This comprehensive literature review provides an update on oral poly(ADP-ribose) polymerase (PARP) inhibitors for the treatment of breast cancer (BC). |
The review focuses on olaparib and talazoparib, PARP inhibitor monotherapies approved for patients with deleterious/suspected deleterious germline BRCA-mutated, human epidermal growth factor receptor 2-negative BC. Olaparib is approved in the USA for metastatic BC and in Europe for locally advanced/metastatic BC. Talazoparib is approved for locally advanced/metastatic BC in the USA and Europe. |
The review also discusses the investigation of PARP inhibitors for the treatment of early-stage BC, as well as in novel combinations and in other BC populations with high unmet needs, including those with triple-negative BC, somatic BRCA mutations, and mutations in other genes associated with defects in homologous recombination repair of DNA. |
1 Introduction
2 DNA Repair, PARP Inhibition, and Synthetic Lethality
3 PARP Inhibitors as Monotherapies for Locally Advanced and/or Metastatic Breast Cancer
PARP inhibitor | Clinical trial | Phase | Patient population | Study treatments, N | Study design and key endpoints/outcomes | Primary and study completion dates (actual or estimated) | FDA and EMA approval |
---|---|---|---|---|---|---|---|
FDA- and EMA-approved as single-agent therapy for BC | |||||||
Olaparib | NCT02000622 | 3 | gBRCAm, HER2– metastatic BC | Olaparib vs. TPC (2:1 ratio) N = 302 | Randomized, open-label, multicenter, international Primary endpoint: Median PFS (BICR) favored olaparib vs. TPC: 7.0 vs. 4.2 months (HR 0.58, 95% CI 0.43–0.80; p < 0.001) Median OS (final): no significant difference (19.3 months) vs. TPC (17.1 months; HR 0.90, 95% CI 0.66–1.23; p = 0.513); possible OS benefit for olaparib vs. TPC in the first-line metastatic setting (22.6 vs. 4.7 months; HR 0.51, 95% CI 0.29–0.90) ORR favored olaparib vs. TPC: 59.9% (95% CI 52.0–67.4) vs. 28.8% (95% CI 18.3–41.3) HRQoL consistently improved with olaparib vs. TPC Rate of grade ≥ 3 AEs lower with olaparib vs. TPC (38.0% vs. 49.5%) | December 2016 December 2020 | |
Olaparib Expanded [78] NCT03344965 | 2 | HER2– or HER2+ metastatic BC Cohort 1: germline mutations in non-BRCA DDR genes Cohort 2: somatic mutations in non-BRCA DDR genes or sBRCAm, with no gBRCAm | Olaparib N = 54, including 3 HER2+ Cohort 1, n = 27 Cohort 2, n = 27 | Open-label, single-arm 87% had a sBRCA1/2, PALB2, ATM, or CHEK2 mutation Primary endpoint: ORR 33% (n = 9/27) in cohort 1, 31% (n = 8/27) in cohort 2 Antitumor activity occurred in patients with sBRCAm or gPALB2m but not those with ATM or CHEK2 mutations | December 2021 December 2021 | ||
NOBROLA [79] NCT03367689 | 2 | BRCAwt, HER2–metastatic BC with HRD | Olaparib N = 39 (target) | Open-label, single-arm, multicenter, Simon’s two-stage Primary outcome: CBR Secondary outcomes: ORR, PFS, OS, AEs | July 2021 November 2021 | ||
LYNK-002 [80] NCT03742895 | 2 | HRRm or HRD, previously treated metastatic and/or unresectable solid tumors (excluding gBRCAm or sBRCAm BC) | Olaparib N = 370 (target) | Open-label, single-arm Primary outcome: ORR Secondary outcomes: DoCR, PFS, OS, AEs | February 2023 February 2023 | ||
COMETABreast [81] NCT03205761 | 2 | sBRCAm methylation, no gBRCAm metastatic TNBC | Olaparib N = 34 (target) | Open-label, single-arm, multicenter Primary outcome: ORR Secondary outcomes: CBR, response duration, OS, PFS, AEs | December 2020 December 2020 | ||
LUCY [82] NCT03286842 | 3b | gBRCAm or sBRCAm, HER2– metastatic BC | Olaparib N = 256 | Open-label, single-arm, multicenter Clinical effectiveness of olaparib in a real-world setting Primary outcome: PFS in patients with gBRCAm Secondary outcomes: OS, CRR, DoCR, AEs in gBRCAm cohort Other outcomes: PFS, OS, CRR, DoCR in sBRCAm cohort | November 2020 November 2020 | ||
