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| Sponsors and Collaborators: |
Protein Sciences Corporation National Institute of Allergy and Infectious Diseases (NIAID) |
|---|---|
| Information provided by: | National Institute of Allergy and Infectious Diseases (NIAID) |
| ClinicalTrials.gov Identifier: | NCT00000667 |
Purpose
To determine the safety of intradermal gp160 in HIV seropositive individuals who are asymptomatic and have a relatively intact immune system. To determine whether there is evidence of a delayed-type hypersensitivity (DTH) response (a "positive" skin test) in these patients, and also the dose of gp160 that elicits a delayed-type hypersensitivity (DTH) response. Early immunity to HIV may play an important role in the long interval between virus infection and the onset of clinical disease. Immune responses have been demonstrated in HIV-infected individuals within weeks to months of infection. Although none of these responses has been shown to be protective, it is possible that boosting anti-HIV immune responses through immunization may slow the progression of HIV infection. DTH responses to HIV-derived recombinant envelope glycoprotein could provide a means of measuring an important immune function in infected patients, and serve as an easily measured surrogate marker of cellular immunity. In addition to eliciting local, cutaneous DTH responses, intradermal inoculation of skin test antigens may be immunogenic, resulting in new antibody production and cellular immune responses. This study allows direct comparison of gp160 administered intradermally with alum-adjuvanted intramuscular preparation with respect to immunogenicity in HIV seropositive patients.
| Condition | Intervention | Phase |
|---|---|---|
|
HIV Infections |
Biological: gp160 Vaccine (MicroGeneSys) |
Phase I |
| Study Type: | Interventional |
| Study Design: | Prevention, Open Label |
| Official Title: | A Phase I/II Dose Escalation Study of Intradermal gp160 to Evaluate Safety, Delayed Type Hypersensitivity (Skin Test) Responses and Immunogenicity in Asymptomatic HIV Seropositive Patients With More Than 400 CD4+ Cells |
| Estimated Enrollment: | 20 |
Early immunity to HIV may play an important role in the long interval between virus infection and the onset of clinical disease. Immune responses have been demonstrated in HIV-infected individuals within weeks to months of infection. Although none of these responses has been shown to be protective, it is possible that boosting anti-HIV immune responses through immunization may slow the progression of HIV infection. DTH responses to HIV-derived recombinant envelope glycoprotein could provide a means of measuring an important immune function in infected patients, and serve as an easily measured surrogate marker of cellular immunity. In addition to eliciting local, cutaneous DTH responses, intradermal inoculation of skin test antigens may be immunogenic, resulting in new antibody production and cellular immune responses. This study allows direct comparison of gp160 administered intradermally with alum-adjuvanted intramuscular preparation with respect to immunogenicity in HIV seropositive patients.
Each of 10 volunteers is initially injected with the lowest dose of intradermal antigen and the injection site observed at 24, 48, and 72 hours. Clinical and laboratory evaluations are performed 4 and 8 weeks after inoculation. If there is not delayed-type hypersensitivity (DTH) response to the lowest dose, patients are retested at the next dose 8 weeks later and dose escalation is continued at 8-week intervals until (1) there is a DTH response to gp160; or (2) the maximum anticipated dose is reached. In any individual, a higher dosage is administered only if there is no evidence of DTH response. Patients with a DTH may continue to receive booster injections of gp160 at 3 month intervals up to week 70. Patients with an immune response but no DTH may continue to receive injections for an additional year. A second group of 10 asymptomatic individuals are recruited and inoculated with the dose found to bring about either a DTH or lymphocyte proliferative response in 7 of the 10 patients in the first group. If the second group confirms the results of the initial group, the study is amended to include patients with AIDS-related complex (ARC) and AIDS.
Eligibility| Ages Eligible for Study: | 18 Years and older |
| Genders Eligible for Study: | Both |
| Accepts Healthy Volunteers: | No |
Inclusion Criteria
Concurrent Medication:
Allowed:
Patients must have the following:
Exclusion Criteria
Co-existing Condition:
Patients with the following conditions or symptoms are excluded:
Concurrent Medication:
Excluded:
Patients with the following are excluded:
Prior Medication:
Excluded within 90 days of study entry:
Active substance abuse (either continuing daily alcohol abuse or intravenous drug use).
Contacts and Locations| United States, California | |
| Stanford Univ School of Medicine | |
| Stanford, California, United States, 94305 | |
| United States, New York | |
| Bellevue Hosp / New York Univ Med Ctr | |
| New York, New York, United States, 10016 | |
| Study Chair: | Katzenstein DA |
More Information
| Study ID Numbers: | ACTG 148 |
| Study First Received: | November 2, 1999 |
| Last Updated: | June 23, 2005 |
| ClinicalTrials.gov Identifier: | NCT00000667 |
| Health Authority: | Unspecified |
|
Vaccines, Synthetic Injections, Intradermal HIV Antigens HIV Seropositivity HIV-1 |
Drug Evaluation Hypersensitivity, Delayed AIDS Vaccines HIV Therapeutic Vaccine |
|
Virus Diseases Sexually Transmitted Diseases, Viral Hypersensitivity Hypersensitivity, Delayed HIV Seropositivity |
HIV Infections Sexually Transmitted Diseases Acquired Immunodeficiency Syndrome Retroviridae Infections Immunologic Deficiency Syndromes |
|
RNA Virus Infections Slow Virus Diseases Immune System Diseases Lentivirus Infections Infection |
