title: Astilbin inhibits the adhesion of T lymphocytes via decreasing TNF-alpha and its associated MMP-9 activity and CD44 expression.
abstract: Our previous study has revealed that astilbin, a flavonoid isolated from the rhizome of Smilax glabra, improves an immunological liver injury and its mechanism includes an inhibition of the lymphocyte adhesion. The present study further examined the anti-adhesive activity in various assays by using human leukemia T cell line Jurkat cells. We found that astilbin inhibited the adhesion of Con A or PMA-activated Jurkat cells to fibronectin, type IV collagen, hyaluronic acid, and [corrected] ECV-304 cells. Astilbin inhibited the adhesion of Jurkat cells to PMA-activated but not non-activated ECV-304 cells without any influence on the survival of the ECV-304 cells and Jurkat cells. Astilbin also inhibited the CD44 expression and TNF-alpha production in Jurkat cells. In the co-culture assay between Jurkat cells and ECV-304 cells, the MMP-9 secretion from Jurkat cells was inhibited after astilbin-treatment, while the exogenous TNF-alpha increased the MMP-9 secretion in a dose-dependent manner. These findings suggest that the inhibition of T lymphocyte adhesion by astilbin may be related to the reduction of the CD44 expression and TNF-alpha production in the cells, which may further cause a decreased MMP-9 secretion.
authors.affiliation: State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing 210093, China.
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Yi
authors.forename: Xiao-Min
authors.initials: XM
authors.lastname: Lu
authors.forename: Feng
authors.initials: F
authors.lastname: Fang
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Xu
mesh_terms: D002448:Cell Adhesion / Q000187:drug effects* / Q000502:physiology; D002478:Cells, Cultured; D044948:Flavonols / Q000494:pharmacology*; D015870:Gene Expression / Q000187:drug effects*; D006801:Humans; D018960:Hyaluronan Receptors / Q000235:genetics / Q000378:metabolism*; D019169:Jurkat Cells / Q000187:drug effects / Q000378:metabolism; D020780:Matrix Metalloproteinase 9 / Q000378:metabolism*; D016176:T-Lymphocyte Subsets; D013601:T-Lymphocytes / Q000187:drug effects* / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
chemical_list: D044948:Flavonols; D018960:Hyaluronan Receptors; D014409:Tumor Necrosis Factor-alpha; C099069:astilbin; D020780:Matrix Metalloproteinase 9