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High intratumoral expression of fibroblast activation protein (FAP) in colon cancer is associated with poorer patient prognosis.
Umeå University, Faculty of Medicine, Department of Medical Biosciences, Pathology.
Umeå University, Faculty of Medicine, Department of Medical Biosciences, Pathology.
Umeå University, Faculty of Medicine, Department of Medical Biosciences, Pathology.
Umeå University, Faculty of Medicine, Department of Medical Biosciences, Pathology.
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2013 (English)In: Tumor Biology, ISSN 1010-4283, E-ISSN 1423-0380, Vol. 34, no 2, 1013-1020 p.Article in journal (Refereed) Published
Abstract [en]

-An active stroma is important for cancer cell invasion and metastasis. We investigated the expression of fibroblast activation protein (FAP) in relation to patient prognosis in colorectal cancer. Colorectal cancer specimens from 449 patients were immunohistochemically stained with a FAP antibody and evaluated in the tumor center and tumor front using a semiquantitative four-level scale. FAP was expressed by fibroblasts in 85-90 % of the tumors examined. High versus no/low expression in the tumor center was associated with poor prognosis (multivariate hazard ratio, HR = 1.72; 95 % CI 1.07-2.77, p = 0.025). FAP expression in the tumor front, though more frequent than in the tumor center, was not associated with prognosis. FAP expression in the tumor center was more common in specimens with positive microsatellite instability (MSI) screening status and in patients with high CpG island methylator phenotype (CIMP) status. However, inclusion of MSI screening status and CIMP status in the multivariate analysis strengthened the risk estimates for high FAP expression in the tumor center (HR = 1.89; 95 % CI 1.13-3.14; p = 0.014), emphasizing the role of FAP as an independent prognostic factor. Stromal FAP expression is common in colorectal cancer, and we conclude that high FAP expression in the tumor center, but not the tumor front, is an independent negative prognostic factor.

Place, publisher, year, edition, pages
Springer Netherlands, 2013. Vol. 34, no 2, 1013-1020 p.
Keyword [en]
Colorectal cancer, Fibroblast, Prognosis, Microsatellite instability, CIMP
National Category
Cancer and Oncology Surgery
Identifiers
URN: urn:nbn:se:umu:diva-67856DOI: 10.1007/s13277-012-0638-2PubMedID: 23328994OAI: oai:DiVA.org:umu-67856DiVA: diva2:614445
Available from: 2013-04-04 Created: 2013-04-04 Last updated: 2017-12-06Bibliographically approved

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Wikberg, Maria L.Edin, SofiaLundberg, Ida V.Van Guelpen, BethanyDahlin, Anna M.Rutegård, JörgenStenling, RogerÖberg, ÅkePalmqvist, Richard
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