Human renal cancer cells express a novel membrane-bound interleukin-15 that induces, in response to the soluble interleukin-15 receptor alpha chain, epithelial-to-mesenchymal transition. Khawam, K., Giron-Michel, J., Gu, Y., Perier, A., Giuliani, M., Caignard, A., Devocelle, A., Ferrini, S., Fabbi, M., Charpentier, B., Ludwig, A., Chouaib, S., Azzarone, B., & Eid, P. Cancer Res, 69(4):1561–9, February, 2009.
Paper abstract bibtex Although interleukin-15 (IL-15) is a powerful immunomodulatory factor that has been proposed for cancer immunotherapy, its intratumoral expression may be correlated with tumor progression and/or poor clinical outcome. Therefore, neoplasias potentially sensitive to immunotherapy should be checked for their IL-15 expression and function before choosing immunotherapy protocols. Primary human renal cancer cells (RCC) express a novel form of membrane-bound IL-15 (mb-IL-15), which displays three major original properties: (a) It is expressed as a functional membrane homodimer of 27 kDa, (b) it is shed in the extracellular environment by the metalloproteases ADAM17 and ADAM10, and (c) its stimulation by soluble IL-15 receptor alpha (s-IL-15Ralpha) chain triggers a complex reverse signal (mitogen-activated protein kinases, FAK, pMLC) necessary and sufficient to induce epithelial-mesenchymal transdifferentiation (EMT), a crucial process in tumor progression whose induction is unprecedented for IL-15. In these cells, complete EMT is characterized by a dynamic reorganization of the cytoskeleton with the subsequent generation of a mesenchymal/contractile phenotype (alpha-SMA and vimentin networks) and the loss of the epithelial markers E-cadherin and ZO-1. The retrosignaling functions are, however, hindered through an unprecedented cytokine/receptor interaction of mb-IL-15 with membrane-associated IL-15Ralpha subunit that tunes its signaling potential competing with low concentrations of the s-IL-15Ralpha chain. Thus, human RCC express an IL-15/IL-15R system, which displays unique biochemical and functional properties that seem to be directly involved in renal tumoral progression.
@article{khawam_human_2009,
title = {Human renal cancer cells express a novel membrane-bound interleukin-15 that induces, in response to the soluble interleukin-15 receptor alpha chain, epithelial-to-mesenchymal transition},
volume = {69},
issn = {1538-7445 (ELECTRONIC) 0008-5472 (LINKING)},
shorttitle = {Human renal cancer cells express a novel membrane-bound interleukin-15 that induces, in response to the soluble interleukin-15 receptor alpha chain, epithelial-to-mesenchymal transition},
url = {http://www.ncbi.nlm.nih.gov/pubmed/19190330},
abstract = {Although interleukin-15 (IL-15) is a powerful immunomodulatory factor that has been proposed for cancer immunotherapy, its intratumoral expression may be correlated with tumor progression and/or poor clinical outcome. Therefore, neoplasias potentially sensitive to immunotherapy should be checked for their IL-15 expression and function before choosing immunotherapy protocols. Primary human renal cancer cells (RCC) express a novel form of membrane-bound IL-15 (mb-IL-15), which displays three major original properties: (a) It is expressed as a functional membrane homodimer of 27 kDa, (b) it is shed in the extracellular environment by the metalloproteases ADAM17 and ADAM10, and (c) its stimulation by soluble IL-15 receptor alpha (s-IL-15Ralpha) chain triggers a complex reverse signal (mitogen-activated protein kinases, FAK, pMLC) necessary and sufficient to induce epithelial-mesenchymal transdifferentiation (EMT), a crucial process in tumor progression whose induction is unprecedented for IL-15. In these cells, complete EMT is characterized by a dynamic reorganization of the cytoskeleton with the subsequent generation of a mesenchymal/contractile phenotype (alpha-SMA and vimentin networks) and the loss of the epithelial markers E-cadherin and ZO-1. The retrosignaling functions are, however, hindered through an unprecedented cytokine/receptor interaction of mb-IL-15 with membrane-associated IL-15Ralpha subunit that tunes its signaling potential competing with low concentrations of the s-IL-15Ralpha chain. Thus, human RCC express an IL-15/IL-15R system, which displays unique biochemical and functional properties that seem to be directly involved in renal tumoral progression.},
number = {4},
journal = {Cancer Res},
author = {Khawam, K. and Giron-Michel, J. and Gu, Y. and Perier, A. and Giuliani, M. and Caignard, A. and Devocelle, A. and Ferrini, S. and Fabbi, M. and Charpentier, B. and Ludwig, A. and Chouaib, S. and Azzarone, B. and Eid, P.},
month = feb,
year = {2009},
keywords = {Antibodies, Cultured, Interleukin-15/*immunology Sodium Acetate/pharmacology Tetradecanoylphorbol Acetate/pharmacology Tumor Cells, Monoclonal/therapeutic use Carcinoma, Renal Cell/*immunology/pathology Carcinoma, Small Cell/immunology/pathology Cell Differentiation Cell Line},
pages = {1561--9},
}
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