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Aberrant expression of the Th2 cytokine IL-21 in Hodgkin lymphoma cells regulates STAT3 signaling and attracts Treg cells via regulation of MIP-3α
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| Zeitschriftentitel: | Blood |
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| Personen und Körperschaften: | , , , , , , , , , |
| In: | Blood, 112, 2008, 8, S. 3339-3347 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Society of Hematology
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| Schlagwörter: |
| Zusammenfassung: | <jats:title>Abstract</jats:title> <jats:p>The malignant Hodgkin/Reed-Sternberg (HRS) cells of classical Hodgkin lymphoma (HL) are derived from mature B cells, but have lost a considerable part of the B cell–specific gene expression pattern. Consequences of such a lineage infidelity for lymphoma pathogenesis are currently not defined. Here, we report that HRS cells aberrantly express the common cytokine-receptor γ-chain (γc) cytokine IL-21, which is usually restricted to a subset of CD4+ T cells, and the corresponding IL-21 receptor. We demonstrate that IL-21 activates STAT3 in HRS cells, up-regulates STAT3 target genes, and protects HRS cells from CD95 death receptor–induced apoptosis. Furthermore, IL-21 is involved in up-regulation of the CC chemokine macrophage-inflammatory protein-3α (MIP-3α) in HRS cells. MIP-3α in turn attracts CCR6+CD4+CD25+FoxP3+CD127lo regulatory T cells toward HRS cells, which might favor their immune escape. Together, these data support the concept that aberrant expression of B lineage–inappropriate genes plays an important role for the biology of HL tumor cells.</jats:p> |
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| Umfang: | 3339-3347 |
| ISSN: |
0006-4971
1528-0020 |
| DOI: | 10.1182/blood-2008-01-134783 |