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Expression of Krüppel-like factor 5 in human gastric carcinomas

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Abstract

Purpose

Krüppel-like factor 5 (KLF5) is a zinc finger transcription factor, which has recently attracted attention because of its important regulatory activities linked to diverse functions such as cell growth, proliferation, differentiation, and tumorigenesis in a number of systems. However, its expression in human gastric cancer has not been described previously. In this study, we investigated the expression profile of KLF5 and the relationship between its clinicopathologic features and expression in gastric carcinomas.

Methods

Tissues were obtained from 247 gastric carcinoma patients who underwent curative gastrectomy (R0 resection) at the Department of Surgery, Seoul National University Hospital from January 1995 to June 1995, and these tissues were arranged in tissue array blocks. KLF5 expression was analyzed by immunohistochemical staining using anti-BTEB2 mouse monoclonal antibodies (Santa Cruz Biotechnology Inc., Santa Cruz, CA, USA).

Results

Overall KLF5 was found to be expressed in 45.7% (113/247) of tumor tissues. Moreover, its expression rate was significantly high in early-staged gastric cancer (63.2 vs. 38.0%, p < 0.001), in gastric cancer without lymph node metastasis (54.0 vs. 40.1%, p = 0.04), and in tumors <5 cm in size (53.0 vs. 38.1%, p = 0.02). The 5-year survival rate of patients with KLF5-positive tumors was higher than those of patients with KLF5-negative tumors, although this was not statistically significant (74.7 vs. 62.2%, p = 0.057).

Conclusion

KLF5 expression rate was high in early-staged gastric cancer, in small gastric cancer tissues and in gastric cancer without lymph node metastasis. By univariate analysis, its expression was found to favor survival after surgery. Our study describes for the first time the expression profile of KLF5 in a large number of human gastric cancer tissues and suggests consistent results shown in many recent studies that reduction of KLF5 expression occurs in many types of human tumor.

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Acknowledgments

This study was supported by a grant from the Ministry of Science and Technology, South Korea and the Seoul National University College of Medicine Research Fund 2005.

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Authors and Affiliations

  1. Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea

    Mi Kyung Kwak, Hyuk-Joon Lee, Keun Hur, Do Joong Park, Woo Ho Kim & Han-Kwang Yang

  2. Department of Surgery, Cancer Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-744, Korea

    Hyuk-Joon Lee, Do Joong Park, Kuhn Uk Lee, Kuk Jin Choe & Han-Kwang Yang

  3. Department of Pathology, Seoul National University College of Medicine, Seoul, South Korea

    Hye Seung Lee & Woo Ho Kim

  4. Cancer Genetics Laboratory, Biochemistry Department, University of Otago, Dunedin, New Zealand

    Parry Guilford

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  1. Mi Kyung Kwak
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  2. Hyuk-Joon Lee
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  3. Keun Hur
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  4. Do Joong Park
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  5. Hye Seung Lee
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  7. Kuhn Uk Lee
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  9. Parry Guilford
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  10. Han-Kwang Yang
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Correspondence to Han-Kwang Yang.

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Kwak, M.K., Lee, HJ., Hur, K. et al. Expression of Krüppel-like factor 5 in human gastric carcinomas. J Cancer Res Clin Oncol 134, 163–167 (2008). https://doi.org/10.1007/s00432-007-0265-2

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  • DOI: https://doi.org/10.1007/s00432-007-0265-2

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