Unknown,Transcriptomics,Genomics,Proteomics

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Follicular helper T cell signature in Type 1 Diabetes

ABSTRACT: This study set out to examine CD4 T cell differentiation in a mouse model of diabetes based on transgenic expression of ovalbumin under the control of the rat insulin promoter and co-expression of the DO11.10 transgene (DO11 x rip-mOVA mice). The transcriptome of T cells isolated from the pancreatic lymph nodes (lymph nodes draining the site of self antigen expression) was compared with that of T cells isolated from inguinal lymph nodes (non-draining lymph nodes). T cells were sorted based on expression of CD4, DO11.10 TCR (KJ-126), CD25 and CD69. Primary cells from 6 week old DO11 x rip-mOVA mice were isolated ex-vivo from the pancreatic lymph nodes or inguinal lymph nodes. Cells were sorted by flow cytometry using antibodies to CD4, DO11.10 TCR (KJ-126+), CD25 and CD69. 3-6 replicates were collected per experimental group with each replicate deriving from 14 mice. RNA was isolated using the RNeasy micro kit (Qiagen).

ORGANISM(S): Mus musculus

SUBMITTER: Lucy Walker

PROVIDER: E-GEOD-62104 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Expression data from mouse tumor-specific CD4+ T cells The central role of tumor-specific Th1 cells in fighting cancer is becoming increasingly appreciated. However, little is known about how these cells are generated in vivo. Here, we used flow cytometry and gene expression microarrays to characterize the primary activation and Th1 differentiation of naïve tumor-specific CD4+ T cells in a mouse model for cancer immunosurveillance. We took advantage of T cell receptor-transgenic mice where CD4+ T cells recognize a tumor-specific antigen secreted by the major histocompatibility complex (MHC) class II-negative MOPC315 myeloma. Cancer cells were injected subcutaneously and T cell activation was analyzed in draining lymph nodes and at the incipient tumor site at day +8. After activation and migration to the incipient tumor site, tumor-specific CD4+ T cells had 29 up-regulated molecules (CD2, CD5, CD11a, CD18, CD25, CD28, CD44, CD45, CD49d, CD51, CD54, CD69, CD71, CD83, CD86, CD90, CD95, CD102, CD122, CD153, CD166, CD200, CD249, CD254, CD274, CD279, Ly6C, MHC class I, and CCR7) and 5 down-regulated molecules (CD27, CD31, CD45RB, CD62L, and CD126) on the surface. The activated CD4+ T cells produced interferon , a cytokine consistent with Th1 polarization, and also interleukin 2 (IL-2), IL-3, IL-10, and tumor necrosis factor . Activation of naïve tumor-specific CD4+ T cells in draining lymph node resulted in the up-regulation of 609 genes and down-regulation of 284 genes. Bioinformatics analysis of genes differentially expressed identified functional pathways related to tumor-specific Th1 cell activation. This study may represent a useful resource to guide the development of Th1-based immunotherapy for cancer. TCR-transgenic SCID mice (n = 12-15) were injected s.c. on the flank with 10(5) MOPC315 cells suspended in 250 µl ice-cold growth factor-reduced Matrigel. At day +8, draining axillary LN were dissected out and pooled, single-cell suspensions were made and staining with mAb was carried out. Activated tumor-specific CD4+ GB113+ T cells were sorted by FACSAria (≥ 95% pure) in three independent experiments. Naïve tumor-specific CD4+ control T cells were obtained from pooled LN from naive TCR-transgenic SCID mice and treated identically in two independent experiments.

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Follicular helper T cell signature in Type 1 Diabetes

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