Anti-CD79A monoclonal antibody, clone HM57 [R-PE]

Based on diel and circadian leaf transcriptomes in barley wild-type and clock mutant lines we predicted a structure of the barley circadian oscillator and interactions of its individual components with day/night cues. The circadian clock is a complex transcriptional network that regulates gene expression in anticipation of the day/night cycle and controls agronomic traits in plants. However, in crops, how the internal clock and day/night cues affect the transcriptome remains poorly understood. We analyzed thedieland circadian leaf transcriptomes in the barley (Hordeum vulgare) cultivar 'Bowman' and derived introgression lines harboring mutations inEARLY FLOWERING3(ELF3),LUX ARRHYTHMO1(LUX1), andEARLY MATURITY7(EAM7). Theelf3andlux1mutants exhibited abolished circadian transcriptome oscillations under constant conditions, whereaseam7maintained oscillations of approximate to 30% of the circadian transcriptome. However, day/night cues fully restored transcript oscillations in all three mutants and thus compensated for a disrupted oscillator in the arrhythmic barley clock mutantself3andlux1. Nevertheless,elf3, but notlux1, affected the phase of thedieloscillating transcriptome and thus the integration of external cues into the clock. Using dynamical modeling, we predicted a structure of the barley circadian oscillator and interactions of its individual components with day/night cues. Our findings provide a valuable resource for exploring the function and output targets of the circadian clock and for further investigations into thedieland circadian control of the barley transcriptome.

Background/Aims: The E74-like factor 3 (ELF3) is an inflammatory mediator that participates in cartilage destruction in osteoarthritis. Leptin and other adipokines negatively impact articular cartilage, triggering catabolic and inflammatory responses in chondrocytes. Here, we investigated whether leptin induces ELF3 expression in chondrocytes and the signaling pathway involved in this process. Methods: We determined mRNA and protein levels of ELF3 by RT-qPCR and Western blotting using cultured human primary chondrocytes and the human T/C-28a2 chondrocyte cell line. Further, we measured luciferase activities of different reporter constructs, and we assessed the contribution of leptin to the induction of ELF3 mRNA by knocking down hLEPR gene expression using siRNA technology. Results: Leptin synergizes with IL-1 beta in inducing ELF3 expression in chondrocytes. We also found that PI3K, p38, and JAK2 signaling pathways are at play in the leptin-driven induction of ELF3. Moreover, we confirm the participation of NF kappa B in the leptin/IL-1 beta synergistic induction of ELF3. Conclusion: Here we show, for the first time, the regulation of ELF3 expression by leptin, suggesting that this transcription factor likely mediates the inflammatory responses triggered by leptin in articular chondrocytes. (C) 2018 The Author(s) Published by S. Karger AG, Basel