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Effect of Clonorchis sinensis Excretory-secretory Product on the Cultured SD Rat Bile Duct Fibroblast  

Kwon, Jung-Nam (Department of Parasitology, Korea University College of Medicine)
Min, Byoung-Hoon (Department of Parasitology, Korea University College of Medicine)
Lee, Haeng-Sook (Department of Parasitology, Korea University College of Medicine)
Kim, Soo-Jin (Department of Life Science, College of Natural Science, Hallym University)
Joo, Kyoung-Hwan (Department of Parasitology, Korea University College of Medicine)
Publication Information
Applied Microscopy / v.39, no.2, 2009 , pp. 117-124 More about this Journal
Abstract
Clonorchis sinensis is the most important widely distributed parasite of the human bile duct in East Asia and the most prevalent parasitic helminth in Korea. The prevalence rate of human clonorchiasis has remained at about 2.9% in Korea. C. sinensis induces dilatation of the duct, hyperplasia of the mucosa, metaplasia or neoplasia of the mucosal epithelium, periductal inflammation and fibrosis, and thickening of the ductal wall. Fibroblast are the most common cells in connective tissue and are responsible for the synthesis of extracellular matrix components. The fibrosis associated with chronic inflammation and injury may also contribute to cholangiocarcinoma pathogenesis, particularly through an increase in extracellular matrix components, which participate in the regulation of bile duct differentiation during development. In this study, ultrastructural changes, the distribution of lectin receptors and actin protein in cultured SD rat bile duct fibroblast after infection of C. sinensis were observed. Experimental group had been divided into four groups: normal bile duct fibroblast cultured in basal media (G1); C. sinensis infected bile duct fibroblast cultured in basal media (G2); normal bile duct fibroblast cultured in basal media containing excretory-secretory product (ESP) (G1-1); C. sinensis infected bile duct fibroblast cultured in basal media containing ESP (G2-1). Overall, once a host is infected by C. sinensis, it affects the host to the extent that sialic acid of ductal fibroblast is increased. Number of cytoplasmic process of SD rat bile duct fibroblast was increased. Actin protein and sialic acid were located in cell surface. Fibroblast induced by C. sinensis was not recovered to normal fibroblast. The cytoplasm bulk and cytoplasmic process were increased whereas the growth rate of the fibroblast of infected SD rat was reduced rather than that of normal fibroblast. In result, it inhibits fibroblast proliferation and increases actin protein on fibroblast cytoplasm, and so causes fibroblast metamorphosis and cellular mutation.
Keywords
Clonorchis sinensis; Excretory-secretory product (ESP); Fibroblast;
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