NFAT indicates nucleocytoplasmic damped oscillation via its feedback modulator. 2021

Masashi Muramatsu, and Takeshi Ito, and Hokuto Shimoji, and Miko Komiya, and Yuri Miyamura, and Koichi Nishiyama, and Takashi Suzuki, and Takashi Minami
Divison of Molecular and Vascular Biology, Institute of Resource Development and Analysis, Kumamoto University, Kumamoto, Japan.

Cell signaling and the following gene regulation are tightly regulated to keep homeostasis. NF-κB is a famous key transcription factor for inflammatory cell regulations that obtain a closed feedback loop with IκB. Similarly, we show here, NFAT is also tightly regulated via its downstream target, down syndrome critical region (DSCR)-1. In primary cultured endothelium, either shear stress or VEGF treatment revealed quick NFAT1 nuclear localization following the DSCR-1 transactivation, which in turn induced NFAT1 cytoplasm sequestration. Interestingly, both NFAT and DSCR-1 can be competitive substrates for calcineurin phosphatase and DSCR-1 is known to unstable protein, which caused NFAT1-nucleocytoplasmic damped oscillation via sustained shear stress or VEGF stimulation in endothelial cell (EC)s. To understand the molecular mechanism underlying the NFAT1 oscillation, we built a mathematical model of spatiotemporal regulation of NFAT1 combined with calcineurin and DSCR-1. Theoretically, manipulation of DSCR-1 expression in simulation predicted that DSCR-1 reduction would cause nuclear retention of dephosphorylated NFAT1 and disappearance of NFAT1 oscillation. To confirm this in ECs, DSCR-1 knockdown analysis was performed. DSCR-1 reduction indeed increased dephosphorylated NFAT1 in both the nucleus and cytoplasm, which eventually led to nuclear retention of NFAT1. Taken together, these studies suggest that DSCR-1 is a responsible critical factor for NFAT1 nucleocytoplasmic oscillation in shear stress or VEGF treated ECs. Our mathematical model successfully reproduced the experimental observations of NFAT1 dynamics. Combined mathematical and experimental approaches would provide a quantitative understanding way for the spatiotemporal NFAT1 feedback system.

