Pembrolizumab (pembro) plus docetaxel and prednisone in abiraterone (abi) or enzalutamide (enza)-pretreated patients (pts) with metastatic castrate resistant prostate cancer (mCRPC): Cohort B of the phase 1b/2 KEYNOTE-365 study.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 5029-5029 ◽  
Author(s):  
Christophe Massard ◽  
Margitta Retz ◽  
Peter Hammerer ◽  
Fernando Quevedo ◽  
Peter C.C. Fong ◽  
...  
Keyword(s):  
End Points ◽  
Immune Mediated ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Psa Progression ◽  
Pretreated Patients ◽  
Phase 1B ◽  
Grade 3 ◽  
Castrate Resistant

5029 Background: Pembro had activity as monotherapy in pretreated advanced mCRPC. Data are presented here from cohort B (pembro + docetaxel/prednisone) of KEYNOTE-365 (NCT02861573), a phase 1b/2 umbrella study to test combinations in mCRPC. Methods: Pts who progressed on or became intolerant to ≥4 wk of abi or enza in the prechemotherapy mCRPC state and progressed within 6 mo before screening were eligible. Pts received pembro 200 mg IV with docetaxel 75 mg/m2 IV Q3W plus prednisone 5 mg orally twice daily. The primary end points were safety and PSA response rate (confirmed PSA decrease ≥50%). Key secondary end points were investigator-determined ORR (RECIST v1.1), disease control rate (DCR: CR+PR+SD ≥6 mo), time to PSA progression, rPFS, and OS. Results: 72 pts (median age, 68 y; visceral disease, 36%; measurable disease, 50%) began pembro + docetaxel. Median (95% CI) follow-up was 10 (8-12) mo. Efficacy is outlined in the table. Treatment-related AEs occurred in 69 (96%) pts; most frequent (≥30%) were alopecia (43%), fatigue (40%), and diarrhea (39%). Grade 3-5 treatment-related AEs occurred in 27 (38%) pts, including 2 deaths from treatment-related AEs (pneumonitis). Most commonly reported immune-mediated AEs were infusion-related reactions (11%) and colitis (10%). Conclusions: Pembro + docetaxel/prednisone has activity in pts with mCRPC who previously progressed on second-generation hormone therapy. AEs were considered mild for the treatment combination. Clinical trial information: NCT02861573. [Table: see text]

KEYNOTE-365 cohort B updated results: Pembrolizumab (pembro) plus docetaxel and prednisone in abiraterone (abi) or enzalutamide (enza)-pretreated patients (pts) with metastatic castrate-resistant prostate cancer (mCRPC).

2020 ◽  
Vol 38 (6_suppl) ◽  
pp. 103-103 ◽  
Author(s):  
Michael Paul Kolinsky ◽  
Gwenaelle Gravis ◽  
Loic Mourey ◽  
Josep M. Piulats ◽  
Srikala S. Sridhar ◽  
...  
Keyword(s):  
Antihormonal Therapy ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Psa Progression ◽  
Pretreated Patients ◽  
Phase 1B ◽  
Grade 3 ◽  
Castrate Resistant ◽  
The Individual

103 Background: KEYNOTE-365 (NCT02861573) is a phase 1b/2 study to evaluate pembro in combination with other agents in mCRPC. Here we report updated results from cohort B (pembro + docetaxel and prednisone). Methods: Cohort B enrolled pts who failed or were intolerant to ≥4 wk of abi or enza in the prechemotherapy mCRPC state and whose disease progressed within 6 mo of screening as determined by PSA progression or radiologic bone/soft tissue progression. Pts received pembro 200 mg IV + docetaxel 75 mg/m2 IV Q3W and prednisone 5 mg orally twice daily. Primary end points were safety, PSA response rate (confirmed PSA decrease >50%), and ORR per blinded independent central review (BICR). Results: Of 104 treated pts, 72 discontinued, primarily due to progression (55%). Median age was 68 y (range 50-86), 24% were PD-L1+, 25% had visceral disease, and 50% had measurable disease. Median follow-up was 13 mo for all pts (n=104) and 19 mo for pts who had ≥27 wk of follow up (n=72). See table for efficacy outcomes. Treatment-related AEs occurred in 100 pts (96%); most frequent (≥30%) were alopecia, diarrhea, and fatigue (39% each). Grade 3-5 treatment-related AEs occurred in 42 pts (40%). Five pts died of AEs; 2 deaths were from treatment-related AEs (pneumonitis). Conclusions: With additional follow-up, pembro + docetaxel and prednisone continued to show activity in pts with mCRPC who failed previous antihormonal therapy. Safety of the combination was consistent with the known profiles of the individual agents and will be further evaluated in a phase 3 study (KEYNOTE-921). Clinical trial information: NCT02861573. [Table: see text]

