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- W2145662549 abstract "Non-manipulated inbred mouse strains constitutes an interesting model-system for in vivo studies on thymus ontogeny due to the possibility to observe the molecular events of the thymocyte maturation. In previous studies, using RT-PCR method, we have found that several immune system genes such as interleukins and MHC are differentially expressed during ontogeny of the thymus whose genes act as modulators of T-cell differentiation. To determine which other genes are modulated on a large-scale basis, we measured the levels of mRNA expression in mouse fetal thymus (14–17 days of gestation) by hybridization with cDNA microarrays containing 1,576 cDNA sequences derived from the IMAGE MTB library. T-cell maturation was monitored by detection of the T-cell receptor beta TRBV8.1-BD2.1 rearranged DNA segment. Each developmental phase of thymus, displayed a characteristic expression profile, as evaluated by the Cluster and Tree-View softwares. Genes differentially and significantly expressed were selected on the basis of significance analysis of the microarray data (SAM program). With the reclustering of only significantly expressed genes, it was possible to characterize the phases of thymus ontogeny, based on the differential profile of expression. Our method provided the detection of genes implicated in the cell signaling, such as the hematopoietic cell signal transducer gene, genes implicated in T-cell calcium influx (tyrosine phosphatase) and calcium signaling proteins (vesicle transport binding protein 3, proline rich Gla, casein kinase alpha 1 and Down syndrome homolog protein 1) and a gene important for the protein transport, including T-cell receptors chains, towards the cell membrane (Golgi SNAP receptor complex member 2). The results demonstrate that the cDNA microarray used to explore the gene expression was useful for understanding the modulation of several cell-signaling genes, including the calcium cascade pathway, which is important for individual stages of T-cell maturation and control of anergy during thymus ontogeny." @default.
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- W2145662549 date "2005-05-01" @default.
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- W2145662549 title "Hybridization signatures during thymus ontogeny reveals modulation of genes coding for T-cell signaling proteins" @default.
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- W2145662549 doi "https://doi.org/10.1016/j.molimm.2004.09.031" @default.
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