Journal article
Proteome profiling of exosomes derived from human primary and metastatic colorectal cancer cells reveal differential expression of key metastatic factors and signal transduction components
H Ji, DW Greening, TW Barnes, JW Lim, BJ Tauro, A Rai, R Xu, C Adda, S Mathivanan, W Zhao, Y Xue, T Xu, HJ Zhu, RJ Simpson
Proteomics | Published : 2013
Abstract
Exosomes are small extracellular 40-100 nm diameter membrane vesicles of late endosomal origin that can mediate intercellular transfer of RNAs and proteins to assist premetastatic niche formation. Using primary (SW480) and metastatic (SW620) human isogenic colorectal cancer cell lines we compared exosome protein profiles to yield valuable insights into metastatic factors and signaling molecules fundamental to tumor progression. Exosomes purified using OptiPrep™ density gradient fractionation were 40-100 nm in diameter, were of a buoyant density ∼1.09 g/mL, and displayed stereotypic exosomal markers TSG101, Alix, and CD63. A major finding was the selective enrichment of metastatic factors (ME..
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Awarded by National Health & Medical Research Council of Australia (NHMRC)
Awarded by NHMRC
Funding Acknowledgements
This work was supported by the National Health & Medical Research Council of Australia (NH&MRC) program grant #487922 (R.J.S., D. W. G., J.H.). B.J.T. is supported by a University of Melbourne Research Scholarship. S. M. was supported by a NH&MRC Fellowship # 1016599. Analysis of proteomic data described in this work was supported by the Australian Proteomics Computational Facility funded by the NH&MRC grant #381413. This work was supported by funds from the Operational Infrastructure Support Program provided by the Victorian Government Australia. We acknowledge the Australian Cancer Research Foundation for providing funds to purchase the Orbitrap (TM) mass spectrometer.