Keynote-365 cohort C: Pembrolizumab (pembro) plus enzalutamide (enza) in abiraterone (abi)-pretreated patients (pts) with metastatic castrate resistant prostate cancer (mCRPC).

2019 ◽  
Vol 37 (7_suppl) ◽  
pp. 171-171 ◽  
Author(s):  
Peter C.C. Fong ◽  
Margitta Retz ◽  
Alexandra Drakaki ◽  
Christophe Massard ◽  
William R. Berry ◽  
...  
Keyword(s):  
Clinical Activity ◽  
First Year ◽  
End Points ◽  
Early Results ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Psa Progression ◽  
Pretreated Patients ◽  
Grade 3 ◽  
Castrate Resistant

171 Background: Pembro has antitumor activity as monotherapy in pretreated advanced mCRPC (KEYNOTE-028; KEYNOTE-199). A study has suggested that pembro + enza after progression on enza may have clinical activity. KEYNOTE-365 (NCT02861573) is a phase 1b/2 umbrella study testing combinations in mCRPC; we report early results from cohort C combining pembro + enza in mCRPC. Methods: Patients who failed or became intolerant to ≥4 weeks of abi in the pre-chemotherapy mCRPC state were included. Pts also had to have progressed within 6 months prior to screening as determined by either PSA progression or radiologic progression in bone or soft tissue. Pts received pembro 200 mg intravenously Q3W with enza 160 mg per day orally, and response was evaluated by PSA levels Q3W and imaging Q9W for the first year and Q12W thereafter. Primary end points were safety and PSA response rate (confirmed PSA decline ≥50%). Key secondary end points were investigator-assessed ORR (RECIST v1.1), disease control rate (DCR: CR+PR+SD ≥6 mo), time to PSA progression, rPFS, and OS. Results: 69 pts initiated treatment (median age 69 years; PD-L1+ 30%; visceral disease 26%; measurable disease 36%). Median (95% CI) follow-up was 9 (7-13) mo. See efficacy outcomes in table. Treatment-related AEs occurred in 63 (91%) pts; most frequent (≥20%) were fatigue (30%), rash (23%), and nausea (22%). Grade 3-4 treatment-related AEs occurred in 28 (41%) pts; no deaths were due to treatment-related AEs. Conclusions: Early results from the pembro + enza combination show sustained activity in abi-pretreated frontline mCRPC. Observed safety profile for the combination treatment was consistent with the known safety profiles of pembro and enza. Clinical trial information: NCT02861573. [Table: see text]

KEYNOTE-365 cohort C updated results: Pembrolizumab (pembro) plus enzalutamide (enza) in abiraterone (abi)-pretreated patients (pts) with metastatic castrate-resistant prostate cancer (mCRPC).

2020 ◽  
Vol 38 (6_suppl) ◽  
pp. 102-102 ◽  
Author(s):  
William R. Berry ◽  
Peter C.C. Fong ◽  
Josep M. Piulats ◽  
Leonard Joseph Appleman ◽  
Henry Jacob Conter ◽  
...  
Keyword(s):  
Response Rate ◽  
Objective Response ◽  
End Points ◽  
Duration Of Response ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Psa Progression ◽  
Grade 3 ◽  
Castrate Resistant

