Abstract:
:There is increased production of plasmacytoid dendritic cells (pDCs) in the bone marrow (BM) of multiple myeloma (MM) patients and these favor Th22 cell differentiation. Here, we found that the frequency of interleukin (IL)-22+IL-17-IL-13+ T cells is significantly increased in peripheral blood (PB) and BM of stage III and relapsed/refractory MM patients compared with healthy donors and patients with asymptomatic or stage I/II disease. Th22 cells cloned from the BM of MM patients were CCR6+CXCR4+CCR4+CCR10- and produced IL-22 and IL-13 but not IL-17. Furthermore, polyfunctional Th22-Th2 and Th22-Th1 clones were identified based on the co-expression of additional chemokine receptors and cytokines (CRTh2 or CXCR3 and IL-5 or interferon gamma [IFNγ], respectively). A fraction of MM cell lines and primary tumors aberrantly expressed the IL-22RA1 and IL-22 induced STAT-3 phosphorylation, cell growth, and resistance to drug-induced cell death in MM cells. IL-13 treatment of normal BM mesenchymal stromal cells (MSCs) induced STAT-6 phosphorylation, adhesion molecule upregulation, and increased IL-6 production and significantly favored MM cell growth compared with untreated BM MSCs. Collectively, our data show that increased frequency of IL-22+IL-17-IL-13+ T cells correlates with poor prognosis in MM through IL-22 and IL-13 protumor activity and suggest that interference with IL-22 and IL-13 signaling pathways could be exploited for therapeutic intervention.
journal_name
Oncoimmunologyjournal_title
Oncoimmunologyauthors
Di Lullo G,Marcatti M,Heltai S,Brunetto E,Tresoldi C,Bondanza A,Bonini C,Ponzoni M,Tonon G,Ciceri F,Bordignon C,Protti MPdoi
10.1080/2162402X.2015.1005460subject
Has Abstractpub_date
2015-02-03 00:00:00pages
e1005460issue
5eissn
2162-4011issn
2162-402Xpii
1005460journal_volume
4pub_type
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