Infection with the food-borne liver fluke parasites Opisthorchis viverrini and Clonorchis sinensis is a strong risk factor for cholangiocarcinoma (CCA), bile duct cancer, in Thailand, Laos and other locations in East Asia where infection is endemic. As determined by the World Health Organization's International Agency for Research on Cancer, no stronger link exists between human malignancy and a eukaryotic pathogen than that of CCA and liver fluke infection. CCA usually presents late, is a challenge for diagnosis, metastasizes readily and has high mortality - features highlighting the necessity to understand why and how infection with a food- borne parasite leads to a devastating liver cancer. The transformation from chronic infection with O. viverrini to CCA is multi-factorial, but one importan factor appears to be secretion into the bile ducts of parasite proteins with mitogenic properties, driving local proliferation of biliary and hepatic cells and creating a tumorigenic environment. We have identified a homologue of human granulin, a potent growth factor involved in cell proliferation and wound healing, in the excretory/secretory (ES) products of the parasite. O. viverrini granulin, termed Ov-GRN-1, is widely expressed in fluke tissues, including gut and tegument. Furthermore, Ov-GRN-1 locates in situ to the surface of biliary epithelial cells of hamsters experimentally infected with O. viverrini. Recombinant Ov-GRN-1 stimulates proliferation of murine fibroblasts and human CCA cell lines at nanomolar concentrations that can be inhibited by MAPK kinase inhibitors. Antibodies to Ov-GRN-1 inhibited the ability of O. viverrini ES products to induce proliferation of mammalian cell lines in vitro, indicating that Ov-GRN-1 is the major growth factor present in O. viverrini ES. This was the first report of a secreted growth factor from a parasitic worm that induces proliferation of host cells. Significantly, these new findings support a role for this fluke protein in establishment of a tumorigenic environment that may ultimately manifest as CCA. Here we plan to test this hypothesis with a particular emphasis on the role of Ov-GRN-1 in cell cycle progression and wound repair. We propose also to characterize transcriptional and translational responses of cholangiocytes and CCA cell lines to Ov-GRN-1 using proteomic and genomic microarray approaches to understand signaling and other pathways by which liver fluke granulin drives host cell proliferation. In addition, we propose to use gene silencing and vaccination of hamsters to determine whether Ov-GRN-1 is the major, or even sole, growth factor secreted by the parasite. These studies will determine whether Ov-GRN-1 is the Achilles'heel of this parasite that could be exploited as an anti-fluke and indeed anti-cancer vaccine.

Public Health Relevance

Long term infection with liver fluke - a food-borne parasitic worm - leads to cholangiocarcinoma (CCA), a form of liver cancer with a dismal prognosis. We have identified a protein from these parasites that may cause this cancer. Here we propose to investigate the role of this parasite protein (termed granulin) in cancer, which may lead to new treatments and control for fluke infection and CCA.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
3R01CA164719-02S1
Application #
8716242
Study Section
Pathogenic Eukaryotes Study Section (PTHE)
Program Officer
Ogunbiyi, Peter
Project Start
2012-09-21
Project End
2017-07-31
Budget Start
2013-08-01
Budget End
2014-07-31
Support Year
2
Fiscal Year
2013
Total Cost
$75,067
Indirect Cost
$27,706
Name
George Washington University
Department
Microbiology/Immun/Virology
Type
Schools of Medicine
DUNS #
043990498
City
Washington
State
DC
Country
United States
Zip Code
20052
Gouveia, Maria João; Brindley, Paul J; Gärtner, Fátima et al. (2018) Drug Repurposing for Schistosomiasis: Combinations of Drugs or Biomolecules. Pharmaceuticals (Basel) 11:
van Tong, Hoang; Brindley, Paul J; Meyer, Christian G et al. (2017) Parasite Infection, Carcinogenesis and Human Malignancy. EBioMedicine 15:12-23
Sripa, Banchob; Deenonpoe, Raksawan; Brindley, Paul J (2017) Co-infections with liver fluke and Helicobacter species: A paradigm change in pathogenesis of opisthorchiasis and cholangiocarcinoma? Parasitol Int 66:383-389
Bansal, Paramjit S; Smout, Michael J; Wilson, David et al. (2017) Development of a Potent Wound Healing Agent Based on the Liver Fluke Granulin Structural Fold. J Med Chem 60:4258-4266
Vale, Nuno; Gouveia, Maria João; Rinaldi, Gabriel et al. (2017) Praziquantel for Schistosomiasis: Single-Drug Metabolism Revisited, Mode of Action, and Resistance. Antimicrob Agents Chemother 61:
Saltykova, Irina V; Ogorodova, Ludmilla M; Ivanov, Vladimir V et al. (2017) Carbonyl stress phenomena during chronic infection with Opisthorchis felineus. Parasitol Int 66:453-457
Surapaitoon, Arpa; Suttiprapa, Sutas; Mairiang, Eimorn et al. (2017) Subsets of Inflammatory Cytokine Gene Polymorphisms are Associated with Risk of Carcinogenic Liver Fluke Opisthorchis viverrini-Associated Advanced Periductal Fibrosis and Cholangiocarcinoma. Korean J Parasitol 55:295-304
Chaiyadet, Sujittra; Krueajampa, Watchara; Hipkaeo, Wiphawi et al. (2017) Suppression of mRNAs encoding CD63 family tetraspanins from the carcinogenic liver fluke Opisthorchis viverrini results in distinct tegument phenotypes. Sci Rep 7:14342
Deenonpoe, Raksawan; Mairiang, Eimorn; Mairiang, Pisaln et al. (2017) Elevated prevalence of Helicobacter species and virulence factors in opisthorchiasis and associated hepatobiliary disease. Sci Rep 7:42744
Saltykova, Irina V; Petrov, Vjacheslav A; Logacheva, Maria D et al. (2016) Biliary Microbiota, Gallstone Disease and Infection with Opisthorchis felineus. PLoS Negl Trop Dis 10:e0004809

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