Safety of and Immune Response to a Prime-Boost Vaccine Regimen in HIV-Uninfected Vaccine-Naive Adults

HIV Infections Clinical Trial

Official title:

A Phase 2a Clinical Trial to Evaluate the Safety and Immunogenicity of a Prime-boost Vaccine Regimen of pGA2/JS7 DNA and MVA/HIV62, in Healthy, HIV Uninfected Vaccinia-naive Adult Participants

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00820846
• Other study ID #: HVTN 205
• Secondary ID: 10658
• Status: Completed
• Phase: Phase 2
• Start date: January 2009
• Est. completion date: September 2014

Study information

• Verified date: August 2022
• Source: National Institute of Allergy and Infectious Diseases (NIAID)
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to evaluate the safety of and immune response to a two-vaccine regimen in healthy, HIV-uninfected adults who have never received an HIV preventive vaccine before.

Description:

Some of the first HIV vaccines were designed to trigger neutralizing antibody responses as a way to prevent HIV infection. Unfortunately, the first versions of these vaccines were not able to achieve their desired response. An alternative strategy to the antibody approach is the stimulation of HIV-specific CD8 T-lymphocyte (CTL) responses. CTL responses were previously demonstrated to play an important role in the control of simian immunodeficiency virus (SIV), the HIV equivalent seen in rhesus macaque monkeys. Additionally, other studies suggest CTLs play an important role in viral control during chronic infection. Based on this information, several groups have shifted their focus to the development of CTL-based vaccines, some of which have entered advanced clinical trials.

A DNA/rMVA vaccine strategy is structured to bring about both T-cell and antibody responses. The primary vaccination is DNA based and will express only HIV proteins as a way to produce an HIV-focused immune response. An rMVA vaccine strategy expresses both HIV and MVA proteins and may amplify the focused response of a DNA vaccination. Participants in this study will receive either a combined DNA/rMVA vaccine strategy, in which they receive both types of vaccines; an rMVA vaccine strategy, in which they receive only the rMVA vaccine; or a placebo. The DNA and rMVA are physically two different vaccinations given at separate times, but in the DNA/rMVA group, they will be used together to make up one preventive regimen. Both vaccine components express noninfectious virus-like particles.

This study is a multicenter, randomized study that is conducted in two parts and comprised of five groups. In all groups, participants will receive four injections. In Part A, Groups 1 and 2 will be compared. In Group 1, participants will receive two shots of the DNA vaccine and two shots of the rMVA vaccine. In Group 2, participants will receive four placebo injections. In Part B, Groups 3, 4, and 5 will be compared. In Group 3, the combination vaccine strategy will be used again; in Group 4, a single-vaccine strategy of three injections of the rMVA vaccine and one injection of placebo will be given; and in Group 5, participants will again receive four placebo injections. The study will last for a total of 12 months for participants, including enrollment and follow-up.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 299
• Est. completion date: September 2014
• Est. primary completion date: August 2012
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 50 Years

Eligibility

Inclusion Criteria:

• Access to a participating HIV Vaccine Trials Network (HVTN) clinical research center and willing to be followed for the planned duration of the study

• Ability and willingness to provide informed consent

• Assessment of understanding: completion of a questionnaire prior to first vaccination; demonstration of understanding for all questionnaire items answered incorrectly

• Willingness to receive HIV test results

• Good general health as shown by medical history, physical exam, and screening laboratory tests

• Certain specified laboratory values. More information on this criterion can be found in the study protocol.

• If pregnancy is possible, must agree to use contraception from at least 21 days prior to enrollment through the last protocol visit for sexual activity that could lead to pregnancy. More information on this criterion can be found in the study protocol.

• Willingness to discuss HIV infection risks, amenable to HIV risk reduction counseling, committed to maintaining behavior consistent with low risk of HIV exposure through the last required protocol clinic visit, and willing to continue annual follow-up contact after the last required protocol clinic visit for a total of 5 years following enrollment

• Assessed by clinic staff as being at "low risk" of HIV infection on the basis of sexual behaviors within the 12 months prior to enrollment. More information on this criterion can be found in the study protocol.

Exclusion Criteria:

• HIV vaccine(s) or other experimental vaccines, received in a prior HIV vaccine trial. More information on this criterion can be found in the study protocol.

• Receipt of smallpox vaccination

• Excessive alcohol use, frequent binge drinking, chronic marijuana abuse, or use of any other illicit drugs, such as cocaine or methamphetamine, within the past 12 months

• History of newly acquired or newly diagnosed syphilis; history of newly acquired gonorrhea, nongonococcal urethritis, herpes simplex virus type 2 (HSV2), chlamydia, pelvic inflammatory disease (PID), trichomonas, mucopurulent cervicitis,epididymitis, proctitis, lymphogranuloma venereum, chancroid, or hepatitis B within the past 12 months

• Immunosuppressive medication received within 168 days before first vaccination. Certain medications are excluded from this criterion; more information can be found in the study protocol.

• Blood products received within 120 days before first vaccination

• Immunoglobulin received within 60 days before first vaccination

• Live attenuated vaccines other than influenza vaccine received within 30 days before first vaccination or scheduled within 14 days after injection

• Influenza vaccine or any vaccines that are not live attenuated and were received within 14 days prior to first vaccination or that are scheduled within 14 days after injection

• Allergy treatment with antigen injections within 30 days before first vaccination or scheduled within 14 days after injection

• Intent to participate in another study of an investigational research agent during the planned duration of this study

• Current anti-tuberculosis (TB) prophylaxis or therapy

• Clinically significant medical condition. More information on this criterion can be found in the study protocol.

• Any medical, psychiatric, or social condition or occupational or other responsibility that in the opinion of the investigator might interfere with the study protocol

• Serious adverse reactions to vaccines. More information on this criterion can be found in the study protocol.

