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B-cell subpopulations from normal human secondary lymphoid tissues with specific gene expression profiles and phenotypes

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  • Hans Erik Johnsen, Danmark
  • Alexander Schmitz
  • Martin Perez Andres, Service of Cytometry & Department of Medicine, CICancer - University of Salamanca, Spain, Spanien
  • P Johansen
  • ,
  • Martin Bøgsted
  • Mette Nyegaard, Danmark
  • Anne Bukh, Danmark
  • Kirsten Fogd, Danmark
  • Alberto Orfao, Service of Cytometry & Department of Medicine, CICancer - University of Salamanca, Spain, Spanien
  • Karen Dybkær, Danmark
In order to improve insights into the B-cell biology and thereby B-cell myelomagenesis we have established a MSCNET standard for multiparametric flow cytometry (MFC) and cell sorting (FACS) for subsequent genetic analysis. The material analysed was fresh tonsils, blood and bone marrow. The method included homogenization, isolation of mononuclear cells, MFC and FACS sorting using multicolour fluorescence single tube panels.of antibodies against surface molecules as CD10/20/27/38/45, supplemented with tissue related antibodies. Isolated B-cell subpopulations were evaluated by morphological inspection and single gene expression analysis (qRT-PCR) for transcription factors as well as global gene expression profiling (GEP; GeneChip Human Exon 1.0 ST Array). For example for tonsils, based on the immunophenotypic presentation (including
CD3/44/CXCR4 in the panel), B-cell subsets were identified and sorted, naïve, centroblast, centrocyte, memory, and plasmablasts. The identity of the tonsillar subpopulations was verified using qRT-PCR and exon microarray GEP based on the used discriminative phenotypic markers as well as transcriptions factors BACH2, BCL6, PAX5, IRF4, P27, PRDM1 and XBP1. Globally, the B-cell subpopulations identified have distinct gene expression profiles reflecting their functions but also revealing genes with subpopulation specific exon splicing. In conclusion a combination of surface markers expressed antigens and gene expression analysis of B cell subsets confirm a strong methodology to be used in
myelomagenesis and evaluated as for prognostic information.
Udgivelsesår6 maj 2011
StatusUdgivet - 6 maj 2011
Begivenhed13th International Myeloma Workshop - Paris, Frankrig
Varighed: 3 maj 20116 maj 2011


Konference13th International Myeloma Workshop

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