TB Nutrition, Immunology and Epidemiology

August 26, 2010 updated by: National Institute of Allergy and Infectious Diseases (NIAID)

Nutrition, Immunology, and Epidemiology of Tuberculosis

The purpose of this study is to see whether people who take vitamins along with the standard medicine for tuberculosis (TB) recover better and quicker than people who take only the standard medicine for TB. This study will enroll 600 men and women, who are age 18-65 years, have TB, and intend to stay in Dar-es-Salaam for at least 2 years from the start of TB therapy. Half the participants will have active TB and also HIV infection, and the other half will have TB alone. Half the volunteers will be given vitamins, and the other half will be given placebo (sugar pill with no vitamins) from the start of their TB therapy, through the 8 months of anti-TB therapy, and up to 48 months. Participation in the study involves visits to the clinic, physical exams, home visits, and answering questions about personal health, foods eaten, household, occupation, and education. Volunteers will also provide blood, sputum, and urine samples.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

This double blinded, randomized, placebo controlled trial will enroll 600 men and women, who are age 18 to 65 years inclusive, have at least two positive sputum smears for tuberculosis (TB), intend to stay in Dar-es-Salaam (DSM) for at least 2 years from the start of TB therapy, and have given informed consent to participate in the study. Half of the enrollees will have active TB and co-infection with HIV, and the other half will have TB alone. The effect of micronutrient status will be examined in the context of a randomized trial conducted in Tanzania. Subjects will be randomized to receive either multi-micronutrients or placebo from the start of their TB therapy, through the 8 months of anti-TB therapy, and until the last recruited patient reaches 24 months of follow up. Thus, the first subject is likely to be followed for 48 months, assuming the duration of recruitment is 24 months. The endpoints of interest include bacteriologic cure, immune response parameters, and clinical outcomes. The researchers will also examine the utility of these immune response parameters as surrogate markers for treatment efficacy in TB, irrespective of nutritional and other risk factors. The study will be carried out as a collaborative effort between Harvard School of Public Health; Muhimbili University College of Health Sciences, Dar es Salaam, Tanzania; Tufts University, Boston; and the Channing Laboratory, Boston. Subjects will be randomly assigned to receive a daily oral dose of one of two treatments: (a) micronutrients: 5000 IU of retinol, 20 mg of B1, 20 mg of B2, 25 mg of B6, 100 mg of niacin, 50 mcg of B12, 500 of C, 200 mg of E, 0.8 mg of folic acid, and 100 mcg of selenium; or (b) placebo. The primary objectives are to: (1) determine the efficacy of micronutrient supplements on sputum and culture negativity at one month and two months; (2) determine the efficacy of micronutrient supplements on survival between two arms at 8 and 24 months; and (3) determine the efficacy of micronutrient supplements on TB relapse and reinfection. Secondary study objectives are to: (1) compare the treatment arms with respect to rate of change of HIV viral load in HIV positive subjects measured at 0, 2, 8, and 20 months; (2) compare the treatment arms with respect to absolute change in CD4 counts from 0 to 2, 8, 20 months; (3) compare the treatment arms with respect to weight change from baseline and 2 months, 8 months, and 20 months; (4) compare the treatment arms with respect to immunological parameters, namely ex vivo lymphocyte proliferation; and cytokine production, namely IL-2, INF-g, IL-12, and TNF-a, at 2, 8, 20 months; and (5) correlate the above mentioned immunological markers with smear conversion rates at 1 month, 2 months, cure, relapse, and death.

Study Type

Interventional

Enrollment

887

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Tanzania
      • Dar Es Salaam, Tanzania
        • Muhimbili University, College of Health Sciences

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Men and women, age 18 to 65 years inclusive
  2. At least two positive sputum smears for tuberculosis (TB)
  3. Intention to stay in Dar-es-Salaam for at least 2 years after the start of TB therapy
  4. Subjects who grant informed consent to participation
  5. Subject is assigned to a treatment clinic where International Collarborations in Infectious Disease Research (ICIDR) staff can follow that patient, either at that clinic directly, or through referral to a nearby clinic for research visits.

Exclusion Criteria:

  1. Karnofsky score < 40%
  2. Hemoglobin < 8.5 g/dl
  3. Having had treatment for TB exceeding 4 weeks in the last 5 years
  4. Pregnant women: Women who are pregnant at the time of enrollment will also be excluded, given that all pregnant women receive folate and iron supplements as part of routine prenatal services. Also, it is not possible to enroll enough pregnant women to examine the effect of the supplements in this subset.
  5. Patient is mentally incapable of understanding the consent form; patient is a prisoner or in police custody; or patient is deaf/dumb.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2000

Study Completion

October 1, 2005

Study Registration Dates

First Submitted

September 9, 2005

First Submitted That Met QC Criteria

September 9, 2005

First Posted (Estimate)

September 15, 2005

Study Record Updates

Last Update Posted (Estimate)

August 27, 2010

Last Update Submitted That Met QC Criteria

August 26, 2010

Last Verified

February 1, 2007

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 00-032

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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