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Phase 2 Completed N=61 Treatment

A Study of TAK-981 Given With Pembrolizumab in Participants With Select Advanced or Metastatic Solid Tumors

Advanced or Metastatic Solid Tumors
Source: ClinicalTrials.gov NCT04381650 ↗
Enrolled (actual)
61
Serious AEs
46.0%
Results posted
Dec 2025
Primary outcomePrimary: Phase 1: Number of Participants With One or More Treatment Emergent Adverse Events (TEAEs) — 3; 6; 33; 19 Participants

Summary

TAK-981 is being tested in combination with pembrolizumab to treat participants who have select advanced or metastatic solid tumors. The study aims are to evaluate the safety, tolerability, and preliminary efficacy of TAK-981 in combination with pembrolizumab. Participants will be on this combination treatment for 21-day cycles. They will continue with this treatment for up to 24 months or until participants meet any discontinuation criteria.

Outcome Measures

OutcomeResultp-value
PRIMARY
Phase 1: Number of Participants With One or More Treatment Emergent Adverse Events (TEAEs)
3; 6; 33; 19
PRIMARY
Phase 1: Number of Participants With Dose Limiting Toxicities (DLTs)
0; 0; 2; 1
PRIMARY
Phase 1: Number of Participants With Grade 3 or Higher Treatment Emergent Adverse Events (TEAEs)
0; 2; 20; 15
PRIMARY
Phase 1: Number of Participants With One or More Serious Adverse Events (SAEs)
0; 3; 17; 10
PRIMARY
Phase 1: Number of Participants With One or More TEAEs Leading to Dose Modifications and Treatment Discontinuation
0; 3; 22; 11; 0; 3
PRIMARY
Phase 1: Number of Participants With Clinically Significant Laboratory Values
1; 3; 7; 6; 1; 1
PRIMARY
Phase 2: Overall Response Rate (ORR) as Assessed by the Investigator According to RECIST, Version 1.1
20; 0; 30; 0; 25; 7.7
SECONDARY
Phase 1: Cmax: Maximum Observed Plasma Concentration for TAK-981
335; 728; 888; 1290; 280; 448
SECONDARY
Phase 1: Tmax: Time to Reach the Maximum Plasma Concentration (Cmax) for TAK-981
1.22; 1.27; 1.17; 1.20; 1.18; 1.41
SECONDARY
Phase 1: AUC0-t: Area Under the Plasma Concentration-time Curve From Time 0 to Time t Over the Dosing Interval for TAK-981
880; 1370; 1950; 2580; 814; 976
SECONDARY
Phase 1: AUC∞: Area Under the Plasma Concentration-time Curve From Time 0 to Infinity for TAK-981
909; 1400; 2020; 2660; 845; 1010
SECONDARY
Phase 1: t1/2z: Terminal Disposition Phase Half-life for TAK-981
5.88; 5.58; 5.72; 6.79; 5.83; 5.68
SECONDARY
Phase 1: CL: Total Clearance After Intravenous Administration for TAK-981
51.1; 47.2; 51.3; 51.0; 51.7; 62.5
SECONDARY
Phase 1: Vss: Volume of Distribution at Steady State After Intravenous Administration for TAK-981
312; 181; 240; 240; 323; 314
SECONDARY
Phases 1 and 2: Disease Control Rate (DCR)
33.3; 50.0; 30.3; 44.4; 80.0; 62.5
SECONDARY
Phases 1 and 2: Durable Response Rate (DRR)
0; 16.7; 6.1; 0; 10.0; 0
SECONDARY
Phases 1 and 2: Duration of Response (DOR)
17.12; 7.39; 3.71; 7.62; NA; NA
SECONDARY
Phases 1 and 2: Progression-free Survival (PFS)
2.00; 4.21; 1.99; 2.11; 3.71; 4.59
SECONDARY
Phases 1 and 2: Time to Response (TTR)
4.17; NA; NA; 4.01; 6.01; NA
SECONDARY
Phases 1 and 2: Time to Progression (TTP)
2.00; 4.21; 2.07; 2.07; 3.71; 4.01
SECONDARY
Phase 2: Overall Survival (OS)
NA; 10.12; 14.55; NA; NA; NA
SECONDARY
Fold Change From Baseline in TAK-981-/Small Ubiquitin-like Modifier (SUMO) Adduct Formation in Peripheral Blood Lymphocytes
8.1; 7.0; 8.5; 8.4; 5.1; 5.0
SECONDARY
Fold Change From Baseline in SUMO 2/3 Inhibition in Peripheral Blood Lymphocytes
0.7; 0.6; 0.6; 0.5; 0.8; 0.6
SECONDARY
Phase 2: Percentage of Participants With One or More Treatment Emergent Adverse Events (TEAEs)
100; 100; 100; 100; 100; 93.3
SECONDARY
Phase 2: Number of Participants With Grade 3 or Higher Treatment Emergent Adverse Events (TEAEs)
7; 5; 18; 8; 14; 4
SECONDARY
Phase 2: Number of Participants With One or More TEAEs Leading to Dose Modifications and Treatment Discontinuation
11; 6; 15; 5; 15; 6

