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Open AccessArticle

Reduced Expression of Sprouty1 Contributes to the Aberrant Proliferation and Impaired Apoptosis of Acute Myeloid Leukemia Cells

1
Department of Clinical and Biological Sciences, University of Turin, 10043 Turin, Italy
2
Department of Oncology, University of Turin, 10043 Turin, Italy
*
Author to whom correspondence should be addressed.
These authors contributed equally to this manuscript.
These authors contributed equally to this manuscript.
J. Clin. Med. 2019, 8(7), 972; https://doi.org/10.3390/jcm8070972
Received: 10 May 2019 / Revised: 2 July 2019 / Accepted: 2 July 2019 / Published: 4 July 2019
(This article belongs to the Section Hematology)
In most of the acute myeloid leukemia patients there is an aberrant tyrosine kinase activity. The prototype of Sprouty proteins was originally identified in Drosophila melanogaster as antagonists of Breathless, the mammalian ortholog of fibroblast growth factor receptor. Usually, SPRY family members are inhibitors of RAS signaling induced by tyrosine kinases receptors and they are implicated in negative feedback processes regulating several intracellular pathways. The present study aims to investigate the role of a member of the Sprouty family, Sprouty1, as a regulator of cell proliferation and growth in patients affected by acute myeloid leukemia. Sprouty1 mRNA and protein were both significantly down-regulated in acute myeloid leukemia cells compared to the normal counterpart, but they were restored when remission is achieved after chemotherapy. Ectopic expression of Sprouty1 revealed that it plays a key role in the proliferation and apoptotic defect that represent a landmark of the leukemic cells. Our study identified Sprouty1 as negative regulator involved in the aberrant signals of adult acute myeloid leukemia. Furthermore, we found a correlation between Sprouty1 and FoxO3a delocalization in acute myeloid leukemia (AML) patients at diagnosis, suggesting a multistep regulation of RAS signaling in human cancers. View Full-Text
Keywords: Sprouty1; acute myeloid leukemia (AML); FoxO3a Sprouty1; acute myeloid leukemia (AML); FoxO3a
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Rosso, V.; Panuzzo, C.; Petiti, J.; Carturan, S.; Dragani, M.; Andreani, G.; Fava, C.; Saglio, G.; Bracco, E.; Cilloni, D. Reduced Expression of Sprouty1 Contributes to the Aberrant Proliferation and Impaired Apoptosis of Acute Myeloid Leukemia Cells. J. Clin. Med. 2019, 8, 972.

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