International Immunology Advance Access published online on March 3, 2005
International Immunology, doi:10.1093/intimm/dxh220
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1 Department of Immunotechnology, Lund University, PO Box 7031, S-220 07 Lund, Sweden
* To whom correspondence should be addressed. Dendritic cells (DCIs) possess a potent ability to modulate and activate specific T-cell responses to allergens, which play a pivotal role in allergic inflammation by secreting cytokines and other mediators. However, the molecular mechanisms by which allergen-challenged DCs regulate specific T-cell responses are still not well characterized. This study aims at elucidating the molecular mechanisms underlying the DC-T-cell interaction during an allergic immune response to grass pollen, using a genomic and functional approach. Transcriptional analysis was performed on grass allergen Phleum pratense-stimulated DCs and on autologous memory CD4+ T cells co-cultured with allergen-challenged DCs from healthy and allergic donors. DCs from the allergic donors were potent inducers of T-cell proliferation and Th2 polarization, as demonstrated by high IL-4, IL-5 and IL-13, and low IFN- *These authors contributed equally to the experimental work of this article.
Received December 17, 2004
Accepted January 12, 2005
Article
Genomic and functional delineation of dendritic cells and memory T cells derived from grass pollen-allergic patients and healthy individuals
2 Department of Immunotechnology, Lund University, PO Box 7031, S-220 07 Lund, Sweden; SIK, Swedish Institute for Food and Biotechnology, S-223 70 Lund, Sweden
3 Department of Immunotechnology, Lund University, PO Box 7031, S-220 07 Lund, Sweden; Department of Clinical Pharmacology, Lund University Hospital, S-221 85 Lund, Sweden
4 Department of Clinical Pharmacology, Lund University Hospital, S-221 85 Lund, Sweden
5 Department of Otorhinolaryngology, Lund University Hospital, S-221 85 Lund, Sweden
Carl A. K. Borrebaeck, E-mail: carl.borrebaeck{at}immun.lth.se
Abstract 
production. A gradual up-regulation of activation markers on both DCs and T cells was evident during the co-culture period, demonstrating an educational element of the DC-T-cell interaction. The global transcriptional analysis revealed a differential gene regulation in DCs and T cells derived from allergic donors after stimulation with allergen, as compared with the healthy donors. Peripheral memory CD4+ T cells from healthy and allergic donors also responded differently after stimulation with allergen-loaded DCs with respect to cytokine production, proliferation, surface marker expression and gene transcription. We found up-regulated genes involved in Th2 cell biology, such as genes important for homing, adhesion, signaling and transcription, in addition to genes previously not described in the context of allergy. The panel of differentially expressed genes in the allergic group will form the basis for an increased understanding of the molecular mechanisms in allergy.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  A. Bosco, K. L. McKenna, C. J. Devitt, M. J. Firth, P. D. Sly, and P. G. Holt Identification of novel th2-associated genes in T memory responses to allergens. J. Immunol., April 15, 2006; 176(8): 4766 - 4777. [Abstract] [Full Text] [PDF]
|
|