Effects of Propyl Gallate on adhesion of polymorphonuclear leukocytes to human endothelial cells induced by tumor necrosis factor alpha |
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Authors: | Yue-rong Jiang Ke-ji Chen Yong-gang Xu Xiao-hong Yang and Hui-jun Yin |
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Institution: | (1) Department of Cardiovascular Diseases, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, 100091, China;(2) Laboratory of Hematopathy, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, 100091, China |
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Abstract: | Objective To investigate the effects of Propyl Gallate (PrG) on cellular adhesion between human To investigate the effects of Propyl
Gallate (PrG) on cellular adhesion between human umbilical vein endothelial cells (HUVEC) and polymorphonuclear leukocytes
(PMN) as well as the expression umbilical vein endothelial cells (HUVEC) and polymorphonuclear leukocytes (PMN) as well as
the expression of intercellular adhesion molecule-1 (ICAM-1, CD54) and E-selectin (CD62E) on the VEC surface. of intercellular
adhesion molecule-1 (ICAM-1, CD54) and E-selectin (CD62E) on the VEC surface.
Methods A human VEC inflammation model was induced by tumor necrosis factor alpha (TNF-α). VECs were pre- A human VEC inflammation
model was induced by tumor necrosis factor alpha (TNF-α). VECs were preincubated with varying concentrations of PrG (0.001–5
mmol/L) or 1‰ DMSO (v:v) or 10 mmol/L acetylsalicylic incubated with varying concentrations of PrG (0.001–5 mmol/L) or 1‰
DMSO (v:v) or 10 mmol/L acetylsalicylic acid (ASA) for 1 h, and then were stimulated with 10 ng/mL TNF-α for 6 h. Rose bengal
vital staining method acid (ASA) for 1 h, and then were stimulated with 10 ng/mL TNF-α for 6 h. Rose bengal vital staining
method was used to measure the adherence rate of PMN to VEC, while flow cytometry was used to determine the was used to measure
the adherence rate of PMN to VEC, while flow cytometry was used to determine the expression of CD54 and CD62E on the VEC surface.
expression of CD54 and CD62E on the VEC surface.
Results After 6 h of incubation with TNF-α, the adherence After 6 h of incubation with TNF-α, the adherence of PMN to HUVECs as well
as the percentage of fluorescence-positive cells and mean fluorescence intensity of PMN to HUVECs as well as the percentage
of fluorescence-positive cells and mean fluorescence intensity (MFI) of surface CD54 and CD62E in HUVECs increased significantly
( (MFI) of surface CD54 and CD62E in HUVECs increased significantly (P<0.01). Pre-treatment of HUVECs with <0.01). Pre-treatment of HUVECs with PrG (0.1–5 mmol/L) significantly suppressed the
adherence of PMN to VECs induced by TNF-α (PrG (0.1–5 mmol/L) significantly suppressed the adherence of PMN to VECs induced
by TNF-α (P<0.05). PrG <0.05). PrG (1–5 mmol/L) inhibited the VEC surface expression of CD62E and CD54 in a dose-dependent way ( (1–5
mmol/L) inhibited the VEC surface expression of CD62E and CD54 in a dose-dependent way (P<0.05). PrG <0.05). PrG at lower concentrations (0.001–0.1 mmol/L) showed no effect on CD54 expression, while it showed a
slightly at lower concentrations (0.001–0.1 mmol/L) showed no effect on CD54 expression, while it showed a slightly increasing
trend in CD62E expression (increasing trend in CD62E expression (P>0.05). ASA at 10 mmol/L had no obvious effect on the positive rate of >0.05). ASA at 10 mmol/L had no obvious effect on the
positive rate of CD62E and CD54. CD62E and CD54.
Conclusions High concentrations of PrG (0.1–5 mmol/L) exert its inhibitory effect on cellular High concentrations of PrG (0.1–5 mmol/L)
exert its inhibitory effect on cellular adherence of PMN to HUVECs, and its mechanism may be related to inhibiting surface
expression of CD54 and adherence of PMN to HUVECs, and its mechanism may be related to inhibiting surface expression of CD54
and CD62E in HUVECs. Its action concentration was lower than that of ASA. CD62E in HUVECs. Its action concentration was lower
than that of ASA.
Supported by the National Natural Science Foundation of China (No. 90409021) |
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Keywords: | cellular adhesion intercellular adhesion molecule-1 E-selectin Propyl Gallate |
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