102 Background: KEYNOTE-365 (NCT02861573) is a phase 1b/2 study evaluating pembro in combination with other agents in mCRPC. An earlier report of cohort C showed activity and acceptable safety with pembro + enza. Updated results from cohort C are reported. Methods: Pts who failed or became intolerant to ≥4 wks of abi in prechemotherapy mCRPC state and whose disease progressed within 6 mo of screening per PSA progression or radiologic bone or soft tissue progression enrolled. Pts received pembro 200 mg IV Q3W with enza 160 mg/day PO. Primary end points: safety, PSA response rate (confirmed PSA decline ≥50%), and objective response rate (ORR) per blinded independent central review. Key secondary end points: disease control rate (DCR), duration of response (DOR), time to PSA progression, rPFS, and OS. Results: Of 102 treated pts, 73 discontinued, primarily due to progression (60%). Median age was 70 y (range, 43-87), 29% were PD-L1+, 17% had visceral disease, and 39% had measurable disease. Median follow up was 13 mo for all patients (n=102) and 17 mo for patients with ≥27 wks’ follow-up (n=69). See Table for efficacy outcomes. Treatment-related AEs occurred in 92 pts (90%); most frequent (≥20%) were fatigue (38%), nausea (22%), and rash (20%). Grade 3-5 treatment-related AEs occurred in 40 pts (39%). Three pts died of AEs (1 AE was treatment related [cause unknown]). Conclusions: With additional follow-up, pembro + enza continued to show activity in pts with abi-pretreated mCRPC. Safety of the combination was consistent with known profiles of pembro and enza. Clinical trial information: NCT02861573. [Table: see text]

Pembrolizumab (pembro) plus enzalutamide (enza) in abiraterone (abi)-pretreated patients (pts) with metastatic castrate resistant prostate cancer (mCRPC): Cohort C of the phase 1b/2 KEYNOTE-365 study.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 5010-5010 ◽  
Author(s):  
Peter C.C. Fong ◽  
Margitta Retz ◽  
Alexandra Drakaki ◽  
Christophe Massard ◽  
William R. Berry ◽  
...  
Keyword(s):  
Standard Of Care ◽  
Clinical Activity ◽  
Activity Data ◽  
End Points ◽  
Standard Of Care Treatment ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Phase 1B ◽  
Grade 3 ◽  
Castrate Resistant

5010 Background: Pembro has activity as monotherapy in pts with pretreated advanced mCRPC. A phase 2 study suggested that pembro + enza after progression on enza may have clinical activity. Data from cohort C (pembro + enza) of KEYNOTE-365 (NCT02861573), a phase 1b/2 umbrella study to test combinations in mCRPC, are presented. Methods: Pts who were unsuccessful with or became intolerant to ≥4 weeks of abi in the prechemotherapy mCRPC state, with either PSA or radiologic progression within 6 mo before screening were included. Pts received pembro 200 mg IV Q3W with enza 160 mg/day orally. Primary end points were safety and PSA response rate (confirmed PSA decrease ≥50%). Key secondary end points were investigator-assessed ORR (RECIST v1.1), disease control rate (DCR: CR+PR+SD ≥6 mo), time to PSA progression, rPFS, and OS. Results: 69 pts began treatment (median age, 69 y; visceral disease, 26%; measurable disease, 36%). Median (95% CI) follow-up was 9 (7-13) mo. Efficacy is outlined in the table. Treatment-related AEs occurred in 63 (91%) pts; most frequent (≥20%) were fatigue (30%), rash (23%), and nausea (22%). Grade 3/4 treatment-related AEs occurred in 28 (41%) pts; most common was rash (10%); no deaths were from treatment-related AEs. Conclusions: The pembro + enza combination showed sustained activity in abi-pretreated chemotherapy-naive mCRPC. AEs were considered tolerable for the treatment combination; incidence of rash resolved with standard-of-care treatment. Clinical trial information: NCT02861573. [Table: see text]

Keynote-365 cohort b: Pembrolizumab (pembro) plus docetaxel and prednisone in abiraterone (abi) or enzalutamide (enza)-pretreated patients (pts) with metastatic castrate resistant prostate cancer (mCRPC).

