Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from rat peripheral blood mononuclear cells (PBMCs)

ABSTRACT: The effect of cafeteria (CAF) diet in PBMC gene expression was analyzed in two inbred rat strains the Wistar Kyoto(WKY) and Lewis (LEW) rat PBMCs were isolated following a CAF or standard diet and subjected to whole genome expression analysis Rats from each strain were either fed with standard chow diet (n=5) or CAF (n=5). After 7 weeks of the indicated diet, rats were fasted for 9 hours, culled and PBMCs isolated from whole blood collected from the abdominal aorta

ORGANISM(S): Rattus norvegicus

SUBMITTER: Jacques Behmoaras

PROVIDER: E-GEOD-85167 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Objective: Apolipoprotein E (Apo E) is a multifunctional protein, originally described in the context of lipoprotein metabolism and cardiovascular disease. More recently, anti-inflammatory functions of ApoE have been documented. ApoE was studied in the context of several inflammatory disorders, but its role in the pathogenesis of acute organ rejection is unknown. In this study, we test the hypothesis that ApoE attenuates acute renal allograft rejection. Materials and methods: The Dark Agouti (DA) to Lewis (Lew) and the Brown Norway (BN) to Lew rat strain combinations were used to investigate fatal acute rejection. In addition, Fischer 344 (F344) kidneys were transplanted to Lew rats to study reversible acute rejection. Isograft recipients and untreated Lew rats were used as controls. ApoE mRNA expression was quantified in intravascular leukocytes accumulating in the blood vessels of renal grafts and in graft tissue. Apo E protein levels were assessed in blood plasma. To test the protective potential of ApoE, recipients of BN kidneys were treated with ApoE-mimetic peptide. Results: Intravascular graft leukocytes and renal tissue obtained from animals undergoing reversible acute rejection expressed increased levels of ApoE mRNA, whereas during fatal rejection, ApoE expression remained unchanged in the BN to Lew rat strain combination or was significantly reduced when DA rats were used as donors of the kidney. On the protein level, no changes in ApoE were seen in plasma. However, we do not know if local leukocytic ApoE expression results in increased ApoE concentrations inside graft blood vessels. Peptide treatment of allograft recipients reversed fatal rejection and significantly improved animal survival. Conclusions: ApoE plays a protective role in acute organ rejection. Further studies are needed to understand the exact mechanism how ApoE reverses acute rejection. dual-color balanced dye-swap design with 4 biological replicates, hybridized on 4 arrays

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Expression data from rat peripheral blood mononuclear cells (PBMCs)

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