• Allergy to eggs and/or egg products

• History of or known active cardiac disease. More information on this criterion can be found in the study protocol.

• Participants who have two or more of the following cardiac risk factors: (1) participant report of history of elevated blood cholesterol defined as fasting low-density lipoprotein (LDL) greater than 160 mg/dL; (2) first degree relative (e.g., mother, father, sister, or brother) who had coronary artery disease before the age of 50 years; (3) current smoker; or (4) body mass index greater than or equal to 35.

• Electrocardiogram (ECG) with clinically significant findings. More information on this criterion can be found in the study protocol.

• Autoimmune disease

• Immunodeficiency

• Asthma other than mild, well-controlled asthma. More information on this criterion can be found in the study protocol.

• Diabetes mellitus, type 1 or type 2, including cases controlled with diet alone. Those with a history of isolated gestational diabetes are not excluded.

• Thyroidectomy or thyroid disease requiring medication during the last 12 months

• Angioedema within the last 3 years if episodes are considered serious or have required medication within the last 2 years

• Hypertension. More information on this criterion can be found in the study protocol.

• Body mass index greater than or equal to 40

• Bleeding disorder diagnosed by a doctor

• Malignancy. Participants with surgical excisions and subsequent observation periods, that in the investigator's estimation have a reasonable assurance of sustained cure or are unlikely to recur during the period of study, are not excluded.

• Seizure disorder, unless the participant has not required medication or had a seizure within the last 3 years.

• Asplenia

• Pregnant or breastfeeding

Related Conditions & MeSH terms

• HIV Infections

Intervention

Biological:
• pGA2/JS7 DNA vaccine
1 mL of pGA2/JS7 DNA vaccine
• Placebo
1 mL of sodium chloride for injection
• MVA/HIV62 vaccine
1 mL of recombinant modified vaccinia Ankara/HIV clade B gag-pol-env (MVA/HIV62)

Locations

Country	Name	City	State
Peru	ACSA CRS	Iquitos	Maynas
Peru	Barranco CRS	Lima
United States	Alabama CRS	Birmingham	Alabama
United States	Brigham and Women's Hospital Vaccine CRS (BWH VCRS)	Boston	Massachusetts
United States	Fenway Health (FH) CRS	Boston	Massachusetts
United States	The Hope Clinic of the Emory Vaccine Center CRS	Decatur	Georgia
United States	Vanderbilt Vaccine (VV) CRS	Nashville	Tennessee
United States	Columbia P&S CRS	New York	New York
United States	New York Blood Center CRS	New York	New York
United States	University of Rochester Vaccines to Prevent HIV Infection CRS	Rochester	New York
United States	Bridge HIV CRS	San Francisco	California
United States	Seattle Vaccine and Prevention CRS	Seattle	Washington

Sponsors (1)

Lead Sponsor	Collaborator
National Institute of Allergy and Infectious Diseases (NIAID)

Countries where clinical trial is conducted

United States,  Peru, 

References & Publications (3)

Goepfert PA, Elizaga ML, Seaton K, Tomaras GD, Montefiori DC, Sato A, Hural J, DeRosa SC, Kalams SA, McElrath MJ, Keefer MC, Baden LR, Lama JR, Sanchez J, Mulligan MJ, Buchbinder SP, Hammer SM, Koblin BA, Pensiero M, Butler C, Moss B, Robinson HL; HVTN 205 Study Group; National Institutes of Allergy and Infectious Diseases HIV Vaccines Trials Network. Specificity and 6-month durability of immune responses induced by DNA and recombinant modified vaccinia Ankara vaccines expressing HIV-1 virus-like particles. J Infect Dis. 2014 Jul 1;210(1):99-110. doi: 10.1093/infdis/jiu003. Epub 2014 Jan 7. — View Citation

Miedema F. A brief history of HIV vaccine research: stepping back to the drawing board? AIDS. 2008 Sep 12;22(14):1699-703. doi: 10.1097/QAD.0b013e3283021a61. Review. — View Citation

Rerks-Ngarm S, Brown AE, Khamboonruang C, Thongcharoen P, Kunasol P. HIV/AIDS preventive vaccine 'prime-boost' phase III trial: foundations and initial lessons learned from Thailand. AIDS. 2006 Jul 13;20(11):1471-9. Review. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Frequency of severe local and systemic reactogenicity signs and symptoms		Throughout study
Primary	Frequency of adverse events and assessed relationship to study products		Throughout study
Primary	Laboratory measures of safety, including boxplots of white blood cells (WBC), neutrophils, lymphocytes, hemoglobin, platelets, alanine aminotransferase (ALT), creatinine, and cardiac troponin results at baseline and following vaccination		At study entry and following vaccinations
Primary	Number of participants with early discontinuation of vaccinations, by treatment group and reason for discontinuation		Throughout study
Secondary	Responses to individual HIV potential T-cell epitope (PTE) peptide pools representing Env, Gag, and Pol		Throughout study
Secondary	Percentage of responding CD4+ and CD8+ T cells producing interferon (IFN)-gamma, interleukin (IL)-2, tumor necrosis factor (TNF)-alpha, CD57, perforin, or granzyme B or demonstrating other functions		Measured at study completion
Secondary	Frequency and titer of humoral responses detected by HIV binding antibody assays to p55 Gag and gp140 Env		Measured at study completion
Secondary	Frequency of vaccine-induced positive results with end of study HIV serological testing by commercial assays		Measured at study completion
Secondary	Frequency of CD4+ T-cell responses		Measured 2 weeks following last MVA vaccination
Secondary	Frequency of CD8+ T-cell responses		Measured 2 weeks following last MVA vaccination