T Hamazaki1, T Nagasawa, K Hamazaki, M Itomura. 1. Department of Clinical Sciences, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama City, Toyama, Japan. hamazaki@inm.u-toyama.ac.jp
Abstract
INTRODUCTION: Cartilage contains high levels of n-9 eicosatrienoic acid (20:3n-9) but no blood vessels. 20:3n-9 might inhibit angiogenesis. MATERIALS AND METHODS: Angiogenesis was measured in human umbilical vein endothelial cells and diploid fibroblasts. Co-culture was performed with vascular endothelial growth factor-A (VEGF-A, 10 ng/mL) and fatty acids (0.1-10 μmol/L). After 10 days of incubation and immunostaining for endothelial cells, vessel areas were calculated with image analyser software. RESULTS: Addition of 20:3n-9 and n-3 eicosatrienoic acid (20:3n-3) dose dependently inhibited VEGF-A-stimulated angiogenesis (more than the positive control suramin). Arachidonic, eicosapentaenoic, dihomo-γ-linolenic (20:3n-6) and oleic acids did not affect VEGF-A-stimulated angiogenesis even at 10 μmol/L. Arachidonic and dihomo-γ-linolenic acids enhanced angiogenesis without VEGF-A. DISCUSSION AND CONCLUSIONS: We suggest that the presence of 20:3n-9 in cartilage may be related to its vessel-free status and that 20:3n-9 may be useful for the treatment of disorders with excessive vasculature. ACKNOWLEDGEMENTS: This work was partly supported by Polyene Project, Inc.
INTRODUCTION: Cartilage contains high levels of n-9 eicosatrienoic acid (20:3n-9) but no blood vessels. 20:3n-9 might inhibit angiogenesis. MATERIALS AND METHODS: Angiogenesis was measured in human umbilical vein endothelial cells and diploid fibroblasts. Co-culture was performed with vascular endothelial growth factor-A (VEGF-A, 10 ng/mL) and fatty acids (0.1-10 μmol/L). After 10 days of incubation and immunostaining for endothelial cells, vessel areas were calculated with image analyser software. RESULTS: Addition of 20:3n-9 and n-3 eicosatrienoic acid (20:3n-3) dose dependently inhibited VEGF-A-stimulated angiogenesis (more than the positive control suramin). Arachidonic, eicosapentaenoic, dihomo-γ-linolenic (20:3n-6) and oleic acids did not affect VEGF-A-stimulated angiogenesis even at 10 μmol/L. Arachidonic and dihomo-γ-linolenic acids enhanced angiogenesis without VEGF-A. DISCUSSION AND CONCLUSIONS: We suggest that the presence of 20:3n-9 in cartilage may be related to its vessel-free status and that 20:3n-9 may be useful for the treatment of disorders with excessive vasculature. ACKNOWLEDGEMENTS: This work was partly supported by Polyene Project, Inc.
Authors: Katherine D Connolly; Irina A Guschina; Vincent Yeung; Aled Clayton; Mohd Shazli Draman; Christopher Von Ruhland; Marian Ludgate; Philip E James; D Aled Rees Journal: J Extracell Vesicles Date: 2015-11-24