Talazoparib | NCT01945775 | 3 | gBRCAm, HER2– locally advanced or metastatic BC | Talazoparib vs. TPC (2:1 ratio) N = 431 | Randomized, open-label, international Primary endpoint: Median PFS (BICR) favored talazoparib vs. TPC: 8.6 vs. 5.6 months (HR 0.54, 95% CI 0.41–0.71; p < 0.001) Median OS (final): no significant difference (19.3 months) vs. TPC (19.5 months; HR 0.85, 95% CI 0.67–1.07; p = 0.17) ORR favored talazoparib vs. TPC: 62.6% vs. 27.2% (OR 5.0, 95% CI 2.9–8.8; p < 0.001) PROs favored talazoparib vs. TPC, including improvements in HRQoL Rate of hematologic grade 3/4 AEs was higher with talazoparib vs. TPC (55% vs. 38%), and rate of non-hematologic grade 3 AEs was lower with talazoparib (32% vs. 38%) | September 2017 September 2020 | |
ABRAZO [83] NCT02034916 | 2 | gBRCAm, HER2– or HER2+ locally advanced or metastatic BC Cohort 1: platinum-sensitive Cohort 2: heavily pre-treated (≥ 3 prior therapies) | Talazoparib N = 84 Cohort 1, n = 49, including 1 HER2+ Cohort 2, n = 35, including 5 HER2+ | Open-label, parallel-assignment Overall population: 49% BRCA1, 50% BRCA2 Primary endpoint: ORR 28% (21% cohort 1, 37% cohort 2); 2 CRs, 21 PRs, 36 SD Median DoCR: 4.9 months (5.8 months cohort 1, 3.8 months cohort 2) CBR: 35% (27% cohort 1, 46% cohort 2) ORR: 26% (TNBC), 29% (HR+), 23% (BRCA1), 33% (BRCA2) Median PFS: 4.0 months (cohort 1) and 5.6 months (cohort 2) Median OS: 12.7 months (cohort 1) and 14.7 months (cohort 2) Grade ≥ 3 hematologic TEAEs: 58% (cohort 1) and 60% (cohort 2); grade ≥ 3 non-hematologic TEAEs: 27% (cohort 1) and 31% (cohort 2) Cohort 1: association between higher ORR and longer median PFS with longer platinum-free interval | September 2016 October 2018 | ||
NCT02401347 [84] | 2 | BRCAwt, HRRm, HER2– metastatic or recurrent BC | Talazoparib N = 20 BC, n = 13, including 1 TNBC | Proof-of-concept, open-label, single-arm Primary endpoint: ORR 25% CBR: 50% Talazoparib was well tolerated (5 patients required dose reduction for hematologic toxicities) | December 2021 December 2022 | ||
Not yet FDA- or EMA-approved for BC | |||||||
Niraparib | NCT01905592 | 3 | gBRCAm, HER2– locally advanced or metastatic BC | Niraparib vs. TPC (2:1 ratio) N = 206 (original target 306) | Randomized, open-label, multicenter Study prematurely closed because too many TPC-treated patients were not completing necessary assessments No longer suitable as a registration trial Primary endpoint: Median PFS (BICR), niraparib 4.1 months (95% CI 2.9–4.5) vs. TPC 3.1 months (95% CI 1.6–7.2) Median PFS (investigator assessed): niraparib 5.0 months (95% CI 4.2–5.5) vs. TPC 3.1 months (95% CI 2.7–5.1) Median OS: niraparib 14.5 months (95% CI 11.7–17.2) vs. TPC 15.8 months (95% CI 12.1–18.4) Median TTF: niraparib 4.3 months (95% CI 4.0–5.5) vs. TPC 2.6 months (95% CI 1.6–3.2) Serious AEs: 6.2% niraparib vs. 24.6% TPC | May 2018 December 2022 | – |
ABC [68] NCT02826512 | 2 | BRCA1-like, HER2– locally recurrent or metastatic BC, after ≤ 1 prior cytotoxic regimen | Niraparib N = 39 | Open-label, single-arm, feasibility Primary outcome: PFS Secondary outcome measures: ORR, DoCR, AEs | August 2021 August 2023 | ||
MK-4827-001 [69] NCT00749502 | 1 | Solid tumors including HER2– locally advanced or metastatic BC after ≤ 1 prior cytotoxic regimen | Niraparib N = 100 BC, n = 12 | Open-label, single-arm, dose-escalation Evidence of antitumor activity in BC (and ovarian cancer) with gBRCAm Of 4 patients with BC and gBRCAm who were evaluable, 2 had PRs Niraparib (300 mg/day) was well tolerated | September 2011 June 2013 | ||
