Role of SHP2 phosphatase in KIT-induced transformation: identification of SHP2 as a druggable target in diseases involving oncogenic KIT

Author:

Mali Raghuveer Singh1,Ma Peilin1,Zeng Li-Fan2,Martin Holly1,Ramdas Baskar1,He Yantao2,Sims Emily1,Nabinger Sarah1,Ghosh Joydeep1,Sharma Namit3,Munugalavadla Veerendra4,Chatterjee Anindya1,Li Shuo1,Sandusky George5,Craig Andrew W.3,Bunting Kevin D.6,Feng Gen-Sheng7,Chan Rebecca J.1,Zhang Zhong-Yin2,Kapur Reuben12

Affiliation:

1. Department of Pediatrics, Herman B. Wells Center for Pediatric Research and

2. Department of Biochemistry & Molecular Biology, Indiana University School of Medicine, Indianapolis, IN;

3. Department of Biochemistry, Queen's University, Kingston, ON;

4. Cancer Immunotherapy & Hematology, Genentech, South San Francisco, CA;

5. Department of Pathology, Indiana University School of Medicine, Indianapolis, IN;

6. Division of Hematology-Oncology, Emory University School of Medicine, Atlanta, GA; and

7. Department of Pathology, University of California, San Diego, La Jolla, CA

Abstract

Abstract Intracellular mechanism(s) that contribute to promiscuous signaling via oncogenic KIT in systemic mastocytosis and acute myelogenous leukemia are poorly understood. We show that SHP2 phosphatase is essential for oncogenic KIT-induced growth and survival in vitro and myeloproliferative disease (MPD) in vivo. Genetic disruption of SHP2 or treatment of oncogene-bearing cells with a novel SHP2 inhibitor alone or in combination with the PI3K inhibitor corrects MPD by disrupting a protein complex involving p85α, SHP2, and Gab2. Importantly, a single tyrosine at position 719 in oncogenic KIT is sufficient to develop MPD by recruiting p85α, SHP2, and Gab2 complex to oncogenic KIT. Our results demonstrate that SHP2 phosphatase is a druggable target that cooperates with lipid kinases in inducing MPD.

Publisher

American Society of Hematology

Subject

Cell Biology,Hematology,Immunology,Biochemistry

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