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2015 ; 75
(11
): 2151-8
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gab.com Text
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English Wikipedia
Tumor-induced pressure in the bone microenvironment causes osteocytes to promote
the growth of prostate cancer bone metastases
#MMPMID25855383
Sottnik JL
; Dai J
; Zhang H
; Campbell B
; Keller ET
Cancer Res
2015[Jun]; 75
(11
): 2151-8
PMID25855383
show ga
Cross-talk between tumor cells and their microenvironment is critical for
malignant progression. Cross-talk mediators, including soluble factors and direct
cell contact, have been identified, but roles for the interaction of physical
forces between tumor cells and the bone microenvironment have not been described.
Here, we report preclinical evidence that tumor-generated pressure acts to modify
the bone microenvironment to promote the growth of prostate cancer bone
metastases. Tumors growing in mouse tibiae increased intraosseous pressure.
Application of pressure to osteocytes, the main mechanotransducing cells in bone,
induced prostate cancer growth and invasion. Mechanistic investigations revealed
that this process was mediated in part by upregulation of CCL5 and matrix
metalloproteinases in osteocytes. Our results defined the critical contribution
of physical forces to tumor cell growth in the tumor microenvironment, and they
identified osteocytes as a critical mediator in the bone metastatic niche.