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Erdafitinib for the Treatment of Patients With Castration-Resistant Prostate Cancer

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ClinicalTrials.gov Identifier: NCT04754425
Recruitment Status : Recruiting
First Posted : February 15, 2021
Last Update Posted : October 14, 2022
Information provided by (Responsible Party):
M.D. Anderson Cancer Center

Brief Summary:
This phase II trial studies the effect of erdafitinib in treating patients with prostate cancer that grows and continues to spread despite the surgical removal of the testes or drugs to block androgen production (castration-resistant). Erdafitinib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Giving erdafitinib may help control disease in patients with castration-resistant prostate cancer. In addition, studying samples of blood, tissue, plasma, and bone marrow from patients with castration-resistant prostate cancer in the laboratory may help doctors learn more about changes that occur in deoxyribonucleic acid (DNA) and identify biomarkers related to cancer.

Condition or disease Intervention/treatment Phase
Castration-Resistant Prostate Carcinoma Castration-Resistant Prostate Carcinoma Refractory to Second-Generation Androgen Receptor Axis-Targeted Agents Metastatic Malignant Neoplasm in the Bone Metastatic Prostate Adenocarcinoma Metastatic Prostate Small Cell Neuroendocrine Carcinoma Stage IV Prostate Cancer AJCC v8 Stage IVA Prostate Cancer AJCC v8 Stage IVB Prostate Cancer AJCC v8 Procedure: Biopsy Procedure: Biospecimen Collection Drug: Erdafitinib Phase 2

Detailed Description:


I. To evaluate efficacy of erdafitinib in subjects with advanced prostate cancer who have progressed on a second-generation androgen receptor (AR)-targeting agents (SART).


I. To evaluate the objective response rate II. To measure Time on Treatment (ToT) as a surrogate of clinical efficacy and Progression-Free Survival (PFS) III. To measure PFS. IV. To correlate bone specific alkaline phosphatase (BAP) modulation with response, ToT and PFS.

V. To correlate prostate specific antigen (PSA) modulation with response, ToT and PFS.

VI. To characterize the safety profile of subjects treated with erdafitinib. VII. To measure overall survival. VIII. To collect and archive bone marrow biopsies and aspirates, serum and plasma in study patients for later hypothesis generating associations.


I. To evaluate DNA, ribonucleic acid (RNA), or protein biomarkers in tissue and blood samples which potentially predict tumor response or resistance to erdafitinib.


Patients receive erdafitinib orally (PO) once daily (QD) on days 1-21. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients may also undergo collection of blood and bone marrow via biopsy and aspirates.

After completion of study treatment, patients are followed up at 30 days, every 16 weeks for 1 year, and then every 6 months thereafter.

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 40 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Study of Erdafitinib in Castration-Resistant Prostate Cancer Patients Evaluating Markers of Bone Remodeling and FGF Signaling in Plasma and Bone Marrow
Actual Study Start Date : July 15, 2021
Estimated Primary Completion Date : June 30, 2026
Estimated Study Completion Date : June 30, 2026

Arm Intervention/treatment
Experimental: Treatment (erdafitinib, biospecimen collection)
Patients receive erdafitinib PO QD on days 1-21. Cycles repeat every 21 days in the absence of disease progression or unacceptable toxicity. Patients may also undergo collection of blood and bone marrow via biopsy and aspirates.
Procedure: Biopsy
Undergo biopsy
Other Names:
  • Bx

Procedure: Biospecimen Collection
Undergo collection of blood and bone marrow

Drug: Erdafitinib
Given PO
Other Names:
  • Balversa
  • JNJ-42756493

Primary Outcome Measures :
  1. Bone specific alkaline phosphatase (BAP) modulation [ Time Frame: Up to 5 years ]
    Will assess modulation of BAP under the influence of treatment. Calculated as the maximal percentage change (decrease versus increase) on treatment. BAP in blood samples will be used for the primary analysis. Proportion of patients with BAP reduction along with the 95% confidence interval (95% CI) will be estimated.

