scholarly journals Role of pigment epithelium-derived factor on proliferation and migration of choroidal capillary endothelium induced by vascular endothelial growth factor in vitro

2007 ◽  
Vol 120 (17) ◽  
pp. 1534-1538 ◽  
Author(s):  
Feng-hua WANG ◽  
Xiao-dong SUN ◽  
Xi ZHANG ◽  
Xun XU ◽  
Qi ZHU ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Pigment Epithelium ◽  
Capillary Endothelium ◽  
Vascular Endothelial ◽  
Pigment Epithelium Derived Factor ◽  
And Migration ◽  
Endothelial Growth Factor ◽  
Proliferation And Migration

scholarly journals Isolation and Characterisation of Lymphatic Endothelial Cells from Lung Tissues Affected by Lymphangioleiomyomatosis

2021 ◽  
Author(s):  
Koichi Nishino ◽  
Yasuhiro Yoshimatsu ◽  
Tomoki Muramatsu ◽  
Yasuhito Sekimoto ◽  
Keiko Mitani ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Endothelial Cells ◽  
Growth Factor ◽  
Normal Lung ◽  
Vascular Endothelial ◽  
Lymphatic Endothelial Cells ◽  
And Migration ◽  
Endothelial Growth Factor ◽  
Proliferation And Migration

Abstract Lymphangioleiomyomatosis (LAM) is a rare pulmonary disease characterised by the proliferation of smooth muscle-like cells (LAM cells), and an abundance of lymphatic vessels in LAM lesions. Studies reported that vascular endothelial growth factor-D (VEGF-D) secreted by LAM cells contributes to LAM-associated lymphangiogenesis, however, the precise mechanisms of lymphangiogenesis and characteristics of lymphatic endothelial cells (LECs) in LAM lesions have not yet been elucidated. In this study, human primary-cultured LECs were obtained both from LAM-affected lung tissues (LAM-LECs) and normal lung tissues (control LECs) using fluorescence-activated cell sorting (FACS). We found that LAM-LECs had significantly higher ability of proliferation and migration compared to control LECs. VEGF-D significantly promoted migration of LECs but not proliferation of LECs in vitro. cDNA microarray and FACS analysis revealed the expression of vascular endothelial growth factor receptor (VEGFR)-3 and integrin α9 were elevated in LAM-LECs. Inhibition of VEGFR-3 suppressed proliferation and migration of LECs, and blockade of integrin α9 reduced VEGF-D-induced migration of LECs. Our data uncovered the distinct features of LAM-associated LECs, increased proliferation and migration, which may be due to higher expression of VEGFR-3 and integrin α9. Furthermore, we also found VEGF-D/VEGFR-3 and VEGF-D/ integrin α9 signaling play an important role in LAM-associated lymphangiogenesis.

scholarly journals Evaluation of pigment epithelium-derived factor concentration in equine amniotic membrane homogenate and its in-vitro vascular endothelial growth factor inhibition effect in tears of dogs with vascularized ulcerative keratitis

2020 ◽  
Vol 10 (3) ◽  
Author(s):  
Tatiane Villar ◽  
Ana L. Pascoli ◽  
Sabal Chaulagain ◽  
Bahaa A. Fadl-Alla ◽  
Bianca C. Martins
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Amniotic Membrane ◽  
Pigment Epithelium ◽  
Corneal Neovascularization ◽  
Vascular Endothelial ◽  
Pigment Epithelium Derived Factor ◽  
Healthy Dogs ◽  
Endothelial Growth Factor ◽  
Ulcerative Keratitis

