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Prognostic relevance of collagen XVIII expression in metastatic gastric carcinoma

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Tumor Biology

Abstract

Collagen XVIII is a component of vascular and epithelial basement membranes. The C-terminal fragment of the protein is termed endostatin, and is a potent inhibitor of angiogenesis. No reports on the clinical implications of collagen XVIII expression in human gastric cancer are currently available. Here, we investigate the clinical significance of collagen XVIII expression in gastric cancer. Seven gastric cancer cell lines were subjected to Western blotting. Collagen XVIII expression was examined in 118 gastric carcinoma tissues via immunohistochemistry. Western blotting revealed the presence of the 22-kDa collagen XVIII protein in four of seven gastric cancer cell lines. Immunohistochemistry detected collagen XVIII expression in the tumor cytoplasm in 115 of 118 gastric carcinoma patients (97%). No correlation was evident between collagen XVIII expression score and clinicopathologic findings when all patients were considered together. However, on subgroup analysis, 42 of 70 patients with distant metastasis were classified into low or moderate collagen XVIII expression groups, whereas the remaining 28 patients were grouped as showing high collagen XVIII expression. The prognosis for patients with high collagen XVIII-expressing gastric carcinoma was significantly worse than that for patients displaying low or moderate collagen XVIII expression (median survival time, 7.8 months vs. 18.3 months [log-rank, p = 0.01]; median time to progression, 3 months vs. 8 months [log-rank, p = 0.01]). High expression of collagen XVIII is associated with poor prognosis in patients with metastatic gastric carcinoma. Further studies on larger patient populations are warranted to validate the utility of collagen XVIII as a prognostic biomarker in gastric carcinoma.

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Acknowledgments

This work was accomplished, in part, with financial support from St. Mary's Hospital of the Catholic University in 2008, and a grant from the Ministry of Health & Welfare, Republic of Korea, Metropolitan University Specialization Projects, in 2008. We are grateful to Jung-A Kim for collecting clinical data and to In Kyung Kwon for technical assistance.

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Authors and Affiliations

  1. Catholic Research Institutes of Medical Science, Catholic University, Seoul, South Korea

    Kyu Sang Lee

  2. Department of Pathology, College of Medicine, Catholic University, Seoul, South Korea

    Gyeong Sin Park

  3. Division of Medical Oncology, Department of Internal Medicine, College of Medicine, Catholic University, Seoul, South Korea

    Sook Hee Hong, Jae Ho Byun, In Sook Woo & Young Seon Hong

  4. Department of Surgery, College of Medicine, Catholic University, Seoul, South Korea

    Hae-Myung Jeon

  5. Department of Internal Medicine, St. Mary’s Hospital of the Catholic University, #62 Youido-dong, Youngdungpo-gu, Seoul, 150-713, South Korea

    In Sook Woo

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  1. Kyu Sang Lee
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  2. Gyeong Sin Park
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  4. Jae Ho Byun
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Correspondence to In Sook Woo.

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Kyu Sang Lee and Gyeong Sin Park are equal contributors

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Lee, K.S., Park, G.S., Hong, S.H. et al. Prognostic relevance of collagen XVIII expression in metastatic gastric carcinoma. Tumor Biol. 31, 165–170 (2010). https://doi.org/10.1007/s13277-010-0022-z

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  • DOI: https://doi.org/10.1007/s13277-010-0022-z

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