Title

Safety and Immunogenicity of AERAS-402 in HIV-infected, Bacillus Calmette-Guerin (BCG)-Vaccinated Adults
Phase II Double-Blind, Randomized, Placebo-Controlled Study to Evaluate the Safety and Immunogenicity of AERAS-402 in HIV-infected, BCG-vaccinated Adults With CD4+ Lymphocyte Counts Greater Than 350 Cells/mm3
  • Phase

    Phase 2
  • Study Type

    Interventional
  • Intervention/Treatment

    aeras-402 ...
  • Study Participants

    26
This was a Phase II, randomized, double-blind, placebo-controlled trial conducted at 1 site in South Africa. A total of 26 subjects were randomized 1:1 to receive 2 doses of either AERAS-402 at 3 x 10^10 vp (N=13) or placebo (N=13) on Study Days 0 and 28. Dose-escalation to a second group of 40 subjects was planned, but although no safety concerns were identified, the sponsor decided not to continue the study.
Further study details as provided by Aeras.
Study Started
Dec 31
2009
Primary Completion
Mar 31
2012
Study Completion
May 31
2012
Results Posted
Oct 13
2014
Estimate
Last Update
Sep 09
2016
Estimate

Biological AERAS-402

AERAS-402 is a replication-deficient serotype 35 adenovirus containing DNA that expresses a fusion protein of three Mycobacterium tuberculosis (Mtb) antigens: 85A, 85B and TB10.4.

Biological Placebo

Placebo was the identical buffer solution in which AERAS-402 is formulated.

Placebo Placebo Comparator

Thirteen subjects received placebo vaccine that did not contain any AERAS-402.

Investigational Vaccine Experimental

Thirteen subjects received active vaccine 3 x 10^10 vp AERAS-402.

Criteria

Inclusion Criteria:

Age 21 years through 45 years (i.e., subject had not yet reached his/her 46th birthday at day of randomization).
Had completed the written informed consent process prior to undergoing any screening evaluations.
Had BCG vaccination at least 5 years previously, documented by medical history or presence of scar.
Females: Ability to avoid pregnancy for at least 6 months after receiving the last study vaccination: Women physically capable of pregnancy (not sterilized and still menstruating or within 1 year of the last menses if menopausal) must have avoided pregnancy from 28 days prior to administration of the study vaccine and must have agreed to avoid pregnancy through at least 6 months after receiving the last study vaccination. Acceptable methods of avoiding pregnancy included a sterile sexual partner, sexual abstinence (not engaging in sexual intercourse), or use of a combination of at least two forms of acceptable contraception: hormonal contraceptives (oral, injection, transdermal patch, or implant), vaginal ring, intrauterine device (IUD), and the use of a condom or a diaphragm; or the use of a condom or a diaphragm combined with spermicide.
Was able to carry out activities of daily living independently.
Had Body Mass Index (BMI) of at least 19 (wt./ht.2) by nomogram.
Had ability to complete follow-up period as required by the protocol.
Was able and willing to commit to avoiding elective surgery for at least 6 months after receiving the last study vaccination.
Was able and willing to stay in contact with the study site for the duration of the study.
Had committed to simultaneous enrollment in Aeras Vaccine Development Registry Protocol.
Had laboratory evidence of human immunodeficiency virus (HIV) infection, defined as a positive HIV-1 ELISA test plus a positive confirmatory test (e.g., a second HIV-1 ELISA, PCR, or rapid ELISA).
Had four (4) (for Group 1) or three (3) (for Group 2)* CD4+ lymphocyte count tests, each performed at least four days apart within the 42-day screening period, with at least three (for Group 1) or two (for Group 2) CD4+ lymphocyte count results greater than 350 cells / mm3.
Not currently receiving antiretroviral drugs.
Committed to not participate in any other clinical trials during the first 12 months of participation in this study.

Exclusion Criteria:

Acute illness.
Fever ≥37.5°C.
Significant symptomatic infection.
Used immunosuppressive medication within 42 days prior to randomization (inhaled and topical corticosteroids were permitted).
Received immunoglobulin or blood products within 42 days prior to randomization.
Received any investigational drug therapy or vaccine within 182 days prior to randomization.
History of having received any adenovirus-vector-based vaccine.
Medical history that may have compromised the evaluation of safety of the subject in the study (e.g., diabetes, seizure disorder, sickle cell disease).
Pregnant or breastfeeding female, or intention to become pregnant during the study within 6 months after receiving the last study vaccination.
Liver function tests >Grade 2 per the toxicity table.
Currently receiving treatment for TB, or evidence of active TB disease based on history, physical examination, chest X-ray, or laboratory evaluation (INH prophylaxis was permitted).

