High Prevalence of Caecal Dysplasia in Wistar/Furth Substrain Rats

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Title ( eng )
High Prevalence of Caecal Dysplasia in Wistar/Furth Substrain Rats
Title ( jpn )
Wistar/Furth 亜系ラットに認められた盲腸部異型上皮について
Creator
Naito Masashi
Naito Yukiko
Watanabe Hiromitsu
Ito Akihiro
Source Title
Hiroshima Journal of Medical Sciences
Volume 32
Issue 3
Start Page 295
End Page 299
Journal Identifire
[PISSN] 0018-2052
[EISSN] 2433-7668
[NCID] AA00664312
Abstract
Offspring of spontaneous colon tumor prone rats (WF/O) bred in our laboratory developed tumors in a very low incidence (less than 0.2 %), but about half of these rats had dysplastic epithelium with frequent erosion in the caecum. In nine animals (4.4%) submucosal glands of the caecum were observed. These dysplasia accompanied inflammatory cell reactions and regional lymph nodes were enlarged and packed with many plasma cells. Hybrid of WF/O rats and other inbred Long-Evans strain (LE) rats, having no dysplastic lesion of the caecum, had caecal dysplasia in a low incidence (10%). These data suggest that genetic factor(s) play an important role in the occurrence of caecal dysplasia in WF/O rats. These changes may be a precondition to the spontaneous occurrence of tumors in the proximal portion of the ascending colon with the aid of promoting factor(s).
Keywords
Caecal dysplasia
Spontaneous colon tumor
Rats
NDC
Medical sciences [ 490 ]
Language
eng
Resource Type departmental bulletin paper
Publisher
Hiroshima University School of Medicine
Date of Issued 1983-09
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0018-2052
[NCID] AA00664312
[PMID] 6643108