Abstract:
:Sorafenib, a novel drug for metastatic renal cancer, has broad-spectrum activity against multiple tyrosine kinases, including Raf-1, vascular endothelial growth factor receptor and platelet-derived growth factor receptor. However, little is known about its effects on the immune system. In this report, we examine the effects of sorafenib on the proliferation and activation of human peripheral blood T cells, as well as its effects on T-cell-mediated immune response in mice. At concentrations similar to those used in patients, sorafenib inhibited the proliferation of primary human T cells in vitro. At more than 10 microM, sorafenib caused an irrecoverable inhibition of proliferation, even after drug withdrawal. In addition, sorafenib induced T-cell apoptosis at concentrations higher than 10 muM. sorafenib also caused G(0)/G(1) phase arrest, inhibition of CD25 and CD69 expression, interleukin-2 production and LCK phosphorylation in the T cells; all of these effects exhibited dose and time dependence. When tested against contact dermatitis in mice, sorafenib significantly reduced the ear swelling induced by picryl chloride. These findings suggest that sorafenib may cause the loss of T-cell immune response by inducing apoptosis and targeting LCK. This could potentially lead to immunosuppression in patients with cancer.
journal_name
Leukemiajournal_title
Leukemiaauthors
Zhao W,Gu YH,Song R,Qu BQ,Xu Qdoi
10.1038/leu.2008.58subject
Has Abstractpub_date
2008-06-01 00:00:00pages
1226-33issue
6eissn
0887-6924issn
1476-5551pii
leu200858journal_volume
22pub_type
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