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Assessment of SMAD4, p53, and Ki-67 alterations as a predictor of liver metastasis in human colorectal cancer

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Abstract

Purpose

The liver is the most common site of metastasis in patients with colorectal cancer (CRC), and this is a determinant of the prognosis. However, no reliable molecular predictors of liver metastasis have yet been identified.

Methods

Sixty-two surgical specimens of colorectal cancer were studied. The first group included 25 patients who achieved a disease-free survival period of at least 6 years (CRC-M0), and the second group included 37 patients with synchronous (n = 22) or metachronous (n = 15) liver metastasis (CRC-M1). SMAD4, p53, and Ki-67 expression levels were assessed immunohistochemically.

Results

The loss of SMAD4 expression and elevated Ki-67 expression were found significantly more frequently in CRC-M1 patients than in CRC-M0 patients (P = 0.0047 and P = 0.013, respectively). Statistically significant differences were also observed between the CRC-M0 group and the metachronous metastasis group. No difference was seen in the overexpression of p53 between the groups. A combination analysis of SMAD4 and Ki-67 revealed no cases with maintained levels of SMAD4 and a low Ki-67 expression had or developed liver metastasis.

Conclusion

The loss of SMAD4 expression and elevated Ki-67 expression was therefore found to significantly correlate with liver metastasis, regardless of the time of occurrence, thus indicating these factors to be predictive markers for liver metastasis in patients with CRC.

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Authors and Affiliations

  1. Department of Surgery, Tokyo Metropolitan Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, 113-8677, Japan

    Masayo Kawakami, Tatsuro Yamaguchi, Keiichi Takahashi, Hiroshi Matsumoto, Michiya Yasutome & Takeo Mori

  2. Department of Pathology, Tokyo Metropolitan Komagome Hospital, 3-18-22 Honkomagome, Bunkyo-ku, Tokyo, 113-8677, Japan

    Shinichiro Horiguchi, Yukiko Hayashi & Nobuaki Funata

  3. Department of Surgery, Tokyo Metropolitan Hiroo Hospital, Tokyo, Japan

    Masayo Kawakami

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  1. Masayo Kawakami
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Kawakami, M., Yamaguchi, T., Takahashi, K. et al. Assessment of SMAD4, p53, and Ki-67 alterations as a predictor of liver metastasis in human colorectal cancer. Surg Today 40, 245–250 (2010). https://doi.org/10.1007/s00595-009-4028-3

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  • DOI: https://doi.org/10.1007/s00595-009-4028-3

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