title: Hesperidin, hesperidin methyl chalone and phellopterin from Poncirus trifoliata (Rutaceae) differentially regulate the expression of adhesion molecules in tumor necrosis factor-alpha-stimulated human umbilical vein endothelial cells.
abstract: The fruits of Poncirus trifoliata (L.) are widely used in Oriental medicine to treat allergic inflammation. Recently, several active compounds including hesperidin, hesperidin methyl chalone and phellopterin from P. trifoliata (Rutaceae) were isolated and characterized. The goal of this study was to investigate the differential effect of hesperidin, hesperidin methyl chalone and phellopterin derived from P. trifoliata (Rutaceae) on the induction of intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) by TNF-alpha and the possible molecular mechanisms by which they differentially regulate ICAM-1 and VCAM-1 expressions. Stimulation of human umbilical vein endothelial cells (HUVECs) with TNF-alpha resulted in the increase of ICAM-1 and VCAM-1 expressions, while pretreatment with the three components completely inhibited VCAM-1 expression in a dose-dependent manner but had no effect on ICAM-1 expression. All three compounds failed to block TNF-alpha-induced phosphorylation of ERK1/2, which is involved in regulating ICAM-1 production by TNF-alpha. Furthermore, they efficiently inhibited the phosphorylation of Akt and PKC, suggesting that Akt or PKC pathways are an important target by which these compounds regulate TNF-alpha-induced VCAM-1 but not ICAM-1. Additionally, treatment with these chemicals also inhibited U937 monocyte adhesion to HUVECs stimulated with TNF-alpha. Interestingly, the inhibitory effect of hesperidin, hesperidin methyl chalone and phellopterin on monocyte adhesion to HUVECs was recapitulated by transfecting cells with VCAM-1 siRNA. Taken together, hesperidin, hesperidin methyl chalone and phellopterin reduce TNF-alpha-induced VCAM-1 expression through regulation of the Akt and PKC pathway, which contributes to inhibit the adhesion of monocytes to endothelium.
authors.affiliation: Department of Pharmacology, School of Medicine, Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea.
authors.forename: Irina Tsoy
authors.initials: IT
authors.lastname: Nizamutdinova
authors.forename: Jae Ju
authors.initials: JJ
authors.lastname: Jeong
authors.forename: Guang Hua
authors.initials: GH
authors.lastname: Xu
authors.forename: Seung-Ho
authors.initials: SH
authors.lastname: Lee
authors.forename: Sam Sik
authors.initials: SS
authors.lastname: Kang
authors.forename: Yeong Shik
authors.initials: YS
authors.lastname: Kim
authors.forename: Ki Churl
authors.initials: KC
authors.lastname: Chang
authors.forename: Hye Jung
authors.initials: HJ
authors.lastname: Kim
mesh_terms: D015153:Blotting, Western; D002448:Cell Adhesion / Q000187:drug effects; D015815:Cell Adhesion Molecules / Q000096:biosynthesis*; D047188:Chalcones / Q000302:isolation & purification / Q000494:pharmacology*; D003374:Coumarins / Q000302:isolation & purification / Q000494:pharmacology*; D042783:Endothelial Cells / Q000187:drug effects*; D005638:Fruit / Q000737:chemistry; D006569:Hesperidin / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D009000:Monocytes / Q000187:drug effects; D051058:Oncogene Protein v-akt / Q000378:metabolism; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism; D032104:Poncirus / Q000737:chemistry*; D011493:Protein Kinase C / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*; D020298:U937 Cells; D014471:Umbilical Veins / Q000166:cytology / Q000187:drug effects; D019010:Vascular Cell Adhesion Molecule-1 / Q000096:biosynthesis / Q000235:genetics
chemical_list: D015815:Cell Adhesion Molecules; D047188:Chalcones; D003374:Coumarins; D014409:Tumor Necrosis Factor-alpha; D019010:Vascular Cell Adhesion Molecule-1; C104601:phellopterin; C033022:hesperidin methylchalcone; D006569:Hesperidin; D019869:Phosphatidylinositol 3-Kinases; D051058:Oncogene Protein v-akt; D011493:Protein Kinase C