RecruitingInterventionalPhase 4

Phase IV Single-arm Pharmacokinetic Study of Skeletal Muscle Area-based Paclitaxel Infusion in Patients With Cancer

NCT ID: NCT05183126Sponsor: University of Michigan Rogel Cancer CenterLast updated: 2026-03-06

Summary

The primary objective of this pharmacokinetics study is to compare the maximum concentration level of paclitaxel in patients with low/sarcopenic skeletal muscle area (SMA), at the end of a 2-3 hour paclitaxel infusion, to the maximum level in patients with normal SMA at the end of a standard 1-hour infusion with the goal of determining whether lengthening the infusion in patients with low/sarcopenic SMA normalizes the levels to those of patients with normal SMA.

Detailed description

Paclitaxel is an FDA-approved and commonly used standard of care agent for patients with early-stage breast cancer. This study will use the standard dose of 80 mg/m\^2, including the typical pre-medications as per University of Michigan Rogel Cancer Center institutional standard. The only investigational component of this study is lengthening the infusion duration from 1-hour to 2 or 3 hours for a single dose in patients with low SMA. JAN2025 update, Paclitaxel is an FDA-approved and commonly used standard of care agent for patients with early-stage breast cancer or metastatic gastric or esophageal cancers.

Arms & interventions

DrugPaclitaxel
Weekly intravenous (IV) infusion of a standard dose of paclitaxel 80 mg/m\^2. Dose 1 is a 90-minute infusion. All other doses administered as a 1-hour infusion for a total of 12 weekly doses.
DrugPaclitaxel
Weekly intravenous (IV) infusion of a standard dose of paclitaxel 80 mg/m\^2. Dose 1 is a 90-minute infusion. During doses 2-12, patients with low SMA will receive one 2-hour infusion and patients with sarcopenic SMA will receive one 3-hour infusion. All other doses during weeks 2-12 are standard infusion time.

Outcome measures

Primary

Maximum concentration (Cmax) of paclitaxel plasma
Compare Cmax in patients with lower SMA with an adjusted infusion duration (i.e., 2-hour or 3-hour) to that of patients with normal SMA receiving standard 1-hour infusion. Blood samples for pharmacokinetic analysis will be collected within 5 minutes prior to the end of SMA-based and standard paclitaxel infusions. Measurement of plasma paclitaxel concentration for Cmax will be conducted using a liquid chromatography/mass spectroscopy assay.
Time frame: Up to week 12

Secondary

Two- to three-hour Cmax vs. one-hour Cmax in low SMA patients
Time frame: Up to week 12
One-hour Cmax in normal SMA patients vs. one-hour Cmax in low SMA patients
Time frame: Up to week 12

Eligibility criteria

Sex: FemaleAge: 18 Years and olderHealthy volunteers: No

Inclusion Criteria: * Planned paclitaxel 80 mg/m\^2, 1-hour infusion * Evaluable computed tomography (CT) scan, positron emission tomography computed tomography (PET-CT) scan, or MRI scan (e.g. scan of the chest, abdomen, or pelvis for any indication w/in 1 year) * Female * ≥ 18 years old * Adequate organ function to receive paclitaxel treatment as defined in the protocol * Ability to understand and the willingness to sign a written informed consent Exclusion Criteria: * Concomitant administration of any moderate or strong inducer or inhibitor of CYP2C8, including rifampin or clopidogrel. * History of hypersensitivity reaction to paclitaxel or any components of paclitaxel (e.g., Cremophor EL) that precludes continued treatment with standard dose and infusion length * Pregnant or nursing * Receiving any other dose (i.e., not 80 mg/m2) or infusion rate (i.e., not 60 minute infusion) either due to toxicity during a previous cycle or any other reason

Study locations (1)

University of Michigan Rogel Cancer Center

Ann Arbor, Michigan, 48109

Recruiting

Daniel L Hertz, PharmD, PhD · Principal Investigator