Rattus norvegicus
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ABSTRACT:
PROVIDER: PRJNA139319 | ENA |
REPOSITORIES: ENA
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Project description:The goal is to identify new molecules implicated in tolerance, to determine the implication of these molecules in immune responses to transplantation by gene expression comparison of 27,088 individual rat genes between tolerated kidney allotransplant and syngeneic kidney transplant. In this study 27,088 individual rat genes expression from total mRNA of 3 tolerated allogeneic kidney transplants by anti-classII, were compared to 3 syngeneic kidney transplants at day 100 post transplantation.
2011-04-09 | E-GEOD-28474 | biostudies-arrayexpress
Project description:The goal is to identify new molecules implicated in tolerance, to determine the implication of these molecules in immune responses to transplantation by gene expression comparison of 27,088 individual rat genes between tolerated kidney allotransplant and syngeneic kidney transplant.
2011-04-09 | GSE28474 | GEO
Project description:The goal is to identify molecules involved in the accumulation of blood MDSCs in tolerant kidney allografted recipients when compared to syngeneic grafted recipients. In this study 27,088 individual rat genes expression from total mRNA of blood MDSCs from 3 tolerated allogeneic kidney transplanted recipient by anti-CD28, were compared to MDSCs from 3 syngeneic kidney transplanted recipient at day 100 post transplantation.
2011-04-13 | E-GEOD-28545 | biostudies-arrayexpress
Project description:Microarray analyses provide a powerful approach to identify gene expression alterations following kidney transplantation. However, the heterogeneity of human kidney transplant specimens and the variation in sample preparation precludes conclusions regarding the underlying mechanisms of the observed alterations. We used a well defined experimental rat kidney transplantation model with consistent transplant and sample preparation procedures to analyze genome wide changes in gene expression after syngeneic (sTX) and allogeneic transplantation (aTX) four days after transplantation. Both interventions were associated with dramatic changes in gene expression. Genes and Pathways related to immune response were extremely up regulated after aTX. Several of the up regulated genes have been described by other groups and we are able to proof this in one study. But several genes are reported for the first time to be up regulated in expression after renal aTX. The function of these genes in acute rejection process has to be evaluated. On the other hand the up regulation of regulatory or protective genes indicates that regulatory mechanism are activated after aTX trying to down regulate the immune response or protect the tissue against the immune system. The study is capable to serve as a representative study in aTX mediated gene expression by covering the known transcriptional changes reported by other groups and identification of novel markers and pathways. Further analysis of the duplicated datasets by other groups can help for a better understanding of the mechanisms mediated by acute rejection and thereby increase the therapeutic threatment. Experiment Overall Design: Male LewisâBrown-Norway (LBN) and Lewis (LEW) rats were used in the present study. All recipients were bilaterally nephrectomized immediately before donor kidney TX. In brief, the left kidney including ureter, renal artery, a piece of aorta and renal vein was transplanted into the recipient. For the allogeneic TX (aTX) model, kidneys of LBN-rats (n=5) were transplanted into LEW-rats and for the syngeneic TX (sTX) model kidneys from LBN-rats (n=5) were transplanted into LBN-rats. The LBN-into-Lewis model leads to marked histological changes typical for acute transplant rejection. The second kidney of the LBN-donors (n=5) served as controls.
2008-06-14 | E-GEOD-6497 | biostudies-arrayexpress
Project description:This study compared gene expression in murine bcr-abl positive acute lymphoblastic leukemia cells in vivo in allogeneic BMT recipients compared to syngneneic BMT recipients. Experiment Overall Design: The goal of the experiment was to compare gene expression in leukemia cells that were in either an allogeneic transplant (5 samples) or syngeneic transplant (5 samples) immune environment in vivo. The bone marrow transplant model involved preparation of C57BL/6 recipients with total body irradiation and 5-fluoruracil. These recipients were then infused IV with either allogeneic C3.SW marrow and spleen cells or syngeneic C57BL/6 marrow and spleen cells. The leukemia cells were mixed in with the marrow and spleen cells. After a few weeks (2-3) the C57BL/6 leukemia cells were purified by flow cytometry and passed into other freshly transplanted animals. After three serial transplants the leukemia cells were flow purified and RNA prepared. Leukemia was C57BL/6 background (cells contain the human p210 bcr/abl oncogenic fusion gene and also have a deletion in the Ink4a/Arf locus, see: Biology of Blood and Marrow Transplantation. 14:622-630, 2008).
2009-09-06 | E-GEOD-17497 | biostudies-arrayexpress
Project description:To investigate gene expression profile of medullary thymic epithelial cells with high surface density of MHC class II (mTEChigh), a murine parent into F1 hematopoietic stem cell transplantation model was administered. As recipient mice (B6xDBA/2)F1 (B6D2F1) were used that received either a syngeneic transplant from a (B6xDBA/2)F1 mouse or an allogeneic transplant from a B6 mouse, which leads to acute graft-versus-host disease (aGVHD). mTEChigh (CD45-EpCAM+Ly51-UEA1+MHCIIhigh) are sorted by FACS.
