title: Trp-Lys-Tyr-Met-Val-Met stimulates phagocytosis via phospho-lipase D-dependent signaling in mouse dendritic cells.
abstract: Dendritic cells (DCs) play a key role in activating the immune response against invading pathogens as well as dying cells or tumors. Although the immune response can be initiated by the phagocytic activity by DCs, the molecular mechanism involved in this process has not been fully investigated. Trp-Lys-Tyr-Met-Val-Met-NH(2) (WKYMVM) stimulates the activation of phospholipase D (PLD) via Ca(2+) increase and protein kinase C activation in mouse DC cell line, DC2.4. WKYMVM stimulates the phagocytic activity, which is inhibited in the presence of N-butanol but not t-butanol in DC2.4 cells. Furthermore, the addition of phosphatidic acid, an enzymatic product of PLD activity, enhanced the phagocytic activity in DC2.4 cells. Since at least two of formyl peptide receptor (FPR) family (FPR1 and FPR2) are expressed in DC2.4 as well as in mouse bone marrow-derived dendritic cells, this study suggests that the activation of FPR family by WKYMVM stimulates the PLD activity resulting in phagocytic activity in DC2.4 cells.
authors.affiliation: Medical Research Center for Cancer Molecular Therapy, College of Medicine, Dong-A University, Busan 602-714, Korea.
authors.forename: Ha-Young
authors.initials: HY
authors.lastname: Lee
authors.forename: Hyun Kyu
authors.initials: HK
authors.lastname: Kang
authors.forename: Eun Jin
authors.initials: EJ
authors.lastname: Jo
authors.forename: Jung Im
authors.initials: JI
authors.lastname: Kim
authors.forename: Youl-Nam
authors.initials: YN
authors.lastname: Lee
authors.forename: Sang Hwa
authors.initials: SH
authors.lastname: Lee
authors.forename: Yeong Min
authors.initials: YM
authors.lastname: Park
authors.forename: Sung Ho
authors.initials: SH
authors.lastname: Ryu
authors.forename: Jong-Young
authors.initials: JY
authors.lastname: Kwak
authors.forename: Yoe-Sik
authors.initials: YS
authors.lastname: Bae
mesh_terms: D020001:1-Butanol / Q000494:pharmacology; D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology / Q000378:metabolism; D020013:Calcium Signaling / Q000187:drug effects*; D016923:Cell Death / Q000276:immunology; D002460:Cell Line; D003141:Communicable Diseases / Q000276:immunology; D003713:Dendritic Cells / Q000276:immunology / Q000378:metabolism*; D051379:Mice; D009369:Neoplasms / Q000276:immunology; D009842:Oligopeptides / Q000494:pharmacology*; D010587:Phagocytosis / Q000187:drug effects*; D010712:Phosphatidic Acids / Q000494:pharmacology; D010739:Phospholipase D / Q000378:metabolism*; D044042:Receptors, Formyl Peptide / Q000378:metabolism*; D020002:tert-Butyl Alcohol / Q000494:pharmacology
chemical_list: D009842:Oligopeptides; D010712:Phosphatidic Acids; D044042:Receptors, Formyl Peptide; C113617:Trp-Lys-Tyr-Met-Val-Met; D020001:1-Butanol; D010739:Phospholipase D; D020002:tert-Butyl Alcohol