RGD Reference Report - Tumor necrosis factor-beta is associated with thymic apoptosis during acute rejection. - Rat Genome Database

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Tumor necrosis factor-beta is associated with thymic apoptosis during acute rejection.

Authors: Yamaguchi, Y  Okabe, K  Miyanari, N  Matsumura, F  Ichiguchi, O  Akizuki, E  Matsuda, T  Liang, J  Ohshiro, H  Miyayama, Y  Yamada, S  Mori, K  Ogawa, M 
Citation: Yamaguchi Y, etal., Transplantation. 1998 Oct 15;66(7):894-902.
RGD ID: 1580413
Pubmed: PMID:9798700   (View Abstract at PubMed)

BACKGROUND: Intrathymic events undergoing allograft rejection remain undefined. The present study investigated the role of tumor necrosis factor-beta on acute thymic involution in rat hepatic allograft recipients during rejection. METHODS: Apoptosis and cellular phenotypic changes in the thymus were studied after hepatic transplantation. RESULTS: Thymocytes in both the medulla and cortex were sparse during acute rejection. Phenotypically, CD4+CD8+ T cells decreased significantly, whereas there were relative increases in CD4-CD8-, CD4+CD8-, and CD4-CD8+ T cells in untreated allograft recipients. Additionally, thymic apoptosis was found by in situ DNA end labeling and electron microscopy. Apoptotic cells were predominantly distributed in the cortex. Biologic lymphotoxin (tumor necrosis factor-beta)/tumor necrosis factor-alpha cytotoxic activity in the serum was significantly increased in untreated hepatic allograft recipients. Tumor necrosis factor-beta mRNA was detected in untreated allograft livers, and intraperitoneal administration of recombinant human tumor necrosis factor-beta induced extensive apoptosis of thymocytes in vivo. In contrast, no significant thymic involution was observed in donor-specific blood transfusion-treated allograft and isograft recipients. Intraperitoneal administration of rabbit anti-human tumor necrosis factor-beta polyclonal antibody or recombinant human interleukin-10 inhibited thymic apoptosis in untreated hepatic allograft recipients. CONCLUSIONS: Allograft rejection, but not donor-specific transfusion-induced immunologic unresponsiveness, is associated with thymic involution, a process that may be mediated by tumor necrosis factor-beta.

Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
positive regulation of apoptotic process  IMP 1580413 RGD 

Phenotype Annotations    Click to see Annotation Detail View

Mammalian Phenotype

TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
abnormal response to transplant  IDA 1580413 RGD 
Objects Annotated

Genes (Rattus norvegicus)
Lta  (lymphotoxin alpha)


Additional Information