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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Sharma, Rakesh Baladandayuthapani, Veerabhadran Chou, Tina Fowler, Nathan Delgado, David Rawal, Seema Zhang, Min Vega, Francisco Dong, Chen Davis, R. Eric Chu, Fuliang Park, Hyun Jun Kannan, Shibichakravarthy Neelapu, Sattva S. Nattamai, Durga Lin, Heather Y. Luong, Amber |
| Description | Country affiliation: United States Author Affiliation: Rawal S ( Division of Cancer Medicine, Department of Lymphoma and Myeloma, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.) |
| Abstract | The microenvironment of human follicular lymphoma (FL), an incurable B cell non-Hodgkin's lymphoma, is thought to play a major role in its pathogenesis and course. Microenvironmental cells of likely importance include follicular Th cells (TFH) and regulatory T cells (Tregs), and understanding their interactions with FL tumor cells is necessary to develop novel therapeutic strategies. We found that IL-4 and CD40L are expressed by intratumoral TFH and induce production of CCL17 and CCL22 by FL tumor cells. IL-4 alone induces only CCL17 but enhances stimulation by CD40L of both CCL17 and CCL22. Consistent with our in vitro results, mRNA transcripts of IL-4 correlated with CCL17, but not CCL22, in gene expression profiling studies of FL biopsies, whereas CD40L correlated with both CCL17 and CCL22. Tumor supernatants induced preferential migration of Tregs and IL-4-producing T cells rather than IFN-γ-producing T cells, and Abs to CCR4 significantly abrogated the migration of Tregs. Our results suggest that through two distinct mechanisms, intratumoral TFH induce production of CCL17 and CCL22 by FL tumor cells and facilitate active recruitment of Tregs and IL-4-producing T cells, which, in turn, may stimulate more chemokine production in a feed-forward cycle. Thus, TFH appear to play a major role in generating an immunosuppressive tumor microenvironment that promotes immune escape and tumor survival and growth. Our results provide novel insights into the cross talk among TFH, tumor cells, and Tregs in FL, and offer potential targets for development of therapeutic strategies to overcome immune evasion. |
| ISSN | 00221767 |
| e-ISSN | 15506606 |
| DOI | 10.4049/jimmunol.1201363 |
| Journal | The Journal of Immunology |
| Issue Number | 12 |
| Volume Number | 190 |
| Language | English |
| Publisher | The American Association of Immunologists |
| Publisher Date | 2013-06-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Lymphoma, Follicular Immunology Receptor Cross-talk T-lymphocytes, Helper-inducer Tumor Escape Tumor Microenvironment Blotting, Western Cell Separation Chemokine Ccl17 Metabolism Chemokine Ccl22 Enzyme-linked Immunosorbent Assay Flow Cytometry Gene Knockdown Techniques Immunohistochemistry Kaplan-meier Estimate Mortality Oligonucleotide Array Sequence Analysis Rna, Small Interfering Real-time Polymerase Chain Reaction Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Immunology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology |
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