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DAR-901 TB Booster Vaccine to Prevent TB in Adolescents (DAR-PIA)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02712424
Recruitment Status : Completed
First Posted : March 18, 2016
Last Update Posted : April 7, 2020
Muhimbili University of Health and Allied Sciences
Information provided by (Responsible Party):
C. Fordham von Reyn, Dartmouth-Hitchcock Medical Center

Brief Summary:
DAR-901 booster vaccine or placebo will be administered to adolescents in Tanzania primed with BCG to determine if immunization reduces the risk of TB infection

Condition or disease Intervention/treatment Phase
Tuberculosis Biological: DAR-901 Biological: Sterile saline placebo Phase 2

Detailed Description:

DAR-901 whole cell booster vaccine to prevent TB infection in adolescents ("DAR-PIA")

This is a Phase II, 3-injection, randomized, controlled trial of DAR-901 to be conducted in 13-15 year old adolescents in Tanzania previously immunized with BCG. DAR-901 is a whole cell inactivated non-tuberculous mycobacterial vaccine manufactured from the Master Cell Bank of SRL-172 that was used in the successful Phase III DarDar Trial in Tanzania. The goals are to establish the safety and efficacy of DAR-901 in preventing infection with TB. The 1 mg dose was selected during the current Phase I dose-escalation trial of DAR-901 in the US being conducted by Dartmouth and Aeras. The 1 mg dose corresponds to the dose of SRL 172 used in the DarDar Trial.

All subjects will be screened by the T-spot® IGRA (Oxford Immunotec, Oxford, England) for evidence of TB infection. All screened subjects will have a structured interview to identify risk factors for TB infection (=positive IGRA). IGRA-positive subjects will be referred for further evaluation and will not be entered in the immunization phase of the trial.

It is estimated that 1000 adolescents will need to be screened to identify a total of 650 IGRA-negative adolescents in the immunization phase of the trial. Subjects will be and randomized 1:1 to DAR-901 or saline control at 0, 2 and 4 months. Doses will be administered by intradermal (ID) injection in the deltoid area. IGRA testing will be repeated before dose 2, at 14 months, and again at 24 months.

This three year study began in the first quarter of 2016 in Dar es Salaam, is funded by GHIT-Japan and will be directed by Geisel School of Medicine at Dartmouth (PI, F. von Reyn) with collaborators at Muhimbili University of Health and Allied Sciences (MUHAS) in Tanzania and Tokyo Medical and Dental University in Japan.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 650 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: A Phase 2, Randomized, Placebo-Controlled, Double-Blind, Study of the Prevention of Infection With Mycobacterium Tuberculosis Among Adolescents Who Have Previously Received BCG
Study Start Date : March 2016
Actual Primary Completion Date : February 1, 2020
Actual Study Completion Date : February 1, 2020

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Tuberculosis

Arm Intervention/treatment
Active Comparator: DAR-901
0.1 mL intradermal injection of 1 mg DAR-901
Biological: DAR-901
Placebo Comparator: Placebo
0.1 mL intradermal injection of sterile saline for human use
Biological: Sterile saline placebo

Primary Outcome Measures :
  1. New infection with Mycobacterium tuberculosis [ Time Frame: 2 years ]
    Based on conversion of IGRA

Secondary Outcome Measures :
  1. Persistent new infection with M. tuberculosis [ Time Frame: 2 years ]
    New positive IGRA that is also positive on repeat ≥3 mos later

Information from the National Library of Medicine

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Ages Eligible for Study:   13 Years to 15 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria: Negative IGRA at baseline -

Exclusion Criteria: Pregnancy, serious underlying disease


Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02712424

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Muhimbili University of Health and Allied Sciences
Dar es Salaam, Tanzania
Sponsors and Collaborators
Dartmouth-Hitchcock Medical Center
Muhimbili University of Health and Allied Sciences
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Principal Investigator: C Fordham von Reyn, MD Dartmouth-Hitchcock Medical Center
Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: C. Fordham von Reyn, Professor of Medicine, Dartmouth-Hitchcock Medical Center Identifier: NCT02712424    
Other Study ID Numbers: 29001
First Posted: March 18, 2016    Key Record Dates
Last Update Posted: April 7, 2020
Last Verified: April 2020
Keywords provided by C. Fordham von Reyn, Dartmouth-Hitchcock Medical Center:
Additional relevant MeSH terms:
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Mycobacterium Infections
Actinomycetales Infections
Gram-Positive Bacterial Infections
Bacterial Infections