GIFT4 fusokine converts leukemic B cells into immune helper cells
Journal of Translational Medicine, ISSN: 1479-5876, Vol: 14, Issue: 1, Page: 106
2016
- 7Citations
- 14Captures
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Metrics Details
- Citations7
- Citation Indexes7
- CrossRef7
- Captures14
- Readers14
- 14
Article Description
Background: Chronic lymphocytic leukemia (CLL) remains incurable with standard therapy, and is characterized by excessive expansion of monoclonal abnormal mature B cells and more regulatory immune properties of T cell compartment. Thus, developing novel strategies to enhance immune function merits further investigation as a possible therapy for CLL. Methods: We generated a fusion cytokine (fusokine) arising from the combination of human GM-CSF and IL-4 (named GIFT4). Primary CLL cells were treated with GIFT4 or GM-CSG and IL-4 in vitro. GIFT4-triggered STAT5 signaling in CLL cells was examined by Western blot. The phenotype and secretome of GIFT4-treated CLL cells (GIFT4-CLL cells), and the immune stimulatory function of GIFT4-CLL cells on autologous T cells were analyzed by flow cytometry and luminex assay. Results: GIFT4-CLL up-regulated the expression of co-stimulatory molecules CD40, CD80 and CD86 and adhesion molecule CD54. GIFT4-CLL cells secreted IL-1β, IL-6, ICAM-1 and substantial IL-2 relative to unstimulated CLL cells. GIFT4 treatment led to JAK1, JAK2 and JAK3-mediated hyper-phosphorylation of STAT5 in primary CLL cells, which is essential for GIFT4-triggered conversion of CLL cells. GIFT4-CLL cells directly propelled the expansion of autologous IFN-γ-producing CD314 cytotoxic T cells in vitro, and that these could lyse autologous CLL cells. Furthermore, administration of GIFT4 protein promoted the expansion of human T cells in NOD-scid IL2Rγ immune deficient mice adoptively pre-transferred with peripheral blood mononuclear cells from subjects with CLL. Conclusion: GIFT4 has potent capability to converts primary CLL cells into APC-like immune helper cells that initiate a T cell driven anti-CLL immune response.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84965031013&origin=inward; http://dx.doi.org/10.1186/s12967-016-0865-1; http://www.ncbi.nlm.nih.gov/pubmed/27118475; https://translational-medicine.biomedcentral.com/articles/10.1186/s12967-016-0865-1; https://dx.doi.org/10.1186/s12967-016-0865-1
Springer Science and Business Media LLC
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