title: In vivo suppression of mafA mRNA with siRNA and analysis of the resulting alteration of the gene expression profile in mouse pancreas by the microarray method.
abstract: Maf is a family of transcription factor proteins that is characterized by a typical bZip structure, and one of the large mafs, mafA is a strong transactivator of insulin. To explore the role of mafA in the pancreas, we modified the mafA mRNA level in vivo in mice by the RNA interference (siRNA) technique and analyzed the resulting alteration of the expressed gene profile with a microarray system. The mafA expression level in siRNA-treated mice was reduced approximately 60% compared with control-siRNA-treated animals. Microarray analysis revealed changes in the expression level of several genes in the siRNA-treated mice, with prominent down-regulated expression of the genes encoding insulin, glucagon, and adipocytokines, suggesting possible role of mafA in the pathophysiological states of impaired metabolic responses or inflammatory reactions.
authors.affiliation: Institute of Geriatrics, Tokyo Women's Medical University, 2-15-1 Shibuya, Shibuya-ku, Tokyo 150-0002, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tsuchiya
authors.forename: T
authors.initials: T
authors.lastname: Yoshida
authors.forename: S
authors.initials: S
authors.lastname: Taniguchi
authors.forename: K
authors.initials: K
authors.lastname: Yasuda
authors.forename: A
authors.initials: A
authors.lastname: Maeda
authors.forename: A
authors.initials: A
authors.lastname: Hayashi
authors.forename: J
authors.initials: J
authors.lastname: Tanaka
authors.forename: M
authors.initials: M
authors.lastname: Shigemoto
authors.forename: K
authors.initials: K
authors.lastname: Nitta
authors.forename: K
authors.initials: K
authors.lastname: Tsuchiya
mesh_terms: D052242:Adiponectin / Q000235:genetics; D000818:Animals; D015153:Blotting, Western; D011416:Complement Factor D / Q000235:genetics; D020869:Gene Expression Profiling; D005934:Glucagon / Q000235:genetics; D007275:Injections, Intravenous; D007328:Insulin / Q000235:genetics; D051473:Maf Transcription Factors, Large / Q000235:genetics* / Q000378:metabolism; D008297:Male; D051379:Mice; D020411:Oligonucleotide Array Sequence Analysis / Q000379:methods*; D020799:Pancrelipase / Q000378:metabolism*; D034622:RNA Interference; D012333:RNA, Messenger / Q000235:genetics* / Q000378:metabolism; D034741:RNA, Small Interfering / Q000008:administration & dosage / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D052242:Adiponectin; D007328:Insulin; D051473:Maf Transcription Factors, Large; C485160:Mafa protein, mouse; D012333:RNA, Messenger; D034741:RNA, Small Interfering; D020799:Pancrelipase; D005934:Glucagon; D011416:Complement Factor D