participants
Race (NIH/OMB) Unknown or Not Reported	1 Participants n=5 Participants	0 Participants n=7 Participants	0 Participants n=5 Participants	1 Participants n=4 Participants
Region of Enrollment United States	33 participants n=5 Participants	8 participants n=7 Participants	15 participants n=5 Participants	56 participants n=4 Participants

PRIMARY outcome

Timeframe: Up to 24 months post treatment

Population: only subjects who received at least 1 cycle(s) of therapy, and who have 2 PSA measurements after protocol therapy initiation were considered evaluable for PSA response.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=23 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=14 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
The Proportion of Patients With CDK12 Loss of Function Metastatic CRPC That Respond to Treatment.	2 participants Interval 1.0 to 28.0	—	0 participants Interval 0.0 to 0.0

SECONDARY outcome

Timeframe: Up to 104 weeks after start of therapy

Population: Only Cohort B analyzed and only 3 patients were evaluable per RECIST

Overall response will be defined as patients that achieve either a partial response or complete response using RECIST 1.1 criteria. Complete response (CR) is defined as disappearance of all target lesions, determined by two separate observations conducted not less than 4 weeks apart. There can be no appearance of new lesions. Partial response (PR) is defined as at least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as reference the baseline sum LD. There can be no appearance of new lesions.

Outcome measures

Outcome measures
Measure	Metastatic CRPC Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=3 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
The Proportion of Patients That Respond to Treatment in Cohort B.	0 Participants	1 Participants	0 Participants

SECONDARY outcome

Timeframe: Up to 104 weeks after start of therapy

Population: numbers updated to include only evaluable patients

Radiographic progression-free survival (rPFS) is defined as the duration of time from start of treatment to time of radiographic progression. Progression is defined as at least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started, or the appearance of one or more new lesions.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=15 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=3 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=3 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Radiographic Progression Free Survival Time (rPFS)	166 days Interval 92.0 to 338.0	NA days Interval 82.0 to NA estimates indicate not reached	110 days Interval 92.0 to NA estimates indicate not reached

SECONDARY outcome

Timeframe: Up to 24 months post treatment

Progression is defined as the duration of time from start of treatment to time of progression. Progression is defined as: Either, Radiographic progression: At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started, or the appearance of one or more new lesions OR, PSA Progression: For rising PSA after an initial decline from baseline, the PSA is recorded from the start of therapy to first PSA increase that is ≥ 25% and ≥ 2ng/mL above the nadir, which is confirmed by a second value 4 or more weeks later, confirming a rising trend. If there is no initial decline from baseline, PSA progression is defined as ≥ 25% increase and ≥ 2 ng/mL increase from baseline beyond 12 weeks.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=23 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=3 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=14 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Progression Free Survival Time (PFS)	213 days Interval 110.0 to 346.0	NA days Interval 82.0 to NA estimates indicate not reached	138 days Interval 105.0 to 421.0

SECONDARY outcome

Timeframe: Up to 104 weeks after start of therapy

Defined by the time interval from the start of treatment to the day of permanent discontinuation of treatment (including death).

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=33 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=8 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=15 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Duration of Therapy (DOT)	12 weeks Interval 9.79 to 18.36	8.07 weeks Interval 5.71 to 19.29	15.86 weeks Interval 12.14 to 29.14

SECONDARY outcome

Timeframe: 6 months

Progression is defined as: Either, Radiographic progression: At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started, or the appearance of one or more new lesions OR, PSA Progression: For rising PSA after an initial decline from baseline, the PSA is recorded from the start of therapy to first PSA increase that is ≥ 25% and ≥ 2ng/mL above the nadir, which is confirmed by a second value 4 or more weeks later, confirming a rising trend. If there is no initial decline from baseline, PSA progression is defined as ≥ 25% increase and ≥ 2 ng/mL increase from baseline beyond 12 weeks.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=33 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=3 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=15 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Progression Rate at 6 Months	74 percentage of Participants Interval 54.0 to 87.0	67 percentage of Participants Interval 21.0 to 94.0	71 percentage of Participants Interval 45.0 to 88.0

SECONDARY outcome

Timeframe: Up to 24 months post treatment

Defined as the time from the start of treatment until death from any cause. Patients alive or lost to follow-up at the time of analysis will be censored at their last date of follow-up.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=32 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) n=8 Participants Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=15 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Overall Survival Time	273 days Interval 190.0 to 375.0	NA days Interval 191.0 to NA estimates indicate not reached	421 days Interval 111.0 to NA estimates indicate not reached

SECONDARY outcome

Timeframe: Up to 24 months post treatment

Population: Only evaluable prostate cancer patients were analyzed as PSA is only collected for prostate cancer participants.

PSA Progression: For rising PSA after an initial decline from baseline, the PSA is recorded from the start of therapy to first PSA increase that is ≥ 25% and ≥ 2ng/mL above the nadir, which is confirmed by a second value 4 or more weeks later, confirming a rising trend. If there is no initial decline from baseline, PSA progression is defined as ≥ 25% increase and ≥ 2 ng/mL increase from baseline beyond 12 weeks.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=23 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=14 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
PSA Progression Free Survival Time	213 days Interval 110.0 to 346.0	—	138 days Interval 105.0 to 421.0

SECONDARY outcome

Timeframe: Up to 24 months post treatment

Population: Only evaluable prostate cancer patients were analyzed as PSA is only collected for prostate cancer participants.

Outcome measures

Outcome measures
Measure	Metastatic CRPC n=23 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort A. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Solid Tumors (Non-prostate) Patients with all other metastatic subtypes will be enrolled in cohort B Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy. Ipilimumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy.	Metastatic CRPC With Monotherapy n=14 Participants Patients with metastatic castration resistant prostate cancer (mCRPC) will be enrolled in cohort C once enrollment to cohort A has been completed. Nivolumab: Patients in arms Metastatic CRPC and Experimental: Solid Tumors (non-prostate) will begin receiving combination therapy with nivolumab 3 mg/kg IV and ipilimumab 1 mg/kg IV every 3 weeks for up to 4 cycles if tolerated, followed by nivolumab maintenance therapy at flat dose 480 mg IV every 4 weeks through the end of the planned study duration, for up to 104 weeks of total therapy. Patients in arm Metastatic CRPC will receive therapy with monotherapy nivolumab therapy at flat dose 480 mg IV every 4 weeks for up to 104 weeks of total therapy.
Time to PSA Progression	NA days Interval 149.0 to NA estimates indicate not reached	—	NA days Interval 116.0 to NA estimates indicate not reached

Adverse Events

Metastatic CRPC

Serious events: 16 serious events

Other events: 32 other events

Deaths: 21 deaths

Solid Tumors (Non-prostate)

Serious events: 6 serious events

Other events: 7 other events

Deaths: 3 deaths

Metastatic CRPC With Monotherapy

Serious events: 4 serious events

Other events: 14 other events

Deaths: 6 deaths

Serious adverse events

Other adverse events

Additional Information

University of Michigan Cancer Center Admin

University of Michigan Rogel Cancer Center

Phone: 7349369499

Email: [email protected]

Results disclosure agreements

Principal investigator is a sponsor employee Other sites/PI's are not to publish
Publication restrictions are in place

Restriction type: OTHER