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  1. Article ; Online: Circadian modification network of a core clock driver BMAL1 to harmonize physiology from brain to peripheral tissues.

    Tamaru, Teruya / Takamatsu, Ken

    Neurochemistry international

    2018  Volume 119, Page(s) 11–16

    Abstract: Circadian clocks dictate various physiological functions by brain SCN (a central clock) -orchestrating the temporal harmony of peripheral clocks of tissues/organs in the whole body, with adaptability to environments by resetting their timings. ... ...

    Abstract Circadian clocks dictate various physiological functions by brain SCN (a central clock) -orchestrating the temporal harmony of peripheral clocks of tissues/organs in the whole body, with adaptability to environments by resetting their timings. Dysfunction of this circadian adaptation system (CAS) occasionally causes/exacerbates diseases. CAS is based on cell-autonomous molecular clocks, which oscillate via a core transcriptional/translational feedback loop with clock genes/proteins, e.g., BMAL1: CLOCK circadian transcription driver and CRY1/2 and PER1/2 suppressors, and is modulated by various regulatory loops including clock protein modifications. Among mutants with a single clock gene, BMAL1-deficient mice exhibit the most drastic loss of circadian functions. Here, we highlight on numerous circadian protein modifications of mammalian BMAL1, e.g., multiple phosphorylations, SUMOylation, ubiquitination, acetylation, O-GlcNAcylation and S-nitrosylation, which mutually interplay to control molecular clocks and coordinate physiological functions from the brain to peripheral tissues through the input and output of the clocks.
    MeSH term(s) ARNTL Transcription Factors/metabolism ; Animals ; Brain/metabolism ; CLOCK Proteins/metabolism ; Circadian Clocks/physiology ; Circadian Rhythm/physiology ; Humans ; Period Circadian Proteins/metabolism
    Chemical Substances ARNTL Transcription Factors ; Period Circadian Proteins ; CLOCK Proteins (EC 2.3.1.48)
    Language English
    Publishing date 2018-01-03
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 283190-9
    ISSN 1872-9754 ; 0197-0186
    ISSN (online) 1872-9754
    ISSN 0197-0186
    DOI 10.1016/j.neuint.2017.12.013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Circadian adaptation to cell injury stresses: a crucial interplay of BMAL1 and HSF1.

    Tamaru, Teruya / Ikeda, Masaaki

    The journal of physiological sciences : JPS

    2016  Volume 66, Issue 4, Page(s) 303–306

    Abstract: The circadian clock system confers daily anticipatory physiological processes with the ability to be reset by environmental cues. This "circadian adaptation system" (CAS), driven by cell-autonomous molecular clocks, orchestrates various rhythmic ... ...

    Abstract The circadian clock system confers daily anticipatory physiological processes with the ability to be reset by environmental cues. This "circadian adaptation system" (CAS), driven by cell-autonomous molecular clocks, orchestrates various rhythmic physiological processes in the entire body. Hence, the dysfunction of these clocks exacerbates various diseases, which may partially be due to the impairment of protective pathways. If this is the case, how does the CAS respond to cell injury stresses that are critical in maintaining health and life by evoking protective pathways? To address this question, here we review and discuss recent evidence revealing life-protective (pro-survival) molecular networks between clock (e.g., BMAL1, CLOCK, and PER2) and adaptation (e.g., HSF1, Nrf2, NF-κB, and p53) pathways, which are evoked by various cell injury stresses (e.g., heat, reactive oxygen species, and UV). The CK2 protein kinase-integrated interplay of the BMAL1 (clock) and HSF1 (heat-shock response) pathways is one of the crucial events in CAS.
    MeSH term(s) ARNTL Transcription Factors/metabolism ; Adaptation, Physiological/physiology ; Animals ; Circadian Clocks/physiology ; Circadian Rhythm/physiology ; Heat-Shock Proteins/metabolism ; Humans ; Oxidative Stress/physiology ; Reactive Oxygen Species/metabolism
    Chemical Substances ARNTL Transcription Factors ; Heat-Shock Proteins ; Reactive Oxygen Species
    Language English
    Publishing date 2016-02-24
    Publishing country Japan
    Document type Journal Article ; Review
    ZDB-ID 2234472-X
    ISSN 1880-6562 ; 1880-6546
    ISSN (online) 1880-6562
    ISSN 1880-6546
    DOI 10.1007/s12576-016-0436-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Class 3 PI3K coactivates the circadian clock to promote rhythmic de novo purine synthesis.

