Immunohistochemical Evidence for Myofibroblast-like Cells Associated with Liver Injury Induced by Aflatoxin B1 in Rainbow Trout (Oncorhynchus mykiss)

Immunohistochemical Evidence for Myofibroblast-like Cells Associated with Liver Injury Induced by Aflatoxin B1 in Rainbow Trout (Oncorhynchus mykiss)

In mammalian species, profibrogenic cells are activated to become myofibroblasts in response to liver damage. Few studies have examined hepatic myofibroblasts and their role in liver damage in teleosts. The aim of the present study was to investigate the involvement of myofibroblast-like cells in ra...

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Bibliographic Details
Published in:Journal of comparative pathology Vol. 150; no. 2-3; pp. 258 - 265
Main Authors: Arana, S., Alves, V.A.F., Sabino, M., Tabata, Y.A., Nonogaki, S., Zaidan-Dagli, M.-L., Hernandez-Blazquez, F.J.
Format: Journal Article
Language:English
Published: England Elsevier Ltd 01-02-2014
Subjects:
Aflatoxin B1
Animals
Chemical and Drug Induced Liver Injury - metabolism
Chemical and Drug Induced Liver Injury - pathology
fish
hepatocarcinogenesis
Immunohistochemistry
Liver - metabolism
Liver - pathology
liver fibrosis
myofibroblast
Myofibroblasts - metabolism
Myofibroblasts - pathology
Oncorhynchus mykiss
Teleostei
liver fibrosis
hepatocarcinogenesis
myofibroblast
fish
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Summary:In mammalian species, profibrogenic cells are activated to become myofibroblasts in response to liver damage. Few studies have examined hepatic myofibroblasts and their role in liver damage in teleosts. The aim of the present study was to investigate the involvement of myofibroblast-like cells in rainbow trout (Oncorhynchus mykiss) with hepatic damage induced by aflatoxin B1 (AFB1). Histopathological and immunohistochemical analyses characterized alterations in the liver stroma during the carcinogenic process. Anti-human α-smooth muscle actin (SMA) and anti-human desmin primary antibodies were used in immunohistochemistry. Only the anti-SMA reagent labelled cells in trout liver. In the livers of control fish, only smooth muscle in blood vessels and around bile ducts was labelled. In the livers from AFB1-treated fish, SMA-positive cells were present in the stroma surrounding neoplastic lesions and in areas of desmoplastic reaction. These observations indicate that in teleosts, as in mammals, the myofibroblast-like cell is involved in fibrosis associated with liver injury. Chronic liver injury induced in trout by aflatoxin may provide a useful model system for study of the evolution of such mechanisms.
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ISSN:0021-9975
1532-3129
DOI:10.1016/j.jcpa.2013.07.003