R5 Integrase Study in HIV-1 Naive Patients

Seven antiretroviral naïve HIV infected participants will be treated with a combination of
raltegravir and maraviroc and followed for 48 weeks to determine the time to virologic
suppression of (HIV-1 viral load < 50 copies/ml).

Inclusion Criteria:

- HIV-1 infection

- CD4 count ≥ 350

- RNA > 5,000

- CCR5 tropic virus

- Baseline genotype without significant mutations known to confer antiretroviral drug
resistance to currently licensed antiretroviral agents

- Antiretroviral naïve (< 7 days of experience)

- 18-75 years of age

- Subject able to provide informed consent for the study

- Women of child-bearing age agree to remain abstinent or use (or have their partner
use) an acceptable method of birth control throughout the study. Acceptable method of
birth control is defined as intrauterine device (IUD), diaphragm with spermicide,
contraceptive sponge, condom, vasectomy.

Exclusion Criteria:

- Dual/mixed tropic virus,

- Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) >2.5 times the
upper limits of normal;

- Total bilirubin >1.5 mg/dL,

- Women pregnant or breastfeeding,

- History of malignancy

- Enrollment in an experimental protocol with concomitant use of drugs known to impact
or be impacted in terms of pk or drug-drug interactions with either raltegravir or
maraviroc. This includes inducers of UGT1A1 ( such as rifampin, phenytoin,
Phenobarbital rifabutin, St. John's wart) as well as CYP3A inhibitors (such as
ketoconazole, itraconazole, clarithromycin , nefazodone and telithromycin) and CYP3A
inducers (such as rifampin, carbamazepine, Phenobarbital and phenytoin)

- Enrollment in an experimental protocol having received investigational
agents(antiretroviral or non-antiretroviral) within 30 days of study enrollment

- Chronic active hepatitis B infection

- Subject has a history or current evidence of any condition, therapy, laboratory
abnormality or other circumstance that might confound the results of the study, or
interfere with the patient's participation for the full duration of the study, such
that it is not in the best interest of the patient to participate.

- Subject is unlikely to adhere to the study procedures, keep appointments, or is
planning to relocate during the study.

- Subject requires or is anticipated to require any of the prohibited medications noted
in the protocol