Drug Interaction Study of Darunavir/Ritonavir and Lopinavir/Ritonavir on GSK2248761 PK and CYP450 Probe Drugs

Sponsor

GlaxoSmithKline (Industry)

Overall Status

Completed

CT.gov ID

NCT00920088

Collaborator

(none)

Enrollment

Location

Arms

Duration (Months)

4.8

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The purpose of this study is to evaluate the effect of GSK2448761 on CYP450 metabolic probes and to evaluate the 2-way interaction between GSK2448761 and two ritonavir-boosted protease inhibitors that are commonly used in HIV-infected subjects.

Condition or Disease	Intervention/Treatment	Phase
Healthy Subjects Infection, Human Immunodeficiency Virus	Drug: darunavir/ritonavir Drug: lopinavir/ritonavir Drug: Midazolam Drug: Dextromethorphan Drug: Flurbiprofen Drug: GSK2248761	Phase 1

Study Design

Study Type:

Interventional

Actual Enrollment :

24 participants

Allocation:

Non-Randomized

Intervention Model:

Parallel Assignment

Masking:

None (Open Label)

Primary Purpose:

Basic Science

Official Title:

A Phase I Study to Evaluate the Effect of Darunavir/Ritonavir and Lopinavir/Ritonavir on GSK2248761 Pharmacokinetics and to Assess the Effect of GSK2248761 on CYP450 Probe Drugs in Healthy Adult Subjects

Study Start Date :

Jun 1, 2009

Actual Primary Completion Date :

Nov 1, 2009

Actual Study Completion Date :

Nov 1, 2009

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Cohort 1 GSK2248761 with LPV/RTV arm and probes	Drug: lopinavir/ritonavir LPV/RTV 400/100mg Drug: Midazolam Midazolam 3mg Drug: Dextromethorphan Dextromethorphan 30mg Drug: Flurbiprofen Flurbiprofen 50mg Drug: GSK2248761 NNRTI under investigation
Experimental: Cohort 2 GSK2248761 with DRV/RTV	Drug: darunavir/ritonavir DRV/RTV 600/100mg Drug: GSK2248761 NNRTI under investigation

Arm

Intervention/Treatment

Experimental: Cohort 1

GSK2248761 with LPV/RTV arm and probes

Drug: lopinavir/ritonavir

LPV/RTV 400/100mg

Drug: Midazolam

Midazolam 3mg

Drug: Dextromethorphan

Dextromethorphan 30mg

Drug: Flurbiprofen

Flurbiprofen 50mg

Drug: GSK2248761

NNRTI under investigation

Experimental: Cohort 2

GSK2248761 with DRV/RTV

Drug: darunavir/ritonavir

DRV/RTV 600/100mg

Drug: GSK2248761

NNRTI under investigation

Outcome Measures

Primary Outcome Measures

PK parameters [35 days]

Secondary Outcome Measures

12-lead ECGs [35 days]
clinical laboratory assessments [35 days]
vital signs [35 days]
pharmacokinetic parameters [35 days]

Eligibility Criteria

Criteria

Ages Eligible for Study:

18 Years to 50 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

Healthy as determined by a responsible and experienced physician, based on a medical evaluation including medical history, physical examination, laboratory tests and cardiac monitoring.
Male or female between 18 and 50 years of age inclusive, at the time of signing the informed consent.
A female subject is eligible to participate if she is of non-childbearing potential (i.e., physiologically incapable of becoming pregnant).
Male subjects must agree to use one of the contraception methods listed in the protocol. This criterion must be followed from the time of the first dose of study medication until the follow-up visit.
Body weight >=50 kg for men and >=45 kg for women and body mass index (BMI) within the range 18.5-31.0 kg/m2 (inclusive).
Capable of giving written informed consent, which includes compliance with the requirements and restrictions listed in the consent form.

Exclusion Criteria:

As a result of the medical interview, physical examination, or screening investigations, the Investigator considers the subject unfit for the study.
The subject has a positive pre-study drug/alcohol screen.
Unwilling to refrain from the use of illicit drugs and adhere to other protocol-stated restrictions while participating in the study.
History of regular alcohol consumption within 6 months of the study.
Unwilling to abstain from alcohol for 48 hours prior to the start of dosing until collection of the final pharmacokinetic sample during each treatment period.
History or regular use of tobacco- or nicotine-containing products within 3 months prior to screening.
History/evidence of symptomatic arrhythmia, angina/ischemia, coronary artery bypass grafting (CABG) surgery or percutaneous transluminal coronary angioplasty (PCTA) or any clinically significant cardiac disease.
History/evidence of clinically significant pulmonary disease.
Current or chronic history of liver disease, or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones).
Subjects with a pre-existing condition interfering with normal gastrointestinal anatomy or motility, hepatic and/or renal function, that could interfere with the absorption, metabolism, and/or excretion of the study drugs. Subjects with a history of cholecystectomy should be excluded.
The subject has participated in a clinical trial and has received an investigational product within the following time period prior to the first dosing day in the current study: 30 days, 5 half-lives or twice the duration of the biological effect of the investigational product (whichever is longer).
The subject has received GSK2248761 in a previous clinical trial.
Use of prescription or non-prescription drugs, including vitamins, herbal and dietary supplements (including St John's Wort) within 7 days (or 14 days if the drug is a potential enzyme inducer) or 5 half-lives (whichever is longer) prior to the first dose of study medication, unless in the opinion of the Investigator and GSK Medical Monitor the medication will not interfere with the study procedures or compromise subject safety.
History of sensitivity to any of the study medications, or components thereof or a history of drug or other allergy that, in the opinion of the investigator or GSK Medical Monitor, contraindicates their participation.
Where participation in the study would result in donation of blood or blood products in excess of 500 mL within a 56 day period.
Has a known intolerance or hypersensitivity to aspirin, NSAIDS, or benzodiazepines, or a known intolerance to the active and/or inactive ingredients in dextromethorphan, midazolam and flurbiprofen (Cohort 1 only)
Has any condition or symptom contraindicated for administration of the study drugs: dextromethorphan, midazolam and flurbiprofen. The Investigator should reference the product information of each study drug. (Cohort 1 only)
History of sensitivity to heparin or heparin-induced thrombocytopenia (if heparin is used to maintain the patency of an intravenous cannula).
A positive pre-study Hepatitis B surface antigen or positive Hepatitis C antibody result within 3 months of screening.
A positive test for HIV antibody.
AST, ALT, alkaline phosphatase and bilirubin >=1.5xULN (isolated bilirubin >1.5xULN is acceptable if bilirubin is fractionated and direct bilirubin <35%).
Pregnant females as determined by positive serum hCG test at screening or prior to dosing.
Lactating females.
The subject's systolic blood pressure is outside the range of 90-140mmHg, or diastolic blood pressure is outside the range of 45-90mmHg or heart rate is outside the range of 50-100bpm for female subjects or 45-100 bpm for male subjects at Screening and Day -1.
Cardiac conduction abnormalities denoted on a single 12-lead ECG at screening or Day -1