Volume 118, Issue 4 pp. 664-674
RESEARCH ARTICLE

CD90 expression in human intrahepatic cholangiocarcinoma is associated with lymph node metastasis and poor prognosis

Ryoya Yamaoka MD

Ryoya Yamaoka MD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Takamichi Ishii MD, PhD

Corresponding Author

Takamichi Ishii MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

Correspondence Takamichi Ishii, MD, PhD, Department of Surgery, Graduate School of Medicine, Kyoto University, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan. Email: [email protected]

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Takayuki Kawai MD, PhD

Takayuki Kawai MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Kentaro Yasuchika MD, PhD

Kentaro Yasuchika MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Yuya Miyauchi MD

Yuya Miyauchi MD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Hidenobu Kojima MD

Hidenobu Kojima MD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Hokahiro Katayama MD, PhD

Hokahiro Katayama MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Satoshi Ogiso MD, PhD

Satoshi Ogiso MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Ken Fukumitsu MD, PhD

Ken Fukumitsu MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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Shinji Uemoto MD, PhD

Shinji Uemoto MD, PhD

Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan

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First published: 09 September 2018
Citations: 14

Abstract

Background and Objectives

Intrahepatic cholangiocarcinoma (ICC) is the second most common primary liver cancer. However, its prognosis remains poor. Expression of cluster of differentiation 90 (CD90) has been identified as an indicator of poor prognosis in many cancers. Here, we examined the importance of CD90 expression in ICC.

Methods

We performed immunohistological assays for CD90 in human ICC surgical specimens and assessed its relationship with clinicopathological findings and prognosis. Moreover, we analyzed the characteristics of CD90+/− cells, mainly with respect to metastatic potential, using human ICC cell lines.

Results

CD90 expression was significantly associated with lymph node metastasis and was revealed to be an independent prognostic factor. The CD90+ cells present in ICC specimens did not appear to be cancer-associated fibroblasts, as they did not express α-smooth muscle actin. In vitro, CD90 + cells exhibited greater migratory ability and higher expression of epithelial-mesenchymal transition (EMT)–related genes, including CXCR4 and MMP7, than CD90 cells. Wnt/β-catenin signaling pathway activation was also heightened in CD90+ cells. In such cells, EMT appeared to be induced by CXCR4 and MMP7 expression through activation of Wnt/β-catenin signaling.

Conclusion

CD90+ cells demonstrate high metastatic potential owing to Wnt/β-catenin signaling activation and are associated with poor prognosis in ICC.

CONFLICTS OF INTEREST

All authors declare that there are no conflicts of interest.

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