- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01401010
Pharmacokinetic/Pharmacodynamic Study of Doripenem in Febrile Neutropenic Patients
Pharmacokinetic/Pharmacodynamic Study of Doripenem in Febrile Neutropenic Patients With Possible Bacterial Infection
Primary: To determine the serum pharmacokinetics (PK) of doripenem in febrile neutropenic patients.
Secondary: Monte Carlo Simulations Tested Against Various Gram-negative Isolates and Reported as Probability of Target Attainment (40% Time (fT)> minimum inhibitory concentration (MIC))
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Background: Doripenem is a group 2 carbapenem with enhanced in vitro activity against Gram-negative bacteria including Pseudomonas aeruginosa. Currently, there is a paucity of pharmacokinetic/pharmacodynamic data on doripenem in patients with febrile neutropenia.
Objectives: To conduct a pharmacokinetic and safety evaluation of two doses of doripenem in febrile neutropenic patients and provide probability estimates of attaining effective drug exposure against common Gram-negative pathogens.
Methods: We obtained multiple blood samples from 12 adult patients with febrile neutropenia who were receiving either 500 mg or 1000 mg of doripenem IV over 4-hours every 8 hours. Following at least 2 doses, serum concentrations were measured in each subject at 1, 4, 6 and 8 hours after initiation of a dose by a validated HPLC assay. The derived pharmacokinetic (PK) parameters from these serum levels were utilized to perform a 5000 patient Monte Carlo simulation against bacteria with minimal inhibitory concentrations (MICs) of 0.008 to 64 mg/L to determine probability estimates of time of free drug concentration > MIC (fT>MIC).
Results: The mean PK parameters in these patients were a volume of distribution (Vd) of 43.9L, an elimination rate constant (k) of 0.37 hr -1, a total clearance (Cl) of 14.4 L/h, and an area under the concentration-time curve (AUC) of 57.6 mg∙h/L. An optimal probability of target attainment (40% fT>MIC) of 90% was obtained against bacteria with MICs ≤ 2.0 and ≤ 4.0 mg/L with 500 mg and 1000 mg doses, respectively. Adverse events associated with doripenem were not observed in these patients.
Conclusions: The findings from this analysis of doripenem suggest that higher doses as well as prolonged infusions may be necessary to optimally treat selected Gram-negative bacteria (eg. Pseudomonas aeruginosa) in patients with febrile neutropenia
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
-
-
Michigan
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Lansing, Michigan, United States, 48910
- Sparrow Hospital
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- adult neutropenic (< 500 cells) patients who are febrile
Exclusion Criteria:
- Patients with Creatinine Clearance < 30 ml/min or allergy to carbapenems will be excluded.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Doripenem 500 mg
pharmacokinetics/pharmacodynamics
|
500 mg every 8 hours
Other Names:
|
Active Comparator: Doripenem 1000 mg
pharmacokinetics/pharmacodynamics
|
1000 mg every 8 hours
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mean (SD) Doripenem Pharmacokinetic Volume of Distribution Parameter in Febrile Neutropenic Patients
Time Frame: 1, 4, 6, 8 hours after at least two doses of drug
|
To determine the serum pharmacokinetic volume of distribution of doripenem in febrile neutropenic patients with pneumonia.
We obtained blood at 1, 4, 6, 8 hours after at least two doses of doripenem and measured these levels (mg/L)by HPLC assay.
|
1, 4, 6, 8 hours after at least two doses of drug
|
Mean (SD) Doripenem Pharmacokinetic (PK) Elimination Rate Constant Parameter in Febrile Neutropenic Patients
Time Frame: 1, 4, 6, 8 hours after at least two doses of drug
|
To determine the serum pharmacokinetic elimination rate constant of doripenem in febrile neutropenic patients with pneumonia.
We obtained blood at 1, 4, 6, 8 hours after at least two doses of doripenem and measured these levels (mg/L)by HPLC assay.
|
1, 4, 6, 8 hours after at least two doses of drug
|
Mean (SD) Doripenem Pharmacokinetic (PK) Half Life Parameter in Febrile Neutropenic Patients
Time Frame: 1, 4, 6, 8 hours after at least two doses of drug
|
To determine the serum pharmacokinetic half life of doripenem in febrile neutropenic patients with pneumonia.
We obtained blood at 1, 4, 6, 8 hours after at least two doses of doripenem and measured these levels (mg/L)by HPLC assay.
|
1, 4, 6, 8 hours after at least two doses of drug
|
Mean (SD) Doripenem Pharmacokinetic (PK) Clearance of Drug Parameter in Febrile Neutropenic Patients
Time Frame: 1, 4, 6, 8 hours after at least two doses of drug
|
To determine the serum pharmacokinetic clearance of drug of doripenem in febrile neutropenic patients with pneumonia.
We obtained blood at 1, 4, 6, 8 hours after at least two doses of doripenem and measured these levels (mg/L)by HPLC assay.
|
1, 4, 6, 8 hours after at least two doses of drug
|
Mean (SD) Doripenem Pharmacokinetic (PK) Area Under Serum Curve (mg*h/L) Parameter in Febrile Neutropenic Patients
Time Frame: 1, 4, 6, 8 hours after at least two doses of drug
|
To determine the serum pharmacokinetic area under serum curve of doripenem in febrile neutropenic patients with pneumonia.
We obtained blood at 1, 4, 6, 8 hours after at least two doses of doripenem and measured these levels (mg/L)by HPLC assay.
|
1, 4, 6, 8 hours after at least two doses of drug
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Monte Carlo Simulations Tested Against Various Gram-negative Isolates and Reported as Probability of Target Attainment (40% Time (fT) > Minimum Inhibitory Concentrations (MIC))
Time Frame: 1, 4, 6, 8 hours after an infusion of doripenem to determine the PK parameters
|
Following determination of pharmacokinetic (PK) parameters from patients with febrile neutropenia, Monte Carlo simulations were then conducted to determine time of serum concentrations above the MIC (40% of the time) against Gram-negative isolates. These Gram-negative isolates had a range of minimum inhibitory concentrations (MIC) to Doripenem. |
1, 4, 6, 8 hours after an infusion of doripenem to determine the PK parameters
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Gary Stein, PharmD, Michigan State University
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- DORIBAC4006a
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