Background: Corneal neovascularization can result from many pathological processes affecting the ocular surface leading to disturbances and  opacifications that reduce corneal clarity and may impact vision. In veterinary medicine, the use of topical corticosteroid is contraindicated in the presence of ulcerative keratitis, and there is sparse research regarding safe medical alternatives to inhibit corneal neovascularization in dogs to improve visual outcome.Aim: To investigate the pigment epithelium-derived factor (PEDF) concentration in equine amniotic membrane homogenate (EAMH) and its in-vitro vascular endothelial growth factor (VEGF) inhibition in tears of dogs with vascularized ulcerative keratitis.Methods: Homogenates from 10 equine amniotic membranes (AM) were analyzed by sandwich enzyme-linked immunosorbent assay (ELISA) for quantification of equine PEDF and VEGF. Forty tear samples were collected from both eyes of dogs diagnosed with vascularized ulcerative keratitis, and 50 samples from healthy dogs. Samples from affected eyes were allocated to G1 – affected undiluted tears; G2 – affected tears diluted with phosphate-buffer solution; G3 – affected tears treated with low-concentrated EAMH; and G4 – affected tears treated with high-concentrated EAMH. Tears from the unaffected contralateral eyes were composed in G5, while G6 was composed by tears from healthy dogs (control). The presence and levels of VEGF were evaluated in all groups by Western blot and ELISA.Results: The PEDF:VEGF ratio in EAMH was 110:1. An increase in VEGF levels was observed in tears from eyes with vascularized corneal ulcers (G1) as well as in contralateral tears (G5), compared to normal dogs (G6). Highconcentrated EAMH provided a greater decrease in VEGF levels in-vitro compared to low-concentrated EAMH.Conclusion: EAMHs exhibited high concentrations of PEDF in comparison to VEGF and were able to partially decrease VEGF levels in tears of dogs with vascularized ulcers, in-vitro. Our results suggest that VEGF concentration is elevated in tears of dogs with active vascularized ulcerative keratitis in both affected and contralateral eyes compared to that of healthy dogs. Keywords: Amniotic membrane, Corneal neovascularization, Dog, PEDF, VEGF.

scholarly journals Isolation and characterisation of lymphatic endothelial cells from lung tissues affected by lymphangioleiomyomatosis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Koichi Nishino ◽  
Yasuhiro Yoshimatsu ◽  
Tomoki Muramatsu ◽  
Yasuhito Sekimoto ◽  
Keiko Mitani ◽  
...  
Keyword(s):  
Vascular Endothelial Growth Factor ◽  
Endothelial Cells ◽  
Growth Factor ◽  
Normal Lung ◽  
Vascular Endothelial ◽  
Lymphatic Endothelial Cells ◽  
And Migration ◽  
Endothelial Growth Factor ◽  
Proliferation And Migration

AbstractLymphangioleiomyomatosis (LAM) is a rare pulmonary disease characterised by the proliferation of smooth muscle-like cells (LAM cells), and an abundance of lymphatic vessels in LAM lesions. Studies reported that vascular endothelial growth factor-D (VEGF-D) secreted by LAM cells contributes to LAM-associated lymphangiogenesis, however, the precise mechanisms of lymphangiogenesis and characteristics of lymphatic endothelial cells (LECs) in LAM lesions have not yet been elucidated. In this study, human primary-cultured LECs were obtained both from LAM-affected lung tissues (LAM-LECs) and normal lung tissues (control LECs) using fluorescence-activated cell sorting (FACS). We found that LAM-LECs had significantly higher ability of proliferation and migration compared to control LECs. VEGF-D significantly promoted migration of LECs but not proliferation of LECs in vitro. cDNA microarray and FACS analysis revealed the expression of vascular endothelial growth factor receptor (VEGFR)-3 and integrin α9 were elevated in LAM-LECs. Inhibition of VEGFR-3 suppressed proliferation and migration of LECs, and blockade of integrin α9 reduced VEGF-D-induced migration of LECs. Our data uncovered the distinct features of LAM-associated LECs, increased proliferation and migration, which may be due to higher expression of VEGFR-3 and integrin α9. Furthermore, we also found VEGF-D/VEGFR-3 and VEGF-D/ integrin α9 signaling play an important role in LAM-associated lymphangiogenesis.

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