Abstract：
:Alterations in the Notch signaling pathway play a role in colorectal cancer (CRC). Hes1, a Notch-induced transcription factor, has recently been reported to show decreased expression by immunohistochemistry in sessile serrated adenomas. Variable staining patterns have been reported in tubular adenomas, and existing data on Hes1 expression in CRC are limited and inconsistent. We therefore sought to investigate the expression of Hes1 by immunohistochemistry in a large and well-characterized cohort of CRC patients to determine clinicopathological associations and prognostic significance. Immunohistochemistry for Hes1 was performed on 2775 consecutive CRCs in tissue microarray format. Hes1 expression was classified into 3 categories: absent, 1302 cases (46.9%); cytoplasmic staining only with loss of nuclear staining, 1002 cases (36.1%); and nuclear with or without cytoplasmic staining, 471 cases (17%). In univariate analysis, loss of nuclear expression of HES1 was significantly associated with older age, female sex, right-sided location, mucinous or medullary histology, higher histological grade, microsatellite instability, BRAFV600E mutation, and larger tumor size. Strong and statistically significant associations with female sex, right-sided location, BRAFV600E mutation, microsatellite instability, and larger size remained in multivariate analysis. Patients with loss of nuclear expression of Hes1 had a significantly worse all-cause 5-year survival in both univariate (P = .002) and multivariate (P = .009) analysis. We conclude that loss of nuclear expression of Hes1 occurs in 83% of CRCs when studied in tissue microarray format and is associated with female sex, right-sided location, BRAFV600E mutation, microsatellite instability, larger tumor size, and significantly worse survival.
journal_name
Hum Patholjournal_title
Human pathologyauthors
Ahadi M,Andrici J,Sioson L,Sheen A,Clarkson A,Gill AJdoi
10.1016/j.humpath.2016.07.010subject
Has Abstractpub_date
2016-11-01 00:00:00pages
91-97eissn
0046-8177issn
1532-8392pii
S0046-8177(16)30162-9journal_volume
57pub_type
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