Testing the Addition of Pedmark to Cisplatin Chemotherapy for Reducing Drug-Induced Ear Damage in Men With Stage II-III Metastatic Testicular Germ Cell Tumors

Recruiting now · Phase 1

Conditions studied: Hearing Loss, Metastatic Malignant Germ Cell Tumor, Metastatic Malignant Nongerminomatous Germ Cell Tumor, Metastatic Malignant Testicular Non-Seminomatous Germ Cell Tumor, Metastatic Testicular Seminoma, Stage II Testicular Cancer AJCC v8, Stage III Testicular Cancer AJCC v8

In brief

This phase I trial evaluates whether adding Pedmark to standard of care cisplatin-based chemotherapy reduces drug-induced ear damage (ototoxicity) in men with stage II-III testicular germ cell tumors that have spread from where they first started (primary site) to other places in the body (metastatic). Cisplatin is in a class of medications known as platinum-containing compounds. It works by killing, stopping or slowing the growth of tumor cells. Cisplatin-induced ototoxicity remains a major concern in adult patients with germ cell tumors as nearly four out of five patients develop hearing loss after treatment. Cisplatin is thought to cause ear damage by the production of chemically reactive molecules called reactive oxygen species. These molecules can cause damage when their levels get too high. Pedmark may reduce the negative side effects of cisplatin by neutralizing these reactive molecules. Pedmark has been approved for reducing the risk of cisplatin-induced ototoxicity in pediatric patients and older patients with solid tumors that haven't spread to other parts of the body. Adding Pedmark to cisplatin-based chemotherapy treatment may reduce ototoxicity in adult men with stage I-III testicular metastatic germ cell tumors.

Key facts

Study ID

NCT07218913

Run by

City of Hope Medical Center

People needed

44

Starts

2026-02-19

Expected to finish

2031-01-22

Last updated by the study team

2026-04-17

Who can join

Age: 18 and older. Sex: male. Healthy volunteers: not accepted.

You may qualify if…

• Documented informed consent of the participant and/or legally authorized representative
• Assent, when appropriate, will be obtained per institutional guidelines
• Willing and able to sign informed consent form
• Willing and able to participate in baseline and serial audiometry exams
• Age: ≥ 18 years
• Eastern Cooperative Oncology Group (ECOG) of 0 or 1 or Karnofsky score ≥ 70
• Histologically confirmed germ cell tumor (seminoma or non-seminoma)
• Presence of metastatic disease (stage II or III)
• Fully recovered from the acute toxic effects (except alopecia) to ≤ grade 1 to prior anti-cancer therapy
• Receiving first or second line cisplatin-based chemotherapy
• Planned cumulative cisplatin dose of ≥ 300mg/m\^2 (including previous treatment)
• Measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1
• Absolute neutrophil count (ANC) ≥ 1,500/mm\^3
• Platelets ≥ 100,000/mm\^3
• NOTE: Platelet transfusions are not permitted within 14 days of platelet assessment unless cytopenia is secondary to disease involvement
• Hemoglobin ≥ 9g/dL
• NOTE: Red blood cell transfusions are not permitted within 14 days of hemoglobin assessment unless cytopenia is secondary to disease involvement
• Total bilirubin ≤ 1.5 X upper limit of normal (ULN)
• Patients with known Gilbert disease who have serum bilirubin level < 3 x ULN may be enrolled
• Aspartate aminotransferase (AST) ≤ 3.0 x ULN
• Alanine aminotransferase (ALT) ≤ 3.0 x ULN
• Creatinine clearance of ≥ 60 mL/min per the Cockcroft-Gault formula or serum creatinine ≤ 1.5 x ULN
• * If not receiving anticoagulants: International normalized ratio (INR) OR prothrombin (PT) ≤ 1.5 x ULN
• If on anticoagulant therapy: PT must be within therapeutic range of intended use of anticoagulants
• * If not receiving anticoagulants: Activated partial thromboplastin time (aPTT) ≤ 1.5 x ULN

You may not qualify if…

• Any cisplatin-based therapies within 4 weeks prior to initiation of study treatment
• If cisplatin infusion during study is planned to be longer than 6 hours, as Pedmark safety and efficacy has not been established when administered following longer cisplatin infusions
• Chronic steroid use, defined as greater than prednisone 5 mg daily for longer than 21 days (steroids used as antiemetic during treatment is permitted)
• Concurrent use of other ototoxic drugs other than cisplatin (loop diuretics, aminoglycosides, etc)
• Patient must adhere to low sodium diet given other comorbidities
• History of severe hypersensitivity to sodium thiosulfate or any components such as sulfites or thiols
• Known symptomatic brain metastases, leptomeningeal carcinomatosis, or prior cranial irradiation
• Deemed cisplatin ineligible due to poor performance status, cardiac dysfunction, renal insufficiency, or significant peripheral neuropathy
• Greater than or equal to moderate hearing loss (HL) at baseline per World Health Organization (WHO) classification
• Unstable cardiac disease as defined by one of the following:
• Cardiac events such as myocardial infarction (MI) within the past 6 months
• NYHA (New York Heart Association) heart failure class III-IV
• Uncontrolled atrial fibrillation or hypertension
• Prospective participants who, in the opinion of the investigator, may not be able to comply with all study procedures (including compliance issues related to feasibility/logistics)

Where it is running

• City of Hope Medical Center — Duarte, California, United States (enrolling)

Full record on ClinicalTrials.gov

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