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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Pathol
2014 ; 184
(6
): 1860-70
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Recruitment of CD34(+) fibroblasts in tumor-associated reactive stroma: the
reactive microvasculature hypothesis
#MMPMID24713391
San Martin R
; Barron DA
; Tuxhorn JA
; Ressler SJ
; Hayward SW
; Shen X
; Laucirica R
; Wheeler TM
; Gutierrez C
; Ayala GE
; Ittmann M
; Rowley DR
Am J Pathol
2014[Jun]; 184
(6
): 1860-70
PMID24713391
show ga
Reactive stroma co-evolves with cancer, exhibiting tumor-promoting properties. It
is also evident at sites of wound repair and fibrosis, playing a key role in
tissue homeostasis. The specific cell types of origin and the spatial/temporal
patterns of reactive stroma initiation are poorly understood. In this study, we
evaluated human tumor tissue arrays by using multiple labeled, quantitative,
spectral deconvolution microscopy. We report here a novel CD34/vimentin
dual-positive reactive fibroblast that is observed in the cancer microenvironment
of human breast, colon, lung, pancreas, thyroid, prostate, and astrocytoma.
Recruitment of these cells occurred in xenograft tumors and Matrigel plugs in
vivo and was also observed in stromal nodules associated with human benign
prostatic hyperplasia. Because spatial and temporal data suggested the
microvasculature as a common site of origin for these cells, we analyzed
microvasculature fragments in organ culture. Interestingly, fibroblasts with
identical phenotypic properties and markers expanded radially from
microvasculature explants. We propose the concept of reactive microvasculature
for the evolution of reactive stroma at sites of epithelial disruption common in
both benign and malignant disorders. Data suggest that the reactive stroma
response is conserved among tissues, in normal repair, and in different human
cancers. A more clear understanding of the nature and origin of reactive stroma
is needed to identify novel therapeutic targets in cancer and fibrosis.