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Nye strategier til vurdering af holdbarheden af ​​levedygtige bakterier i latent og aktiv tuberkulose (TB-LIVE)

24. september 2026 opdateret af: Region Skane

Current diagnostic tools such as interferon gamma release assay (IGRA) and purified protein derivative (PPD) can not distinguish patients with latent tuberculosis infection (LTBI) and persistence of live mycobacteria. This inability to rule out living mycobacteria in patients investigated for LTBI leads to unnecessary and potentially harmful treatment regimes all around the globe.

The goal of this observational study is to identify candidate biomarkers for viable bacilli in latent tuberculosis in order to decrease the use of unnecessary and ineffective antibiotic treatment.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

Tuberculosis (TB) is the second leading cause of death due to a single infectious agent, with the main burden in resource-limited settings and in vulnerable populations. It is estimated that approximately 25% of the global population is infected with TB. LTBI is a condition where the mycobacteria rests within the body instead of creating active disease. About half of the active TB cases develop within 2 years of exposure and the other half reactivates as distant as several decades post exposure. Persistence of viable bacilli is a prerequisite for the reactivation of TB.

Through sampling of peripheral blood the investigators will investigate how selected cytokines, enzyme activity and gene expression changes during course of treatment, 4-6 months, and during follow up, 1 year. These patterns will be compared to the patterns of patients with: latent TB without treatment, active TB with treatment as well as healthy controls. Samples will be drawn at 0, 1, 6 and 12 months, after treatment initialization when applicable. Healthy controls will only be sampled once. Most of the analysis will be performed on TB-antigen stimulated blood.

The investigators hypothesize that there is a substantial fraction of latent TB patients who do not harbor live mycobacteria and that this is reflected in study outcome measures when given treatment. Furthermore, the investigators hypothesize that this fraction of latent TB patients will resemble healthy controls in terms of outcome measures whereas their counterpart, latent TB patients harboring living bacteria, will not.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

89

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Sverige
    • Skåne County
      • Malmö, Skåne County, Sverige, 20502
        • Skåne University Hospital

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

15 år til 100 år (Barn, Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

Individuals 15 years or older diagnosed with latent- or active tuberculosis or found healthy as part of routine care at the out- and inpatient department of the department for infectious diseases at Skåne University Hospital in Malmö, Sweden

Beskrivelse

LTBI (2 groups)

Inclusion Criteria:

  • latent tuberculosis: Interferon gamma (IFN-γ) >0.70 IU/ml in the Quantiferon-TB Plus assay
  • age 15-25 years OR high likelihood of recent TB transmission
  • informed consent

Exclusion Criteria:

  • active tuberculosis
  • chronic illness
  • immunosuppressive treatment
  • pregnancy (including 6 months post-partum)
  • previous treatment for either active or latent TB infection

Controls

Inclusion Criteria:

  • age 15-25 years
  • informed consent

Exclusion Criteria:

  • latent- OR active tuberculosis
  • chronic illness
  • immunosuppressive treatment
  • pregnancy (including 6 months post-partum)
  • previous treatment for either active or latent TB infection

Active TB

Inclusion Criteria:

  • diagnosed with active TB
  • informed consent

Exclusion Criteria:

age < 15 years

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: COHORT
  • Tidsperspektiver: PROSPECTIVE

Kohorter og interventioner

Gruppe / kohorte
Latent TB on treatment

Treatment according to existing Swedish guidelines with:

Oral rifampicin 10 mg/kg (max 600mg) once daily during 4 months OR Oral isoniazide 5 mg/kg (max 300mg) once daily in combination with 40mg vitamin B6 (pyridoxin) during 6 months
Latent TB not on treatment

Latent TB without indication for treatment OR patient who do not want to receive treatment
Active TB with treatment

Treatment according to existing Swedish guidelines. Duration and choice of antibiotic therapy depending on the condition.
Healthy control

Healthy

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cytokine levels
Tidsramme: 0-12 months

To determine levels of selected cytokines in supernatants of Mtb-incubated whole blood obtained from persons diagnosed with LTBI during the course of treatment, and to identify patterns of cytokine expression suggestive of bacterial eradication.
0-12 months
Gene expression
Tidsramme: 0-12 months

To characterize patterns of small non-coding RNA (sncRNA) expression (including microRNAs) in blood and plasma from persons diagnosed with LTBI, and to identify patterns of sncRNA expression in individuals with LTBI suggestive of bacterial eradication.
0-12 months
Activity of indoleamine 2, 3-dioxygenase (IDO)
Tidsramme: 0-12 months

3. To characterize IDO activity in plasma from persons diagnosed with LTBI, and to determine whether changes in IDO activity during the course of LTBI reflect bacterial eradication
0-12 months

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Region Skane

Efterforskere

  • Ledende efterforsker: Per Björkman, Professor, Lund University, Faculty of Medicine, Department of Translational Medicine

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

21. december 2021

Primær færdiggørelse (Faktiske)

1. december 2025

Studieafslutning (Faktiske)

1. december 2025

Datoer for studieregistrering

Først indsendt

10. november 2022

Først indsendt, der opfyldte QC-kriterier

10. november 2022

Først opslået (Faktiske)

18. november 2022

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

29. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

24. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2021-04885

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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