Veliparib | California Cancer Consortium Trial [70] NCT01149083 | 2 | BRCAm, HER2– or HER2+ metastatic BC | Veliparib N = 44, including 1 HER2+ BRCA1, n = 22 BRCA2, n = 22 | Randomized, parallel-assignment, open-label Primary endpoint: ORR 14% (BRCA1), 36% (BRCA2) Median PFS: 5.2 months (3.6 months [BRCA1] vs. 6.6 months [BRCA2], p < 0.05) Median OS: 14.5 months (11.8 months [BRCA1] vs. 14.7 months [BRCA2], p = 0.16) | December 2020 (primary completion) | – |
NCT01853306 | 1 | Metastatic or unresectable solid tumors, including BC | Veliparib-ER and veliparib-IR N = 71 BC, n = 17 | Randomized, crossover-assignment, open-label Primary endpoint: veliparib-ER vs. -IR had an improved pharmacokinetic profile and was well tolerated Of 16 evaluable patients with BRCAm BC, 10 had PRs, including 4 confirmed PRs: ORR 25.0% 6-month TTP (in patients with BC): 53.5% | May 2017 June 2017 | ||
Rucaparib | RUBY [73] NCT02505048 | 2 | gBRCAwt, HER2– metastatic BC with HRD | Rucaparib N = 41 | Open-label, single-arm Primary endpoint: CBR 13.5% (1 CR, 3 PRs, 1 SD) Antitumor activity favored patients with high LOH (1 CR, 2 PRs) Rate of grade ≥ 3 AEs 46% | February 2019 December 2019 | – |
3.1 Olaparib in the Phase 3 OlympiAD Trial
3.2 Talazoparib in the Phase 3 EMBRACA Trial
3.3 Indirect Comparison of Olaparib and Talazoparib: OlympiAD Versus EMBRACA
4 Treatment Pathways: Germline BRCA Mutation Testing and PARP Inhibitor Therapy
5 Identification of Patients Who Could Potentially Benefit from PARP Inhibition
5.1 Issues with Uptake of BRCA Mutation Testing
5.2 Future Directions to Identify Eligible Patients
6 Overview of New Directions for PARP Inhibitors
6.1 PARP Inhibitors for Early-Stage Breast Cancer
Treatment | Clinical trial | Phase | Patient population | Study treatments, N | Study design and key endpoints/outcomes | Primary and study completion dates (actual or estimated) |
---|---|---|---|---|---|---|
Neoadjuvant setting | ||||||
Talazoparib | NCT02282345 | 1/2 | Operable, gBRCAm, HER2– BC | Talazoparib N = 33 n = 13 in the initial cohort n = 20 in the expansion cohort | Open-label, single-arm, multicenter In the initial cohort: Primary endpoint: recruitment was shown to be feasible Tumor volume decreased in all patients after 2 months of talazoparib by a median of 88% (range 30–98%) No grade 4 toxicities, and one patient required dose reduction due to grade 3 neutropenia In the expansion cohort: Primary endpoint: 10 of 19 patients (53%) achieved pCR at 6 months, before surgery One patient experienced grade 4 toxicity (thrombocytopenia), and nine patients required dose reductions | April 2020 April 2021 |
2 | gBRCAm early (stage I–III) TNBC | Talazoparib N = 61 (target of 112 evaluable patients) | Open-label, single-arm, multicenter Primary outcome: pCR (ICR) at 24 weeks Secondary outcomes: pCR (investigator assessed), RCB, OS, AEs, PROs including HRQoL | Early termination, September 2020 | ||
Niraparib | NCT03329937 | 1 | gBRCAm or sBRCAm, HER2– localized BC | Niraparib N = 21 n = 18 MRI and ultrasound data | Open-label, single-arm Primary endpoint: TRR, measured by MRI after 2 months of treatment, was 89% Most common (≥ 10%) drug-related TEAEs: nausea, fatigue, anemia, insomnia, decreased appetite Drug-related grade ≥ 3 toxicity in ≥ 10% of patients: anemia (3 patients) | January 2020 March 2020 |
