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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Holmes, Susan He, Michael Xu, Tong Lee, Peter P. |
| Description | Author Affiliation: Holmes S ( Department of Statistics, Sequoia Hall, Stanford University, Stanford, CA 94305, USA. susan@stat.stanford.edu); |
| Abstract | The biological basis underlying differentiation of naive (NAI) T cells into effector (EFFE) and memory (MEM) cells is incompletely understood. Furthermore, whether NAI T cells serially differentiate into EFFE and then MEM cells (linear differentiation) or whether they concurrently differentiate into either EFFE or MEM cells (parallel differentiation) remains unresolved. We isolated NAI, EFFE, and MEM CD8(+) T cell subsets from human peripheral blood and analyzed their gene expression by using microarrays. We identified 156 genes that strongly differentiate NAI, EFFE, and MEM CD8(+) T cells; these genes provide previously unrecognized markers to help identify each cell type. Using several statistical approaches to analyze and group the data (standard heat-map and hierarchical clustering, a unique circular representation, multivariate analyses based on principal components, and a clustering method based on phylogenetic parsimony analysis), we assessed the lineage relationships between these subsets and showed that MEM cells have gene expression patterns intermediate between NAI and EFFE T cells. Our analysis suggests a common differentiation pathway to an intermediate state followed by a split into EFFE or MEM cells, hence supporting the parallel differentiation model. As such, conditions under which NAI T cells are activated may determine the magnitude of both EFFE and MEM cells, which arise subsequently. A better understanding of these conditions may be very useful in the design of future vaccine strategies to maximize MEM cell generation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 15 |
| Volume Number | 102 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2005-04-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | CD8-Positive T-Lymphocytes Immunology Metabolism Cell Differentiation Genetics Gene Expression Regulation Immunologic Memory Lymphocyte Activation Cytology Cell Line, Tumor Cells, Cultured Gene Expression Profiling Melanoma Oligonucleotide Array Sequence Analysis Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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