2019 ◽  
Vol 37 (7_suppl) ◽  
pp. 170-170 ◽  
Author(s):  
Christophe Massard ◽  
Margitta Retz ◽  
Peter Hammerer ◽  
Fernando Quevedo ◽  
Peter C.C. Fong ◽  
...  
Keyword(s):  
Safety Profile ◽  
Tissue Response ◽  
End Points ◽  
Early Results ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Psa Progression ◽  
Grade 3 ◽  
Castrate Resistant ◽  
Soft Tissue Response

170 Background: Pembro had antitumor activity as monotherapy in pretreated advanced mCRPC (KEYNOTE-028; KEYNOTE-199). KEYNOTE-365 (NCT02861573) is a phase 1b/2 umbrella study testing combinations in mCRPC; we report early results from cohort B combining pembro + docetaxel in mCRPC. Methods: Pts who failed or became intolerant to ≥4 weeks of abi or enza in the pre-chemotherapy mCRPC state received pembro 200 mg IV with docetaxel 75 mg/m2 IV Q3W plus prednisone 5 mg orally twice daily. Pts also progressed within 6 months prior to screening as determined by either PSA progression or radiologic progression in bone or soft tissue. Response was evaluated by PSA levels Q3W and imaging Q9W for first year and Q12W thereafter. Primary end points: safety and PSA response rate (confirmed PSA decline ≥50%). Key secondary end points: investigator-determined ORR (RECIST v1.1), disease control rate (DCR: CR+PR+SD ≥6 mo), time to PSA progression, rPFS, and OS. Results: 72 pts (median age 68 years; PD-L1+ 29%; visceral disease 36%; measurable disease 50%) initiated pembro + docetaxel. Median (95% CI) follow-up was 10 (8-12) mo. Efficacy is outlined in table below. Treatment-related AEs occurred in 69 (96%) pts; most frequent (≥30%) were alopecia (43%), fatigue (40%), and diarrhea (39%). Grade 3-5 treatment-related AEs occurred in 27 (38%) pts, including 2 deaths due to treatment-related AEs (pneumonitis). Conclusions: Combination of pembro + docetaxel/prednisone has activity in pts with mCRPC previously failing anti-hormonal therapy. Observed safety profile for the combination was consistent with known safety profile of each component. Clinical trial information: NCT02861573. [Table: see text]

Pembrolizumab (pembro) plus olaparib in docetaxel-pretreated patients (pts) with metastatic castrate-resistant prostate cancer (mCRPC): Cohort A of the phase 1b/2 KEYNOTE-365 study.

2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 5027-5027 ◽  
Author(s):  
Evan Y. Yu ◽  
Christophe Massard ◽  
Margitta Retz ◽  
Ali Tafreshi ◽  
Joan Carles ◽  
...  
Keyword(s):  
Second Generation ◽  
Response Rate ◽  
End Points ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Phase 1B ◽  
Grade 3 ◽  
Castrate Resistant ◽  
Individual Profiles ◽  
Composite Response

5027 Background: Individual activity with pembro or olaparib has been observed in mCRPC pts who progressed on second-generation hormone therapy (HT) and chemotherapy. Data from cohort A (pembro+olaparib) of KEYNOTE-365 (NCT02861573), a phase 1b/2 umbrella study to test combinations in mCRPC, are presented. Methods: Pts with mCRPC who progressed within 6 mo before screening, were docetaxel-pretreated (up to 1 other chemotherapy permitted) for mCRPC and had ≤2 second-generation HTs were eligible. Pts received pembro 200 mg IV Q3W+olaparib 400 mg orally twice daily. Primary end points: safety and PSA response rate (confirmed PSA decrease ≥50%). Key secondary end points: ORR per RECIST v1.1 (investigator review), disease control rate (DCR: CR+PR+SD ≥6 mo), time to PSA progression, composite response rate, rPFS, and OS. Results: Median (95% CI) follow-up was 11 (6-15) mo. 41 pts initiated treatment (median age, 69 y; visceral disease, 42%; RECIST-measurable, 68%; homologous recombination deficient detected, 0%). Efficacy is outlined in the table. Treatment-related AEs occurred in 39 (95%) pts; most frequent (≥30%) were anemia (37%), fatigue (34%), and nausea (34%). Grade 3-5 treatment-related AEs occurred in 21 (51%) pts. There were 2 deaths; 1 was treatment-related (cause unknown). Conclusions: Pembro+olaparib had activity in pts with mCRPC who were molecularly unselected and were previously treated with docetaxel and second-generation HT. The observed safety profile for the combination is consistent with individual profiles of pembro and olaparib. Clinical trial information: NCT02861573. [Table: see text]

