Exercise modulation of the host-tumor interaction in an orthotopic model of murine prostate cancer

被引:103
|
作者
Jones, Lee W. [1 ]
Antonelli, Jodi
Masko, Elizabeth M.
Broadwater, Gloria
Lascola, Christopher D.
Fels, Diane
Dewhirst, Mark W.
Dyck, Jason R. B. [2 ,3 ]
Nagendran, Jeevan [2 ,3 ]
Flores, Catherine T.
Betof, Allison S.
Nelson, Erik R.
Pollak, Michael [4 ,5 ]
Dash, Rajesh C.
Young, Martin E. [6 ]
Freedland, Stephen J. [7 ]
机构
[1] Duke Univ, Med Ctr, Duke Canc Inst, Durham, NC 27710 USA
[2] Univ Alberta, Cardiovasc Res Ctr, Edmonton, AB, Canada
[3] Univ Alberta, Mazankowski Alberta Heart Inst, Edmonton, AB, Canada
[4] McGill Univ, Dept Oncol, Montreal, PQ, Canada
[5] McGill Univ, Lady Davis Res Inst, Montreal, PQ, Canada
[6] Univ Alabama Birmingham, Birmingham, AL USA
[7] Durham VA Med Ctr, Durham, NC USA
关键词
exercise; prostrate cancer; PHYSICAL-ACTIVITY; NEGATIVE REGULATOR; PROGRESSION; GROWTH;
D O I
10.1152/japplphysiol.01575.2011
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Jones LW, Antonelli J, Masko EM, Broadwater G, Lascola CD, Fels D, Dewhirst MW, Nagendran JR, Flores CT, Betof AS, Nelson ER, Pollak M, Dash RC, Young ME, Freedland SJ. Exercise modulation of the host-tumor interaction in an orthotopic model of murine prostate cancer. J Appl Physiol 113: 263-272, 2012. First published May 17, 2012; doi: 10.1152/japplphysiol.01575.2011.-The purpose of this study is to investigate the effects of exercise on cancer progression, metastasis, and underlying mechanisms in an orthotopic model of murine prostate cancer. C57BL/6 male mice (6-8 wk of age) were orthotopically injected with transgenic adenocarcinoma of mouse prostate C-1 cells (5 x 10(5)) and randomly assigned to exercise (n = 28) or a non-intervention control (n = 31) groups. The exercise group was given voluntary access to a wheel 24 h/day for the duration of the study. Four mice per group were serially killed on days 14, 31, and 36; the remaining 38 mice (exercise, n = 18; control, n = 20) were killed on day 53. Before death, MRI was performed to assess tumor blood perfusion. Primary tumor growth rate was comparable between groups, but expression of prometastatic genes was significantly modulated in exercising animals with a shift toward reduced metastasis. Exercise was associated with increased activity of protein kinases within the MEK/MAPK and PI3K/mTOR signaling cascades with subsequent increased intratumoral protein levels of HIF-1 alpha and VEGF. This was associated with improved tumor vascularization. Multiplex ELISAs revealed distinct reductions in plasma concentrations of several angiogenic cytokines in the exercise group, which was associated with increased expression of angiogenic and metabolic genes in the skeletal muscle. Exercise-induced stabilization of HIF-1 alpha and subsequent upregulation of VEGF was associated with "productive" tumor vascularization with a shift toward suppressed metastasis in an orthotopic model of prostate cancer.
引用
收藏
页码:263 / 272
页数:10
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