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2014 ; 2
(ä): 3
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Human lung telocytes could promote the proliferation and angiogenesis of human
pulmonary microvascular endothelial cells in vitro
#MMPMID26056572
Zheng Y
; Chen X
; Qian M
; Zhang M
; Zhang D
; Bai C
; Wang Q
; Wang X
Mol Cell Ther
2014[]; 2
(ä): 3
PMID26056572
show ga
BACKGROUND: In the previous studies, telocytes were found near the capillaries in
many tissues, especially on the extracellular matrix of blood vessels and
positive to CD34 and c-kit. Therefore, the present study aimed to explore if
telocytes could produce angiogenesis associated cytokines, promote the
proliferation and the angiogenesis of vascular endothelial cells in vitro.
METHODS: Human lung telocytes were isolated and cultured, and were identified by
immunofluorescence cytochemistry with CD34, c-kit and vimentin. Telocytes
conditional media (TCM) was prepared, and the expressions of angiogenesis
associated cytokines in TCM were detected by ELISA. Human pulmonary microvascular
endothelial cells (HPMECs) were cultured with DMEM media or TCM for 72 hours. The
proliferation of HPMECs was continuously detected with CCK-8 kit at an interval
of 12 hours. HPMECs were also injured by lipopolysaccharide, and cultured with
TCM and DMEM respectively, and the tube formation capacity was detected. RESULTS:
Telocytes were positive for CD34, c-kit and vimentin. The expressions of VEGF and
EGF in TCM were significantly higher, the proliferation of HPMECs cultured with
TCM significantly increased, and the tube formation of HPMECs injured by
endotoxin was improved with the culture of TCM, as compared with the culture of
DMEM. CONCLUSION: The present study provides the evidence that human lung
telocytes could produce the growth factors, such as VEGF and EGF. Telocytes
conditional media induced the proliferation of pulmonary endothelial cells and
prevented from endotoxin-induced compromise of pulmonary endothelial
angiogenesis.