title: Upregulation of NF-kappaB upon differentiation of mouse embryonic stem cells.
abstract: NF-kappaB is a transcriptional regulator involved in many biological processes including proliferation, survival, and differentiation. Recently, we reported that expression and activity of NF-kappaB is comparatively low in undifferentiated human embryonic stem (ES) cells, but increases during differentiation. Here, we found a lower expression of NF-kappaB p65 protein in mouse ES cells when compared with mouse embryonic fibroblast cells. Protein levels of NF-kappaB p65 and relB were clearly enhanced during retinoic acid-induced differentiation. Furthermore, increased DNA binding activity of NF-kappaB in response to TNF-alpha, an agonist of NF-kappaB signaling, was seen in differentiated but not undifferentiated mouse ES cells. Taken together with our previous data in human ES cells, it is likely that NF-kappaB expression and activity of the NF-kappaB signaling pathway is comparatively low in undifferentiated ES cells, but increases during differentiation of ES cells in general.
authors.affiliation: Department of Biochemistry, College of Natural Sciences, Chungbuk National University, Cheongju, Korea.
authors.forename: Young-Eun
authors.initials: YE
authors.lastname: Kim
authors.forename: Ho-Bum
authors.initials: HB
authors.lastname: Kang
authors.forename: Jeong-A
authors.initials: JA
authors.lastname: Park
authors.forename: Ki-Hoan
authors.initials: KH
authors.lastname: Nam
authors.forename: Hyung-Joo
authors.initials: HJ
authors.lastname: Kwon
authors.forename: Younghee
authors.initials: Y
authors.lastname: Lee
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D004247:DNA / Q000378:metabolism; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental / Q000187:drug effects; D051379:Mice; D016328:NF-kappa B / Q000235:genetics* / Q000378:metabolism; D011485:Protein Binding / Q000187:drug effects; D047888:Receptors, Tumor Necrosis Factor, Type I / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D015854:Up-Regulation / Q000187:drug effects / Q000235:genetics*
chemical_list: D016328:NF-kappa B; D047888:Receptors, Tumor Necrosis Factor, Type I; D014409:Tumor Necrosis Factor-alpha; D004247:DNA