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. 2017 Feb 7;36:27. doi: 10.1186/s13046-017-0495-3

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© The Author(s). 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 4 — PI3K and COX-2 involved phenotype changes of HUVECs. a Phase contrast micrographs of capillary-like tubular structures on Matrigel. Magnification, x100. Graph bars showed the tube (left panel) and node (right panel) numbers of HUVECs treated with LY294002 or celecoxib in a co-culture system (*P < 0.05). b Apoptotic percentage of HUVECs with LY294002 treatment in the co-culture system as measured by TUNEL assay. Green: TUNEL-positive nuclei. Red: all nuclei. Bar graphs revealed the apoptotic percentage of HUVECs with LY294002 treatment after co-culture with CL1-5 cells (*P < 0.05). The data are presented as the mean ± SD. Experiments were performed in triplicate. c Immunoblot of cleaved Caspase 3 and PARP of HUVECs; α-tubulin was used as the loading control