title: Cutting edge: Chandra, a novel four-transmembrane domain protein differentially expressed in helper type 1 lymphocytes.
abstract: Development of naive Th cells into Th1 and Th2 effector populations requires coordinated expression of a complex set of genes. In this study, we have identified a novel four-transmembrane domain protein, Chandra, that is differentially expressed in Th1 cells. Chandra expression is observed in STAT4- and IFN-gamma-deficient mice, indicating that Chandra is not an IL-12- or IFN-gamma-responsive gene. Interestingly, Chandra mRNA is detected in anti-CD3-activated T cells from STAT6-deficient mice in the absence of any differentiation conditions. Furthermore, neutralization of IL-4 signaling is sufficient to induce transcription of Chandra in anti-CD3-activated T cells from wild-type mice, demonstrating that STAT6 signaling is required to repress Chandra expression in activated T cells and Th2 subsets. This is the first demonstration of a differentially expressed four-transmembrane domain protein in Th1 cells.
authors.affiliation: Tularik, South San Francisco, CA 94080, USA.
authors.forename: C
authors.initials: C
authors.lastname: Venkataraman
authors.forename: G
authors.initials: G
authors.lastname: Schaefer
authors.forename: U
authors.initials: U
authors.lastname: Schindler
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002460:Cell Line; D004268:DNA-Binding Proteins / Q000502:physiology; D005260:Female; D005786:Gene Expression Regulation / Q000276:immunology; D015847:Interleukin-4 / Q000502:physiology; D008565:Membrane Proteins / Q000037:antagonists & inhibitors / Q000096:biosynthesis* / Q000235:genetics; D051379:Mice; D008806:Mice, Inbred AKR; D008807:Mice, Inbred BALB C; D018345:Mice, Knockout; D008969:Molecular Sequence Data; D017434:Protein Structure, Tertiary; D050794:STAT1 Transcription Factor; D050797:STAT4 Transcription Factor; D015398:Signal Transduction / Q000276:immunology; D018417:Th1 Cells / Q000378:metabolism*; D015534:Trans-Activators / Q000502:physiology
chemical_list: D004268:DNA-Binding Proteins; D008565:Membrane Proteins; C411486:Ms4a4b protein, mouse; D050794:STAT1 Transcription Factor; D050797:STAT4 Transcription Factor; C494080:Stat1 protein, mouse; C494091:Stat4 protein, mouse; D015534:Trans-Activators; D015847:Interleukin-4