title: TLR4 signaling induces B7-H1 expression through MAPK pathways in bladder cancer cells.
abstract: TLR4 (Toll-like receptor 4) and B7-H1, which were known to be restricted to immune cells in the past, were found to be aberrantly expressed in a majority of tumor cells, facilitating tumor evasion from immune surveillance. Our study demonstrated that activation of TLR4 signaling in bladder cancer cells up-regulated B7-H1 expression. Furthermore, this regulation was significantly attenuated by ERK or JNK inhibitor. Our results elucidated the molecule mechanism of regulation of B7-H1 expression through TLR4 signaling and may suggest new strategies of down-regulating the cancer-associated B7-H1 expression for bladder cancer treatment.
authors.affiliation: Department of Hepatobiliary Pancreatic Surgery, Key Lab of Organ Transplantation of Zhejiang Province, Ministry of Public Health, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.
authors.forename: Yigang
authors.initials: Y
authors.lastname: Qian
authors.forename: Junfang
authors.initials: J
authors.lastname: Deng
authors.forename: Lei
authors.initials: L
authors.lastname: Geng
authors.forename: Haiyang
authors.initials: H
authors.lastname: Xie
authors.forename: Guoping
authors.initials: G
authors.lastname: Jiang
authors.forename: Lin
authors.initials: L
authors.lastname: Zhou
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
authors.forename: Shenyong
authors.initials: S
authors.lastname: Yin
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Feng
authors.forename: Junwei
authors.initials: J
authors.lastname: Liu
authors.forename: Zhou
authors.initials: Z
authors.lastname: Ye
authors.forename: Shusen
authors.initials: S
authors.lastname: Zheng
mesh_terms: D000873:Anthracenes / Q000494:pharmacology; D015703:Antigens, CD / Q000096:biosynthesis* / Q000235:genetics; D060890:B7-H1 Antigen; D002295:Carcinoma, Transitional Cell / Q000378:metabolism* / Q000473:pathology; D045744:Cell Line, Tumor; D002867:Chromones / Q000494:pharmacology; D048049:Extracellular Signal-Regulated MAP Kinases / Q000037:antagonists & inhibitors / Q000502:physiology; D005419:Flavonoids / Q000494:pharmacology; D006801:Humans; D007093:Imidazoles / Q000494:pharmacology; D048031:JNK Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000502:physiology; D018950:Lipopolysaccharide Receptors / Q000502:physiology; D008070:Lipopolysaccharides / Q000494:pharmacology; D020935:MAP Kinase Signaling System / Q000187:drug effects / Q000502:physiology*; D009025:Morpholines / Q000494:pharmacology; D009363:Neoplasm Proteins / Q000037:antagonists & inhibitors / Q000096:biosynthesis / Q000235:genetics / Q000502:physiology*; D019869:Phosphatidylinositol 3-Kinases / Q000502:physiology; D000081082:Phosphoinositide-3 Kinase Inhibitors; D010766:Phosphorylation / Q000187:drug effects; D047428:Protein Kinase Inhibitors / Q000494:pharmacology; D011499:Protein Processing, Post-Translational / Q000187:drug effects; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D011725:Pyridines / Q000494:pharmacology; D051197:Toll-Like Receptor 4 / Q000502:physiology*; D015854:Up-Regulation / Q000187:drug effects; D001749:Urinary Bladder Neoplasms / Q000378:metabolism* / Q000473:pathology
chemical_list: D000873:Anthracenes; D015703:Antigens, CD; D060890:B7-H1 Antigen; D002867:Chromones; D048049:Extracellular Signal-Regulated MAP Kinases; D005419:Flavonoids; D007093:Imidazoles; D048031:JNK Mitogen-Activated Protein Kinases; D018950:Lipopolysaccharide Receptors; D008070:Lipopolysaccharides; D009025:Morpholines; D009363:Neoplasm Proteins; D019869:Phosphatidylinositol 3-Kinases; D000081082:Phosphoinositide-3 Kinase Inhibitors; D047428:Protein Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt; D011725:Pyridines; D051197:Toll-Like Receptor 4; C423236:CD274 protein, human; C495345:TLR4 protein, human; C440499:lipopolysaccharide, Escherichia coli O111 B4; C432165:pyrazolanthrone; C085911:2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one; C494918:AKT1 protein, human; C093642:SB 203580; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one