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2018 ; 38
(1
): 46
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Role of (myo)fibroblasts in the development of vascular and connective tissue
structure of the C38 colorectal cancer in mice
#MMPMID29976246
Bugyik E
; Szabó V
; Dezs? K
; Rókusz A
; Szücs A
; Nagy P
; Tóvári J
; László V
; Döme B
; Paku S
Cancer Commun (Lond)
2018[Jul]; 38
(1
): 46
PMID29976246
show ga
BACKGROUND: It remains unclear if the vascular and connective tissue structures
of primary and metastatic tumors are intrinsically determined or whether these
characteristics are defined by the host tissue. Therefore we examined the
microanatomical steps of vasculature and connective tissue development of C38
colon carcinoma in different tissues. METHODS: Tumors produced in mice at five
different locations (the cecal wall, skin, liver, lung, and brain) were analyzed
using fluorescent immunohistochemistry, electron microscopy and quantitative
real-time polymerase chain reaction. RESULTS: We found that in the cecal wall,
skin, liver, and lung, resident fibroblasts differentiate into collagenous
matrix-producing myofibroblasts at the tumor periphery. These activated
fibroblasts together with the produced matrix were incorporated by the tumor. The
connective tissue development culminated in the appearance of intratumoral tissue
columns (centrally located single microvessels embedded in connective tissue and
smooth muscle actin-expressing myofibroblasts surrounded by basement membrane).
Conversely, in the brain (which lacks fibroblasts), C38 metastases only induced
the development of vascularized desmoplastic tissue columns when the growing
tumor reached the fibroblast-containing meninges. CONCLUSIONS: Our data suggest
that the desmoplastic host tissue response is induced by tumor-derived fibrogenic
molecules acting on host tissue fibroblasts. We concluded that not only the host
tissue characteristics but also the tumor-derived fibrogenic signals determine
the vascular and connective tissue structure of tumors.