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Tuberculosis Treatment Shortening Trial

2018. október 11. frissítette: National Institute of Allergy and Infectious Diseases (NIAID)

A Prospective Study of Shortening the Duration of Standard Short Course Chemotherapy From 6 Months to 4 Months in HIV-non-infected Patients With Fully Drug-Susceptible, Non-cavitary Pulmonary Tuberculosis With Negative Sputum Cultures After 2 Months of Anti-TB Treatment

Tuberculosis (TB) is a serious infection that can affect the lungs and other parts of the body. The usual way to treat TB is to take 4 medicines by mouth every day for 2 months, then take 2 of the same medicines for 4 more months, for a total of 6 months. The purpose of this study is to see if taking 4 months of TB medicines is as effective in curing some TB patients as taking 6 months of TB medicines. Study participants will include 758 human immunodeficiency virus (HIV)-non-infected individuals, ages 18-60. Participants will be treated with 4 standard drugs called isoniazid, rifampicin, pyrazinamide and ethambutol. All individuals will take TB medicines for at least 4 months. After 4 months of treatment, if no TB germs are growing in sputum samples, participants will be assigned to either stop taking TB medicine (4 months of treatment) or to continue taking TB drugs for 2 more months (6 months of treatment). Participants will be involved in study procedures for up to 30 months.

A tanulmány áttekintése

Állapot

Befejezve

Körülmények

Beavatkozás / kezelés

Részletes leírás

Tuberculosis (TB) is a major global health problem. TB is the current leading cause of death due to an identifiable infectious agent worldwide. One of the highest priorities for tuberculosis control programs is to shorten anti-TB treatment while maintaining its effectiveness. Current 6-month short course chemotherapy regimens are over 95% effective for the treatment of tuberculosis when fully administered. Six months is a long time, however, and patients frequently discontinue anti-TB treatment once their symptoms have improved. The duration of standard short course chemotherapy is one of the major obstacles to its successful application and poses substantial challenges to programs with respect to patient adherence, program resource needs, and logistical requirements for directly observed therapy. The primary objective of this study is to assess the efficacy of shortening anti-TB treatment to 4 months in human immunodeficiency virus (HIV)-non-infected adults with drug-susceptible, non-cavitary pulmonary tuberculosis who convert their sputum culture to negative after 2 months of treatment. Secondary objectives of this study include: comparing pre-treatment sputum bacillary load in patients with and without cavitary disease; compare time after inoculation of BACTEC or Mycobacteria growth indicator tube (MGIT) liquid culture media until positive with semi-quantitative sputum acid fast bacteria (AFB) smear and culture on solid media as measures of pre-treatment sputum bacillary load; and determining the influence of immunologic characteristics of subjects pre-treatment, during treatment and at the end of therapy on rate of bacillary clearance and risk for relapse. A total of 758 HIV-non-infected adults, male or female, 18-60 years of age, with newly diagnosed initial episodes of sputum AFB smear-positive or -negative, culture-positive, non-cavitary, drug-susceptible pulmonary TB who are sputum culture negative after 2 months of anti-TB treatment will be randomly assigned to complete a total of 4 or 6 months of anti-TB therapy. The experimental regimen will include a total of 4 months of anti-TB treatment [2 months of daily isoniazid (INH), rifampicin, pyrazinamide and ethambutol followed by 2 months of daily INH and rifampicin]. The comparative regimen will include a total of 6 months standard short course anti-TB chemotherapy (2 months of daily INH, rifampicin, pyrazinamide and ethambutol followed by 4 months of daily INH and rifampicin). Subjects will be involved in study related procedures for approximately 30 months after beginning the initial anti-TB treatment.

Tanulmány típusa

Beavatkozó

Beiratkozás (Tényleges)

394

Fázis

  • 3. fázis

Kapcsolatok és helyek

Ez a rész a vizsgálatot végzők elérhetőségeit, valamint a vizsgálat lefolytatásának helyére vonatkozó információkat tartalmazza.

