Abstract:
AIMS:Adenoviral inclusions are commonly seen in appendices from infants with intussusception. They are associated with focal epithelial budding and less frequently with epithelial shedding. These morphological changes could depend on the opposing effects of adenoviral gene products on CD95-mediated apoptosis. METHODS AND RESULTS:Appendices from intussusceptions with viral inclusions (n = 4) and normal appendices (n = 10) were studied by immunochemistry with anti-adenovirus, anti-CD95 and anti-HLA-DR antibodies. Apoptosis was studied by the TUNEL method. The mucosa of normal appendices contained no adenoviral protein. CD95 was present in all epithelial cells except Paneth cells. HLA-DR was absent in epithelial cells and apoptosis was seen only in germinal centres and in a few surface epithelial cells. The epithelium of appendices from intussusceptions contained nuclear inclusions labelled with anti-adenovirus antibody, always found in the epithelial buds. The epithelial CD95 pattern was drastically altered in adenovirus-infected appendices. CD95 was absent from the budding foci. In these foci, HLA-DR was overexpressed. There was also increased epithelial apoptosis in areas remote from those lacking CD95 antigen. CONCLUSIONS:The appearance of epithelial budding or shedding in appendices from intussusception could be due to focal in situ differences in the expression of adenoviral genes.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Larousserie F,Berrebi D,Florentin A,De Lagausie P,Aigrain Y,Peuchmaur Mdoi
10.1046/j.1365-2559.1997.2840875.xsubject
Has Abstractpub_date
1997-10-01 00:00:00pages
342-6issue
4eissn
0309-0167issn
1365-2559journal_volume
31pub_type
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