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Expression and subcellular localization of AT motif binding factor 1 in colon tumours

AT motif binding factor 1 (ATBF1) is a transcriptional regulator that functions as a tumour suppressor to negatively affect cancer cell growth. In the present study four specific polyclonal antibodies against ATBF1 were generated, and the expression and intracellular localization of ATBF1 in colonic...

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Autores principales: Kataoka, Hiromi, Miura, Yutaka, Kawaguchi, Makoto, Suzuki, Shugo, Okamoto, Yasuyuki, Ozeki, Keiji, Shimura, Takaya, Mizoshita, Tsutomu, Kubota, Eiji, Tanida, Satoshi, Takahashi, Satoru, Asai, Kiyofumi, Joh, Takashi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: D.A. Spandidos 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5548027/
https://www.ncbi.nlm.nih.gov/pubmed/28713972
http://dx.doi.org/10.3892/mmr.2017.7016
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author Kataoka, Hiromi
Miura, Yutaka
Kawaguchi, Makoto
Suzuki, Shugo
Okamoto, Yasuyuki
Ozeki, Keiji
Shimura, Takaya
Mizoshita, Tsutomu
Kubota, Eiji
Tanida, Satoshi
Takahashi, Satoru
Asai, Kiyofumi
Joh, Takashi
author_facet Kataoka, Hiromi
Miura, Yutaka
Kawaguchi, Makoto
Suzuki, Shugo
Okamoto, Yasuyuki
Ozeki, Keiji
Shimura, Takaya
Mizoshita, Tsutomu
Kubota, Eiji
Tanida, Satoshi
Takahashi, Satoru
Asai, Kiyofumi
Joh, Takashi
author_sort Kataoka, Hiromi
collection PubMed
description AT motif binding factor 1 (ATBF1) is a transcriptional regulator that functions as a tumour suppressor to negatively affect cancer cell growth. In the present study four specific polyclonal antibodies against ATBF1 were generated, and the expression and intracellular localization of ATBF1 in colonic mucosae, polyps, adenoma and adenocarcinoma tissue samples were investigated. The four polyclonal antibodies produced were as follows: MB34 and MB49, which recognize the N- and C-terminal fragments of ATBF1, respectively; and D1-120 and MB44, which recognize the middle fragments of ATBF1 that contain three nuclear localization signals (NLS). In total, 191 colon samples were examined by immunohistochemical analysis. In addition, colon cancer cells were transfected with four ATBF1 expression vectors, and the subcellular localization of each fragment was examined. Normal colon mucosal cells were not observed to express ATBF1. However, a small number of hyperplastic polyps, serrated adenomas and tubular adenomas expressed ATBF1. Colon cancer cells were observed to express D1-120- and MB44-reactive middle fragments of ATBF1 in their cell nuclei. However, the N- and C-terminal fragments of ATBF1 did not translocate to the nucleus. Transfection of ATBF1 fragments revealed cleavage of the ATBF1 protein and nuclear translocation of the cleaved middle portion containing the NLS. A positive correlation between the cytoplasmic localization of the N- and C-termini of ATBF1, nuclear localization of the middle portion of ATBF1 and malignant cancer cell invasion was observed. In conclusion, the results of the present study suggest that alterations in the expression and subcellular localization of ATBF1, as a result of post-transcriptional modifications, are associated with malignant features of colon tumours.
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spelling pubmed-55480272017-10-24 Expression and subcellular localization of AT motif binding factor 1 in colon tumours Kataoka, Hiromi Miura, Yutaka Kawaguchi, Makoto Suzuki, Shugo Okamoto, Yasuyuki Ozeki, Keiji Shimura, Takaya Mizoshita, Tsutomu Kubota, Eiji Tanida, Satoshi Takahashi, Satoru Asai, Kiyofumi Joh, Takashi Mol Med Rep Articles AT motif binding factor 1 (ATBF1) is a transcriptional regulator that functions as a tumour suppressor to negatively affect cancer cell growth. In the present study four specific polyclonal antibodies against ATBF1 were generated, and the expression and intracellular localization of ATBF1 in colonic mucosae, polyps, adenoma and adenocarcinoma tissue samples were investigated. The four polyclonal antibodies produced were as follows: MB34 and MB49, which recognize the N- and C-terminal fragments of ATBF1, respectively; and D1-120 and MB44, which recognize the middle fragments of ATBF1 that contain three nuclear localization signals (NLS). In total, 191 colon samples were examined by immunohistochemical analysis. In addition, colon cancer cells were transfected with four ATBF1 expression vectors, and the subcellular localization of each fragment was examined. Normal colon mucosal cells were not observed to express ATBF1. However, a small number of hyperplastic polyps, serrated adenomas and tubular adenomas expressed ATBF1. Colon cancer cells were observed to express D1-120- and MB44-reactive middle fragments of ATBF1 in their cell nuclei. However, the N- and C-terminal fragments of ATBF1 did not translocate to the nucleus. Transfection of ATBF1 fragments revealed cleavage of the ATBF1 protein and nuclear translocation of the cleaved middle portion containing the NLS. A positive correlation between the cytoplasmic localization of the N- and C-termini of ATBF1, nuclear localization of the middle portion of ATBF1 and malignant cancer cell invasion was observed. In conclusion, the results of the present study suggest that alterations in the expression and subcellular localization of ATBF1, as a result of post-transcriptional modifications, are associated with malignant features of colon tumours. D.A. Spandidos 2017-09 2017-07-15 /pmc/articles/PMC5548027/ /pubmed/28713972 http://dx.doi.org/10.3892/mmr.2017.7016 Text en Copyright: © Kataoka et al. This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/) , which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
spellingShingle Articles
Kataoka, Hiromi
Miura, Yutaka
Kawaguchi, Makoto
Suzuki, Shugo
Okamoto, Yasuyuki
Ozeki, Keiji
Shimura, Takaya
Mizoshita, Tsutomu
Kubota, Eiji
Tanida, Satoshi
Takahashi, Satoru
Asai, Kiyofumi
Joh, Takashi
Expression and subcellular localization of AT motif binding factor 1 in colon tumours
title Expression and subcellular localization of AT motif binding factor 1 in colon tumours
title_full Expression and subcellular localization of AT motif binding factor 1 in colon tumours
title_fullStr Expression and subcellular localization of AT motif binding factor 1 in colon tumours
title_full_unstemmed Expression and subcellular localization of AT motif binding factor 1 in colon tumours
title_short Expression and subcellular localization of AT motif binding factor 1 in colon tumours
title_sort expression and subcellular localization of at motif binding factor 1 in colon tumours
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5548027/
https://www.ncbi.nlm.nih.gov/pubmed/28713972
http://dx.doi.org/10.3892/mmr.2017.7016
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