Paclitaxel Albumin-Stabilized Nanoparticle Formulation in Treating Patients of Different Ages With Metastatic Breast Cancer

May 18, 2026 updated by: City of Hope Medical Center

Age-Related Changes in Nanoparticle Albumin Bound (Nab) Paclitaxel Pharmacokinetics and Pharmacodynamics

RATIONALE: Gathering information from patients of different ages receiving paclitaxel albumin-stabilized nanoparticle formulation for metastatic breast cancer may help doctors understand how the age of the patient changes the way the drug works.

PURPOSE: This phase II trial is studying how well paclitaxel albumin-stabilized nanoparticle formulation works in treating patients of different ages with metastatic breast cancer.

Study Overview

Detailed Description

OBJECTIVES:

Primary

  • To determine age-related changes in the pharmacokinetics (pK) of weekly paclitaxel albumin-stabilized nanoparticle formulation (nab-paclitaxel) in patients with metastatic breast cancer.
  • To determine age-related changes in the pharmacodynamics (toxicity) of nab-paclitaxel in these patients.

Secondary

  • To determine response and time to progression in these patients.
  • To explore predictors of pK parameters in these patients.
  • To explore predictors of the need for dose reduction, dose delays, or grade 3 or 4 toxicity in these patients.

OUTLINE: Patients are stratified by age in years (< 50 vs 50-60 vs 60-70 vs > 70).

Patients receive paclitaxel albumin-stabilized nanoparticle formulation IV over 30 minutes once daily on days 1, 8, and 15 as planned. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.

Blood is drawn for pharmacokinetic studies periodically during course 1.

Patients complete questionnaires regarding risk factors that would predict for pharmacokinetic parameters at baseline, prior to the third course of treatment, and at end of study. Data collected include medical characteristics, demographics, functional status, comorbidity, psychological status, social functioning and support, nutritional status, and cognition.

Study Type

Interventional

Enrollment (Actual)

40

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • California
      • Duarte, California, United States, 91010-3000
        • City of Hope Medical Center
      • Pasadena, California, United States, 91105
        • City of Hope Medical Group

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 120 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

DISEASE CHARACTERISTICS:

Inclusion criteria:

  • Diagnosis of metastatic breast cancer
  • Any estrogen receptor, progesterone receptor, or HER-2/neu status allowed as long as the patient will receive paclitaxel albumin-stabilized nanoparticle formulation alone
  • First- or second-line chemotherapy treatment for metastatic disease planned

Exclusion criteria:

  • Untreated CNS metastases or symptomatic CNS metastases requiring escalating doses of corticosteroids

PATIENT CHARACTERISTICS:

  • Karnofsky performance status 70-100%
  • WBC ≥ 3,000/mm³
  • ANC ≥ 1,500/mm³
  • Platelet count ≥ 100,000/mm³
  • Hemoglobin ≥ 9.0 g/dL
  • AST and ALT ≤ 2.5 times upper limit of normal (ULN)
  • Alkaline phosphatase ≤ 2.5 times ULN (unless bone metastases are present in the absence of liver metastases)
  • Bilirubin ≤ 1.5 mg/dL
  • Peripheral neuropathy ≤ grade 1
  • Creatinine clearance ≥ 30 mL/min (calculated or 24-hour)
  • Negative pregnancy test
  • Fertile patients must use effective contraception
  • Not pregnant or nursing
  • No known history of allergic reactions to paclitaxel
  • No serious or uncontrolled infection
  • Ability to understand and the willingness to sign a written informed consent document

PRIOR CONCURRENT THERAPY:

  • See Disease Characteristics
  • No ≥ grade 2 toxicity from prior therapy (other than alopecia)
  • No taxane for adjuvant therapy or metastatic disease within the past 12 months
  • No other concurrent investigational agents
  • No other concurrent anticancer therapy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: nab-paclitaxel
100 mg/m2 3 weeks on 1 week off
Cycle 1, week 1 at 0, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 24 and 48 hours
Prior to treatment, at the end of 2 cycles of therapy and upon completion of therapy
Prior to treatment, at the end of 2 cycles of therapy and upon completion of therapy
Prior to treatment, at the end of 2 cycles of therapy and upon completion of therapy
Prior to treatment, at the end of 2 cycles of therapy and upon completion of therapy
Prior to treatment, at the end of 2 cycles of therapy and upon completion of therapy

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Mean Area Under the Curve Over 24 Hours (AUC24)
Time Frame: Cycle 1, week 1 at 0, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 24 hours post treatment

Mean of area under the curve over 24 hours (AUC24) reported as well as linear regression of AUC24 by age and chemotherapy toxicity risk score.