Eligibility Criteria

Inclusion Criteria

  • Has a histologically or cytologically documented, advanced (metastatic and/or unresectable) cancer as listed below that is incurable: Note: Prior neoadjuvant or adjuvant therapy included in initial treatment may not be considered first- or later-line standard of care treatment unless such treatments were completed less than 12 months prior to the current tumor recurrence.

A. Non-squamous NSCLC for which prior standard first-line treatment containing an anti-programmed cell death protein 1/programmed cell death protein 1 ligand (PD-1/PD-L1) checkpoint inhibitor (CPI) alone or in combination has failed and that has progressed on no more than 1 prior systemic therapy. In Phase 2, participants with nonsquamous NSCLC must have not received more than 1 prior systemic therapy and must not have presented with disease progression during the first 6 months of treatment with first-line CPI/anti-PD-(1/L1)-containing therapy.

Note: In Phase 1, participants with nonsquamous NSCLC and known driver mutations/genomic aberrations (e.g., epidermal growth factor receptor (EGFR), B-Raf proto-oncogene mutation V600E [BRAF V600E], and ROS proto-oncogene 1 [ROS1] sensitizing mutations, neurotrophic receptor tyrosine kinase [NRTK] gene fusions, and anaplastic lymphoma kinase [ALK] rearrangements) must have also shown progressive disease after treatment with a commercially available targeted therapy. In Phase 2, participants with driver mutations are not eligible.

B. CPI-naive cervical cancer (squamous cell carcinoma, adenosquamous carcinoma or adenocarcinoma of the cervix) participants for whom prior standard first-line treatment has failed and who have received no more than 1 prior systemic line of therapy for recurrent or Stage IVB cervical cancer. Note: The following cervical tumors are not eligible: minimal deviation/adenoma malignum, gastric-type adenocarcinoma, clear-cell carcinoma, and mesonephric carcinoma. Histologic confirmation of the original primary tumor is required via pathology report. Note: First-line treatment must have consisted of platinum-containing doublet. Chemotherapy administered concurrently with primary radiation (e.g., weekly cisplatin) is not counted as a systemic chemotherapy regimen.

C. CPI-naïve microsatellite stable-colorectal cancer (MSS-CRC) participants for whom prior standard first-line treatment has failed and who have progressed on no more than 3 chemotherapy regimens.

Note: Participants must have received prior treatment with fluoropyrimidine-, oxaliplatin-, and irinotecan-containing regimens if indicated.

D. Unresectable Stage III or Stage IV cutaneous melanoma that has not received prior therapy in the metastatic setting.

Note: Participants with acral melanoma are not eligible. Participants who have presented with disease relapse after ≥6 months of the last dose of CPI or BRAF-mitogen-activated protein kinase kinase (MEK) inhibitor in the adjuvant setting are eligible.

E. Squamous NSCLC for which prior standard first-line treatment containing an anti-PD-(1/L1) checkpoint inhibitor alone or in combination has failed. Participant must have not received more than 1 prior systemic therapy and must not have presented with disease progression during the first 6 months of treatment with first-line CPI/anti-PD-(1/L1)-containing therapy.

F. Squamous or nonsquamous NSCLC for which prior standard first-line treatment containing an anti-PD-(1/L1) checkpoint inhibitor alone or in combination has failed within 6 months from the initiation of the CPI. Participants must not have received more than 1 prior systemic therapy in the metastatic setting.

Note: Participants with driver mutations are not eligible.

  • Has at least 1 radiologically measurable lesion based on RECIST, Version 1.1. Tumor lesions situated in a previously irradiated area are considered measurable if progression has been demonstrated in such lesions.
  • Has a performance status of 0 or 1 on the Eastern Cooperative Group Onco
View full record on ClinicalTrials.gov →

Data sourced from ClinicalTrials.gov (NCT04381650). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.

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