Tanulmányi helyek

  • Brazília
    • Espírito Santo
      • Vitória, Espírito Santo, Brazília, 29040-091
        • Universidade Federal do Espirito Santo - Duke Hubert-Yeargan Center
  • Fülöp-szigetek
    • National Capital Region
      • Makati, National Capital Region, Fülöp-szigetek, 1229
        • Makati Medical Center
  • Uganda
      • Kampala, Uganda, 99999
        • Mulago Hospital Complex

Részvételi kritériumok

A kutatók olyan embereket keresnek, akik megfelelnek egy bizonyos leírásnak, az úgynevezett jogosultsági kritériumoknak. Néhány példa ezekre a kritériumokra a személy általános egészségi állapota vagy a korábbi kezelések.

Jogosultsági kritériumok

Tanulmányozható életkorok

18 év (Felnőtt)

Egészséges önkénteseket fogad

Nem

Tanulmányozható nemek

Összes

Leírás

Inclusion Criteria:

-Adults, male or female, aged 18-60. -Newly diagnosed initial episodes of pulmonary tuberculosis. Sputum smear-positive and -negative patients are eligible for enrollment. The diagnosis of tuberculosis must be confirmed by culture. Acid fast bacteria (AFB) smear positive patients found later not to have tuberculosis (TB) (i.e. those with non-tuberculous mycobacterial disease) and those without culture confirmation [at least one culture on solid media growing > 10 colonies of Mycobacterium tuberculosis (MTB) or a positive BACTEC or Mycobacteria growth indicator tube (MGIT) enriched liquid culture growing MTB] will be removed from the study. -Chest X-ray and clinical findings consistent with tuberculosis. -Hemoglobin greater than or equal to 8 gm/dL (greater than or equal to 5.0 mmol/L). -Serum creatinine < 2 mg/dL (< 177 micro mol/L). -Serum aspartate aminotransferase (AST) < 1.5 times the upper limit of normal for the testing laboratory, and serum total bilirubin < 1.3 mg/dL (22.2 micro mol/L). -Random serum glucose less than or equal to 150 mg/dl (8.3 mmol/L). -Ambulatory. -Willing to provide informed consent for study participation, provide required specimens for examination, and to undergo and receive results of human immunodeficiency virus (HIV) testing. -Willing to receive supervised anti-TB treatment. -Completion of the required 112 doses of chemotherapy within 18 weeks of starting treatment.

Exclusion Criteria:

-Human immunodeficiency virus (HIV)-infected. -History of prior tuberculosis or history of previous tuberculosis treatment. -Pregnant or breastfeeding. -Cavitary tuberculosis on initial chest X-ray (taken within 14 days of study entry). -Exposure to person(s) with known drug resistant tuberculosis. -Patients receiving chronic steroids or other immunosuppressive medications. -Extra-pulmonary tuberculosis. -Patients with drug resistant tuberculosis (resistance to isoniazid (INH), rifampicin, pyrazinamide or ethambutol). -Professional sex worker, alcoholic and/or intravenous (IV) drug abuser. -Silicosis or other serious chronic medical problems including diabetes mellitus or chronic renal failure. Final determination of eligibility will be made after review of drug susceptibility testing results on an initial sputum isolate and results of all sputum cultures. Pregnant patients may not be enrolled in the study. Patients in the 4 month arm who become pregnant during months 5 and 6 of study participation will be dropped from the study and receive an additional 2 months of treatment with INH and rifampicin.

Tanulási terv

Ez a rész a vizsgálati terv részleteit tartalmazza, beleértve a vizsgálat megtervezését és a vizsgálat mérését.

Hogyan készül a tanulmány?

Tervezési részletek

  • Elsődleges cél: Kezelés
  • Kiosztás: Véletlenszerűsített
  • Beavatkozó modell: Párhuzamos hozzárendelés
  • Maszkolás: Nincs (Open Label)

