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The role of KLF4 in UVB-induced murine skin tumor development and its correlation with cyclin D1, p53, and p21Waf1/Cip1 in epithelial tumors of the human skin

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Abstract

The zinc-finger-type transcriptional factor KLF4 is expressed in a variety of tissues including skin. KLF4 can function as either a tumor suppressor or an oncogene, depending on the type of tissue in which it is expressed, by modulating the expression of various factors. To understand the role of KLF4 in human skin cancer and also to evaluate the expression of cyclin D1, p53, and p21Waf1/Cip1 in relation to the expression of KLF4, we evaluated the pattern of KLF4 expression during UVB-induced skin tumor development in SKH-1 hairless mice and in human skin cancer. We also determined whether there are correlations between the expression of KLF4, cyclin D1, p53, and p21 and non-melanoma skin tumors. KLF4 expression was found in the basal layer of non-irradiated control murine skin. Chronic UVB irradiation caused a progressive decrease in KLF4 expression, which was substantially decreased in UVB-induced murine skin tumors. In human precancerous lesions, KLF4 expression was maintained in 64.3% of Bowen’s disease samples and 90.0% of AK samples. In contrast, KLF4 expression was significantly reduced in human cancer lesions (p = 0.004). A positive correlation was found between the expression of KLF4 and p21Waf1/Cip1 in AK, whereas there was a negative correlation between the expression of cyclin D1 and p21Waf1/Cip1 in Bowen’s disease. Thus, our results suggest that KLF4 may function as a tumor suppressor in the skin and that the deregulated expression of KLF4 in the context of p21Waf1/Cip1 and cyclin D1 expression may be involved in skin tumorigenesis.

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Authors and Affiliations

  1. Department of Dermatology, Hallym University Sacred Heart Hospital, 896, Pyungchon-dong, Dongan-gu, Anyang, Gyeonggi-do, 431-070, Republic of Korea

    Woo Jin Choi, Sung Hwan Youn, Saebomi Park, Eun Joo Park, Kwang Joong Kim & Kwang Ho Kim

  2. Department of Dermatology, Columbia University Medical Center, Irving Cancer Research Center, New York, USA

    Jung Ho Back & Arianna L. Kim

  3. Department of Pathology, Hallym University Sacred Heart Hospital, Anyang, Korea

    Hye Rim Park

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  1. Woo Jin Choi
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  2. Sung Hwan Youn
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Correspondence to Kwang Ho Kim.

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Choi, W.J., Youn, S.H., Back, J.H. et al. The role of KLF4 in UVB-induced murine skin tumor development and its correlation with cyclin D1, p53, and p21Waf1/Cip1 in epithelial tumors of the human skin. Arch Dermatol Res 303, 191–200 (2011). https://doi.org/10.1007/s00403-010-1101-0

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  • DOI: https://doi.org/10.1007/s00403-010-1101-0

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