A Phase I Study of a New Tuberculosis (TB) Vaccine, MVA85A, in Healthy Volunteers With HIV

University of Oxford

Status and phase

Completed

Phase 1

Conditions

Tuberculosis

Treatments

Biological: MVA85A

Study type

Interventional

Funder types

Other

Identifiers

NCT00731471

TB019

Details and patient eligibility

About

This is an open Phase I study of a candidate TB vaccine, MVA85A, in healthy subjects who are infected with HIV. It is designed to study the safety and immunogenicity of the vaccine.

Full description

This study is designed to evaluate the safety of MVA85A in healthy volunteers in Senegal who are infected with HIV. In phase I studies, a single vaccination with MVA85A, when administered at a dose of 5 x 107pfu intradermally, has been shown to be safe in both mycobacterially naïve individuals, those previously vaccinated with BCG and latently infected individuals. We will use 1 x 10^8 pfu MVA85A intradermally in this study. A trial in BCG vaccinated subjects showed that the higher dose (1 x 10^8 pfu MVA85A) induced a significantly higher immune response but did not have a higher AE profile. In addition, because of a variable immune response, the trial in HIV positive subjects in the UK is split into two groups, the first getting 5 x 10^7 pfu and the second getting 1 x 10^8 pfu MVA85A. It has, therefore, been decided to use the higher dose in order to maximise the immune response whilst maintaining a good safety profile.

Enrollment

24 estimated patients

Sex

All

Ages

18 to 50 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Healthy adults aged 18 to 50 years
Resident in or near Dakar for the duration of the study
Willingness to allow the investigators to discuss the volunteer's medical history with the volunteer's HIV lead physician
Willing to use effective contraception throughout duration of study (if female)
HIV antibody positive; diagnosed at least 6 months previously
CD4 count >300
Arm 1: HIV viral load not >100,000 copies per millilitre
Arm 2: Undetectable HIV viral load
Written informed consent

Exclusion criteria

Any clinically significant abnormal finding on screening biochemistry or haematology blood tests or on urinalysis
Group 1 only: Any ARV therapy within the past 6 months
Previous history of TB disease and/or treatment
Any AIDS defining illness
Group 1: CD4 count nadir <300
Group 2: CD4 count nadir <100
CXR showing TB or evidence of other active infection
Prior receipt of a recombinant MVA or Fowlpox vaccine
Use of any investigational or non-registered drug, live vaccine or medical device other than the study vaccine within 30 days preceding dosing of study vaccine, or planned use during the study period
Administration of chronic (defined as more than 14 days) immunosuppressive drugs or other immune modifying drugs within six months of vaccination. (For corticosteroids, this will mean prednisolone, or equivalent, ≥ 0.5 mg/kg/day. Inhaled and topical steroids are allowed.)
History of allergic disease or reactions likely to be exacerbated by any component of the vaccine, e.g. egg products
Presence of any underlying disease that compromises the diagnosis and evaluation of response to the vaccine (including evidence of cardiovascular disease, history of cancer (except basal cell carcinoma of the skin and cervical carcinoma in situ), history of insulin requiring diabetes mellitus, any ongoing chronic illness requiring ongoing specialist supervision (e.g., gastrointestinal), and chronic or active neurological disease)
History of > 2 hospitalisations for invasive bacterial infections (pneumonia, meningitis)
Suspected or known current drug and/or alcohol abuse
Seropositive for hepatitis B surface antigen (HBsAg) and/ or hepatitis C (antibodies to HCV)
Evidence of serious psychiatric condition
Any other on-going chronic illness requiring hospital specialist supervision
Any confirmed or suspected immunosuppressive or immunodeficient condition, other than HIV infection, such as asplenia
Evidence of hepatomegaly
Administration of immunoglobulins and/or any blood products within the three months preceding the planned administration of the vaccine candidate
Pregnant/lactating female and any female who is willing or intends to become pregnant during the study
Any history of anaphylaxis in reaction to vaccination
PI assessment of lack of willingness to participate and comply with all requirements of the protocol, or identification of any factor felt to significantly increase the participant's risk of suffering an adverse outcome