Keynote-365 cohort a: Pembrolizumab (pembro) plus olaparib in docetaxel-pretreated patients (pts) with metastatic castrate-resistant prostate cancer (mCRPC).

2019 ◽  
Vol 37 (7_suppl) ◽  
pp. 145-145 ◽  
Author(s):  
Evan Y. Yu ◽  
Christophe Massard ◽  
Margitta Retz ◽  
Ali Tafreshi ◽  
Joan Carles Galceran ◽  
...  
Keyword(s):  
Response Rate ◽  
Circulating Tumor Cell ◽  
End Points ◽  
2Nd Generation ◽  
Early Results ◽  
Psa Response ◽  
Castrate Resistant Prostate Cancer ◽  
Psa Progression ◽  
Grade 3 ◽  
Castrate Resistant

145 Background: Activity with pembro or olaparib has been observed in mCRPC pts who progressed on 2nd-generation hormonal therapy (HT) and chemotherapy. From KEYNOTE-365 (NCT02861573), a phase 1b/2 umbrella study testing combinations in mCRPC, we report early results from cohort A combining pembro + olaparib. Methods: Pts with mCRPC were eligible if they progressed within 6 months prior to screening determined by either PSA progression or radiologic progression in bone or soft tissue. Pts were docetaxel-pretreated for mCRPC, may have received 1 other chemotherapy, and had ≤2 2nd-generation HT. Pts received pembro 200 mg IV Q3W + olaparib 400 mg orally twice daily. Primary end points: safety and PSA response rate (confirmed PSA decline ≥50%). Key secondary end points: ORR RECIST v1.1 (investigator review), disease control rate (DCR: CR+PR+SD ≥6 mo), time to PSA progression, composite response rate (ORR RECIST v1.1, confirmed PSA response, or confirmed decrease in circulating tumor cell count from ≥5 to <5 cells/7.5 mL blood), rPFS, and OS. Results: Median follow-up was 11 mo. 41 initiated treatment (median age 69 years; PD-L1+ 27%; visceral disease 42%; RECIST-measurable 68%; homologous recombination repair mutation [HRR] 0%). See efficacy in table below. Treatment-related AEs occurred in 39 (95%) pts. Most frequent (≥30%) were anemia (37%), fatigue (34%), and nausea (34%). Grade 3-5 treatment-related AEs were in 21 (51%) pts. There were 2 deaths; only 1 was treatment-related (cause unknown). Conclusions: Combination of pembro + olaparib has activity in pts previously treated with docetaxel and ≤2 2nd-generation HT for mCRPC and who are HRR wild type. Observed safety profile for the combination is consistent with individual profiles of pembro and olaparib. Clinical trial information: NCT02861573. [Table: see text]

KEYNOTE-365 cohort A updated results: Pembrolizumab (pembro) plus olaparib in docetaxel-pretreated patients (pts) with metastatic castration-resistant prostate cancer (mCRPC).

2020 ◽  
Vol 38 (6_suppl) ◽  
pp. 100-100 ◽  
Author(s):  
Evan Y. Yu ◽  
Josep M. Piulats ◽  
Gwenaelle Gravis ◽  
Brigitte Laguerre ◽  
Jose Angel Arranz Arija ◽  
...  
Keyword(s):  
Castration Resistant Prostate Cancer ◽  
2Nd Generation ◽  
Castration Resistant ◽  
Psa Response ◽  
Pretreated Patients ◽  
Phase 1B ◽  
Grade 3 ◽  
Individual Profiles ◽  
Clinical Trial Information

