A scanning electron microscopy study of changes in the colonic mucus layer during chemical carcinogenesis.

Abstract:

:Scanning electron microscopy was used to examine the appearances of the colonic mucus layer of rats during chemical carcinogenesis with dimethylhydrazine. The normal colonic mucus layer had a dense homogeneous appearance and provided a complete cover for the mucosal epithelium. At high magnifications tiny fenestrations could be seen in this mucus layer. During carcinogenesis these fenestrations enlarged, increased in number, and coalesced, causing focal defects in the mucus layer, which eventually broke into strands and clumps of mucus. The findings indicate that the colonic mucus layer develops progressive abnormalities during carcinogenesis which result in breakdown of its integrity and exposure of the mucosal epithelium to colonic contents.

journal_name

Cancer

journal_title

Cancer

authors

Traynor OJ,Costa NL,Wood CB

doi

10.1002/1097-0142(19830515)51:10<1847::aid-cncr282

subject

Has Abstract

pub_date

1983-05-15 00:00:00

pages

1847-53

issue

10

eissn

0008-543X

issn

1097-0142

journal_volume

51

pub_type

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