    Alkhoury, Chantal / Henneman, Nathaniel F / Petrenko, Volodymyr / Shibayama, Yui / Segaloni, Arianna / Gadault, Alexis / Nemazanyy, Ivan / Le Guillou, Edouard / Wolide, Amare Desalegn / Antoniadou, Konstantina / Tong, Xin / Tamaru, Teruya / Ozawa, Takeaki / Girard, Muriel / Hnia, Karim / Lutter, Dominik / Dibner, Charna / Panasyuk, Ganna

    Nature cell biology

    2023  Volume 25, Issue 7, Page(s) 975–988

    Abstract: Metabolic demands fluctuate rhythmically and rely on coordination between the circadian clock and nutrient-sensing signalling pathways, yet mechanisms of their interaction remain not fully understood. Surprisingly, we find that class 3 ... ...

    Abstract Metabolic demands fluctuate rhythmically and rely on coordination between the circadian clock and nutrient-sensing signalling pathways, yet mechanisms of their interaction remain not fully understood. Surprisingly, we find that class 3 phosphatidylinositol-3-kinase (PI3K), known best for its essential role as a lipid kinase in endocytosis and lysosomal degradation by autophagy, has an overlooked nuclear function in gene transcription as a coactivator of the heterodimeric transcription factor and circadian driver Bmal1-Clock. Canonical pro-catabolic functions of class 3 PI3K in trafficking rely on the indispensable complex between the lipid kinase Vps34 and regulatory subunit Vps15. We demonstrate that although both subunits of class 3 PI3K interact with RNA polymerase II and co-localize with active transcription sites, exclusive loss of Vps15 in cells blunts the transcriptional activity of Bmal1-Clock. Thus, we establish non-redundancy between nuclear Vps34 and Vps15, reflected by the persistent nuclear pool of Vps15 in Vps34-depleted cells and the ability of Vps15 to coactivate Bmal1-Clock independently of its complex with Vps34. In physiology we find that Vps15 is required for metabolic rhythmicity in liver and, unexpectedly, it promotes pro-anabolic de novo purine nucleotide synthesis. We show that Vps15 activates the transcription of Ppat, a key enzyme for the production of inosine monophosphate, a central metabolic intermediate for purine synthesis. Finally, we demonstrate that in fasting, which represses clock transcriptional activity, Vps15 levels are decreased on the promoters of Bmal1 targets, Nr1d1 and Ppat. Our findings open avenues for establishing the complexity for nuclear class 3 PI3K signalling for temporal regulation of energy homeostasis.
    MeSH term(s) Circadian Clocks/genetics ; Phosphatidylinositol 3-Kinases/genetics ; Phosphatidylinositol 3-Kinases/metabolism ; Vacuolar Sorting Protein VPS15/genetics ; Vacuolar Sorting Protein VPS15/metabolism ; ARNTL Transcription Factors/genetics ; ARNTL Transcription Factors/metabolism ; Purines ; Lipids
    Chemical Substances Phosphatidylinositol 3-Kinases (EC 2.7.1.-) ; Vacuolar Sorting Protein VPS15 (EC 2.7.11.1) ; ARNTL Transcription Factors ; Purines ; Lipids
    Language English
    Publishing date 2023-07-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 1474722-4
    ISSN 1476-4679 ; 1465-7392
    ISSN (online) 1476-4679
    ISSN 1465-7392
    DOI 10.1038/s41556-023-01171-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Transgenic rats expressing dominant negative BMAL1 showed circadian clock amplitude reduction and rapid recovery from jet lag.