100 Background: KEYNOTE-365 (NCT02861573) is a phase 1b/2 study evaluating pembro + other agents in mCRPC. Updated results from cohort A (pembro + olaparib) are reported. Methods: Docetaxel-pretreated, molecularly unselected pts with mCRPC with progression within 6 mo of screening per PSA or radiologic bone/soft tissue progression enrolled. Pts may have received 1 other chemotherapy and ≤2 2nd-generation hormone therapy (HT). Pts received pembro 200 mg IV Q3W + olaparib 400 mg PO BID. Primary end points: safety, PSA response rate (confirmed PSA decline ≥50%), and ORR per blinded independent central review. Results: Of 84 treated pts, 42 discontinued, primarily due to progression (n=29). Median age was 71 y (range, 47-83); 26% were PD-L1+, 26% had visceral disease, and 57% had RECIST-measurable disease. Median follow-up was 3 mo for all pts (n=81) and 14 mo for pts with ≥27 wks’ follow-up (n=41). See Table for efficacy outcomes. Treatment-related AEs occurred in 70 (83%) pts. Most frequent (≥30%) were nausea (33%) and anemia (31%). Grade 3-5 treatment-related AEs occurred in 29 (35%) pts. Three pts died of AEs (2 treatment related [l myocardial infarction, 1 unknown cause]). Conclusions: With additional follow-up, pembro + olaparib continued to show activity in docetaxel-pretreated, molecularly unselected pts who previously received HT for mCRPC. Safety of the combination was consistent with individual profiles of each agent. Clinical trial information: NCT02861573. [Table: see text]

scholarly journals 347 KEYNOTE-365 cohort C: pembrolizumab + enzalutamide in patients with abiraterone acetate–pretreated metastatic castration-resistant prostate cancer (mCRPC)—data after minimum of 22 months of follow-up

2021 ◽  
Vol 9 (Suppl 3) ◽  
pp. A374-A374
Author(s):  
Leonard Appleman ◽  
Tilman Todenhoefer ◽  
William Berry ◽  
Howard Gurney ◽  
Margitta Retz ◽  
...  
Keyword(s):  
Antitumor Activity ◽  
Response Rate ◽  
Abiraterone Acetate ◽  
End Points ◽  
Link Type ◽  
Measurable Disease ◽  
Psa Response ◽  
Psa Progression ◽  
Grade 3

BackgroundPrevious data from cohort C of phase 1b/2 study KEYNOTE-365 (NCT02861573) showed that PD-1 inhibitor pembrolizumab + enzalutamide was well tolerated and showed antitumor activity in patients with abiraterone acetate–pretreated mCRPC. Updated data after a minimum of 22 months of follow-up are presented.MethodsPatients in the prechemotherapy mCRPC state who were intolerant to ≥4 weeks‘ treatment with abiraterone acetate or for whom this treatment failed, had progressive disease ≤6 months before screening, and had ECOG PS 0-2 were enrolled. Patients received pembrolizumab 200 mg IV Q3W + enzalutamide 160 mg orally QD. Primary end points were PSA response rate (decrease ≥50% from baseline), confirmed ORR per RECIST v1.1 by blinded independent central review (BICR), and safety. Secondary end points were time to PSA progression; DCR (CR or PR of any duration + SD or non-CR/non-PD ≥6 months) and DOR per RECIST v1.1 by BICR; rPFS per PCWG3-modified RECIST v1.1 by BICR; and OS.ResultsOf 103 enrolled patients, 102 were treated. Median age was 70.0 years (range, 43–87); 29.4% of patients were PD-L1+; 37.3% had RECIST-measurable disease. Median follow-up (time from enrollment to data cutoff) was 40.2 months (range, 22.3–49.9). Confirmed PSA response rate in patients with baseline PSA measurement (N = 101) was 23.8%. Median time to PSA progression was 4.0 months (95% CI, 3.5–4.4). In 38 patients with measurable disease, ORR was 10.5% (2 CR; 2 PR). Median DOR was 11.8 months (4.3 to 38.3+ months); 1 patient had a response ≥12 months. DCR for the total population was 33.3%. Median (95% CI) rPFS was 6.0 months (4.1–6.3); rPFS at 12 months was 30.1%. Median (95% CI) OS was 20.1 months (16.9–25.2); OS at 12 months was 76.2%. Treatment-related AEs (TRAEs) occurred in 92.2% of patients; most common (≥20%) were fatigue (39.2%), nausea (21.6%), and rash (21.6%). Grade 3–5 TRAEs occurred in 42.2%, most commonly rash (7.8%) and fatigue (5.9%). Four patients died of AEs: 1 death was treatment-related (unknown cause).ConclusionsAfter a minimum follow-up of 22 months, pembrolizumab + enzalutamide continued to show antitumor activity in abiraterone acetate–pretreated mCRPC. The safety profile of pembrolizumab + enzalutamide was generally consistent with individual profiles of each agent. There was a higher incidence than typically reported for the individual agents of all-grade (21.6%) and grade 3 (7.8%) rash, which resolved with standard-of-care treatment. The combination is being further evaluated in the phase 3 study KEYNOTE-641.AcknowledgementsMedical writing and/or editorial assistance was provided by Matthew Grzywacz, PhD, of ApotheCom (Yardley, PA, USA). This assistance was funded by Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA. Funding for this research was provided by Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA.Trial RegistrationClinicalTrialsgov, identifier: NCT02861573Ethics ApprovalThe study and the protocol were approved by the Institutional Review Board or ethics committee at each site.

