The Role of Apoptosis Associated Markers in Pathogenesis of Pulmonary Tuberculosis

To Compare the Serum Apoptosis-associated Markers Between Patients With Active TB and Patients With LTBI Clinical Trial

Official title:

The Role of Apoptosis Associated Markers in Pathogenesis of Pulmonary Tuberculosis

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT01676155
• Other study ID #: 20110822RC
• Status: Recruiting
• Phase: N/A
• First received: August 28, 2012
• Last updated: August 28, 2012
• Start date: September 2011

Study information

• Verified date: June 2012
• Source: National Taiwan University Hospital
• Contact: Chin-Chung Shu, MD
• Phone: 886-972653087
• Email: chinchungshu[@]ntu.edu.tw
• Is FDA regulated: No
• Health authority: Taiwan: Department of Health
• Study type: Observational

Clinical Trial Summary

To compare the serum apoptosis-associated markers between patients with active TB and patients with LTBI To evaluate the efficiency of apoptosis-associated markers to differentiate potential of active TB from LTBI

Description:

Background: Tuberculosis (TB) remains the most important infectious disease worldwide. For controlling TB, the important strategy includes not only adequate anti-tuberculous treatment but also well control of latent TB infection (LTBI). Latent TB infection (LTBI) has 10% of reactivation or more in patients with immuno-compromised disorder. Although LTBI can be detected by interferon-gamma release assay (IGRA) or tuberculin skin test, how to predict who will become active TB from LTBI is still unclear but important. In overall prophylactic treatment for LTBI, the lengthy duration and possible serious side effect too scared to general application especially 90% of population who may not get illness. Therefore, to recognize who develop active TB from LTBI is important for targeted prophylactic therapy. The good marker is not discovered at present. When TB bacilli arrive our lung, macrohage is the first line defense and necrosis rather than apoptosis is the dominant form of cell death, which affords a protective milieu for M. tuberculosis. Though the apoptosis is suppressed in TB, the apoptosis-associated markers have rarely been investigated in human LTBI vs. active TB. We set up a cohort study to detect active TB developing from LTBI and first-step conduct a case control study to compare apoptosis markers between LTBI and active TB for evaluating the apoptosis markers in discriminating TB infection status. The significant markers should be verified in further cohort study of LTBI patients.

Hypothesis: The apoptosis-associated markers, including Fas ligand, Decoy-receptor 3, Lipoxin, and prostaglandin E2, are discriminative in patients with active TB from those with LTBI and thus might predict the potential of being active TB from LTBI.

Study Aims:

To compare the serum apoptosis-associated markers between patients with active TB and patients with LTBI To evaluate the efficiency of apoptosis-associated markers to differentiate potential of active TB from LTBI Methods: We prospectively enroll patients with active TB (n=100) and LTBI (n=100), defined by IGRA. Blood sample would be collected before they received definite treatment after yielding informed consent. We will examine serum apoptosis-associated markers including Fas ligand, Decoy-receptor 3, Lipoxin, and prostaglandin E2, and other cytokines and chemokines in serum sample and supernatant from T-cell after TB antigen stimulation. Their clinical characteristics will be recorded. We compare the laboratory and clinical data between the two groups and analyze the efficacy of diagnostic help from these markers.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 400
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 20 Years and older

Eligibility

Inclusion Criteria:

• Age = 20 years

• Latent TB group: family contacts who have positive response in IGRA (by QuantiFeron-TB Gold-in-Tube, which is described detail in Part C) and have no signs of active TB.

• Active TB group: patients with pulmonary tuberculosis diagnosed by positive respiratory culture.

Exclusion Criteria:

• Age younger than 20 years.

• Patients who have pregnancy.

• Patients who have acquired immunodeficiency syndrome

• Patients who have bleeding tendency which can not tolerate venous puncture such as hemophilia, thrombocytopenia.

Study Design

Observational Model: Case Control, Time Perspective: Prospective

Related Conditions & MeSH terms

• To Compare the Serum Apoptosis-associated Markers Between Patients With Active TB and Patients With LTBI
• To Evaluate the Efficiency of Apoptosis-associated Markers to Differentiate Potential of Active TB From LTBI
• Tuberculosis
• Tuberculosis, Pulmonary

Locations

Country	Name	City	State
Taiwan	National Taiwan University Hospital	Taipei

Sponsors (1)

Lead Sponsor	Collaborator
National Taiwan University Hospital

Country where clinical trial is conducted

Taiwan, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	getting active tuberculosis		2 year	No
Secondary	mortality		2 years	No