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Comparison of gene expression profiles by CD3+CD4+ thymocytes derived from fetal and adult hematopoietic stem cells

ABSTRACT: Human fetal and adult hematopoietic stem cells (HSC) were obtained from fetal liver, fetal bone marrow (BM), and adult BM. These were injected into human fetal thymic implants in SCID-hu Thy/Liv mice (4-6 separate mice per HSC donor) and allowed to mature into single positive CD4+ (SP4) thymocytes over the course of 7-8 weeks. SP4 thymocytes from injected stem cells were subsequently sort-purified from thymic implants and gene expression was performed. HSC from fetal (age 18-22 gestational weeks) and adult (age: 19-43 year old) HLA-A2+ donors were obtained from different tissues. After injection into human fetal thymic implants (SCID-hu Thy/Liv HLA-A2-) the cells were allowed to mature into thymocytes and sorted on the basis of HLA-A2+ expression and CD3+CD4+ (SP4) expression. 3 separate thymic implants were analyzed for each group.

ORGANISM(S): Homo sapiens

SUBMITTER: Jeff Mold

PROVIDER: E-GEOD-25085 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Comparison of gene expression profiles by CD3+CD4+ thymocytes derived from fetal and adult hematopoietic stem cells

Project description:Human fetal and adult hematopoietic stem cells (HSC) were obtained from fetal liver, fetal bone marrow (BM), and adult BM. These were injected into human fetal thymic implants in SCID-hu Thy/Liv mice (4-6 separate mice per HSC donor) and allowed to mature into single positive CD4+ (SP4) thymocytes over the course of 7-8 weeks. SP4 thymocytes from injected stem cells were subsequently sort-purified from thymic implants and gene expression was performed.

2010-12-17 | GSE25085 | GEO

Gene Expression Profile during human CD4+ T cell differentiation

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Expression data from CD4 single positive thymocyte subsets from C57BL/6 mice of 6-8 wks of age

Project description:After positive selection in the thymus, the newly generated single positive (SP) thymocytes are phenotypically and functionally immature and undergo apoptosis upon antigen stimulation. In the thymic medullary microenvironment, SP cells progressively acquire immunocompetence. Negative selection to remove autoreactive T cells also occur at this stage. We have defined four subsets of CD4 SP, namely, SP1, SP2, SP3, and SP4 that follow a functional maturation program and a sequential emergence during mouse ontogeny. We used microarray to detail the global programm of gene expression during the maturation of murine CD4 single positive thymocytes Four subsets of CD4+CD8-CD25-NK1.1- thymocytes from C57BL/6 mice of 6-8 wks of age were purified for RNA extraction and hybridization on Affymetrix microarrays, namely, SP1 (Qa-2-6C10+CD69+), SP2 (Qa-2-6C10-CD69+), SP3 (Qa-2-6C10-CD69-), SP4 (Qa-2+6C10-CD69-).

2012-02-13 | E-GEOD-30083 | biostudies-arrayexpress

Transcription profiling of human fetal thymocytes and circulating naive T cells

Project description:Subpopulations of human fetal thymocyte and circulating naÃ¯ve T cells were obtained through FACS sorting, including CD3-CD4+CD8- intrathymic T progenitor cells (ITTP), CD3intCD4+CD8+ "double positive" thymocytes (DP), CD3highCD4+CD8- "single positive" thymocytes (SP4), CD3+CD4+CD8-CD45RA+CD62L+ naÃ¯ve T cells from cord blood (CB4+), and CD3+CD4+CD8-CD45RA+CD62L+ naÃ¯ve T cells from adult blood (AB4+).

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Expression data from CD4 single positive thymocyte subsets from C57BL/6 mice of 6-8 wks of age

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Transcriptome analysis of murine thymocytes reveals age-associated changes in thymic gene expression

Project description:The decline in adaptive immunity, naïve T-cell output and a contraction in the peripheral T cell receptor (TCR) repertoire with age are largely attributable to thymic involution and the loss of critical cytokines and hormones within the thymic microenvironment. To assess the molecular changes associated with this loss of thymic function, we used cDNA microarray analyses to examine the transcriptomes of thymocytes from mice of various ages ranging from very young (1 month) to very old (24 months). Genes associated with various biological and molecular processes including oxidative phosphorylation, T- and B- cell receptor signaling and antigen presentation were observed to significantly change with thymocyte age. These include several immunoglobulin chains, chemokine and ribosomal proteins, annexin A2, vav 1 and several S100 signaling proteins. The increased expression of immunoglobulin genes in aged thymocytes could be attributed to the thymic B cells which were found to be actively producing IgG and IgM antibodies. Upon further examination, we found that purified thymic T cells derived from aged but not young thymi also exhibited IgM on their cell surface suggesting the possible presence of auto-antibodies on the surface thymocytes with advancing age. These studies provide valuable insight into the cellular and molecular mechanisms associated with thymic aging. Keywords: Thymocytes, thymic involution, aging, time course

2009-05-05 | GSE15945 | GEO

Thymic epithelial cells induce formation of mesenchymal network structure after abrogation of thymic crosstalk

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2017-08-19 | GSE60520 | GEO

AHR mediated gene expression changes in immature DN thymocytes and thymic emigrants

Project description:Effect of an immunosupressive dose of TCDD, a ligand for the aryl hydrocarbon receptor, on the gene expression profile of fetal DN thymocytes and thymic emigrants

2008-11-25 | GSE13720 | GEO

Transcriptome analysis of murine thymocytes reveals age-associated changes in thymic gene expression

2009-05-05 | E-GEOD-15945 | biostudies-arrayexpress

Transcription profiling of mouse fetal thymic organ culture BDC2.5 CD4+CD8+ thymocytes from B6g7 or NOD strain backgrounds following addition of the BDC mimotope peptide

Project description:Fetal thymic organ culture (FTOC) DC2.5 CD4+CD8+ thymocytes from B6g7 or NOD background. 0 or 16 hour after addition of the BDC mimitope

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