Results of a phase II trial of docetaxel (DOC), bevacizumab (BEV), and androgen deprivation therapy (ADT) for biochemical relapse (BCR) after definitive local therapy for prostate cancer (PC).

2014 ◽  
Vol 32 (4_suppl) ◽  
pp. 54-54
Author(s):  
Rana R. McKay ◽  
Kathryn P. Gray ◽  
Julia H. Hayes ◽  
Glenn J. Bubley ◽  
Jonathan E. Rosenberg ◽  
...  
Keyword(s):  
Specific Antigen ◽  
Local Therapy ◽  
Primary Treatment ◽  
Entire Cohort ◽  
Psa Response ◽  
Secondary Endpoints ◽  
Psa Progression ◽  
Grade 3 ◽  
Clinical Trial Information

54 Background: Despite primary treatment for localized PC, 20-30% of men experience a BCR, detected by a rise in prostate-specific antigen (PSA). Though 30% of these patients develop metastatic disease, the optimal treatment of men with BCR has yet to be determined. In this trial, we evaluate the efficacy of DOC, BEV, and ADT for men with BCR after local therapy for PC. Methods: 41 men with a BCR and PSA doubling time of ≤10 months (mos) were enrolled. Patients received 4 cycles of DOC (75 mg/m2) every 3 weeks, 8 cycles of BEV (15 mg/kg) every 3 weeks, 18 mos of a luteinizing-hormone releasing hormone (LHRH) agonist, and 15 mos of bicalutamide (50 mg daily) beginning after completion of DOC. The primary endpoint was the proportion of patients free from PSA-progression 1 year after completion of ADT. Secondary endpoints included PSA response, testosterone recovery, and toxicity. Results: Median follow-up was 27.6 mos. Median age at diagnosis was 58 years. Median PSA at diagnosis was 6.7 ng/mL, with the majority of patients (59%) having Gleason 7 disease. Most patients underwent radical prostatectomy +/- radiation therapy (n=36). At baseline, 33 men (81%) had a normal testosterone (> 240 ng/dL). The table describes the PSA responses for the entire cohort. 10 men (28%) had a normal testosterone 6 mos after completing ADT. 17 men (47%) had a normal testosterone 12 mos after completing ADT, of whom 5 (29%) had a PSA <0.2 ng/mL at that time. There were 15% grade 1, 34% grade 2, 39% grade 3, and 12% grade 4 adverse events (AEs). The most frequent grade 3-4 AEs included neutropenia (24%), febrile neutropenia (11%), and hypertension (9%). Conclusions: DOC, BEV, and ADT for BCR resulted in complete responses in 16 men (44%) 1 year after completion of therapy. Longer follow-up is needed to determine the efficacy of this regimen. Clinical trial information: NCT00658697. [Table: see text]

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