Title: Prevalence of prostate cancer metastases after intravenous inoculation provides clues into the molecular basis of dormancy in the bone marrow microenvironment
Authors: Jung, Younghun ×
Shiozawa, Yusuke
Wang, Jingcheng
McGregor, Natalie
Dai, Jinlu
Park, Serk In
Berry, Janice E
Havens, Aaron M
Joseph, Jeena
Kim, Jin Koo
Patel, Lalit
Carmeliet, Peter
Daignault, Stephanie
Keller, Evan T
McCauley, Laurie K
Pienta, Kenneth J
Taichman, Russell S #
Issue Date: May-2012
Publisher: Stockton Press
Series Title: Neoplasia vol:14 issue:5 pages:429-439
Abstract: Bone is the preferred metastasis site of advanced prostate cancer (PCa). Using an in vivo murine model of human PCa cell metastasis to bone, we noted that the majority of animals that develop skeletal metastasis have either spinal lesions or lesions in the bones of the hindlimb. Much less frequently, lesions develop in the bones of the forelimb. We therefore speculated whether the environment of the forelimb bones is not permissive for the growth of PCa. Consequently, data on tumor prevalence were normalized to account for the number of PCa cells arriving after intravascular injection, marrow cellularity, and number of hematopoietic stem cell niches. None of these factors were able to account for the observed differences in tumor prevalence. An analysis of differential gene and protein levels identified that growth arrest specific-6 (GAS6) levels were significantly greater in the forelimb versus hindlimb bone marrow. When murine RM1 cells were implanted into subcutaneous spaces in immune competent animals, tumor growth in the GAS6(-/-) animals was greater than in GAS6(+/+) wild-type animals. In an osseous environment, the human PC3 cell line grew significantly better in vertebral body transplants (vossicles) derived from GAS6(-/-) animals than in vossicles derived from GAS6(+/+) animals. Together, these data suggest that the differences in tumor prevalence after intravascular inoculation are a useful model to study the molecular basis of tumor dormancy. Importantly, these data suggest that therapeutic manipulation of GAS6 levels may prove useful as a therapy for metastatic disease.
ISSN: 1522-8002
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Angiogenesis and Vascular Metabolism (Vesalius Research Center) (+)
× corresponding author
# (joint) last author

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