Acknowledgement
This work was supported by the Thailand Research Fund Senior Scholar (RTA 5680006). BS is a TRF Senior Research Scholar. IJ received a scholarship from the Faculty of Medicine, Khon Kaen University. We thank Professor Yukifuma Nawa for numerous discussions and for his assistance in obtaining the commercial antibody determination kit E-Plate Eiken H. pylori antibody (Eiken Chemical Co., Ltd., Tokyo, Japan). We acknowledge the advice of Professors Ratha-Korn Vilaichone (Thammasat University) and Veerasak Punyapornwithaya (Chiang Mai University). We also thank Manop Sripa (Khon Kaen University) for his technical assistance.
References
- Elkins DB, Haswell-Elkins MR, Mairiang E, Mairiang P, Sithithaworn P, Kaewkes S, Bhudhisawasdi V, Uttaravichien T. A high frequency of hepatobiliary disease and suspected cholangiocarcinoma associated with heavy Opisthorchis viverrini infection in a small community in north-east Thailand. Trans R Soc Trop Med Hyg 1990; 84: 715-719. https://doi.org/10.1016/0035-9203(90)90159-c
- Sripa B, Kaewkes S, Sithithaworn P, Mairiang E, Laha T, Smout M, Pairojkul C, Bhudhisawasdi V, Tesana S, Thinkamrop B, Bethony JM, Loukas A, Brindley PJ. Liver fluke induces cholangiocarcinoma. PLoS Med 2007; 4: e201. https://doi.org/10.1371/journal.pmed.0040201
- Banales JM, Cardinale V, Carpino G, Marzioni M, Andersen JB, Invernizzi P, Lind GE, Folseraas T, Forbes SJ, Fouassier L, Geier A, Calvisi DF, Mertens JC, Trauner M, Benedetti A, Maroni L, Vaquero J, Macias RI, Raggi C, Perugorria MJ, Gaudio E, Boberg KM, Marin JJ, Alvaro D. Cholangiocarcinoma: current knowledge and future perspectives consensus statement from the European Network for the Study of Cholangiocarcinoma (ENS-CCA). Nat Rev Gastroenterol Hepatol 2016; 13: 261-280. https://doi.org/10.1038/nrgastro.2016.51
- Kamsa-Ard S, Luvira V, Suwanrungruang K, Kamsa-Ard S, Luvira V, Santong C, Srisuk T, Pugkhem A, Bhudhisawasdi V, Pairojkul C. Cholangiocarcinoma trends, incidence, and relative survival in Khon Kaen, Thailand from 1989 through 2013: a populationbased cancer registry study. J Epidemiol 2018; 29: 197-204. https://doi.org/10.2188/jea.je20180007
- Rizvi S, Khan SA, Hallemeier CL, Kelley RK, Gores GJ. Cholangiocarcinoma - evolving concepts and therapeutic strategies. Nat Rev Clin Oncol 2018; 15: 95-111. https://doi.org/10.1038/nrclinonc.2017.157
- Nilsson HO, Mulchandani R, Tranberg KG, Stenram U, Wadstrom T. Helicobacter species identified in liver from patients with cholangiocarcinoma and hepatocellular carcinoma. Gastroenterology 2001; 120: 323-324. https://doi.org/10.1053/gast.2001.21382
- Deenonpoe R, Chomvarin C, Pairojkul C, Chamgramol Y, Loukas A, Brindley PJ, Sripa B. The carcinogenic liver fluke Opisthorchis viverrini is a reservoir for species of Helicobacter. Asian Pac J Cancer Prev 2015; 16: 1751-1758. https://doi.org/10.7314/apjcp.2015.16.5.1751
- Deenonpoe R, Mairiang E, Mairiang P, Pairojkul C, Chamgramol Y, Rinaldi G, Loukas A, Brindley PJ, Sripa B. Elevated prevalence of Helicobacter species and virulence factors in opisthorchiasis and associated hepatobiliary disease. Sci Rep 2017; 7: 42744. https://doi.org/10.1038/srep42744
- Dangtakot R, Pinlaor S, Itthitaetrakool U, Chaidee A, Chomvarin C, Sangka A, Wilailuckana C, Pinlaor P. Co-infection of Helicobacter pylori and Opisthorchis viverrini enhances the severity of hepatobiliary abnormalities in hamsters. Infect Immun 2017; 85: e00009-17. https://doi.org/10.1128/iai.00009-17
- Sripa B, Tangkawattana S, Brindley PJ. Update on pathogenesis of opisthorchiasis and cholangiocarcinoma. Adv Parasitol 2018; 102: 97-113. https://doi.org/10.1016/bs.apar.2018.10.001
- Gao L, Michel A, Weck MN, Arndt V, Pawlita M, Brenner H. Helicobacter pylori infection and gastric cancer risk: evaluation of 15 H. pylori proteins determined by novel multiplex serology. Cancer Res 2009; 69: 6164-6170. https://doi.org/10.1158/0008-5472.can-09-0596
- Song H, Michel A, Nyren O, Ekstrom AM, Pawlita M, Ye W. A CagA-independent cluster of antigens related to the risk of noncardia gastric cancer: Associations between Helicobacter pylori antibodies and gastric adenocarcinoma explored by multiplex serology. Int J Cancer 2014; 134: 2942-2950. https://doi.org/10.1002/ijc.28621
- Cai H, Ye F, Michel A, Murphy G, Sasazuki S, Taylor PR, Qiao YL, Park SK, Yoo KY, Jee SH, Cho ER, Kim J, Chen SC, Abnet CC, Tsugane S, Cai Q, Shu XO, Zheng W, Pawlita M, Epplein M. Helicobacter pylori blood biomarker for gastric cancer risk in East Asia. Int J Epidemiol 2016; 45: 774-781. https://doi.org/10.1093/ije/dyw078
