BACKGROUND: Lymph node metastasis is a key event of colorectal cancer (CRC) progression. Mesothelin is expressed in various types of malignant tumor and associated with an unfavorable prognosis. The full-length mesothelin (Full-ERC) is cleaved by protease into membrane-bound C-ERC/mesothelin and N-ERC/mesothelin which is secreted into the blood. The aim of this study was to examine the biological role of mesothelin in CRC by clinicopathological analysis and in vitro lymphatic invasion assay. METHODS: Ninety-one cases of CRC specimens were immunohistochemically examined and the localization of mesothelin in luminal membrane and/or cytoplasm was also evaluated. Lymphatic invasion assay was also performed using the human CRC cell line, WiDr, which was transfected with Full-, N- and C-ERC/mesothelin expression plasmids (Full-WiDr, N-WiDr and C-WiDr). RESULTS: Immunohistochemically, "luminal membrane positive" of mesothelin was identified in 37.4 %, and correlated with lymphatic permeation and lymph node metastasis, but not with patients' prognosis. Interestingly, among the patients with lymph node metastasis (N = 38), "luminal membrane positive" of mesothelin significantly correlated with unfavorable patients' outcome. In addition, lymphatic invasion assay revealed that Full-WiDr and C-WiDr more significantly invaded human lymphatic endothelial cells than the Mock-WiDr (P < 0.01). CONCLUSION: The luminal membrane expression of mesothelin was associated with unfavorable prognosis of CRC patients with lymph node metastasis. Moreover, this is the first report to prove the biological function of C-ERC/mesothelin associated with lymphatic invasion of cancer in vitro.
BACKGROUND: Lymph node metastasis is a key event of colorectal cancer (CRC) progression. Mesothelin is expressed in various types of malignant tumor and associated with an unfavorable prognosis. The full-length mesothelin (Full-ERC) is cleaved by protease into membrane-bound C-ERC/mesothelin and N-ERC/mesothelin which is secreted into the blood. The aim of this study was to examine the biological role of mesothelin in CRC by clinicopathological analysis and in vitro lymphatic invasion assay. METHODS: Ninety-one cases of CRC specimens were immunohistochemically examined and the localization of mesothelin in luminal membrane and/or cytoplasm was also evaluated. Lymphatic invasion assay was also performed using the human CRC cell line, WiDr, which was transfected with Full-, N- and C-ERC/mesothelin expression plasmids (Full-WiDr, N-WiDr and C-WiDr). RESULTS: Immunohistochemically, "luminal membrane positive" of mesothelin was identified in 37.4 %, and correlated with lymphatic permeation and lymph node metastasis, but not with patients' prognosis. Interestingly, among the patients with lymph node metastasis (N = 38), "luminal membrane positive" of mesothelin significantly correlated with unfavorable patients' outcome. In addition, lymphatic invasion assay revealed that Full-WiDr and C-WiDr more significantly invaded human lymphatic endothelial cells than the Mock-WiDr (P < 0.01). CONCLUSION: The luminal membrane expression of mesothelin was associated with unfavorable prognosis of CRC patients with lymph node metastasis. Moreover, this is the first report to prove the biological function of C-ERC/mesothelin associated with lymphatic invasion of cancer in vitro.
Authors: S Giacchetti; B Perpoint; R Zidani; N Le Bail; R Faggiuolo; C Focan; P Chollet; J F Llory; Y Letourneau; B Coudert; F Bertheaut-Cvitkovic; D Larregain-Fournier; A Le Rol; S Walter; R Adam; J L Misset; F Lévi Journal: J Clin Oncol Date: 2000-01 Impact factor: 44.544
Authors: Barbara Garmy-Susini; Christie J Avraamides; Michael C Schmid; Philippe Foubert; Lesley G Ellies; Leo Barnes; Chloe Feral; Thalia Papayannopoulou; Andrew Lowy; Sarah L Blair; David Cheresh; Mark Ginsberg; Judith A Varner Journal: Cancer Res Date: 2010-04-13 Impact factor: 12.701
Authors: J Souglakos; N Ziras; S Kakolyris; I Boukovinas; N Kentepozidis; P Makrantonakis; S Xynogalos; Ch Christophyllakis; Ch Kouroussis; L Vamvakas; V Georgoulias; A Polyzos Journal: Br J Cancer Date: 2012-01-12 Impact factor: 7.640
Authors: Jordan M Winter; Laura H Tang; David S Klimstra; Murray F Brennan; Jonathan R Brody; Flavio G Rocha; Xiaoyu Jia; Li-Xuan Qin; Michael I D'Angelica; Ronald P DeMatteo; Yuman Fong; William R Jarnagin; Eileen M O'Reilly; Peter J Allen Journal: PLoS One Date: 2012-07-06 Impact factor: 3.240