Summary

Placebo

Investigational Vaccine

All Events

Event Type Organ System Event Term Placebo Investigational Vaccine

CD4+ Lymphocyte Count

Assess the effect of AERAS-402 on the CD4+ lymphocyte count after 6 months in HIV-infected, BCG-vaccinated adult subjects with no evidence of active tuberculosis (TB disease) Change in cells/mm^3 pre-vaccination to Study Day 182

Placebo

-136.0
cells/mm^3 (Median)
95% Confidence Interval: -205.0 to 1.0

Investigational Vaccine

-107.0
cells/mm^3 (Median)
95% Confidence Interval: -274.0 to -31.0

Change in HIV Viral Load in HIV-infected, BCG-vaccinated Adult Subjects Before and After Administration of AERAS-402 (From Day 1 to Day 182)

Placebo

-0.163
Change in copies/mL over time (Median)
95% Confidence Interval: -0.274 to 0.336

Investigational Vaccine

-0.011
Change in copies/mL over time (Median)
95% Confidence Interval: -0.357 to 0.281

Mtb-specific T Cell Response in HIV-infected BCG-vaccinated Adult Subjects With no Evidence of TB Disease

Intracellular cytokine staining (ICS) assay immune response was expressed as the percentage of CD4+ and CD8+ T cells producing any one of three cytokines (IFN-γ, TNF-α, or IL-2) or any combination of the three cytokines simultaneously after stimulation with Ag85A, Ag85B, and TB10.4 peptide pools.

Placebo

CD4+ Ag85A response at study day 28

0.0103
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.023

CD4+ Ag85A response at study day 56

0.0199
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0307

CD4+ Ag85B response at study day 28

0.0011
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0166

CD4+ Ag85B response at study day 56

0.0083
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0277

CD4+ TB10.4 response at study day 28

0.0196
percentage of T-cell response (Median)
95% Confidence Interval: 0.0027 to 0.0494

CD4+ TB10.4 response at study day 56

0.0281
percentage of T-cell response (Median)
95% Confidence Interval: 0.007 to 0.0444

CD8+ Ag85A response at study day 28

0.0002
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0019

CD8+ Ag85A response at study day 56

0.0027
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0204

CD8+ Ag85B response at study day 28

CD8+ Ag85B response at study day 56

0.004
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0179

CD8+ TB10.4 response at study day 28

CD8+ TB10.4 response at study day 56

0.0051
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0157

Investigational Vaccine

CD4+ Ag85A response at study day 28

0.0908
percentage of T-cell response (Median)
95% Confidence Interval: 0.0242 to 0.1357

CD4+ Ag85A response at study day 56

0.1248
percentage of T-cell response (Median)
95% Confidence Interval: 0.0537 to 0.2184

CD4+ Ag85B response at study day 28

0.0819
percentage of T-cell response (Median)
95% Confidence Interval: 0.0338 to 0.1069

CD4+ Ag85B response at study day 56

0.0769
percentage of T-cell response (Median)
95% Confidence Interval: 0.0426 to 0.1463

CD4+ TB10.4 response at study day 28

0.0364
percentage of T-cell response (Median)
95% Confidence Interval: 0.0133 to 0.0463

CD4+ TB10.4 response at study day 56

0.0443
percentage of T-cell response (Median)
95% Confidence Interval: 0.0223 to 0.1435

CD8+ Ag85A response at study day 28

0.0127
percentage of T-cell response (Median)
95% Confidence Interval: 0.0019 to 0.0462

CD8+ Ag85A response at study day 56

0.03
percentage of T-cell response (Median)
95% Confidence Interval: 0.004 to 0.0824

CD8+ Ag85B response at study day 28

0.0317
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.114

CD8+ Ag85B response at study day 56

0.0846
percentage of T-cell response (Median)
95% Confidence Interval: 0.0113 to 0.1818

CD8+ TB10.4 response at study day 28

CD8+ TB10.4 response at study day 56

0.0094
percentage of T-cell response (Median)
95% Confidence Interval: 0.0 to 0.0404

Total

26
Participants

Age, Continuous

30.7
years (Mean)
Standard Deviation: 6.07

Age, Categorical

Region of Enrollment

Sex: Female, Male

Overall Study

Placebo

Investigational Vaccine