Inflammatory response to liver fluke Opisthorchis viverrini in mice depends on host master coregulator MTA1, a marker for parasite-induced cholangiocarcinoma in humans
✍ Scribed by Sujit S. Nair; Anitha Bommana; Suresh B. Pakala; Kazufumi Ohshiro; Amanda J. Lyon; Sutas Suttiprapa; Maria V. Periago; Thewarach Laha; Peter J. Hotez; Jeffrey M. Bethony; Banchob Sripa; Paul J. Brindley; Rakesh Kumar
- Book ID
- 102851093
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 738 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0270-9139
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✦ Synopsis
Based on the recently established role for the master coregulator MTA1 and MTA1-containing nuclear remodeling complexes in oncogenesis and inflammation, we explored the links between parasitism by the carcinogenic liver fluke Opisthorchis viverrini and this coregulator using both an Mta1(-/-) mouse model of infection and a tissue microarray of liver fluke-induced human cholangiocarcinomas (CCAs). Intense foci of inflammation and periductal fibrosis in the liver and kidneys of wild-type Mta1(+/+) mice were evident at 23 days postinfection with O. viverrini. In contrast, little inflammatory response was observed in the same organs of infected Mta1(-/-) mice. Livers of infected Mta1(+/+) mice revealed strong up-regulation of fibrosis-associated markers such as cytokeratins 18 and 19 and annexin 2, as determined both by immunostaining and by reverse-transcription polymerase chain reaction compared with infected Mta1(-/-) mice. CD4 expression was up-regulated by infection in the livers of both experimental groups; however, its levels were several-fold higher in the Mta1(+/+) mice than in infected Mta1(-/-) mice. Mta1(-/-) infected mice also exhibited significantly higher systemic and hepatic levels of host cytokines such as interleukin (IL)-12p70, IL-10, and interferon-γ compared with the levels of these cytokines in the Mta1(+/+) mice, suggesting an essential role of MTA1 in the cross-regulation of the Th1 and Th2 responses, presumably due to chromatin remodeling of the target chromatin genes. Immunohistochemical analysis of ≈ 300 liver tissue cores from confirmed cases of O. viverrini-induced CCA showed that MTA1 expression was elevated in >80% of the specimens.
Conclusion:
These findings suggest that mta1 status plays an important role in conferring an optimal cytokine response in mice following infection with o. viverrini and is a major player in parasite-induced cca in humans.