Olaparib + platinum-based chemotherapy | NCT03150576 | 2/3 | TNBC and/or gBRCAm, HER2–, HR+ BC | Stages 1 and 2 randomization (1:1:1): CP, CP + olaparib from day –2 or CP + olaparib from day 3 N = 159 in stages 1 and 2 Stage 3 randomization (1:1) to either control or research arm selected in stage 2 N = 527 (target) | Randomized, three-stage, open-label Primary endpoint: stage 1 – safety; stage 2 – schedule selection; stage 3 – efficacy (pCR rate) In pooled safety analysis of stages 1 and 2, combination olaparib with neoadjuvant CP showed an acceptable and manageable toxicity profile Most common grade ≥ 3 AEs were hematologic events (neutropenia 19%, anemia 15%, and thrombocytopenia 5%) | January 2022 January 2032 |
Olaparib | 2 | Treatment-naïve BC; olaparib-treated patients had TNBC | Several treatment options investigated N = 200 Olaparib followed by chemotherapy n = 31 | Open-label, single-arm Primary outcome: predictive and prognostic value of mutations in 300 cancer-related genes, assessed in BC tissue by next-generation sequencing ORR with olaparib, 56.3% (16 out of 18 responders had HRD) After excluding 5 patients with gBRCA or gPALB2 mutations, ORR with olaparib was 51.9% | June 2020 June 2030 | |
Olaparib + paclitaxel | GeparOla [141] NCT02789332 | 2 | HER2–, operable and locally advanced BC with HRD (deleterious gBRCAm or tBRCAm and/or high HRD score) | Randomization to olaparib + P or CP followed by epirubicin + cyclophosphamide N = 107 | Randomized, open-label, multicenter Primary endpoint: pCR rate was 55.1% with olaparib combination therapy vs. 48.6% with CP pCR rates were higher with olaparib combination therapy vs. CP in patients < 40 years of age (76.2% vs. 45.5%) and in those with hormone receptor-positive tumors (52.6% vs. 20.0%) | February 2019 February 2020 |
Veliparib + standard neoadjuvant therapy | BrighTNess [142] NCT02032277 | 3 | Stage II–III TNBC | Randomization (2:1:1) in segment 1 to: CP + veliparib, CP or P; in segment 2 all patients received doxorubicin + cyclophosphamide N = 634 | Randomized, double-blind, placebo-controlled, multicenter, international Primary endpoint: pCR, 53% CP + veliparib, 58% CP, 31% P (p = 0.36 for CP + veliparib vs. CP; p < 0.0001 for CP + veliparib vs. P) Grade 3/4 AEs and serious AEs were more common in patients receiving C, with veliparib not appearing to markedly increase toxicity | March 2016 October 2020 |
Adjuvant setting (after neoadjuvant or adjuvant chemotherapy) | ||||||
Olaparib | NCT02032823 | 3 | High-risk, gBRCAm, HER2– BC | Randomization (1:1) to olaparib or placebo N = 1836 | Randomized, double-blind, parallel-group, placebo-controlled, multicenter Primary outcome: invasive DFS with up to 10 years of follow-up Secondary outcomes: OS, distant DFS, incidence of new primary cancers including contralateral BC, PK, fatigue, GI symptoms, HRQoL Other outcomes: safety, tolerability | November 2020 November 2028 |
6.2 PARP Inhibitors in Combination Therapies, Including with Immunotherapies
Treatment | Clinical trial | Phase | Patient population | Study treatments, N | Study design and key endpoints/findings | Primary and study completion dates (actual or estimated) |
---|---|---|---|---|---|---|
PARP inhibitors in combination with immunotherapies | ||||||
Niraparib + pembrolizumab | TOPACIO [129] NCT02657889 | 2 | Advanced (unresectable) metastatic TNBC | Niraparib + pembrolizumab N = 47 (efficacy) N = 55 (safety) | Open-label, single-arm, multicenter Primary endpoint: ORR 21% (47% in patients with tBRCAm) DCR: 49% (80% in patients with tBRCAm) Median PFS: 2.3 months (8.3 months in patients with tBRCAm) Most common treatment-related grade ≥ 3 AEs were anemia (18%), thrombocytopenia (15%) and fatigue (7%) | May 2018 March 2020 |
