Clinical trial NCT00797381: Efficacy and Safety of MK-0518 in Treatment-Experienced HIV-1 Infected Adult Patients With Hemophilia
Official title: A Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety, Tolerability of MK-0518 in Treatment-Experienced HIV-1 Infected Adult Patients With Hemophilia
Study type: OBSERVATIONAL
Overall status: UNKNOWN
Conditions: HIV Infection
Hemophilia A
Keywords: MK-0518
HIV
AIDS
hemophilia
treatment experienced
Lead sponsor: Shanghai Public Health Clinical Center
Sponsor class: OTHER_GOV
Collaborators: name: Merck Sharp & Dohme LLC
First posted: 2008-11-25
Enrollment: 100
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_CONTROL
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: treatment-experienced HIV-1 infected adult patients with hemophilia

Brief summary: This is an randomized, double-blind, placebo-controlled study to assess the safety, tolerability and efficacy of MK-0518 compared to placebo when combined with other antiretroviral drugs, in treatment-experienced HIV-infected patients with hemophilia.

Subjects enrolled in the study sign the consent form, then are randomly assigned to MK-0518 400 mg twice daily plus optimized background therapy (OBT) group or placebo plus OBT group.Each group concludes at least 50 subjects. For each patient, detection of HIV viral load and CD4+ T lymphocyte count is done at screening, and at weeks 4, 8, 12 and 24. The safety profile of MK-0518 is monitored according to patients' complaints and the results of physical and laboratory examinations.

The safety and efficacy of MK-0518 400 mg b.i.d. compared to placebo, both in combination with OBT, will be assessed by review of the accumulated study data in HIV-infected patients with hemophilia.

Detailed description: 1. Objective

   To assess the safety, tolerability and efficacy of MK-0518 compared to placebo when combined with other antiretroviral drugs, in treatment-experienced HIV-infected patients with hemophilia.
2. Background and Significance

Current anti-HIV drugs are mainly reverse transcriptase inhibitors, which include nucleoside reverse transcriptase inhibitors(NRTIs) and non-nucleoside reverse transcriptase inhibitors(NNRTIs), and protease inhibitors(PIs). However, HIV can become rapidly resistant to them due to its high rate of mutation while replicating, which forces people to seek new targets for anti-HIV therapy continually. Integrase is an another enzyme essential for HIV reproduction. To inhibit integrase activity is an effective measure to suppress HIV replication. MK-0518(Raltegravir）was approved by the United States Food and Drug Administration(FDA) on October 12th 2007 due to its potent antiviral activity and became the first-to-market integrase inhibitor.Compared with other antiviral drugs, it has new action mechanism and target site, so there is no cross resistance between it and them, which makes it a good option for patients with multi-drug resistant HIV strains. HIV infection is very common in hemophiliac patients who need continuous infusion of clotting products,and the chance of getting HIV infection for hemophilia patients is very high, especially before 1985 when non-virus-inactivated factor concentrates were widely used. Many hemophilia patients were infected with HIV, and AIDS became their main cause of death.The recommended first-line antiretroviral regimen for HIV/AIDS patients with hemophilia concludes two NRTIs and one NNRTIs, while protease inhibitors are not recommended to use in these patients, because they are likely to worsen bleeding tendency. So, if HIV/AIDS patients with hemophilia are resistant to NRTIs and NNRTIs, there are few remaining options for them to choose as part of second-line drugs. However, MK-0518，a drug with novel anti-HIV mechanism different with NRTIs and NNRTIs, may be used in HIV/AIDS patients with hemophilia as the second-line drug.

3． Study design

1. Patients Enrollment
2. Patients enrolled in the study sign consent form
3. Select an optimized background therapy(OBT) for each subject
4. Randomization: patients are randomly assigned to MK-0518 400 mg twice daily plus OBT group or placebo plus OBT group, each group concludes at least 50 subjects.
5. Data collection: for each patient, detection of HIV viral load and CD4+ T lymphocyte count is done at screening, and at weeks4, 8, 12, 16, and 24. The safety profile of MK-0518 is monitored according to patients' complaints and the results of physical and laboratory examinations.
6. Endpoints of study: The primary endpoint is the the safety and tolerability of MK-0518 400 mg b.i.d. compared to placebo, both in combination with OBT.The secondary endpoint is antiretroviral activity of MK-0518 400 mg b.i.d. compared to placebo, both in combination with OBT.

Eligibility criteria: Inclusion Criteria:

* HIV-infected patients with hemophilia aged over 18 who have failed previous antiretroviral treatment are eligible.

Primary outcomes:
measure: The safety and tolerability of MK-0518 400 mg b.i.d. compared to placebo, both in combination with OBT, assessed by review of the accumulated safety data in HIV-infected patients with hemophilia.
timeFrame: 24 weeks
Secondary outcomes:
measure: Antiretroviral activity of MK-0518 400 mg b.i.d. compared to placebo, both in combination with OBT.
timeFrame: 24 weeks
Other outcomes:
Locations:
city: Shanghai
country: China
facility: Shanghai Public Health Clinical Center
state: Jinshan
Study officials:
affiliation: Shanghai Public Health Clinical Center
name: Hongzhou Lu, PhD
role: PRINCIPAL_INVESTIGATOR
References: