Tumor budding in colorectal carcinoma assessed by cytokeratin immunostaining and budding areas: Possible involvement of c‐Met

Tumor budding/sprouting has been shown to be an independent adverse prognostic factor in T1 and T3N0 colorectal carcinomas, however, its assessment could be improved by more accurate identification of budding carcinoma cells and consideration of budding areas. Moreover, tumor budding mechanisms are...

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Veröffentlicht in:Cancer science 2014-11, Vol.105 (11), p.1487-1495
Hauptverfasser: Satoh, Keisuke, Nimura, Satoshi, Aoki, Mikiko, Hamasaki, Makoto, Koga, Kaori, Iwasaki, Hiroshi, Yamashita, Yuichi, Kataoka, Hiroaki, Nabeshima, Kazuki
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container_end_page 1495
container_issue 11
container_start_page 1487
container_title Cancer science
container_volume 105
creator Satoh, Keisuke
Nimura, Satoshi
Aoki, Mikiko
Hamasaki, Makoto
Koga, Kaori
Iwasaki, Hiroshi
Yamashita, Yuichi
Kataoka, Hiroaki
Nabeshima, Kazuki
description Tumor budding/sprouting has been shown to be an independent adverse prognostic factor in T1 and T3N0 colorectal carcinomas, however, its assessment could be improved by more accurate identification of budding carcinoma cells and consideration of budding areas. Moreover, tumor budding mechanisms are yet to be defined. In this study, we evaluated the identification of budding tumor cells by either H&E staining alone or H&E with immunohistochemistry and developed a scoring system based on budding grades and areas. We examined whether the budding score correlated with clinicopathologic features and prognosis and the association between tumor budding/sprouting and c‐Met protein expression and phosphorylation and MET gene copy numbers because c‐Met is known to play an important role in colorectal carcinoma tumorigenesis. Cytokeratin immunohistochemistry could identify tumors with shorter disease‐free survival (DFS) from the low‐grade budding group assessed with H&E alone. High budding scores based on budding grade and area were more significantly correlated with DFS than scores obtained using the budding grade alone. In tumors with a high budding score, c‐Met expression and phosphorylation levels and MET gene copy numbers were significantly increased at the invasive front compared with those in superficial tumor portions. This study showed for the first time that high levels of phospho‐c‐Met at the invasive front were significantly associated with a high budding score and shorter DFS. In conclusion, a budding score assessed by budding grades and budding‐positive areas correlates highly with clinicopathologic aggressive features of colorectal carcinoma. Our study had two major aims: (1) To evaluate the associations between our scoring system for tumor budding/sprouting, which included budding grade and the proportion of budding‐positive areas, and clinicopathologic factors or prognosis; and (2) To assess the association between c‐Met expression and tumor budding/sprouting.
doi_str_mv 10.1111/cas.12530
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Moreover, tumor budding mechanisms are yet to be defined. In this study, we evaluated the identification of budding tumor cells by either H&amp;E staining alone or H&amp;E with immunohistochemistry and developed a scoring system based on budding grades and areas. We examined whether the budding score correlated with clinicopathologic features and prognosis and the association between tumor budding/sprouting and c‐Met protein expression and phosphorylation and MET gene copy numbers because c‐Met is known to play an important role in colorectal carcinoma tumorigenesis. Cytokeratin immunohistochemistry could identify tumors with shorter disease‐free survival (DFS) from the low‐grade budding group assessed with H&amp;E alone. High budding scores based on budding grade and area were more significantly correlated with DFS than scores obtained using the budding grade alone. In tumors with a high budding score, c‐Met expression and phosphorylation levels and MET gene copy numbers were significantly increased at the invasive front compared with those in superficial tumor portions. This study showed for the first time that high levels of phospho‐c‐Met at the invasive front were significantly associated with a high budding score and shorter DFS. In conclusion, a budding score assessed by budding grades and budding‐positive areas correlates highly with clinicopathologic aggressive features of colorectal carcinoma. Our study had two major aims: (1) To evaluate the associations between our scoring system for tumor budding/sprouting, which included budding grade and the proportion of budding‐positive areas, and clinicopathologic factors or prognosis; and (2) To assess the association between c‐Met expression and tumor budding/sprouting.</abstract><cop>England</cop><pub>John Wiley &amp; Sons, Inc</pub><pmid>25220207</pmid><doi>10.1111/cas.12530</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Aged
Aged, 80 and over
Angiogenesis
Cell adhesion & migration
Cell growth
Classification
Colorectal cancer
Colorectal carcinoma
Colorectal Neoplasms - genetics
Colorectal Neoplasms - metabolism
Colorectal Neoplasms - mortality
Colorectal Neoplasms - pathology
Colorectal Neoplasms - surgery
Cytokeratin
c‐Met
Female
Fibroblasts
Gene amplification
Growth factors
Humans
Immunohistochemistry
In Situ Hybridization, Fluorescence
Invasiveness
Keratins - metabolism
Male
Medical prognosis
MET protein
Metastasis
Middle Aged
Neoplasm Grading
Neoplasm Metastasis
Neoplasm Staging
Original
Patients
Phosphorylation
Prognosis
Proteins
Proto-Oncogene Proteins c-met - genetics
Proto-Oncogene Proteins c-met - metabolism
Retrospective Studies
sprouting
Studies
tumor budding
Tumor cells
tumor invasion
Tumorigenesis
Tumors
title Tumor budding in colorectal carcinoma assessed by cytokeratin immunostaining and budding areas: Possible involvement of c‐Met
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