Serrated adenoma of the colorectum undergoes a proliferation versus differentiation process: new conceptual interpretation of morphogenesis.

Abstract:

OBJECTIVE:Serrated adenoma (SA) consists of glands both with intraluminal projection of tall columnar cells, which resemble the terminally differentiated cells in the surface epithelium, and with concave short cells, which resemble progenitor crypt cells of the colon. The aim of this study was to clarify the relationship between the serrated architecture and proliferation/differentiation process in SAs. METHODS:The expressions of both terminally differentiated markers, such as p21, cytokeratin 20 and carbonic anhydrase I, and progenitor/proliferative markers, such as beta-catenin, CD44 and Ki-67, were immunohistochemically examined in 43 SAs and 20 tubular adenomas. RESULTS:P21-positive cells were more abundant in SAs than in tubular adenomas. Cytokeratin 20 and carbonic anhydrase I expressions were confined to the tall cells, while nuclear beta-catenin and CD44 were expressed in the short cells in SAs. The Ki-67 labeling indices were significantly lower in tall cells than in short ones. CONCLUSIONS:SAs might undergo both proliferation and terminal differentiation, which is associated with unique serrated configuration.

journal_name

Oncology

journal_title

Oncology

authors

Jiao YF,Nakamura S,Sugai T,Yamada N,Habano W

doi

10.1159/000151359

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

127-34

issue

3-4

eissn

0030-2414

issn

1423-0232

pii

000151359

journal_volume

74

pub_type

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