The immune receptor Tim-3 acts as a trafficker in a Tim-3/galectin-9 autocrine loop in human myeloid leukemia cells

The immune receptor Tim-3 is often highly expressed in human acute myeloid leukemia (AML) cells where it acts as a growth factor and inflammatory receptor. Recently, it has been demonstrated that Tim-3 forms an autocrine loop with its natural ligand galectin-9 in human AML cells. However, the pathop...

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Bibliographic Details
Published in:Oncoimmunology 2016-07, Vol.5 (7), p.e1195535-e1195535
Main Authors: Gonçalves Silva, Isabel, Rüegg, Laura, Gibbs, Bernhard F., Bardelli, Marco, Fruehwirth, Alexander, Varani, Luca, Berger, Steffen M., Fasler-Kan, Elizaveta, Sumbayev, Vadim V.
Format: Article
Language:English
Subjects:
Acute myeloid leukemia
galectin-9
Original Research
Tim-3
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Summary:The immune receptor Tim-3 is often highly expressed in human acute myeloid leukemia (AML) cells where it acts as a growth factor and inflammatory receptor. Recently, it has been demonstrated that Tim-3 forms an autocrine loop with its natural ligand galectin-9 in human AML cells. However, the pathophysiological functions of Tim-3 in human AML cells remain unclear. Here, we report for the first time that Tim-3 is required for galectin-9 secretion in human AML cells. However, this effect is cell-type specific and was found so far to be applicable only to myeloid (and not, for example, lymphoid) leukemia cells. We concluded that AML cells might use Tim-3 as a trafficker for the secretion of galectin-9 which can then be possibly used to impair the anticancer activities of cytotoxic T cells and natural killer (NK) cells.
ISSN:2162-4011
2162-402X
2162-402X
DOI:10.1080/2162402X.2016.1195535