Olaparib + durvalumab | NCT02734004 | 2 | gBRCAm, HER2–metastatic BC | Olaparib + durvalumab N = 30 (efficacy) N = 34 (safety) | Open-label, single-arm, multicenter Primary endpoint: DCR 80% at 12 weeks DCR: 50% at 28 weeks Median PFS: 8.2 months Median OS: 20.5 months Median DoCR: 9.2 months Most common grade ≥ 3 AEs: anemia (n = 4), neutropenia (n = 3), pancreatitis (n = 2) | August 2022 August 2022 |
NCT03801369 [133] | 2 | BRCAwt metastatic TNBC | Olaparib induction (4 weeks) followed by olaparib + durvalumab N = 28 (target) | Open-label, single-arm Primary outcome: ORR Secondary outcomes: CBR, OS, PFS, DoCR, grade ≥ 3 acute toxicity | December 2020 December 2020 | |
DORA [134] NCT03167619 | 2 | Platinum-responsive locally advanced or metastatic TNBC | Olaparib vs. olaparib + durvalumab N = 60 (target) | Randomized, multicenter, international, maintenance Primary outcome: PFS Secondary outcomes: OS, CBR, safety | March 2021 May 2021 | |
Olaparib + atezolizumab | NCT02849496 [135] | 2 | BRCAm, non-HER2+, unresectable locally advanced unresectable or metastatic BC | Olaparib vs. olaparib + atezolizumab N = 72 (target) | Randomized, open-label, crossover Primary outcome: PFS Secondary outcomes: ORR, DoCR | August 2021 (primary completion) |
Olaparib + pembrolizumab | KEYLYNK-007 [164] NCT04123366 | 2 | Previously treated metastatic and/or unresectable solid tumor with HRRm or HRD, including BC | Olaparib + pembrolizumab N = 300 (target) | Open-label, single-arm Primary outcome: ORR Secondary outcomes: DoCR, PFS, OS | December 2023 December 2023 |
Olaparib + pembrolizumab | KEYLYNK-009 [156] NCT04191135 | 2/3 | Locally recurrent inoperable or metastatic TNBC | Randomization (1:1) to olaparib + pembrolizumab or carboplatin, gemcitabine + pembrolizumab; after induction with chemotherapy N = 932 (target) | Randomized, open-label Primary outcomes: PFS (BICR), OS Secondary outcomes: PFS and OS in patients with BRCAm, AEs, HRQoL | January 2026 January 2026 |
Talazoparib + avelumab | NCT03565991 | 2 | BRCAm or ATM-mutated, locally advanced or metastatic solid tumorsa | Talazoparib + avelumab N = 202 | Open-label, single-arm, multicenter, international Primary outcome: confirmed OR (BICR) Secondary outcomes: safety, confirmed OR (investigator assessed), time to tumor response, duration of response, PFS, OS, PK, potential predictive biomarkers | March 2021 December 2022 |
TALAVE [132] NCT03964532 | 1/2 | HER2– advanced BC | Talazoparib induction (4 weeks) followed by talazoparib + avelumab N = 24 (target) | Open-label, multicenter Primary objective: safety and tolerability of combination Secondary objectives: ORR, OS, PFS, DoCR, DCR | December 2020 December 2021 | |
PARP inhibitors in other combinations | ||||||
Veliparib + platinum-based chemotherapy | NCT02163694 | 3 | gBRCAm, HER2– locally advanced (unresectable) or metastatic BC | Randomization (2:1) to CP + veliparib or CP + placebo N = 509 | Randomized, double-blind, placebo-controlled Primary endpoint: median PFS (investigator assessed) 14.5 months for CP + veliparib vs. 12.6 months for CP (HR 0.71, 95% CI 0.57–0.88; p = 0.002) 3-year PFS: 26% vs. 11% Median OS (interim): 33.5 vs. 28.2 months Serious AEs: 33.1% veliparib, 30.9% control Prespecified subgroup analysis in patients with no previous cytotoxic chemotherapy for metastatic disease Median PFS: 16.6 months for CP + veliparib vs. 13.1 months for CP | April 2019 November 2021 |