Secondary Outcome Measures :
  1. Overall response rate [ Time Frame: Up to 5 years ]
    Defined as (a) the proportion of subjects with soft tissue disease who achieve complete response or partial response, as assessed per Response Evaluation Criteria in Solid Tumors (RECIST) version (v)1.1 by the investigator and (b) the proportion of subjects with improvement in bone imaging as assessed by the principal investigator. Will be estimated with proportion and its corresponding 95% CI.

  2. Time on treatment [ Time Frame: Duration in weeks/months from the time of treatment start until the patient goes off treatment for any reason, assessed up to 5 years ]
    Measured as a surrogate of clinical efficacy and progression-free survival (PFS). Will be estimated using the method of Kaplan and Meier and the effects of potential.

  3. Progression-free survival [ Time Frame: Duration in weeks/months from the time of treatment start to the date of disease progression or death, whichever is reported first, assessed up to 5 years ]
    Will be estimated using the method of Kaplan and Meier and the effects of potential.

  4. Prostate specific antigen modulation [ Time Frame: Up to 5 years ]
    Calculated as the maximal percentage change (decrease versus increase) on treatment.

  5. Incidence of adverse events [ Time Frame: Up to 5 years ]
    Will be reported by their National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0 term by grade and attribution.

  6. Overall survival [ Time Frame: Duration in weeks/months from the time of treatment start to the date of death, assessed up to 5 years ]
    Will be estimated using the method of Kaplan and Meier and the effects of potential.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age >= 18 years
  • Histologically proven adenocarcinoma or small cell of the prostate with evidence for skeletal metastases on bone scan and/or computed tomography (CT)/positron emission tomography (PET)/magnetic resonance imaging (MRI) scan. Eastern Cooperative Oncology Group (ECOG) performance status =< 2
  • Serum testosterone levels =< 50 ng/ml and maintenance of castration with luteinizing hormone-releasing hormone (LHRH) agonist/antagonist or orchiectomy
  • Patients must have documented evidence of progressive disease as defined by any of the following:

    • PSA progression: minimum of 2 rising values (3 measurements) obtained a minimum of 7 days apart with the last result being at least >= 1.0 ng/mL
    • New or increasing non-bone disease (Response Evaluation Criteria in Solid Tumors [RECIST] 1.1 criteria)
    • Positive bone scan with 2 or more new lesions (Prostate Cancer Working Group 3 [PCWG3])
  • Prior treatment with a second-generation AR-targeting agent (e.g. abiraterone acetate, enzalutamide, apalutamide) is required. Patients may have received up to two such agents
  • Patients may have received prior treatment with immunotherapies (sipuleucel-T, checkpoint immunotherapies) or bone targeting therapies (radium-223)
  • Both chemotherapy-naive and patients previously treated with chemotherapy are eligible. Chemotherapy pretreated patients may have received a maximum of two prior systemic cytotoxic chemotherapies completed at least 3 weeks prior to initiation of study treatment
  • Hemoglobin >= 8.0 g/dL
  • Platelet count >= 75,000/uL
  • Absolute neutrophil count (ANC) >= 1,500/mm^3
  • Calculated creatinine clearance (Cockcroft-Gault Equation) >= 40 mL/min
  • Serum potassium >= institutional lower limit of normal (ILLN)
  • Serum magnesium >= ILLN
  • Serum albumin >= 3.0 g/dL
  • Serum bilirubin < 1.5 x institutional upper limit of normal (IULN) (except for patients with known Gilbert's disease)
  • Serum aspartate aminotransferase (AST) or alanine aminotransferase (ALT) < 2.5 x IULN for patients without liver metastases. For patients with liver metastases AST or ALT < 5 x IULN is allowed
  • Able to swallow study drugs whole as a tablet/capsule
  • Patients must agree to tissue and blood collection for correlative studies at the specified time points
  • Male subject with a female partner of childbearing potential or pregnant must agree to use two acceptable methods of contraception and not to donate sperm from time of screening until 3 months after the last dose of study treatments

Exclusion Criteria:

