Association of Antigen-Stimulated Release of Tumor Necrosis Factor-Alpha in Whole Blood with Response to Chemotherapy in Patients with Pulmonary Multidrug-Resistant Tuberculosis
| Autor: | Laura E. Via, Clifton E. Barry, Seung Kyu Park, Seok Yong Eum, Sang Nae Cho, Jason J. LeBlanc, Jin Hong Min, Hyun Kyung Kwak, Ye Jin Lee, Min Sun Hong, Ji Hye Kong, Soo Hee Hwang |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Pulmonary and Respiratory Medicine
Adult Male Tuberculosis medicine.medical_treatment Clinical Investigations Antitubercular Agents Drug resistance Sputum culture Mycobacterium tuberculosis Interferon-gamma Young Adult Tuberculosis Multidrug-Resistant medicine Humans Whole blood Aged Aged 80 and over Chemotherapy medicine.diagnostic_test biology business.industry Tumor Necrosis Factor-alpha Sputum Middle Aged biology.organism_classification medicine.disease Interleukin-12 Interleukin-10 Cytokine Case-Control Studies Immunology Female medicine.symptom business Biomarkers |
| Popis: | Background: We have previously reported that TNF-α levels correlate to total mycobacterial burden in tuberculosis (TB) patients. Objective: To characterize the dynamics of cytokine responses in TB patients during chemotherapy to identify potential surrogate markers for effective treatment. Methods: Following induction by culture filtrate proteins in whole blood, production patterns of TNF-α, IL-10, IFN-γ and IL-12 were measured in 23 non-multidrug-resistant (MDR)-TB and 16 MDR-TB patients and in 31 healthy controls. Rates of mycobacterial clearance from the sputum were then measured and compared. Results: Prior to the initiation of chemotherapy, TNF-α and IL-10 levels were significantly higher in TB patients than in healthy controls while IFN-γ and IL-12 levels were similar. During chemotherapy, the levels of all 4 cytokines increased. We evaluated these responses separately in patients that did and did not clear their sputum culture at 2 and 6 months. At 2 months, decreases in both IFN-γ and IL-12 correlated strongly with a successful early response, while after 6 months of therapy, when half (7/14) of MDR-TB patients were still sputum culture positive, downregulation of TNF-α was uniquely correlated with sputum conversion between the groups. Conclusion: Our findings suggest the possibility that the regulation of TNF-α production in whole blood may be a more specific indicator of sputum conversion at 6 months than IFN-γ, IL-12 or IL-10 in MDR-TB patients. |
| Databáze: | OpenAIRE |
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