Clinical trial · Interventional
PF-03446962 in Relapsed or Refractory Urothelial Cancer
Phase II Study of the Fully Human Monoclonal Antibody Against Transforming Growth Factor-beta (TGFβ) Receptor ALK1 (PF-03446962) in Relapsed or Refractory Urothelial Cancer (UC) Failing First-line Treatment.
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
Salvage chemotherapy for advanced urothelial cancer (UC) yields suboptimal response rates of 15-40%, a median progression-free survival of 2-4 months and a median overall survival of 6 months. A rationale for targeting angiogenesis in UC is supported by preclinical evidences and early signals of clinical activity of anti-VEGF TKI as demonstrated by our group with the use of pazopanib. Despite this activity, progression inevitably occurs and mechanisms determining resistance to conventional anti-angiogenic agents are under investigation. PF-03446962 (Pfizer Inc) is a novel fully human monoclonal antibody (mAb) against ALK1 with dose-dependent antiangiogenic activity as demonstrated in nonclinical studies in a chimera mouse model bearing human tumor xenograft. The investigators suggest that PF-03446962 may increase current results for patients with advanced urothelial cancer failing upfront chemotherapy due to its mechanisms of action. Due to the lack of reliable and reproducible predictors of response as well as of imaging tools to assess tumor response, the trial will provide incorporation of 18FDG-PET/CT and contrast-enhanced ultrasound to stage and evaluate response of urothelial cancers, together with standard imaging modalities (RECIST criteria). Blood and tissue samples will be collected for translational purposes.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Transitional Cell Carcinoma of Bladder | — | UNRESOLVED | — |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| PF03446962 | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- PF03446962
- description
- Investigational study drug, administered intravenously every 2 weeks until disease progression or unacceptable toxicity.
- interventionNames
- Drug: PF03446962
Primary outcomes (1)
- measure
- Progression-free survival.
- timeFrame
- 2-month
- description
- Progression-free survival (PFS) is defined as the interval from the first dose of study drug to the date of the first documented disease progression or death for any reason, with censoring at the date of last contact for alive patients. A patient who has not progressed or died by the date of the analysis cut-off or when the patient received any further anticancer therapy would have the PFS censored at the time of last adequate tumor assessment before either cut-off date or the commencement of further anticancer therapy date, respectively.
Secondary outcomes (4)
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Age \> 18 years. * ECOG Performance status of 0 or 1. * Life expectancy of at least 12 weeks. * Measurable disease criteria (RECIST v1.1). * Histological diagnosis of urothelial cancer. * Locally advanced or metastatic disease. * Failure of at least 1 prior chemotherapy regimen for metastatic disease. * Neoadjuvant/adjuvant therapy considered if relapse occurred within 6 months of the last cycle of chemotherapy. * Adequate bone marrow, liver and renal function requirements, to be conducted within 7 days prior to screening. Exclusion Criteria: * Cardiovascular or CNS disease. * Previously untreated CNS metastases. * Active Hepatitis B, C, HIV infection. * Pregnant or breast-feeding patients. * GI abnormalities and any other clinical condition at high risk of bleeding. * Substance abuse and any other condition which may interfere with patient's participation in the study or evaluation of study results.
References
Publications (2)
- BACKGROUNDHu-Lowe DD, Chen E, Zhang L, Watson KD, Mancuso P, Lappin P, Wickman G, Chen JH, Wang J, Jiang X, Amundson K, Simon R, Erbersdobler A, Bergqvist S, Feng Z, Swanson TA, Simmons BH, Lippincott J, Casperson GF, Levin WJ, Stampino CG, Shalinsky DR, Ferrara KW, Fiedler W, Bertolini F. Targeting activin receptor-like kinase 1 inhibits angiogenesis and tumorigenesis through a mechanism of action complementary to anti-VEGF therapies. Cancer Res. 2011 Feb 15;71(4):1362-73. doi: 10.1158/0008-5472.CAN-10-1451. Epub 2011 Jan 6. PMID 21212415
- DERIVEDNecchi A, Giannatempo P, Mariani L, Fare E, Raggi D, Pennati M, Zaffaroni N, Crippa F, Marchiano A, Nicolai N, Maffezzini M, Togliardi E, Daidone MG, Gianni AM, Salvioni R, De Braud F. PF-03446962, a fully-human monoclonal antibody against transforming growth-factor beta (TGFbeta) receptor ALK1, in pre-treated patients with urothelial cancer: an open label, single-group, phase 2 trial. Invest New Drugs. 2014 Jun;32(3):555-60. doi: 10.1007/s10637-014-0074-9. Epub 2014 Feb 26. PMID 24566706