Chemotherapy toxicity risk score is based on the following variables and the value assigned to them. Higher scores indicate more risk, range of 2-19:

patient age (>=72 years); creatinine clearance (<34 mL/min); presence of amenia (<10 g/dL); hearing impairment; falls in the last 6 months; need for assistance with taking medications; limitations in walking one block; decreased social activities; chemotherapy dosing; number of chemotherapy drugs; cancer type

Cycle 1, week 1 at 0, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 24 hours post treatment
Mean Clearance (CL)
Time Frame: Cycle 1, week 1 at 0, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 24 hours post treatment

Mean CL reported as well as regression results of CL by age and chemotherapy toxicity risk score.

Chemotherapy toxicity risk score is based on the following variables and the value assigned to them. Higher scores indicate more risk, range of 2-19:

patient age (>=72 years); creatinine clearance (<34 mL/min); presence of amenia (<10 g/dL); hearing impairment; falls in the last 6 months; need for assistance with taking medications; limitations in walking one block; decreased social activities; chemotherapy dosing; number of chemotherapy drugs; cancer type

Cycle 1, week 1 at 0, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8, 24 hours post treatment

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Grade 3 Toxicity Rate by Chemotherapy Toxicity Risk Score
Time Frame: Up to 2.5 years

Comparison of presence of grade 3 toxicity rate by risk score distribution.

Chemotherapy toxicity risk score is based on the following variables. Higher scores indicate more risk, range of 2-19:

patient age (>=72 years); creatinine clearance (<34 mL/min); presence of amenia (<10 g/dL); hearing impairment; falls in the last 6 months; need for assistance with taking medications; limitations in walking one block; decreased social activities; chemotherapy dosing; number of chemotherapy drugs; cancer type

Chemotherapy toxicity risk score category:

Low risk score - toxicity risk score: 0-5 Medium risk score - toxicity risk score: 6-9 High risk score - toxicity risk score: 10-19

Up to 2.5 years
Best Response
Time Frame: Assessed after every 2 cycles of therapy until progression, up to 2.5 years

Complete Response (CR): Disappearance of all target lesions. Partial Response (PR): At least a 30% decrease in the sum of the longest diameter (LD) of target lesions, taking as reference the baseline sum LD.

Progressive Disease (PD): At least a 20% increase in the sum of the LD of target lesions, taking as reference the smallest sum LD recorded since the treatment started or the appearance of one or more new lesions.

Stable Disease (SD): Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum LD since the treatment started.

Assessed after every 2 cycles of therapy until progression, up to 2.5 years
Median Event-free Survival (EFS) in Months
Time Frame: From the date treatment begins until the first date on which recurrence, progression or death due to any cause, assessed up to 3.5 years

Median and associated 95% exact Clopper and Pearson binomial confidence limits will be estimated for EFS. EFS will be estimated using the product limit method of Kaplan and Meier.

EFS is defined by time to disease recurrence, disease progression or death to due to any cause

From the date treatment begins until the first date on which recurrence, progression or death due to any cause, assessed up to 3.5 years
Number of Participants Requiring Dose Reductions
Time Frame: At the completion of treatment, up to 2.5 years
Number of participants requiring a dose reduction is reported and analysis was performed using a student's 2 sample t test to determine the need of dose reductions based on age, AUC, and CL.
At the completion of treatment, up to 2.5 years
Number of Participants With a Dose Omission
Time Frame: At the completion of treatment, up to 2.5 years
Number of participants with a dose omission is reported and analysis was performed using a student's 2 sample t test to determine the need of dose omission based on age, AUC, and CL.
At the completion of treatment, up to 2.5 years
Percent of Participants With a Grade 3 Toxicity
Time Frame: At the completion of treatment, up to 2.5 years
Percent of participants experiencing a grade 3 toxicity is reported and analysis was performed using a student's 2 sample t test to determine the presence of grade 3 toxicity based on age, AUC, and CL.
At the completion of treatment, up to 2.5 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Mina Sedrak, MD, City of Hope Medical Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

February 11, 2008

Primary Completion (Actual)

October 25, 2011

Study Completion (Estimated)

March 23, 2027

Study Registration Dates

First Submitted

February 6, 2008

First Submitted That Met QC Criteria

February 6, 2008

First Posted (Estimated)

February 7, 2008

Study Record Updates

Last Update Posted (Actual)

June 4, 2026

Last Update Submitted That Met QC Criteria

May 18, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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