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Article

Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma

  • Authors:
    • Jun Sang Bae
    • Ha Na Choi
    • Sang Jae Noh
    • Byung Hyun Park
    • Kyu Yun Jang
    • Cheol Keun Park
    • Woo Sung Moon
  • View Affiliations / Copyright

    Affiliations: Department of Pathology, Chonbuk National University, Medical School and Research Institute for Endocrine Sciences, Jeonju, 561-756, Republic of Korea, Department of Biochemistry, Chonbuk National University, Medical School and Research Institute for Endocrine Sciences, Jeonju, 561-756, Republic of Korea, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-701, Republic of Korea
  • Pages: 213-220
    |
    Published online on: May 25, 2012
       https://doi.org/10.3892/ol.2012.731
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Abstract

Hepatocellular carcinoma (HCC) is one of the most common types of malignant tumors characterized by a multistep process of tumor development. Nodular lesions that differ from the surrounding liver parenchyma and are characterized by cytological or structural atypia are termed dysplastic nodules (DNs). DNs are well-known precancerous HCC lesions. Expression of keratin (K) 19 and K7, molecular markers of hepatic progenitor cells and cholangiocytes, has been reported in certain HCCs. However, it remains unclear whether K19-positive HCC cells are derived from true hepatic progenitor cells or mature cells that have undergone a dedifferentiation or a transdifferentiation process. In total, 107 tissue sections (13 low-grade DNs, 15 high‑grade DNs, 27 small HCCs and 52 large HCCs) from resected liver samples and 132 HCC tissue microarray (TMA) cores were subjected to immuno­histochemical analysis for K19 and K7. Clinicopathological data of the HCC patients were evaluated. K19 expression was found in 0% of DNs, 19% of small HCCs (≤2 cm), 8% of large HCCs (>2 cm) and 8% of TMA samples. K7 expression was found in 14% of DNs, 41% of small HCCs, 15% of large HCCs and 6% of TMA samples. Among the five K19-positive small HCCs, four were distinctly nodular and one tumor was an infiltrative type. No vaguely nodular HCC was positive for K19. K19 expression was significantly associated with histological grade (P=0.023), serum α-fetoprotein level (P=0.001) and K7 expression (P=0.001) in HCC. K19 expression was an independent prognostic factor for overall survival in non-viral HCC patients (P=0.003). K19 expression is extremely rare in DNs and occurs in progressed small HCCs. Our results suggest that K19 expression may be an acquired feature of carcinoma cells during HCC progression in certain HCCs.
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Copy and paste a formatted citation
Spandidos Publications style
Bae JS, Choi HN, Noh SJ, Park BH, Jang KY, Park CK and Moon WS: Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma. Oncol Lett 4: 213-220, 2012.
APA
Bae, J.S., Choi, H.N., Noh, S.J., Park, B.H., Jang, K.Y., Park, C.K., & Moon, W.S. (2012). Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma. Oncology Letters, 4, 213-220. https://doi.org/10.3892/ol.2012.731
MLA
Bae, J. S., Choi, H. N., Noh, S. J., Park, B. H., Jang, K. Y., Park, C. K., Moon, W. S."Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma". Oncology Letters 4.2 (2012): 213-220.
Chicago
Bae, J. S., Choi, H. N., Noh, S. J., Park, B. H., Jang, K. Y., Park, C. K., Moon, W. S."Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma". Oncology Letters 4, no. 2 (2012): 213-220. https://doi.org/10.3892/ol.2012.731
Copy and paste a formatted citation
x
Spandidos Publications style
Bae JS, Choi HN, Noh SJ, Park BH, Jang KY, Park CK and Moon WS: Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma. Oncol Lett 4: 213-220, 2012.
APA
Bae, J.S., Choi, H.N., Noh, S.J., Park, B.H., Jang, K.Y., Park, C.K., & Moon, W.S. (2012). Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma. Oncology Letters, 4, 213-220. https://doi.org/10.3892/ol.2012.731
MLA
Bae, J. S., Choi, H. N., Noh, S. J., Park, B. H., Jang, K. Y., Park, C. K., Moon, W. S."Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma". Oncology Letters 4.2 (2012): 213-220.
Chicago
Bae, J. S., Choi, H. N., Noh, S. J., Park, B. H., Jang, K. Y., Park, C. K., Moon, W. S."Expression of K19 and K7 in dysplastic nodules and hepatocellular carcinoma". Oncology Letters 4, no. 2 (2012): 213-220. https://doi.org/10.3892/ol.2012.731
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