Fractalkine and CX3CR1 are involved in the recruitment of intraepithelial lymphocytes of intrahepatic bile ducts

Kumiko Isse, Kenichi Harada, Yoh Zen, Takashi Kamihira, Shinji Shimoda, Mine Harada, Yasuni Nakanuma

Research output: Contribution to journalArticle

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Abstract

Fractalkine is a chemokine with both chemoattractant and cell-adhesive functions, and in the intestine it is involved with its receptor CX3CR1 in the chemoattraction and recruitment of intraepithelial lymphocytes. We examined the pathophysiological roles of fractalkine and CX3CR1 in normal and diseased bile ducts. Expression of fractalkine and CX3CR1 were examined in liver tissues from patients with primary biliary cirrhosis (17 cases) and controls (9 cases of primary sclerosing cholangitis, 10 cases of extrahepatic biliary obstruction, 20 cases of chronic viral hepatitis C, and 18 cases of histologically normal livers). Expression of fractalkine in biliary epithelial cells (BECs) in response to cytokine treatments was examined using a human cholangiocarcinoma cell line (HuCC-T1) and human intrahepatic BEC line. The chemotaxis of CX3CR1-expressing monocytes (THP-1) toward fractalkine was assayed using chemotaxis chambers. Fractalkine messenger RNA/protein were expressed on BECs of normal and diseased bile ducts, and their expression was upregulated in injured bile ducts of primary biliary cirrhosis. CX3CR1 was expressed on infiltrating mononuclear cells in portal tracts and on CD3+, CD4+, and CD8+ intraepithelial lymphocytes of injured bile ducts in primary biliary cirrhosis. Fractalkine messenger RNA expression was upregulated in two cultured BECs on treatment with lipopolysaccharide and Th1-cytokines (interleukin 1β, interferon gamma, and tumor necrosis factor α). THP-1 cells showed chemotaxis toward fractalkine secreted by cultured cells. In conclusion, Th1-cytokine predominance and lipopolysaccharide in the microenvironment of injured bile ducts resulting from primary biliary cirrhosis induce the upregulation of fractalkine expression in BECs, followed by the chemoattraction of CX3CR1-expressing mononuclear cells, including CD4 + and CD8+ T cells, and their adhesion to BECs and the accumulation of biliary intraepithelial lymphocytes.

Original languageEnglish
Pages (from-to)506-516
Number of pages11
JournalHepatology
Volume41
Issue number3
DOIs
Publication statusPublished - Mar 1 2005

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Chemokine CX3CL1
Intrahepatic Bile Ducts
Lymphocytes
Biliary Liver Cirrhosis
Epithelial Cells
Chemotaxis
Bile Duct Diseases
Bile Ducts
Cytokines
Lipopolysaccharides
Cell Line
Sclerosing Cholangitis
Messenger RNA
Cholangiocarcinoma
Liver
Chemotactic Factors
Chronic Hepatitis C
Interleukin-1
Chemokines
Cell Adhesion

All Science Journal Classification (ASJC) codes

  • Hepatology

Cite this

Fractalkine and CX3CR1 are involved in the recruitment of intraepithelial lymphocytes of intrahepatic bile ducts. / Isse, Kumiko; Harada, Kenichi; Zen, Yoh; Kamihira, Takashi; Shimoda, Shinji; Harada, Mine; Nakanuma, Yasuni.

In: Hepatology, Vol. 41, No. 3, 01.03.2005, p. 506-516.

Research output: Contribution to journalArticle

Isse, Kumiko ; Harada, Kenichi ; Zen, Yoh ; Kamihira, Takashi ; Shimoda, Shinji ; Harada, Mine ; Nakanuma, Yasuni. / Fractalkine and CX3CR1 are involved in the recruitment of intraepithelial lymphocytes of intrahepatic bile ducts. In: Hepatology. 2005 ; Vol. 41, No. 3. pp. 506-516.
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