Publication: Apoptosis, production of MMP9, VEGF, TNF-α and intracellular growth of M. tuberculosis for different genotypes and different pks15/1 genes
Issued Date
2011-09-26
Resource Type
ISSN
22288694
0125877X
0125877X
Other identifier(s)
2-s2.0-80053019908
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Mahidol University
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SCOPUS
Bibliographic Citation
Asian Pacific Journal of Allergy and Immunology. Vol.29, No.3 (2011), 240-251
Suggested Citation
Juthaporn Yorsangsukkamol, Angkana Chaiprasert, Tanapat Palaga, Therdsak Prammananan, Kiatichai Faksri, Prasit Palittapongarnpim, Narapon Prayoonwiwat Apoptosis, production of MMP9, VEGF, TNF-α and intracellular growth of M. tuberculosis for different genotypes and different pks15/1 genes. Asian Pacific Journal of Allergy and Immunology. Vol.29, No.3 (2011), 240-251. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/11992
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Title
Apoptosis, production of MMP9, VEGF, TNF-α and intracellular growth of M. tuberculosis for different genotypes and different pks15/1 genes
Abstract
Background: A previous study of IS6110 RFLP and spoligotyping of M. tuberculosis isolates from 152 Thai patients with tuberculous meningitis revealed a significantly higher percentage (57%) of the Beijing genotype as compared to isolates obtained from pulmonary tuberculosis. We postulated that the M. tuberculosis Beijing genotype is likely t o be more virulent than others. Objectives: Ten M. tuberculosis cerebrospinal fluid (CSF) isolates from five RFLP groups, together with different characteristics of pks15/1, M. tuberculosis H37Rv and M. bovis BCG, were investigated for their virulence in vitro. Methods: In this study, THP-1 cells were used as host cells to determine the intracellular growth and the induction of MMP9, VEGF, TNF-α and apoptosis. Determinations of the cytokine production and apoptosis were based on available commercial kits using ELISA techniques. Results: No significant difference in intracellular multiplication was found between the M. tuberculosis CSF isolates. Three isolates, consisting of 2 Nonthaburi and 1 heterogeneous isolate, were found to stimulate high TNF-α and MMP-9 production during the early infection period.They were isolated from 3 different patients, 2 of whom died with initial stages II and III. This result suggested that there might be an association between TNF-α and MMP-9 production that could account for the specific virulent nature of Nonthaburi strains. VEGF production was determined and c006Fmparable levels were found in all isolates. No significant apoptosis was detected in M. tuberculosis CSF isolates. No significant differences suggesting that the 2 Beijing strains are more virulent than the others were observed. Conclusion: The predominance of the Beijing strains in cases of tuberculous meningitis (TBM) in Thai patients is not a result of their hypervirulence.