Effect of Vaccination on Turnover of Lamivudine (3TC) Sensitive and Resistant Virus Populations in HIV-1-Infected Individuals

• Status: Withdrawn
• Trial end date: 1969-12-31
• Target enrollment: 0
• Participant gender: All

Summary

To ascertain whether the origin of plasma HIV-1-RNA following T cell activation represents the activation of latently infected cells or an increase in cells permissive for replacing viral mutants.

The mechanism by which immune stimulation increases circulating levels of HIV-1 is not known. In particular, it is uncertain whether the transient increase in plasma HIV-1 RNA is due to enhanced replication of an actively replicating pool of HIV-1, or is due instead to activation of proviral sequences in previously resting CD4+ cells. One approach to discriminate these alternatives is a "molecular pulse-chase" experiment. In this approach, drug resistant mutants would be selected by administration of Lamivudine (3TC).

• Phase: N/A
• Accepts Healthy Volunteers?: No

Details

• Lead Sponsor: National Institute of Allergy and Infectious Diseases (NIAID)
• Treatments: Heptavalent Pneumococcal Conjugate Vaccine; Lamivudine; Vaccines

Criteria

Inclusion Criteria

Concurrent Medication:

Allowed:

• Antiretroviral therapy, provided the patient has been on the same dose and drugs for 60 days prior to study entry.

Patients must have:

• Documented HIV infection.

• CD4 lymphocyte count of > 300 cells/mm3.

• One plasma HIV-1 RNA level between >= 20,000 and < 120,000 copies/ml.

Prior Medication:

Allowed:

• Stable antiretroviral therapy.

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms and conditions are excluded:

• Presence of an AIDS defining opportunistic infection, including Kaposi's sarcoma.

• Allergy to influenza or pneumococcal vaccine or their components; to egg or egg products.

• Unexplained temperature >= 38.5 degrees C for 7 consecutive days within the 30 days prior to study entry.

• Concurrent participation in other experimental therapies.

Concurrent Medication:

Excluded:

• Systemic chemotherapy.

• Steroids.

• Corticosteroids.

• Vaccinations.

• Any new antiretroviral agents that the patient was not taking at the time of study entry and not prescribed by the study.

• Colony stimulating factors including G-CSF or rEPO.

• Immune modulators/immune based therapies.

Concurrent Treatment:

Excluded:

• Radiation therapy.

• Transfusion dependent patients.

Patients with any of the following prior conditions are excluded:

• History of an AIDS defining opportunistic infection, including Kaposi's sarcoma (except limited cutaneous diseases [< 5 lesions]).

• History of acute or chronic pancreatitis.

Prior Medication:

Excluded:

• Prior treatment with 3TC.

Excluded within 30 days of study entry:

• Treatment with immune modulators.

• Acute or chronic therapy for recognized infections (eg, influenza, HSV, VZV).

Excluded within 1 year of study entry:

Treatment with an influenza and/or pneumonia vaccine

[AS PER AMENDMENT 1/23/97:

• influenza vaccine only].

[AS PER AMENDMENT 1/23/97:

• Excluded within 3 years of study entry:

• Pneumonia vaccine.]