Induction of MHC class II gene products in rat intestinal epithelium during graft-versus-host disease and effects on the immune function of the epithelium.
Immunology
; 75(2): 366-71, 1992 Feb.
Article
em En
| MEDLINE
| ID: mdl-1551699
ABSTRACT
The induction of major histocompatibility complex (MHC) class II expression in the epithelium of the small intestine of the rat during graft-versus-host disease (GVHD) and the effect of this process on the capacity of isolated epithelial cells to present antigen has been investigated. By immunohistology, increased class II (I-A) was noted in lamina propria cells and villus epithelium and de novo expression in crypt epithelium by Day 7 after transfer of parental spleen cells into irradiated hybrid rats. This increased expression reached a maximum by Day 9 or 10. The kinetics of induction of I-E products paralleled those of I-A in villus epithelium, but I-E was not seen in crypt epithelium. Direct radioimmunoassay of class II in isolated villus and crypt epithelial cells revealed a minor peak of class II, particularly in villus cells, very soon after cell transfer which waned and then increased to a second peak at Days 7-9. Assay of presentation of ovalbumin by isolated enterocytes to primed T cells at the peak of class II induction showed that increased class II expression by villus cells mediated enhanced antigen-presenting activity, whereas increases in crypt cell class II did not enable these cells to present ovalbumin.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Expressão Gênica
/
Genes MHC da Classe II
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Doença Enxerto-Hospedeiro
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Intestino Delgado
Limite:
Animals
Idioma:
En
Revista:
Immunology
Ano de publicação:
1992
Tipo de documento:
Article