Veliparib + carboplatin | California Cancer Consortium Trial [70] NCT01149083 | 1 | BRCAm, HER2– or HER2+ metastatic BC | Veliparib + carboplatin N = 27, including 2 HER2+ | Primary endpoints: DLTs were nausea, dehydration, and thrombocytopenia (MTD: veliparib 150 mg twice daily and carboplatin [area under the curve of 5]) 75% of patients experienced treatment-altering cytopenia (cycles 1–3) ORR: 56% (53% for ER+/PgR+, 63% for ER–/PgR–) CBR: 59% Median PFS: 8.7 months (8.5 months [BRCA1] vs. 9.5 months [BRCA2]) Median OS: 18.8 months (21.8 months [BRCA1] vs. 17.6 months [BRCA2]) | December 2020 (primary completion) |
Olaparib + trabectedin | NCT03127215 [157] | 2 | Locally advanced or metastatic solid tumors with HRD | Randomization (1:1) to olaparib + trabectedin or physician’s choice N = 90 (target) | Randomized, open-label, parallel-assignment, multicenter Primary outcome: DCR and TRR at 16 weeks Secondary outcomes: PFS, OS, quality of life, safety | March 2020 March 2021 |
Olaparib + sapacitabine | NCT03641755 [159] | 1/2 | gBRCAm metastatic or unresectable BC | Olaparib + sapacitabine N = 64 (target) | Open-label, single-arm Primary outcomes: MTD, RP2D, ORR Secondary outcomes: PFS, DLT | June 2020 June 2025 |
Olaparib + DNA damage response inhibitors | VIOLETTE [160] NCT03330847 | 2 | HRRm, HER2–metastatic TNBC | Randomization (1:1:1) to olaparib + AZD6738 (an ATR inhibitor), olaparib + adavosertib (a Wee1 inhibitor) or olaparib N = 450 (target) | Randomized, open-label, multicenter Primary outcome: PFS (BICR) Secondary outcomes: ORR, DoCR, change in tumor size, OS, safety | March 2023 March 2023 |
Olaparib + trastuzumab | OPHELIA [162] NCT03931551 | 2 | gBRCAm or HRD, HER2+, locally regionally recurrent or metastatic BC | Olaparib + trastuzumab N = 33 (target) | Open-label, single-arm, multicenter, two-cohort, Simon’s two-stage Primary outcomes: ORR, PFS Secondary outcomes: CBR, OS, safety, quality of life | September 2022 September 2022 |
Olaparib + radiation therapy | RadioPARP [165] NCT03109080 | 1 | TNBC inoperable after neoadjuvant chemotherapy or with residual disease after surgery | Olaparib + radiation therapy N = 24 | Open-label, single-arm Primary endpoint: olaparib escalated to target dose (200 mg twice daily), without DLT Most olaparib-related AEs were grade 1 or 2 Two patients (8.7%) experienced acute grade 3 dermatitis The only grade 3 or 4 hematologic AE was lymphopenia (46%) No grade 4 AEs related to radiation therapy | April 2020 April 2022 |
Olaparib + hyperthermia | Pilot study [166] NCT03955640 | 1 | gBRCAwt, HER2– or HER2+ locally advanced or metastatic BC with chest wall recurrences | Olaparib at three escalating doses + chest wall hyperthermia twice a week N = 12 (target) | Open-label, single-arm Primary outcome: incidence of AEs (to determine DLT and MTD of olaparib) Secondary outcomes: PFS, ORR, quality of life, pain scores | October 2022 October 2023 |
Talazoparib + ZEN003694 | NCT03901469 [161] | 2 | Metastatic or recurrent TNBC | Talazoparib + ZEN003694 N = 49 (target) | Open-label, single-arm, two-part Part 1, dose escalation; part 2, Simon’s two-stage Primary outcomes, part 1: incidence of DLT, safety Primary outcomes, part 2: ORR, safety | September 2020 January 2021 |
Talazoparib + gedatolisib | NCT03911973 [163] | 1/2 | gBRCAwt, metastatic or unresectable TNBC or gBRCAm HER2– metastatic or unresectable BC | Talazoparib + gedatolisib N = 54 (target) | Open-label, single-arm Primary outcomes: MTD, ORR Secondary outcomes: PFS, DoCR, CBR, OS, safety | May 2021 May 2022 |
Rucaparib + lucitanib or sacituzumab govitecan | SEASTAR [167] NCT03992131 | 1/2 | Advanced or metastatic solid malignancy, including TNBC | Rucaparib + lucitanib or sacituzumab govitecan N = 329 (target; unclear how many will have TNBC) | Open-label, parallel-arm Primary outcomes: MTD, safety, ORR Secondary outcomes: PFS, DoCR, OS, pharmacokinetics | October 2023 March 2024 |