Fegyverek és beavatkozások

Résztvevő csoport / kar
Beavatkozás / kezelés
Kísérleti: 2EHRZ/2HR arm
Daily treatment with isoniazid (INH), rifampicin, ethambutol and pyrazinamide for 2 months followed by 2 months of daily INH plus rifampicin over a maximum time period of 18 weeks.
Drog: Ethambutol
Mycobacteriostatic agent given to prevent emergence of drug resistance to other 1st line drugs; dosages are 15-25 milligram (mg)/ kilogram (kg)/day (d).
Drog: Isoniazid
Hydrazide of isonicotininc acid; antimicrobial activity is limited to mycobacteria where it inhibits the synthesis of mycolic acids.
Drog: Pyrazinamide
1st line bactericidal agent; dosages are 15-30 mg/kg/d, up to 2 grams (gm)/d.
Drog: Rifampin
1st line bactericidal agent which inhibits deoxyribonucleic acid (DNA)-dependent ribonucleic acid (RNA) polymerase; dosages are 10 mg/kg/d (up to 600 mg/d).
Aktív összehasonlító: 2EHRZ/4HR arm
Daily treatment with Isoniazid (INH), rifampicin, ethambutol and pyrazinamide for 2 months followed by 4 months of daily INH plus rifampicin over a maximum time period of 28 weeks.
Drog: Ethambutol
Mycobacteriostatic agent given to prevent emergence of drug resistance to other 1st line drugs; dosages are 15-25 milligram (mg)/ kilogram (kg)/day (d).
Drog: Isoniazid
Hydrazide of isonicotininc acid; antimicrobial activity is limited to mycobacteria where it inhibits the synthesis of mycolic acids.
Drog: Pyrazinamide
1st line bactericidal agent; dosages are 15-30 mg/kg/d, up to 2 grams (gm)/d.
Drog: Rifampin
1st line bactericidal agent which inhibits deoxyribonucleic acid (DNA)-dependent ribonucleic acid (RNA) polymerase; dosages are 10 mg/kg/d (up to 600 mg/d).

Mit mér a tanulmány?

Elsődleges eredményintézkedések

Eredménymérő
Intézkedés leírása
Időkeret
Bacteriologic or Clinical Relapse at 30 Months After Onset of Initial Anti-tuberculosis (TB) Treatment - Intention-to-treat
Időkeret: 30 months
Patients who presented with TB after completion of study phase treatment but before the end of follow-up were classified as relapses. A bacteriologic relapse was defined as a patient who became consistently culture-positive [defined as at least 1 of the following]: (a) at least 1 sputum mycobacterial culture growing at least 10 colonies of MTB on solid medium; (b) 2 or more respiratory secretion cultures that are positive for MTB in liquid media; or (c) any culture from an extrapulmonary site that is positive for MTB during follow-up after successful completion of initial anti-TB treatment.
30 months
Bacteriologic or Clinical Relapse at 30 Months After Onset of Initial Anti-TB Treatment - Per-protocol
Időkeret: 30 months
Patients who presented with TB after completion of study phase treatment but before the end of follow-up were classified as relapses. A bacteriologic relapse was defined as a patient who became consistently culture-positive [defined as at least 1 of the following]: (a) at least 1 sputum mycobacterial culture growing at least 10 colonies of MTB on solid medium; (b) 2 or more respiratory secretion cultures that are positive for MTB in liquid media; or (c) any culture from an extrapulmonary site that is positive for MTB during follow-up after successful completion of initial anti-TB treatment.
30 months