  • Radiation therapy to primary tumor or metastatic sites within 2 weeks of cycle 1, day 1
  • Treatment with any other investigational agent or participation in another clinical study with therapeutic intent within 30 days prior to randomization
  • A malignancy (other than the one treated in this study) which required radiotherapy or systemic treatment within the past 1 year, or has a >= 30% probability of recurrence within 24 months (except for non-melanoma skin cancer or Ta urothelial carcinomas)
  • Chronically uncontrolled hypertension, defined conventionally as consistent systolic pressures above 160 or diastolic pressures above 100 despite anti-hypertensive therapy. Note that this is NOT a criterion related to particular blood pressure (BP) results at the time of assessment for eligibility, nor does it apply to acute BP excursions that are related to iatrogenic causes, acute pain or other transient, reversible causes. (For example doctor's visit related stress i.e. "white coat syndrome")
  • Eye conditions likely to increase the risk of eye toxicity including

    • Corneal or retinal abnormality likely to increase the risk of eye toxicity, or lens conditions such as: untreated mature or hypermature senile cataract, affecting visual acuity that impair the ability to interpret the Amsler grid test
    • History of central serous retinopathy (CSR) or retinal vascular occlusion (RVO)
    • Active wet, age-related macular degeneration (AMD)
    • Diabetic retinopathy with macular edema (non-proliferative)
    • Uncontrolled glaucoma (per local standard of care)
    • Corneal pathology such as keratitis, keratoconjunctivitis, keratopathy, corneal abrasion, inflammation or ulceration
  • Any underlying medical or psychiatric condition, which in the opinion of the investigator, will make the administration of study drug hazardous or obscure the interpretation of adverse events
  • History of uncontrolled cardiovascular disease including:

    • Unstable angina, myocardial infarction, ventricular fibrillation, Torsades de Pointes, cardiac arrest, or known congestive heart failure class III-V within the preceding 3 months; cerebrovascular accident or transient ischemic attack within the preceding 3 months
    • Mobitz II second degree heart block or third degree heart block
    • Corrected QT interval (QTc) prolongation as confirmed by triplicate assessment at screening (Fridericia; QTc > 480 milliseconds)
    • Pulmonary embolism or other venous thromboembolism (VTE) within the preceding 2 months
  • Known active autoimmune deficiency syndrome (AIDS) (human immunodeficiency virus [HIV] infection), unless the subject has been on a stable anti-retroviral therapy regimen for the last 6 months or more, has had no opportunistic infections in the last 6 months, and has CD4 count > 350
  • Known active hepatitis B or C infection (subjects with history of hepatitis C infection but negative hepatitis C virus polymerase chain reaction ([PCR] test and subjects with hepatitis B with positive hepatitis B surface antibody are allowed)
  • Not recovered from reversible toxicity of prior anticancer therapy (except toxicities which are not clinically significant such as alopecia, skin discoloration, grade 1 neuropathy, grade 1-2 hearing loss)
  • Impaired wound healing capacity defined as skin/decubitus ulcers, chronic leg ulcers, known gastric ulcers, or unhealed incisions
  • Major surgery within 4 weeks before randomization
  • Untreated symptomatic spinal cord compression

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04754425

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United States, Texas
M D Anderson Cancer Center Recruiting
Houston, Texas, United States, 77030
Contact: Paul Corn, MD    713-792-2830    pcorn@mdanderson.org   
Principal Investigator: Paul Corn, MD         
Sponsors and Collaborators
M.D. Anderson Cancer Center
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Principal Investigator: Paul Corn M.D. Anderson Cancer Center
Additional Information:
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Responsible Party: M.D. Anderson Cancer Center
ClinicalTrials.gov Identifier: NCT04754425    
Other Study ID Numbers: 2020-0953
NCI-2021-00663 ( Registry Identifier: CTRP (Clinical Trial Reporting Program) )
2020-0953 ( Other Identifier: M D Anderson Cancer Center )
First Posted: February 15, 2021    Key Record Dates
Last Update Posted: October 14, 2022
Last Verified: October 2022

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Prostatic Neoplasms
Carcinoma, Neuroendocrine
Carcinoma, Small Cell
Neoplasms, Glandular and Epithelial
Neoplasms by Histologic Type
Genital Neoplasms, Male
Urogenital Neoplasms
Neoplasms by Site
Prostatic Diseases
Neuroendocrine Tumors
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Neoplasms, Nerve Tissue