title: The calcineurin B subunit induces TNF-related apoptosis-inducing ligand (TRAIL) expression via CD11b-NF-κB pathway in RAW264.7 macrophages.
abstract: We showed previously that calcineurin B subunit (CnB) could inhibit S180 solid tumor growth in mice and prolong the survival of mice bearing H22 ascites tumors, but the underlying antitumor mechanism remained unclear. Here, we report that the calcineurin B subunit binds to CD11b on RAW264.7 macrophages and induces TRAIL expression and NF-κB activation in a dose and time dependent manner, and that CnB-induced TRAIL expression and NF-κB activation are both dependent on this CD11b. Furthermore, CnB-induced TRAIL expression is mediated by NF-κB. These findings reveal a novel signaling pathway (CnB-CD11b-NF-κB-TRAIL) regulating TRAIL expression and may help to understand the roles of the calcineurin B subunit in the regulation of innate immunity.
authors.affiliation: Department of Biochemistry and Molecular Biology, Beijing Normal University, Beijing Key Laboratory, Beijing 100875, PR China.
authors.forename: Zhenyi
authors.initials: Z
authors.lastname: Su
authors.forename: Shuai
authors.initials: S
authors.lastname: Xin
authors.forename: Lan
authors.initials: L
authors.lastname: Xu
authors.forename: Jinbo
authors.initials: J
authors.lastname: Cheng
authors.forename: Junxia
authors.initials: J
authors.lastname: Guo
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.forename: Qun
authors.initials: Q
authors.lastname: Wei
mesh_terms: D000818:Animals; D039481:CD11b Antigen / Q000378:metabolism*; D019703:Calcineurin / Q000235:genetics / Q000378:metabolism*; D002460:Cell Line; D006801:Humans; D008264:Macrophages / Q000378:metabolism*; D051379:Mice; D016328:NF-kappa B / Q000378:metabolism*; D053221:TNF-Related Apoptosis-Inducing Ligand / Q000096:biosynthesis*
chemical_list: D039481:CD11b Antigen; D016328:NF-kappa B; D053221:TNF-Related Apoptosis-Inducing Ligand; C505654:Tnfsf10 protein, mouse; D019703:Calcineurin; C525676:PPP3R1 protein, human