    Minami, Yoichi / Yoshikawa, Tomoko / Nagano, Mamoru / Koinuma, Satoshi / Morimoto, Tadamitsu / Fujioka, Atsuko / Furukawa, Keiichi / Ikegami, Keisuke / Tatemizo, Atsuhiro / Egawa, Kentaro / Tamaru, Teruya / Taniguchi, Taizo / Shigeyoshi, Yasufumi

    The European journal of neuroscience

    2021  Volume 53, Issue 6, Page(s) 1783–1793

    Abstract: The circadian rhythms are endogenous rhythms of about 24 h, and are driven by the circadian clock. The clock centre locates in the suprachiasmatic nucleus. Light signals from the retina shift the circadian rhythm in the suprachiasmatic nucleus, but there ...

    Abstract The circadian rhythms are endogenous rhythms of about 24 h, and are driven by the circadian clock. The clock centre locates in the suprachiasmatic nucleus. Light signals from the retina shift the circadian rhythm in the suprachiasmatic nucleus, but there is a robust part of the suprachiasmatic nucleus that causes jet lag after an abrupt shift of the environmental lighting condition. To examine the effect of attenuated circadian rhythm on the duration of jet lag, we established a transgenic rat expressing BMAL1 dominant negative form under control by mouse Prnp-based transcriptional regulation cassette [BMAL1 DN (+)]. The transgenic rats became active earlier than controls, just after light offset. Compared to control rats, BMAL1 DN (+) rats showed smaller circadian rhythm amplitudes in both behavioural and Per2 promoter driven luciferase activity rhythms. A light pulse during the night resulted in a larger phase shift of behavioural rhythm. Furthermore, at an abrupt shift of the light-dark cycle, BMAL1 DN (+) rat showed faster entrainment to the new light-dark cycle compared to controls. The circadian rhythm has been regarded as a limit cycle phenomenon, and our results support the hypothesis that modification of the amplitude of the circadian limit cycle leads to alteration in the length of the phase shift.
    MeSH term(s) ARNTL Transcription Factors ; Animals ; Circadian Clocks ; Circadian Rhythm ; Jet Lag Syndrome ; Mice ; Rats ; Rats, Transgenic ; Suprachiasmatic Nucleus
    Chemical Substances ARNTL Transcription Factors ; Arntl protein, rat
    Language English
    Publishing date 2021-02-25
    Publishing country France
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 645180-9
    ISSN 1460-9568 ; 0953-816X
    ISSN (online) 1460-9568
    ISSN 0953-816X
    DOI 10.1111/ejn.15085
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Cooperative interaction among BMAL1, HSF1, and p53 protects mammalian cells from UV stress.

    Kawamura, Genki / Hattori, Mitsuru / Takamatsu, Ken / Tsukada, Teruyo / Ninomiya, Yasuharu / Benjamin, Ivor / Sassone-Corsi, Paolo / Ozawa, Takeaki / Tamaru, Teruya

    Communications biology

    2018  Volume 1, Page(s) 204

    Abstract: The circadian clock allows physiological systems to adapt to their changing environment by synchronizing their timings in response to external stimuli. Previously, we reported clock-controlled adaptive responses to heat-shock and oxidative stress and ... ...

    Abstract The circadian clock allows physiological systems to adapt to their changing environment by synchronizing their timings in response to external stimuli. Previously, we reported clock-controlled adaptive responses to heat-shock and oxidative stress and showed how the circadian clock interacts with BMAL1 and HSF1. Here, we present a similar clock-controlled adaptation to UV damage. In response to UV irradiation, HSF1 and tumor suppressor p53 regulate the expression of the clock gene
    Language English
    Publishing date 2018-11-22
    Publishing country England
    Document type Journal Article
    ISSN 2399-3642
    ISSN (online) 2399-3642
    DOI 10.1038/s42003-018-0209-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Cooperative interaction among BMAL1, HSF1, and p53 protects mammalian cells from UV stress

    Genki Kawamura / Mitsuru Hattori / Ken Takamatsu / Teruyo Tsukada / Yasuharu Ninomiya / Ivor Benjamin / Paolo Sassone-Corsi / Takeaki Ozawa / Teruya Tamaru

    Communications Biology, Vol 1, Iss 1, Pp 1-

    2018  Volume 13

    Abstract: Genki Kawamura et al. demonstrate that cells are protected against UV stress through cooperative interactions among circadian clock, heat shock response, and a tumor suppression mechanism. This study reports another protective role of circadian clock as ... ...

    Abstract Genki Kawamura et al. demonstrate that cells are protected against UV stress through cooperative interactions among circadian clock, heat shock response, and a tumor suppression mechanism. This study reports another protective role of circadian clock as an adaptation strategy against cellular stress.
    Keywords Biology (General) ; QH301-705.5
    Language English
    Publishing date 2018-11-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: The clock components Period2, Cryptochrome1a, and Cryptochrome2a function in establishing light-dependent behavioral rhythms and/or total activity levels in zebrafish.

    Hirayama, Jun / Alifu, Yikelamu / Hamabe, Rin / Yamaguchi, Sho / Tomita, Jun / Maruyama, Yusuke / Asaoka, Yoichi / Nakahama, Ken-Ichi / Tamaru, Teruya / Takamatsu, Ken / Takamatsu, Nobuhiko / Hattori, Atsuhiko / Nishina, Sachiko / Azuma, Noriyuki / Kawahara, Atsuo / Kume, Kazuhiko / Nishina, Hiroshi

    Scientific reports

    2019  Volume 9, Issue 1, Page(s) 196

    Abstract: The circadian clock generates behavioral rhythms to maximize an organism's physiological efficiency. Light induces the formation of these rhythms by synchronizing cellular clocks. In zebrafish, the circadian clock components Period2 (zPER2) and ... ...

    Abstract The circadian clock generates behavioral rhythms to maximize an organism's physiological efficiency. Light induces the formation of these rhythms by synchronizing cellular clocks. In zebrafish, the circadian clock components Period2 (zPER2) and Cryptochrome1a (zCRY1a) are light-inducible, however their physiological functions are unclear. Here, we investigated the roles of zPER2 and zCRY1a in regulating locomotor activity and behavioral rhythms. zPer2/zCry1a double knockout (DKO) zebrafish displayed defects in total locomotor activity and in forming behavioral rhythms when briefly exposed to light for 3-h. Exposing DKO zebrafish to 12-h light improved behavioral rhythm formation, but not total activity. Our data suggest that the light-inducible circadian clock regulator zCRY2a supports rhythmicity in DKO animals exposed to 12-h light. Single cell imaging analysis revealed that zPER2, zCRY1a, and zCRY2a function in synchronizing cellular clocks. Furthermore, microarray analysis of DKO zebrafish showed aberrant expression of genes involved regulating cellular metabolism, including ATP production. Overall, our results suggest that zPER2, zCRY1a and zCRY2a help to synchronize cellular clocks in a light-dependent manner, thus contributing to behavioral rhythm formation in zebrafish. Further, zPER2 and zCRY1a regulate total physical activity, likely via regulating cellular energy metabolism. Therefore, these circadian clock components regulate the rhythmicity and amount of locomotor behavior.
    MeSH term(s) Animals ; CLOCK Proteins/physiology ; Circadian Clocks/physiology ; Cryptochromes/physiology ; Light ; Locomotion ; Period Circadian Proteins/physiology ; Single-Cell Analysis ; Zebrafish/metabolism ; Zebrafish Proteins/metabolism ; Zebrafish Proteins/physiology
    Chemical Substances Cryptochromes ; Period Circadian Proteins ; Zebrafish Proteins ; cry1a protein, zebrafish ; CLOCK Proteins (EC 2.3.1.48)
    Language English
    Publishing date 2019-01-17
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-018-37879-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: CRY Drives Cyclic CK2-Mediated BMAL1 Phosphorylation to Control the Mammalian Circadian Clock.

    Tamaru, Teruya / Hattori, Mitsuru / Honda, Kousuke / Nakahata, Yasukazu / Sassone-Corsi, Paolo / van der Horst, Gijsbertus T J / Ozawa, Takeaki / Takamatsu, Ken

    PLoS biology

    2015  Volume 13, Issue 11, Page(s) e1002293

    Abstract: Intracellular circadian clocks, composed of clock genes that act in transcription-translation feedback loops, drive global rhythmic expression of the mammalian transcriptome and allow an organism to anticipate to the momentum of the day. Using a novel ... ...