UI MeSH Term Description Entries
D009124 Muscle Proteins The protein constituents of muscle, the major ones being ACTINS and MYOSINS. More than a dozen accessory proteins exist including TROPONIN; TROPOMYOSIN; and DYSTROPHIN. Muscle Protein,Protein, Muscle,Proteins, Muscle
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D004268 DNA-Binding Proteins Proteins which bind to DNA. The family includes proteins which bind to both double- and single-stranded DNA and also includes specific DNA binding proteins in serum which can be used as markers for malignant diseases. DNA Helix Destabilizing Proteins,DNA-Binding Protein,Single-Stranded DNA Binding Proteins,DNA Binding Protein,DNA Single-Stranded Binding Protein,SS DNA BP,Single-Stranded DNA-Binding Protein,Binding Protein, DNA,DNA Binding Proteins,DNA Single Stranded Binding Protein,DNA-Binding Protein, Single-Stranded,Protein, DNA-Binding,Single Stranded DNA Binding Protein,Single Stranded DNA Binding Proteins
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D042783 Endothelial Cells Highly specialized EPITHELIAL CELLS that line the HEART; BLOOD VESSELS; and lymph vessels, forming the ENDOTHELIUM. They are polygonal in shape and joined together by TIGHT JUNCTIONS. The tight junctions allow for variable permeability to specific macromolecules that are transported across the endothelial layer. Capillary Endothelial Cells,Lymphatic Endothelial Cells,Vascular Endothelial Cells,Capillary Endothelial Cell,Cell, Capillary Endothelial,Cell, Endothelial,Cell, Lymphatic Endothelial,Cell, Vascular Endothelial,Cells, Capillary Endothelial,Cells, Endothelial,Cells, Lymphatic Endothelial,Cells, Vascular Endothelial,Endothelial Cell,Endothelial Cell, Capillary,Endothelial Cell, Lymphatic,Endothelial Cell, Vascular,Endothelial Cells, Capillary,Endothelial Cells, Lymphatic,Endothelial Cells, Vascular,Lymphatic Endothelial Cell,Vascular Endothelial Cell
D050778 NFATC Transcription Factors A family of transcription factors characterized by the presence of highly conserved calcineurin- and DNA-binding domains. NFAT proteins are activated in the CYTOPLASM by the calcium-dependent phosphatase CALCINEURIN. They transduce calcium signals to the nucleus where they can interact with TRANSCRIPTION FACTOR AP-1 or NF-KAPPA B and initiate GENETIC TRANSCRIPTION of GENES involved in CELL DIFFERENTIATION and development. NFAT proteins stimulate T-CELL activation through the induction of IMMEDIATE-EARLY GENES such as INTERLEUKIN-2. NFAT Transcription Factor 1,NFAT Transcription Factor 2,NFAT Transcription Factor 3,NFAT Transcription Factor 4,NFAT Transcription Factor 5,Nuclear Factors of Activated T-Cells,NF-AT Proteins,NF-AT3 Protein,NF-AT4 Protein,NF-ATc1 Protein,NFAT Proteins,NFAT-1 Protein,NFAT-2 Protein,NFAT1 Protein,NFAT2 Protein,NFAT3 Protein,NFAT4 Protein,NFAT5 Protein,NFATC Proteins,NFATC1 Protein,NFATC1 Transcription Factor,NFATC2 Protein,NFATC2 Transcription Factor,NFATC3 Protein,NFATC3 Transcription Factor,NFATC4 Protein,NFATC4 Transcription Factor,NFATL1 Protein,NFATx Protein,NFATz Protein,Nuclear Factor of Activated T-Cells 5 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic,Nuclear Factor of Activated T-Cells, Cytoplasmic 1 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic 2 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic 3 Protein,Nuclear Factor of Activated T-Cells, Cytoplasmic 4 Protein,OREBP Protein,Osmotic Response Element Binding Protein,TonEBP Protein,Tonicity-Responsive Enhancer-Binding Protein,Transcription Factor NF-AT,Factor, NFATC1 Transcription,Factor, NFATC2 Transcription,Factor, NFATC3 Transcription,NF AT Proteins,NF AT3 Protein,NF AT4 Protein,NF ATc1 Protein,NF-AT, Transcription Factor,NFAT 1 Protein,NFAT 2 Protein,Nuclear Factor of Activated T Cells 5 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic,Nuclear Factor of Activated T Cells, Cytoplasmic 1 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic 2 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic 3 Protein,Nuclear Factor of Activated T Cells, Cytoplasmic 4 Protein,Nuclear Factors of Activated T Cells,Tonicity Responsive Enhancer Binding Protein,Transcription Factor NF AT,Transcription Factor, NFATC1,Transcription Factor, NFATC2,Transcription Factor, NFATC3,Transcription Factor, NFATC4,Transcription Factors, NFATC
D019703 Calcineurin A CALCIUM and CALMODULIN-dependent serine/threonine protein phosphatase that is composed of the calcineurin A catalytic subunit and the calcineurin B regulatory subunit. Calcineurin has been shown to dephosphorylate a number of phosphoproteins including HISTONES; MYOSIN LIGHT CHAIN; and the regulatory subunits of CAMP-DEPENDENT PROTEIN KINASES. It is involved in the regulation of signal transduction and is the target of an important class of immunophilin-immunosuppressive drug complexes. Calcineurin A,Calcineurin B,Protein Phosphatase-2B,Protein Phosphatase 3,Protein Phosphatase 3 Catalytic Subunit,Protein Phosphatase 3 Regulatory Subunit,Phosphatase 3, Protein,Protein Phosphatase 2B
D021581 Active Transport, Cell Nucleus Gated transport mechanisms by which proteins or RNA are moved across the NUCLEAR MEMBRANE. Nuclear Export,Nuclear Import,Nuclear Transport,Nucleocytoplasmic Transport,Nucleo-cytoplasmic Transport,Export, Nuclear,Import, Nuclear,Nucleo cytoplasmic Transport,Transport, Nuclear,Transport, Nucleo-cytoplasmic,Transport, Nucleocytoplasmic,Transports, Nucleo-cytoplasmic

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