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Mol Oncol. 2016 Dec;10(10):1585-1594. doi: 10.1016/j.molonc.2016.09.007. Epub 2016 Oct 14.

A pilot study exploring the molecular architecture of the tumor microenvironment in human prostate cancer using laser capture microdissection and reverse phase protein microarray.

Author information

1
Center for Applied Proteomics and Molecular Medicine, George Mason University, Manassas, VA, USA; Division of Experimental Oncology 2, CRO-IRCCS, National Cancer Institute, Aviano, Italy.
2
Division of Cancer Prevention and Control, University of Arizona Cancer Center, Tucson, AZ, USA.
3
Department of Surgical Oncology, CRO-IRCCS, National Cancer Institute, Aviano, Italy.
4
Center for Applied Proteomics and Molecular Medicine, George Mason University, Manassas, VA, USA.
5
Center for Applied Proteomics and Molecular Medicine, George Mason University, Manassas, VA, USA. Electronic address: mpierobo@gmu.edu.

Abstract

The cross-talk between tumor epithelium and surrounding stromal/immune microenvironment is essential to sustain tumor growth and progression and provides new opportunities for the development of targeted treatments focused on disrupting the tumor ecology. Identification of novel approaches to study these interactions is of primary importance. Using laser capture microdissection (LCM) coupled with reverse phase protein microarray (RPPA) based protein signaling activation mapping we explored the molecular interconnection between tumor epithelium and surrounding stromal microenvironment in 18 prostate cancer (PCa) specimens. Four specimen-matched cellular compartments (normal-appearing epithelium and its adjacent stroma, and malignant epithelium and its adjacent stroma) were isolated for each case. The signaling network analysis of the four compartments unraveled a number of molecular mechanisms underlying the communication between tumor cells and stroma in the context of the tumor microenvironment. In particular, differential expression of inflammatory mediators like IL-8 and IL-10 by the stroma cells appeared to modulate specific cross-talks between the tumor cells and surrounding microenvironment.

KEYWORDS:

Cross-talk; Kinase signaling; Laser capture microdissection; Prostate cancer; Reverse phase protein microarray; Tumor microenvironment

PMID:
27825696
PMCID:
PMC5423125
DOI:
10.1016/j.molonc.2016.09.007
[Indexed for MEDLINE]
Free PMC Article

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