    Abstract Intracellular circadian clocks, composed of clock genes that act in transcription-translation feedback loops, drive global rhythmic expression of the mammalian transcriptome and allow an organism to anticipate to the momentum of the day. Using a novel clock-perturbing peptide, we established a pivotal role for casein kinase (CK)-2-mediated circadian BMAL1-Ser90 phosphorylation (BMAL1-P) in regulating central and peripheral core clocks. Subsequent analysis of the underlying mechanism showed a novel role of CRY as a repressor for protein kinase. Co-immunoprecipitation experiments and real-time monitoring of protein-protein interactions revealed that CRY-mediated periodic binding of CK2β to BMAL1 inhibits BMAL1-Ser90 phosphorylation by CK2α. The FAD binding domain of CRY1, two C-terminal BMAL1 domains, and particularly BMAL1-Lys537 acetylation/deacetylation by CLOCK/SIRT1, were shown to be critical for CRY-mediated BMAL1-CK2β binding. Reciprocally, BMAL1-Ser90 phosphorylation is prerequisite for BMAL1-Lys537 acetylation. We propose a dual negative-feedback model in which a CRY-dependent CK2-driven posttranslational BMAL1-P-BMAL1 loop is an integral part of the core clock oscillator.
    MeSH term(s) ARNTL Transcription Factors/chemistry ; ARNTL Transcription Factors/genetics ; ARNTL Transcription Factors/metabolism ; Animals ; Casein Kinase II/chemistry ; Casein Kinase II/genetics ; Casein Kinase II/metabolism ; Cell Line ; Cells, Cultured ; Circadian Clocks ; Cryptochromes/chemistry ; Cryptochromes/genetics ; Cryptochromes/metabolism ; Embryo, Mammalian/cytology ; Humans ; Mice ; Mice, Knockout ; Mice, Transgenic ; Mutation ; Phosphorylation ; Protein Interaction Domains and Motifs ; Protein Processing, Post-Translational ; Recombinant Fusion Proteins/chemistry ; Recombinant Fusion Proteins/metabolism ; Recombinant Proteins/chemistry ; Recombinant Proteins/metabolism
    Chemical Substances ARNTL Transcription Factors ; Bmal1 protein, mouse ; Cry1 protein, mouse ; Cry2 protein, mouse ; Cryptochromes ; Recombinant Fusion Proteins ; Recombinant Proteins ; CSNK2A1 protein, human (EC 2.7.11.1) ; Casein Kinase II (EC 2.7.11.1)
    Language English
    Publishing date 2015-11-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2126776-5
    ISSN 1545-7885 ; 1544-9173
    ISSN (online) 1545-7885
    ISSN 1544-9173
    DOI 10.1371/journal.pbio.1002293
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Cell-based screen identifies a new potent and highly selective CK2 inhibitor for modulation of circadian rhythms and cancer cell growth.

    Oshima, Tsuyoshi / Niwa, Yoshimi / Kuwata, Keiko / Srivastava, Ashutosh / Hyoda, Tomoko / Tsuchiya, Yoshiki / Kumagai, Megumi / Tsuyuguchi, Masato / Tamaru, Teruya / Sugiyama, Akiko / Ono, Natsuko / Zolboot, Norjin / Aikawa, Yoshiki / Oishi, Shunsuke / Nonami, Atsushi / Arai, Fumio / Hagihara, Shinya / Yamaguchi, Junichiro / Tama, Florence /
    Kunisaki, Yuya / Yagita, Kazuhiro / Ikeda, Masaaki / Kinoshita, Takayoshi / Kay, Steve A / Itami, Kenichiro / Hirota, Tsuyoshi

    Science advances

    2019  Volume 5, Issue 1, Page(s) eaau9060

    Abstract: Compounds targeting the circadian clock have been identified as potential treatments for clock-related diseases, including cancer. Our cell-based phenotypic screen revealed uncharacterized clock-modulating compounds. Through affinity-based target ... ...

    Abstract Compounds targeting the circadian clock have been identified as potential treatments for clock-related diseases, including cancer. Our cell-based phenotypic screen revealed uncharacterized clock-modulating compounds. Through affinity-based target deconvolution, we identified GO289, which strongly lengthened circadian period, as a potent and selective inhibitor of CK2. Phosphoproteomics identified multiple phosphorylation sites inhibited by GO289 on clock proteins, including PER2 S693. Furthermore, GO289 exhibited cell type-dependent inhibition of cancer cell growth that correlated with cellular clock function. The x-ray crystal structure of the CK2α-GO289 complex revealed critical interactions between GO289 and CK2-specific residues and no direct interaction of GO289 with the hinge region that is highly conserved among kinases. The discovery of GO289 provides a direct link between the circadian clock and cancer regulation and reveals unique design principles underlying kinase selectivity.
    MeSH term(s) Animals ; CLOCK Proteins/metabolism ; Carcinoma, Renal Cell/metabolism ; Carcinoma, Renal Cell/pathology ; Casein Kinase II/antagonists & inhibitors ; Cell Line, Tumor ; Cell Proliferation/drug effects ; Circadian Clocks/drug effects ; Circadian Rhythm/drug effects ; Crystallography, X-Ray ; Drug Screening Assays, Antitumor/methods ; HEK293 Cells ; Humans ; Kidney Neoplasms/metabolism ; Kidney Neoplasms/pathology ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Phosphorylation/drug effects
    Chemical Substances CLOCK Proteins (EC 2.3.1.48) ; CSNK2A1 protein, human (EC 2.7.11.1) ; Casein Kinase II (EC 2.7.11.1)
    Language English
    Publishing date 2019-01-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.aau9060
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  10. Article ; Online: Synchronization of circadian Per2 rhythms and HSF1-BMAL1:CLOCK interaction in mouse fibroblasts after short-term heat shock pulse.

    Teruya Tamaru / Mitsuru Hattori / Kousuke Honda / Ivor Benjamin / Takeaki Ozawa / Ken Takamatsu

    PLoS ONE, Vol 6, Iss 9, p e

    2011  Volume 24521

    Abstract: Circadian rhythms are the general physiological processes of adaptation to daily environmental changes, such as the temperature cycle. A change in temperature is a resetting cue for mammalian circadian oscillators, which are possibly regulated by the ... ...

    Abstract Circadian rhythms are the general physiological processes of adaptation to daily environmental changes, such as the temperature cycle. A change in temperature is a resetting cue for mammalian circadian oscillators, which are possibly regulated by the heat shock (HS) pathway. The HS response (HSR) is a universal process that provides protection against stressful conditions, which promote protein-denaturation. Heat shock factor 1 (HSF1) is essential for HSR. In the study presented here, we investigated whether a short-term HS pulse can reset circadian rhythms. Circadian Per2 rhythm and HSF1-mediated gene expression were monitored by a real-time bioluminescence assay for mPer2 promoter-driven luciferase and HS element (HSE; HSF1-binding site)-driven luciferase activity, respectively. By an optimal duration HS pulse (43°C for approximately 30 minutes), circadian Per2 rhythm was observed in the whole mouse fibroblast culture, probably indicating the synchronization of the phases of each cell. This rhythm was preceded by an acute elevation in mPer2 and HSF1-mediated gene expression. Mutations in the two predicted HSE sites adjacent (one of them proximally) to the E-box in the mPer2 promoter dramatically abolished circadian mPer2 rhythm. Circadian Per2 gene/protein expression was not observed in HSF1-deficient cells. These findings demonstrate that HSF1 is essential to the synchronization of circadian rhythms by the HS pulse. Importantly, the interaction between HSF1 and BMAL1:CLOCK heterodimer, a central circadian transcription factor, was observed after the HS pulse. These findings reveal that even a short-term HS pulse can reset circadian rhythms and cause the HSF1-BMAL1:CLOCK interaction, suggesting the pivotal role of crosstalk between the mammalian circadian and HSR systems.
    Keywords Medicine ; R ; Science ; Q
    Subject code 571
    Language English
    Publishing date 2011-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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