2012-12-20 | E-MEXP-3745 | biostudies-arrayexpress
Project description:The transcriptional profile of kidney organoid-based tissues resembled the gene signature observed in human kidney transplant rejection when transplanted into mice reconstituted with an allogeneic immune system.
2024-09-03 | GSE242885 | GEO
Project description:The frequency of delayed function of kidney transplants varies greatly and is associated with the quality of graft, donor age, and the duration of cold ischemia time. Body weight differences between donor and recipient can affect primary graft function. The underlying mechanism is poorly understood. Here, we have transplanted kidney grafts from commensurate body weight (L-WD) or reduced body weight (H-WD) donor rats into syngeneic or allogeneic recipients. 24 hours post-transplantation, serum creatinine level in H-WD recipients was significantly higher compared to that of L-WD recipients indicating impaired primary graft function. We detected a 10 fold higher transcription of IL-6 and dramatically increased tubular destruction in grafts from H-WD recipients. This was accompanied by decreased expression of genes associated with kidney function and an up-regulation of other genes such as cytochrome P450 isoforms, FosL and Trib3 as revealed by DNA microarray analysis. A single application of IL-6 into L-WD recipients is sufficient to impair primary graft function and to cause tubular damage. Whereas, immediate neutralization of IL-6 receptor signaling rescued primary graft function resulting in low serum creatinine levels, well-preserved kidney graft architecture and a normalized gene expression profile. These findings have strong clinical implication as anti-IL6R treatment of patients receiving grafts from lower-weight donors could be used to improve primary graft function. The dataset comprises eight samples divided into four sample groups. Each group represents rat kidneys collected after allogeneic transplantation under a certain condition and includes two biological replicates. The first group is characterized by a high body weight difference between donor and recipient, rats in the second group exhibit a low weight difference. Group three and four are similar to group one, but underwent an additional treatment with anti-IL6R mAb or prednisolone immediately after transplantation.
2010-04-08 | E-GEOD-15813 | biostudies-arrayexpress
Project description:To ensure safety tolerance induction protocols are accompanied by conventional immunosuppressive drugs IS. But IS such as calcineurin inhibitors CNI can interfere with tolerance induction. We investigated the effect of an additional CNI treatment on anti-CD4 mAb-induced tolerance induction upon rat kidney transplantation. Additional CNI treatment induced deteriorated graft function and chronic rejection characterised by alloantibody production, intragraft plasma cells and C3d deposition. Microarray analysis revealed enhanced intragraft expression of the B cell chemokine CXCL13 upon additional CNI treatment. In contrast PNOC, a B cell-related gene highly expressed in operational tolerant kidney transplant recipients, was decreased in grafts of anti-CD4 mAb+CsA-treated recipients suggesting an altered balance of B regulatory genes. Transient B cell depletion or transfer of Tregs three weeks after transplantation could inhibit intragraft B cell accumulation, alloantibody production and ameliorate chronic rejection. These data represent unexpected findings and should be taken into consideration when designing new clinical trials. To safe the benefit of CNI in controlling memory T cell responses we need strategies for a therapeutic optimization. We show here that early B cell depletion or transfer of Tregs may be one approach to arrest B cell accumulation, activation and graft destruction. comparative analysis of different immunosuppressive regimens on renal allograft gene expression versus untreated allografts
2013-09-01 | E-GEOD-40454 | biostudies-arrayexpress
Project description:C57/BL6 to C57/BL6; Balb/c to C57/BL6; Balb/c to C57/BL6 with anti CD80/86 mAb; Identificaton of gene expression profile in tolerizing murine cardiac allograft by co-stimulatory blockade. The induction of specific tolerance would be the ultimate achievement in transplant immunology, but the precise mechanisms of immunological tolerance remain largely unknown. Here, we investigated global gene expression analysis in tolerizing murine cardiac allografts by means of oligonucleotide microarrays. Tolerance induction was achieved in cardiac allografts from BALB/c to C57BL/6 mice by daily intraperitoneal injection of anti-CD80 and CD86 mAbs. Comparative analysis revealed 64 genes to be induced more extensively in the tolerizing than in the syngeneic isografts, and 16 genes than in the rejecting allografts. Two genes were specifically upregulated in the tolerizing allografts. In the tolerizing allografts there were induced marked expressions of a number of genes for proinflammatory factors, including interferon-gamma inducible cytokines and chemokines, as well as apoptosis-related genes which were also upregulated in the rejecting allografts. Moreover, these gene expression patterns continued to be upregulated more than 70 days post transplant. These results provide evidence that immunological tolerance can be induced and maintained in the presence of prominent proinflammatory gene expression in vivo.
2007-12-15 | E-GEOD-582 | biostudies-arrayexpress