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Paradoksale tuberkulosereaktioner hos patienter uden hiv-infektion

Background:

Most people with tuberculosis (TB) feel better after starting treatment. But for some people, the opposite happens. They may feel better at first, but then suddenly get worse. This is a paradoxical reaction. Researchers want to better understand what causes this reaction and what happens after someone has it.

Objective:

To learn about paradoxical reactions to TB treatment.

Eligibility:

Adults 18 and older diagnosed with confirmed or suspected TB and currently on treatment for at least 2 weeks, with or without signs/symptoms of a paradoxical inflammatory reaction.

Design:

Participants will be screened with a physical exam and medical history. They will give blood and urine samples.

Eligible participants will visit either the NIH Clinical Center or the Mexico Clinic sites 3 times over 6 to 18 months. Each visit will take 7 hours to complete; visits may be scheduled over more than 1 day. Participants may have more visits if their TB symptoms change.

Participants will give blood, urine, and sputum samples. They will have adverse event assessments. They will have 2 to 3 positron emission tomography/computed tomography (PET/CT) scans. PET/CT scans make pictures of the inside of the body. For this, participants will lie on a table that slides into a donut-shaped scanner. They will get a small amount of radioactive dye through an IV, which is a small plastic tube placed in a vein in the arm using a needle.

Participants may have optional apheresis at the NIH site only. For this, blood is taken from a needle in one arm. White blood cells are separated from the rest of the blood. The rest of the blood is returned through a needle in the other arm.

Studieoversigt

Status

Rekruttering

Betingelser

Detaljeret beskrivelse

Paradoxical reaction in non-HIV tuberculosis (TB) is a clinical and/or radiologic worsening of a patient s pre-existing TB while receiving anti-TB medications. This phenomenon has been clinically well described for many years and is thought to occur in 10%-25% of HIV-negative patients starting treatment for TB. Paradoxical reactions are diagnosed by excluding other possible causes for worsening of TB signs and symptoms, such as a second infection or treatment failure. However, challenges in culturing TB can complicate early diagnosis of paradoxical reactions.

This is a multisite, international observational study intended to improve understanding of the pathogenesis of paradoxical response to treatment in TB-infected patients who do not have HIV. Each site will follow up to 20 patients with TB who have already initiated or have previously completed treatment and are suspected to have paradoxical reactions, as well as about 40 patients taking TB treatment without signs of paradoxical reactions (controls). All participants will have regular study visits for clinical assessments, blood and sputum collections, positron emission tomography-computed tomography (PET/CT) scans, and optional leukapheresis. Radiography and laboratory evaluations will be performed to identify biomarkers, clinical signs, and molecular explanations for paradoxical reactions. Better understanding of characteristics of paradoxical reactions will assist in earlier diagnosis or even prediction.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

140

Kontakter og lokationer

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

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

    • Maryland
      • Bethesda, Maryland, Forenede Stater, 20892
        • Rekruttering
        • National Institutes of Health Clinical Center
        • Kontakt:
          • For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR)
          • Telefonnummer: TTY8664111010 800-411-1222
          • E-mail: prpl@cc.nih.gov
      • Mexico City, Mexico, 14080
        • Rekruttering
        • Mexican Emerging Infectious Diseases Clinical Research Network (LaRed) INCMNSZ
        • Kontakt:
      • Mexico City, Mexico, 14080
        • Rekruttering
        • Mexican Emerging Infectious Diseases Clinical Research Network (LaRed) INER
        • Kontakt:

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

18 år til 99 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Prøveudtagningsmetode

Sandsynlighedsprøve

Studiebefolkning

Participants will be recruited from clinics in the surrounding Washington, DC area for the NIH site; and from clinics in Mexico for the foreign site

Beskrivelse

  • INCLUSION CRITERIA:

Suspected Paradoxical Reaction Group Criteria:

  1. Aged greater than or equal to 18 years.

  2. Diagnosed with confirmed (microbiologically or with molecular methods) or suspected (clinical plus or minus histologic diagnosis) TB and currently on ATT for a minimum of 2 weeks, or have completed ATT, with at least 2 of the following signs/symptoms of a paradoxical inflammatory reaction:

    • Recrudescent symptoms of TB after initial clinical improvement.
    • Change in physical exam after initial clinical improvement suggestive of new inflammatory process (e.g., lymphadenopathy or new findings on pulmonary exam).
    • Worsening radiographic evidence of disease after initiation of treatment, as compared with imaging prior to or earlier in treatment.
    • Laboratory evidence of acute inflammatory response, including the development of leukocytosis (white blood cell count > 10,000 cells/microL) or a change of C-reactive protein (CRP) > 5 mg/L compared to prior laboratory values.
    • Worsened organ function after initial clinical improvement.
  3. The above sign/symptom(s) cannot be explained by a newly acquired infection, clinical course of a previously recognized infectious agent, side effects of the ATT, the presence of drug resistance, or any other condition except for paradoxical reaction.

  4. Willingness to allow storage of blood or tissue samples for future research.

  5. Ability of participant to understand study requirements and give informed consent.

  6. Has a primary care physician and is being followed by the local Department of Health for their TB (or has plans to arrange after enrollment if enrolled early in course from inpatient transfer).

Control Group Criteria:

  1. Aged greater than or equal to 18 years.
  2. Diagnosed with confirmed (microbiologically or with molecular methods) or suspected (clinical plus or minus histologic diagnosis) TB.
  3. Presenting 2 to 4 months after starting ATT to match timing of paradoxical reactions.
  4. Willingness to allow storage of blood or tissue samples for future research.
  5. Ability of participant to understand study requirements and give informed consent.
  6. Has a primary care physician and is being followed by the Department of Health for their TB (or has plans to arrange after enrollment if enrolled early in course from inpatient transfer).

EXCLUSION CRITERIA:

Individuals in either group who meet any of the following criteria will be excluded from study participation:

  1. HIV infection. (Individuals with HIV infection may be eligible for a separate study exclusively evaluating persons living with HIV.)
  2. Pregnant or breastfeeding.
  3. Uncontrolled psychiatric disease, substance use, or inappropriate conduct unsuitable for a research study.
  4. Malignancy requiring imminent or ongoing treatment including radiation, chemotherapy, or immunotherapy.
  5. Debilitating or chronic conditions that would limit ability to participate in the study.
  6. Emergent or urgent clinical conditions not due to studied disease of interest requiring immediate treatment that would be unsuitable for a research study. These patients would be transferred to an emergency room and able to rescreen when condition has been stabilized.

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Observationsmodeller: CASE_CONTROL
  • Tidsperspektiver: PROSPECTIVE

Kohorter og interventioner

Gruppe / kohorte
1

Patients with TB who have already initiated treatment and are suspected to have paradoxical reactions

2

Patients with TB who have already initiated treatment without signs of paradoxical reactions (control)

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Immunologic and radiographic responses of TB patients with suspected paradoxical reactions.
Tidsramme: Throughout study

Characterize immunologic and radiographic responses of TB patients with suspected paradoxical reactions.

Throughout study

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Biomarkers and/or microbiologic burden correlate with paradoxical TB reactions.
Tidsramme: Throughout study

Determine whether biomarkers and/or microbiologic burden correlate with paradoxical TB reactions.

Throughout study

Samarbejdspartnere og efterforskere

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

Sponsor

Efterforskere

  • Ledende efterforsker: Maura M Manion, M.D., National Institute of Allergy and Infectious Diseases (NIAID)

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.

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)

20. december 2019

Primær færdiggørelse (Anslået)

30. april 2029

Studieafslutning (Anslået)

30. april 2029

Datoer for studieregistrering

Først indsendt

8. august 2019

Først indsendt, der opfyldte QC-kriterier

8. august 2019

Først opslået (Faktiske)

9. august 2019

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

2. november 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. oktober 2026

Sidst verificeret

29. oktober 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • 190133
  • 19-I-0133

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

No plan at this time.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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