- Blase JL, Campbell PT, Gapstur SM, Pawlita M, Michel A, Waterboer T, Teras LR. Prediagnostic Helicobacter pylori antibodies and colorectal cancer risk in an elderly, caucasian population. Helicobacter 2016; 21: 488-492. https://doi.org/10.1111/hel.12305
- Fernandez de Larrea-Baz N, Michel A, Romero B, Perez-Gomez B, Moreno V, Martin V, Dierssen-Sotos T, Jimenez-Moleon JJ, Castilla J, Tardon A, Ruiz I, Peiro R, Tejada A, Chirlaque MD, Butt JA, Olmedo-Requena R, Gomez-Acebo I, Linares P, Boldo E, Castells A, Pawlita M, Castano-Vinyals G, Kogevinas M, de Sanjose S, Pollan M, Del Campo R, Waterboer T, Aragones N. Helicobacter pylori antibody reactivities and colorectal cancer risk in a case-control study in Spain. Front Microbiol 2017; 8: 888. https://doi.org/10.3389/fmicb.2017.00888
- Murphy G, Michel A, Taylor PR, Albanes D, Weinstein SJ, Virtamo J, Parisi D, Snyder K, Butt J, McGlynn KA, Koshiol J, Pawlita M, Lai GY, Abnet CC, Dawsey SM, Freedman ND. Association of seropositivity to Helicobacter species and biliary tract cancer in the ATBC study. Hepatology 2014; 60: 1963-1971. https://doi.org/10.1002/hep.27193
- Sripa B, Mairiang E, Thinkhamrop B, Laha T, Kaewkes S, Sithithaworn P, Tessana S, Loukas A, Brindley PJ, Bethony JM. Advanced periductal fibrosis from infection with the carcinogenic human liver fluke Opisthorchis viverrini correlates with elevated levels of interleukin-6. Hepatology 2009; 50: 1273-1281. https://doi.org/10.1002/hep.23134
- RStudio Team. RStudio: Integrated Development for R. [Internet]; [cited 2018 Sept 17]. Available from: https://www.rstudio.com/
- The R Core Team. Package "stats." R: A language and environ- ment for statistical computing R Foundation for Statistical Computing [Internet]; 2001 [cited 2018 Aug 10]; Available from: https://www.rdocumentation.org/packages/stats/versions/3.5.1
- Hijmans RJ, van Etter J, Sumner M, Cheng J, Baston D, Bevan A, Bivand R, Busetto L, Canty M, Fasoli B, Forrest D, Ghosh A, Golicher D, Gray J, Greenberg JA, Hiemstra P, Hingee K, Institute for Mathematics Applied Geosciences, Karney C, Mattiuzzi M, Mosher S, Naimi B, Nowosad J, Pebesma E, Lamigueiro OP, Racine EB, Rowlingson B, Shortridge A, Venables B, Wueest R. Package "raster." [Internet]; Available from: https://cran.r-project.org/web/packages/raster/raster.pdf
- Wickham H, Chang W, Henry L. Package 'ggplot2.' R: A language and environment for statistical computing R Foundation for Statistical Computing [Internet]; Available from: https://cran.r-project.org/web/packages/ggplot2/index.html
- Ripley B, Venables W. Package "nnet." R: A language and environment for statistical computing R Foundation for Statistical Computing [Internet]; Available from: http://www.stats.ox.ac.uk/pub/MASS4/
- Jungblut PR, Bumann D, Haas G, Zimny-Arndt U, Holland P, Lamer S, Siejak F, Aebischer A, Meyer TF. Comparative proteome analysis of Helicobacter pylori. Mol Microbiol 2000; 36: 710-725. https://doi.org/10.1046/j.1365-2958.2000.01896.x
- Kamiya S, Yamaguchi H, Osaki T, Taguchi H. A virulence factor of Helicobacter pylori: role of heat shock protein in mucosal inflammation after H. pylori infection. J Clin Gastroenterol 1998; 27 (suppl): 35-39. https://doi.org/10.1097/00004836-199800001-00007
- Takenaka R, Yokota K, Ayada K, Mizuno M, Zhao Y, Fujinami Y, Lin SN, Toyokawa T, Okada H, Shiratori Y, Oguma K. Helicobacter pylori heat-shock protein 60 induces inflammatory responses through the Toll-like receptor-triggered pathway in cultured human gastric epithelial cells. Microbiology 2004; 150: 3913-3922. https://doi.org/10.1099/mic.0.27527-0
- Ferreira RM, Pinto-Ribeiro I, Wen X, Marcos-Pinto R, Dinis-Ribeiro M, Carneiro F, Figueiredo C. Helicobacter pylori cagA promoter region sequences influence CagA expression and interleukin 8 secretion. J Infect Dis 2016; 213: 669-673. https://doi.org/10.1093/infdis/jiv467
- Ahire D, Alston T, Raffaniello R. Variations in the multimerization region of the Helicobacter pylori cytotoxin CagA affect virulence. Oncol Lett 2017; 13: 1444-1450. https://doi.org/10.3892/ol.2017.5562
- Jang S, Su H, Blum FC, Bae S, Choi YH, Kim A, Hong YA, Kim J, Kim JH, Gunawardhana N, Jeon YE, Yoo YJ, Merrell DS, Ge L, Cha JH. Dynamic expansion and contraction of cagA copy number in Helicobacter pylori impact development of gastric disease. mBio 2017; 8: e01779-16. https://doi.org/10.1128/mbio.01779-16