Reazioni paradossali alla tubercolosi in pazienti senza infezione da HIV
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.
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Descrizione dettagliata
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.
Tipo di studio
Tipo di studio
Iscrizione (Stimato)
Iscrizione
Contatti e Sedi
Contatto studio
Contatto studio
- Nome: Maura M Manion, M.D.
- Numero di telefono: (301) 312-2103
- Email: maura.manion@nih.gov
Backup dei contatti dello studio
- Nome: Mary E McLaughlin, R.N.
- Numero di telefono: (301) 435-8001
- Email: mmclaughli@niaid.nih.gov
Luoghi di studio
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Mexico City, Messico, 14080
- Reclutamento
- Mexican Emerging Infectious Diseases Clinical Research Network (LaRed) INCMNSZ
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Contatto:
- Luis Ponce de Leon Garduno
- Numero di telefono: 55 54870900 Not Listed
- Email: luis.ponceg@incmnsz.mx
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Mexico City, Messico, 14080
- Reclutamento
- Mexican Emerging Infectious Diseases Clinical Research Network (LaRed) INER
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Contatto:
- Norma Angelica Tellez Navarrete
- Numero di telefono: 55 54871700 Not Listed
- Email: norma.tellez@gmail.com
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Maryland
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Bethesda, Maryland, Stati Uniti, 20892
- Reclutamento
- National Institutes of Health Clinical Center
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Contatto:
- For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR)
- Numero di telefono: TTY8664111010 800-411-1222
- Email: prpl@cc.nih.gov
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Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Metodo di campionamento
Popolazione di studio
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
Descrizione
- INCLUSION CRITERIA:
Suspected Paradoxical Reaction Group Criteria:
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Aged greater than or equal to 18 years.
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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.
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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.
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Willingness to allow storage of blood or tissue samples for future research.
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Ability of participant to understand study requirements and give informed consent.
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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:
- Aged greater than or equal to 18 years.
- Diagnosed with confirmed (microbiologically or with molecular methods) or suspected (clinical plus or minus histologic diagnosis) TB.
- Presenting 2 to 4 months after starting ATT to match timing of paradoxical reactions.
- Willingness to allow storage of blood or tissue samples for future research.
- Ability of participant to understand study requirements and give informed consent.
- 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:
- HIV infection. (Individuals with HIV infection may be eligible for a separate study exclusively evaluating persons living with HIV.)
- Pregnant or breastfeeding.
- Uncontrolled psychiatric disease, substance use, or inappropriate conduct unsuitable for a research study.
- Malignancy requiring imminent or ongoing treatment including radiation, chemotherapy, or immunotherapy.
- Debilitating or chronic conditions that would limit ability to participate in the study.
- 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.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Modelli osservazionali: CASE_CONTROL
- Prospettive temporali: PROSPECTIVE
Numero di gruppi/coorti
Coorti e interventi
Gruppo / CoorteGruppo / Coorte |
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1
Patients with TB who have already initiated treatment and are suspected to have paradoxical reactions |
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2
Patients with TB who have already initiated treatment without signs of paradoxical reactions (control) |
Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Immunologic and radiographic responses of TB patients with suspected paradoxical reactions.
Lasso di tempo: Throughout study
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Characterize immunologic and radiographic responses of TB patients with suspected paradoxical reactions. |
Throughout study
|
Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Biomarkers and/or microbiologic burden correlate with paradoxical TB reactions.
Lasso di tempo: Throughout study
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Determine whether biomarkers and/or microbiologic burden correlate with paradoxical TB reactions. |
Throughout study
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Collaboratori e investigatori
Sponsor
Sponsor
Investigatori
Investigatori
- Investigatore principale: Maura M Manion, M.D., National Institute of Allergy and Infectious Diseases (NIAID)
Pubblicazioni e link utili
Collegamenti utili
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Inizio studio
Completamento primario (Stimato)
Completamento primario
Completamento dello studio (Stimato)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- 190133
- 19-I-0133
Piano per i dati dei singoli partecipanti (IPD)
Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?
Descrizione del piano IPD
No plan at this time.
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