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2016 ; 107
(5
): 601-8
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Multikinase inhibitor regorafenib inhibits the growth and metastasis of colon
cancer with abundant stroma
#MMPMID26865419
Takigawa H
; Kitadai Y
; Shinagawa K
; Yuge R
; Higashi Y
; Tanaka S
; Yasui W
; Chayama K
Cancer Sci
2016[May]; 107
(5
): 601-8
PMID26865419
show ga
Interaction between tumor cells and stromal cells plays an important role in the
growth and metastasis of colon cancer. We previously found that
carcinoma-associated fibroblasts (CAFs) expressed platelet-derived growth factor
receptor-? (PDGFR-?) and that PDGFR targeted therapy using imatinib or nilotinib
inhibited stromal reaction. Bone marrow-derived mesenchymal stem cells (MSCs)
migrate to tumor stroma and differentiate into CAFs. A novel oral multikinase
inhibitor regorafenib inhibits receptor tyrosine kinases expressed on stromal
cells (vascular endothelial growth factor receptor 1-3, TIE2, PDGFR-?, and
fibroblast growth factors) and tumor cells (c-KIT, RET, and BRAF). These
molecules are involved in tumor growth, angiogenesis, lymphangiogenesis, and
stromal activation. Therefore, we examined whether regorafenib impaired the
tumor-promoting effect of CAFs/MSCs. KM12SM human colon cancer cells alone or
KM12SM cells with MSCs were transplanted into the cecal wall of nude mice.
Co-implantation of KM12SM cells with MSCs into the cecal wall of nude mice
produced tumors with abundant stromal component and promoted tumor growth and
lymph node metastasis. Single treatment with regorafenib inhibited tumor growth
and metastasis by inhibiting both tumor cells and stromal reaction. This
tumor-inhibitory effect of regorafenib was more obvious in tumors developed by
co-implanting KM12SM cells with MSCs. Our data suggested that targeting of the
tumor microenvironment with regorafenib affected tumor cell-MSC interaction,
which in turn inhibited the growth and metastasis of colon cancer.
|Animals
[MESH]
|Antineoplastic Agents/pharmacology/therapeutic use
[MESH]