TITLE

Recipients with In Utero Induction of Tolerance Upregulated MHC Class I in the Engrafted Donor Skin

AUTHOR(S)
Jeng-Chang Chen; Liang-Shiou Ou; Hsiu-Yueh Yu; Ming-Ling Kuo; Pei-Yeh Chang; Hsueh-Ling Chang
PUB. DATE
January 2014
SOURCE
Disease Markers;2014, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The alterations in MHC class I expression play a crucial step in immune evasion of cancer or virus-infected cells. This study aimed to examine whether tolerized grafts modified MHC class I expression. FVB/N mice were rendered tolerant of C57BL/6 alloantigens by in utero transplantation of C57BL/6 marrows. Postnatally, engrafted donor skins and leukocytes were examined for their MHC expression by quantitative real-time PCR and flow cytometry. Engrafted donor skins upregulated their MHC class I related gene transcripts after short-term (1~2 weeks) or long-term (>1 month) engraftment. This biological phenomenon was simultaneously associated with upregulation of TAP1 gene transcripts, suggesting an important role of TAP1 in the regulation of MHC class I pathway. The surface MHC class I molecules of H-2Kb in engrafted donor leukocytes consistently showed overexpression. Conclusively, the induction of allograft tolerance involved biological modifications of donor transplants. The overexpression of MHC class I within engrafted transplants of tolerant mice might be used as the tolerance biomarkers for identifying a state of graft tolerance.
ACCESSION #
100436712

 

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