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Erschienen in: Annals of Surgical Oncology 13/2011

01.12.2011 | Translational Research and Biomarkers

Decreased Expression of RASSF6 Is a Novel Independent Prognostic Marker of a Worse Outcome in Gastric Cancer Patients after Curative Surgery

verfasst von: Yugang Wen, MD, PhD, Quan Wang, MD, PhD, Chongzhi Zhou, MD, PhD, Dongwang Yan, MD, PhD, Guoqiang Qiu, MD, Chun Yang, MD, PhD, Huamei Tang, MD, Zhihai Peng, MD, PhD

Erschienen in: Annals of Surgical Oncology | Ausgabe 13/2011

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Abstract

Background

Our previous study observed that the expression of RASSF6, a member of the Ras-association domain family, was down-regulated in gastric cancer cells. The present study further investigated the clinical significance of RASSF6 in gastric cancer.

Methods

Using real-time PCR, Western blot analysis, tissue microarray (TMA), and immunohistochemical staining, we evaluated RASSF6 mRNA and protein levels in tumor tissues and in the paired adjacent normal mucosa from patients with gastric cancers at different stages.

Results

RASSF6 mRNA and protein levels were decreased in gastric cancer tissues compared with the adjacent normal mucosa. Immunohistochemical detection of RASSF6 in a TMA that contained 264 paired specimens showed that a decreased cytoplasmic RASSF6 expression was significantly associated with the extent of cancer invasion, lymph node metastasis, distant metastasis, tumor histological grade, advanced clinical stage, and Ki-67 proliferative index. Moreover, RASSF6 expression in metastatic lymph nodes was lower than in the paired primary tumors. Patients with RASSF6-negative tumors had extremely higher disease recurrence rates and poorer survival than patients with RASSF6-positive tumors even after radical surgery. Stratification analysis revealed RASSF6 as an independent predictor for tumor recurrence in patients with gastric cancers irrespective of tumor stage.

Conclusions

RASSF6 might contribute to the progression of gastric carcinogenesis and may function as a novel independent prognostic marker for the prediction of the recurrence of cancer in patients after curative operations.
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Metadaten
Titel
Decreased Expression of RASSF6 Is a Novel Independent Prognostic Marker of a Worse Outcome in Gastric Cancer Patients after Curative Surgery
verfasst von
Yugang Wen, MD, PhD
Quan Wang, MD, PhD
Chongzhi Zhou, MD, PhD
Dongwang Yan, MD, PhD
Guoqiang Qiu, MD
Chun Yang, MD, PhD
Huamei Tang, MD
Zhihai Peng, MD, PhD
Publikationsdatum
01.12.2011
Verlag
Springer-Verlag
Erschienen in
Annals of Surgical Oncology / Ausgabe 13/2011
Print ISSN: 1068-9265
Elektronische ISSN: 1534-4681
DOI
https://doi.org/10.1245/s10434-011-1668-5

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