Másodlagos eredményintézkedések

Eredménymérő
Intézkedés leírása
Időkeret
Treatment Failures or Relapses at 2 Years After Completion of TB Treatment: Intention to Treat
Időkeret: 2 years
A culture-positive treatment failure was defined as initial culture conversion but subsequent reversion to culture positivity. A clinical treatment failure was defined as a patient with clinical and/or radiographic evidence of progressive tuberculosis not confirmed by a positive culture after 4 or more months of anti-TB treatment while still receiving treatment. Patients who defaulted before completing study treatment and returned later with culture-positive tuberculosis were termed failures after non-adherence.
2 years
Treatment Failures or Relapses at 2 Years After Completion of TB Treatment: Per Protocol
Időkeret: 2 years
A culture-positive treatment failure was defined as initial culture conversion but subsequent reversion to culture positivity. A clinical treatment failure was defined as a patient with clinical and/or radiographic evidence of progressive tuberculosis not confirmed by a positive culture after 4 or more months of anti-TB treatment while still receiving treatment. Patients who defaulted before completing study treatment and returned later with culture-positive tuberculosis were termed failures after non-adherence.
2 years
Relapses at 1 and 2 Years
Időkeret: 1 and 2 years after successful completion of initial anti-TB treatment
1 and 2 years after successful completion of initial anti-TB treatment
Acquired Drug Resistance in Patients Who Relapsed
Időkeret: 2 years
2 years
Immunologic: Changes in Cytokine Levels in Mycobacterium Tubercolosis (MTB) Antigen-stimulated Whole Blood Culture Supernatants - Results Are Pending
Időkeret: After 2 and 6 months of anti-TB treatment and upon relapse
After 2 and 6 months of anti-TB treatment and upon relapse
Immunologic: Store Peripheral Blood Mononuclear Cells (PBMC) - Results Are Pending
Időkeret: Pre-treatment and serum pre-treatment after 2 and 6 months of anti-TB treatment, and at the time of relapse for future immunologic analysis
Pre-treatment and serum pre-treatment after 2 and 6 months of anti-TB treatment, and at the time of relapse for future immunologic analysis
Immunologic: Changes in Sputum Cytokine Levels - Results Are Pending
Időkeret: After 1 and 2 months of anti-TB treatment
After 1 and 2 months of anti-TB treatment
Microbiologic: Changes in Sputum Mycobacterial mRNA - Results Are Pending
Időkeret: At 1 and 2 months of anti-TB treatment, and upon relapse
At 1 and 2 months of anti-TB treatment, and upon relapse
Microbiologic: Time After Inoculation Until Culture Positive in BACTEC 460 or MGIT 960 Enriched Liquid Media After 2 Months in Treatment - Results Are Pending
Időkeret: Months 1, 2, 3, 4, 5, 6, 9, 12, 15, 18, 24, and 30
Months 1, 2, 3, 4, 5, 6, 9, 12, 15, 18, 24, and 30

Együttműködők és nyomozók

Itt találhatja meg a tanulmányban érintett személyeket és szervezeteket.

Szponzor

National Institute of Allergy and Infectious Diseases (NIAID)

Publikációk és hasznos linkek

A vizsgálattal kapcsolatos információk beviteléért felelős személy önkéntesen bocsátja rendelkezésre ezeket a kiadványokat. Ezek bármiről szólhatnak, ami a tanulmányhoz kapcsolódik.

Általános kiadványok

Tanulmányi rekorddátumok

Ezek a dátumok nyomon követik a ClinicalTrials.gov webhelyre benyújtott vizsgálati rekordok és összefoglaló eredmények benyújtásának folyamatát. A vizsgálati feljegyzéseket és a jelentett eredményeket a Nemzeti Orvostudományi Könyvtár (NLM) felülvizsgálja, hogy megbizonyosodjon arról, hogy megfelelnek-e az adott minőség-ellenőrzési szabványoknak, mielőtt közzéteszik őket a nyilvános weboldalon.

Tanulmány főbb dátumok

Tanulmány kezdete (Tényleges)

2002. április 8.

Elsődleges befejezés (Tényleges)

2008. szeptember 2.

A tanulmány befejezése (Tényleges)

2008. november 28.

Tanulmányi regisztráció dátumai

Először benyújtva

2005. augusztus 12.

Először nyújtották be, amely megfelel a minőségbiztosítási kritériumoknak

2005. augusztus 12.

Első közzététel (Becslés)

2005. augusztus 15.

Tanulmányi rekordok frissítései

Utolsó frissítés közzétéve (Tényleges)

2018. november 8.

Az utolsó frissítés elküldve, amely megfelel a minőségbiztosítási kritériumoknak

2018. október 11.

Utolsó ellenőrzés

2010. április 20.

Több információ

A tanulmányhoz kapcsolódó kifejezések

Kulcsszavak

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Ezt az információt közvetlenül a clinicaltrials.gov webhelyről szereztük be, változtatás nélkül. Ha bármilyen kérése van vizsgálati adatainak módosítására, eltávolítására vagy frissítésére, kérjük, írjon a következő címre: register@clinicaltrials.gov. Amint a változás bevezetésre kerül a clinicaltrials.gov oldalon, ez a webhelyünkön is automatikusan frissül. .

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