molecular and functional characterizations of the association and interactions between nucleophosmin-anaplastic lymphoma kinase and type i insulin-like growth factor receptor

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ID: 250636
2013
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Abstract
Nucleophosmin-anaplastic lymphoma kinase (NPM-ALK) is aberrantly expressed in a subset of T cell lymphoma that commonly affects children and young adults. NPM-ALK possesses significant oncogenic potential that was previously documented using in vitro and in vivo experimental models. The exact mechanisms by which NPM-ALK induces its effects are poorly understood. We have recently demonstrated that NPM-ALK is physically associated with type I insulin-like growth factor receptor (IGF-IR). A positive feedback loop appears to exist between NPM-ALK and IGF-IR through which these two kinases interact to potentiate their effects. We have also found that a single mutation of the Tyr644 or Tyr664 residue of the C terminus of NPM-ALK to phenylalanine decreases significantly, but does not completely abolish, the association between NPM-ALK and IGF-IR. The purpose of this study was to determine whether the dual mutation of Tyr644 and Tyr664 abrogates the association and interactions between NPM-ALK and IGF-IR. We also examined the impact of this dual mutation on the oncogenic potential of NPM-ALK. Our results show that NPM-ALKY644,664F completely lacks association with IGF-IR. Importantly, we found that the dual mutation of Tyr644 and Tyr664 diminishes the oncogenic effects of NPM-ALK, including its ability to induce anchorage-independent colony formation and to sustain cellular transformation, proliferation, and migration. Furthermore, the association between NPM-ALK and IGF-IR through Tyr644 and Tyr664 appears to contribute to maintaining the stability of NPM-ALK protein. Our results provide novel insights into the mechanisms by which NPM-ALK induces its oncogenic effects through interactions with IGF-IR in this aggressive lymphoma.
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shi2013neoplasia:molecular Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Bin Shi;Deeksha Vishwamitra;J. Gabrielle Granda;Thomas Whitton;Ping Shi;Hesham M Amin
Journal ACS chemical neuroscience
Year 2013
DOI
10.1593/neo.122012
URL
http://www.sciencedirect.com/science/article/pii/S1476558613801406
Keywords
neoplasms Oncology including cancer and carcinogens tumors

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