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Erschienen in: Annals of Surgical Oncology 3/2015

01.12.2015 | Translational Research and Biomarkers

Reduced Expression of Adherens Junctions Associated Protein 1 Predicts Recurrence of Hepatocellular Carcinoma After Curative Hepatectomy

verfasst von: Kazuhiro Ezaka, MD, Mitsuro Kanda, MD, PhD, Hiroyuki Sugimoto, MD, PhD, Dai Shimizu, MD, Hisaharu Oya, MD, PhD, Shuji Nomoto, MD, PhD, Satoshi Sueoka, MD, Yuri Tanaka, MD, Hideki Takami, MD, PhD, Ryoji Hashimoto, MD, Yukiyasu Okamura, MD, PhD, Suguru Yamada, MD, PhD, Tsutomu Fujii, MD, PhD, Goro Nakayama, MD, PhD, Masahiko Koike, MD, PhD, Michitaka Fujiwara, MD, PhD, Yasuhiro Kodera, MD, PhD

Erschienen in: Annals of Surgical Oncology | Sonderheft 3/2015

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Abstract

Background

Hepatocellular carcinoma (HCC) frequently recurs after curative resection. Therefore, the availability of sensitive biomarkers for progression and recurrence is essential for managing patients’ clinical course. Adherens junctions associated protein 1 (AJAP1) may serve this purpose, because it mediates activities of tumor cells.

Methods

AJAP1 mRNA levels and those of genes encoding potential interacting proteins, such as SRC in HCC cell lines, and 144 pairs of resected liver tissues were determined as well as the methylation status of the AJAP1 promoter and copy number changes at AJAP1 locus. The expression pattern of AJAP1 protein was evaluated using immunohistochemistry.

Results

AJAP1 mRNA levels varied among nine HCC cell lines, and AJAP1 expression was reactivated after demethylation of its promoter. AJAP1 mRNA levels correlated inversely with those of SRC in HCC cell lines and tissues. AJAP1 mRNA levels were suppressed in HCC tissues. The expression pattern of AJAP1 correlated significantly with that of AJAP1 mRNA. Low levels of AJAP1 mRNA in patients with HCC associated significantly with elevated levels of tumor markers, larger tumor size, serosal infiltration, vascular invasion, hypermethylation of the AJAP1 promoter, and copy number loss at AJAP1 locus. Patients with low levels of AJAP1 expression were more likely to experience shorter disease-free survival (DFS), and multivariate analysis identified low AJAP1 expression as an independent factor for predicting DFS.

Conclusions

AJAP1 may function as a key regulatory molecule associated with the recurrence of HCC. Hypermethylation of the AJAP1 promoter is a key regulatory mechanism controlling AJAP1 expression.
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Metadaten
Titel
Reduced Expression of Adherens Junctions Associated Protein 1 Predicts Recurrence of Hepatocellular Carcinoma After Curative Hepatectomy
verfasst von
Kazuhiro Ezaka, MD
Mitsuro Kanda, MD, PhD
Hiroyuki Sugimoto, MD, PhD
Dai Shimizu, MD
Hisaharu Oya, MD, PhD
Shuji Nomoto, MD, PhD
Satoshi Sueoka, MD
Yuri Tanaka, MD
Hideki Takami, MD, PhD
Ryoji Hashimoto, MD
Yukiyasu Okamura, MD, PhD
Suguru Yamada, MD, PhD
Tsutomu Fujii, MD, PhD
Goro Nakayama, MD, PhD
Masahiko Koike, MD, PhD
Michitaka Fujiwara, MD, PhD
Yasuhiro Kodera, MD, PhD
Publikationsdatum
01.12.2015
Verlag
Springer US
Erschienen in
Annals of Surgical Oncology / Ausgabe Sonderheft 3/2015
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-015-4695-9

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