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A Phase 1 Study Of Talazoparib, PARP Inhibitor, In Japanese Patients With Advanced Solid Tumors

A PHASE 1 STUDY OF THE SAFETY, PHARMACOKINETICS AND ANTI-TUMOR ACTIVITY OF TALAZOPARIB, POLY (ADP-RIBOSE) POLYMERASE (PARP) INHIBITOR, IN JAPANESE PATIENTS WITH ADVANCED SOLID TUMORS

Status
Active, not recruiting
Phases
Phase 1
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2080223717
Enrollment
26
Registered
2017-11-15
Start date
2017-11-30
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Solid tumor Breast cancer

Interventions

investigational material(s) Generic name etc : Talazoparib INN of investigational material : Talazoparib Therapeutic category code : 429 Other antitumor agents Dosage and Administration for Investigat

Sponsors

Pfizer R&D Japan G.K.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: [Dose Escalation Part] Inclusion Criteria: *Histological or cytological diagnosis of locally advanced or metastatic solid tumor that is resistant to standard therapy or for which no standard therapy is available. *ECOG Performance Status 0 or 1. *Adequate Bone Marrow, Renal and Liver Function. [Dose Expansion Part] Inclusion Criteria: *Histologically or cytologically confirmed carcinoma of the breast. *Locally advanced breast cancer that is not amenable to curative radiation or surgery and/or metastatic disease. *Documentation of a deleterious, suspected deleterious, or pathogenic germline BRCA1 or BRCA2 mutation by Myriad Genetics' BRACAnalysis CDx test. *No more than 3 prior chemotherapy-inclusive regimens for locally advanced or metastatic disease. *Have measurable lesion by the RECIST v.1.1. *ECOG Performance Status 0-2. Adequate Bone Marrow, Renal and Liver Function.

Exclusion criteria

Exclusion criteria: [Dose Escalation Part] Exclusion Criteria: *Patients with known symptomatic brain metastases requiring steroids. *Current use of a strong P-gp inhibitor, strong P-gp inducer, or strong inhibitor of BCRP within 1 week or 5 half lives which ever is longer prior to the first dose of study treatment. *Fertile male patients and female patients of childbearing potential who are unwilling or unable to use 2 highly effective methods of contraception. [Dose Expansion Part] Exclusion Criteria: *First-line locally advanced or metastatic breast cancer with no prior neoadjuvant and adjuvant chemotherapy. *Prior treatment with a PARP inhibitor. *Objective disease progression while receiving platinum chemotherapy administered for locally advanced or metastatic disease. *HER2 positive breast cancer. *Active inflammatory breast cancer. *Central nervous system (CNS) metastases. *Current or anticipated use within 7 days prior to the first dose of study treatment, or anticipated use during the study of strong P-gp inhibitors. *Fertile male patients and female patients of childbearing potential who are unwilling or unable to use 2 highly effective methods of contraception.

Design outcomes

Primary

MeasureTime frame
Safety Efficacy Dose Escalation: Dose-Limiting Toxicities (28 days from baseline) Doaw Expansion: Confirmed Objective Response (From baseline until disease progression or death)

Secondary

MeasureTime frame
Safety Efficacy Parmacokinetics Dose Escalation: - Cmax, AUC, t1/2, Tmax, Ctrough - OR, PFS - AE Dose Expansion: - Ctrough - TTR, DC, PFS, OS - AE

Countries

Japan

Contacts

Public ContactClinical Trials Information Desk

Pfizer R&D Japan G.K.

clinical-trials@pfizer.com+81-3-5309-7000

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026