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• W1978951246 endingPage "1870" @default.
• W1978951246 startingPage "1860" @default.
• W1978951246 abstract "A thin film of poly(hydroxymethylsiloxane) (PHMS) has been deposited on glass dishes and tested as artificial support material for vascularization from mixed cultures of endothelial cells (EC) and pericytes (PC). The EC/PC co-cultures adhered massively on PHMS, with the formation of net-like microcapillary structures. Such evidence was not found on control glass substrates in the same co-culture conditions neither on PHMS for EC and PC in monocultures. The physicochemical characterization of PHMS and control glass surface by time-of-flight secondary ion mass spectrometry, X-ray photoelectron spectroscopy, water contact angle and atomic force microscopy, pointed to the main role of the polymer hydrophobilicy to explain the observed cellular behavior. Moreover, enhanced intercellular cross-talk was evidenced by the up-regulation and activation of cytoplasmic and Ca(2+)-independent phospholipase A(2) (cPLA(2) and iPLA(2)) expression and cPLA(2) phosphorylation, leading to the cell proliferation and microcapillary formation on the PHMS surface, as evidenced by confocal microscopy analyses. Co-cultures, established with growth-arrested PCs by treatment with mitomycin C, showed an increase in EC proliferation on PHMS. AACOCF(3) or co-transfection with cPLA(2) and iPLA(2)siRNA reduced cell proliferation. The results highlight the major role played by EC/PC cross-talk as well as the hydrophobic character of the substrate surface, to promote microcapillary formation. Our findings suggest an attractive strategy for vascular tissue engineering and provide new details on the interplay of artificial substrates and capillary formation." @default.
• W1978951246 created "2016-06-24" @default.
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• W1978951246 date "2012-09-01" @default.
• W1978951246 modified "2023-10-16" @default.
• W1978951246 title "Microcapillary-like structures prompted by phospholipase A2 activation in endothelial cells and pericytes co-cultures on a polyhydroxymethylsiloxane thin film" @default.
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• W1978951246 doi "https://doi.org/10.1016/j.biochi.2012.04.021" @default.
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