Biologic Basis Of Increased Susceptibility Of Smokers To Pulmonary Infection With Mycobacterium Tuberculosis
23. mai 2017 oppdatert av: Weill Medical College of Cornell University
Identify a biologic (molecular) basis for the increased susceptibility of cigarette smokers to pulmonary TB (Mtb) by testing the hypothesis that smoking reprograms AM polarization towards a distinct phenotype associated with impaired host defense function against Mtb and that normalization of that phenotype via therapeutic modulation of the Alveolar Macrophage (AM) polarization or smoking cessation can restore the anti-Mtb host defense function of AM.
Studieoversikt
Status
Tilbaketrukket
Detaljert beskrivelse
Samples from Non-Smokers with TB, Smokers with TB and Smokers with COPD and TB will be collected in Qatar under JIRB 14-00055.
All subjects will be undergoing a clinical bronchoscopy as part of their disease evaluation and will be asked to give additional samples for research.
All "in vivo" processing of specimens from subjects with TB will be performed in Qatar.
Mycobacterium tuberculosis infection (Mtb) continues to have a detrimental impact of public health worldwide.
Based on the epidemiological evidence linking smoking, COPD and Mtb, and our preliminary data we hypothesize that smoking reprograms Alveolar Macrophages (AM) polarization towards a distinct phenotype associated with impaired host defense function against Myobacterium tuberculosis (Mtb) and that normalization of that phenotype via therapeutic modulation of the Alveolar Macrophages (AM) polarization or smoking cessation can restore the anti-Mtb host defense function of AM.
Studietype
Observasjonsmessig
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
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Doha, Qatar
- Hamad Medical Corporation
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Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
18 år til 60 år (Voksen)
Tar imot friske frivillige
Ja
Kjønn som er kvalifisert for studier
Alle
Prøvetakingsmetode
Ikke-sannsynlighetsprøve
Studiepopulasjon
Recruitment will be from the referral base of the responsible investigator and other physicians, and review of admissions and hospital database.
Patients, who may qualify for this study, will be identified by chart review, physician referral, and recruited by study investigators.
The source of potential subjects will be the population of potential subjects with TB (smokers or non smokers), and with both TB and COPD, as defined before.
Accrual will be random with no bias as to gender or racial/ethnic group.
Beskrivelse
Smokers and Non-smokers with TB
Inclusion Criteria:
- Must provide informed consent
- Current smokers and non-smokers
- Undergoing clinical bronchoscopy as required by their doctor for evaluation of their disease
- Diagnosis of pulmonary tuberculosis without extra-pulmonary TB, confirmed by at least one of the following:
- Symptoms consistent with TB
- Chest xray and or chest CT with TB
- Positive PPD test
- Positive sputum test
Exclusion Criteria:
- Females who are pregnant or nursing
- History of allergies to xylocaine, lidocaine, versed, valium, atropine, isoproterenol, terbutaline, aminophylline, or any local anesthetic
Smokers with TB and COPD
Inclusion Criteria:
- Must provide informed consent
- Current smokers with COPD
- Undergoing clinical bronchoscopy as required by their doctor for evaluation of their disease
- Diagnosis of pulmonary tuberculosis without extra-pulmonary TB, confirmed bu at least one of the following:
- Symptoms consistent with TB
- Chest xray and or chest CT consistent with TB
- Positive PPD test
- Positive sputum test
Exclusion Criteria:
- Non-smokers
- Females who are pregnant or nursing
- History of allergies to xylocaine, lidocaine, versed, valium, atropine, isoproterenol, terbutaline, aminophylline, or any local anesthetic
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
Kohorter og intervensjoner
Gruppe / Kohort |
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Individuals with TB
Diagnosis of pulmonary tuberculosis without extra-pulmonary TB, confirmed by at least one of the following:
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Smokers
Active smoker as evidenced by self report and urine nicotine >30 ng/mL and urine cotinine >50 ng/mL Diagnosis of pulmonary tuberculosis without extra-pulmonary TB, confirmed by at least one of the following:
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Non-smokers
Never smokers is defined as someone who has smoked < 100 cigarettes per lifetime and whose urine nicotine <2 ng/mL and urine cotinine <5 ng/mL, at entry into the study Diagnosis of pulmonary tuberculosis without extra-pulmonary TB, confirmed by at least one of the following:
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Individuals with COPD
All study subjects should meet the "Lung Disease" protocol criteria for having COPD may be of any stage (GOLD I - IV), be ambulatory and have no evidence of respiratory failure Diagnosis of pulmonary tuberculosis without extra-pulmonary TB, confirmed by at least one of the following:
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Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
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Alveolar Macrophage
Tidsramme: 1 week
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Changes in alveolar macrophage
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1 week
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Samarbeidspartnere og etterforskere
Det er her du vil finne personer og organisasjoner som er involvert i denne studien.
Etterforskere
- Hovedetterforsker: Ronald Crystal, MD, Weill Medical College of Cornell University
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart
1. januar 2014
Primær fullføring (Forventet)
1. oktober 2016
Studiet fullført (Forventet)
1. oktober 2016
Datoer for studieregistrering
Først innsendt
22. november 2013
Først innsendt som oppfylte QC-kriteriene
19. desember 2013
Først lagt ut (Anslag)
27. desember 2013
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
24. mai 2017
Siste oppdatering sendt inn som oppfylte QC-kriteriene
23. mai 2017
Sist bekreftet
1. mai 2017
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 14-00055 [JIRB]
- NPRP 5-400-3-107 (Annen identifikator: Qatar National Research Fund)
- 11262/11 (Annen identifikator: HMC IRB)
Plan for individuelle deltakerdata (IPD)
Planlegger du å dele individuelle deltakerdata (IPD)?
JA
IPD-planbeskrivelse
All results of the proposed studies will be published in international peer-reviewed scientific journals, presented at meetings in Qatar, the regional and international conferences, and disseminated through the local Qatari media, seminars and lectures for high school and college students.
The original data will be available to interested investigators using the conventional standards of biomedical science.
Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .