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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 Stem+Cell+Res+Ther
2017 ; 8
(1
): 106
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Human adult mesangiogenic progenitor cells reveal an early angiogenic potential,
which is lost after mesengenic differentiation
#MMPMID28464921
Montali M
; Panvini FM
; Barachini S
; Ronca F
; Carnicelli V
; Mazzoni S
; Petrini I
; Pacini S
Stem Cell Res Ther
2017[May]; 8
(1
): 106
PMID28464921
show ga
BACKGROUND: Mesangiogenic progenitor cells (MPCs) have shown the ability to
differentiate in-vitro toward mesenchymal stromal cells (MSCs) as well as
angiogenic potential. MPCs have so far been described in detail as progenitors of
the mesodermal lineage and appear to be of great significance in tissue
regeneration and in hemopoietic niche regulation. On the contrary, information
regarding the MPC angiogenic process is still incomplete and requires further
clarification. In particular, genuine MPC angiogenic potential should be
confirmed in-vivo. METHODS: In the present article, markers and functions
associated with angiogenic cells have been dissected. MPCs freshly isolated from
human bone marrow have been induced to differentiate into exponentially growing
MSCs (P2-MSCs). Cells have been characterized and angiogenesis-related gene
expression was evaluated before and after mesengenic differentiation. Moreover,
angiogenic potential has been tested by in-vitro and in-vivo functional assays.
RESULTS: MPCs showed a distinctive gene expression profile, acetylated-low
density lipoprotein uptake, and transendothelial migration capacity. However,
mature endothelial markers and functions of endothelial cells, including the
ability to form new capillaries, were absent, thus suggesting MPCs to be very
immature endothelial progenitors. MPCs showed marked 3D spheroid sprouting
activating the related molecular machinery, a clear in-vitro indication of early
angiogenesis. Indeed, MPCs applied to chicken chorioallantoic membrane induced
and participated in neovessel formation. All of these features were lost in
mesengenic terminally differentiated P2-MSCs, showing definite separation of the
two differentiation lineages. CONCLUSION: Our results confirm the bona-fide
angiogenic potential of MPCs and suggest that the high variability reported for
MSC cultures, responsible for the controversies regarding MSC angiogenic
potential, could be correlated to variable percentages of co-isolated MPCs in the
different culture conditions so far used.