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https://www.readbyqxmd.com/read/28196586/the-blue-light-dependent-phosphorylation-of-the-cce-domain-determines-the-photosensitivity-of-arabidopsis-cry2
#1
Qin Wang, William D Barshop, Mingdi Bian, Ajay A Vashisht, Reqing He, Xuhong Yu, Bin Liu, Paula Nguyen, Xuanming Liu, Xiaoying Zhao, James A Wohlschlegel, Chentao Lin
No abstract text is available yet for this article.
February 13, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28186127/optogenetic-control-of-cellular-forces-and-mechanotransduction
#2
Léo Valon, Ariadna Marín-Llauradó, Thomas Wyatt, Guillaume Charras, Xavier Trepat
Contractile forces are the end effectors of cell migration, division, morphogenesis, wound healing and cancer invasion. Here we report optogenetic tools to upregulate and downregulate such forces with high spatiotemporal accuracy. The technology relies on controlling the subcellular activation of RhoA using the CRY2/CIBN light-gated dimerizer system. We fused the catalytic domain (DHPH domain) of the RhoA activator ARHGEF11 to CRY2-mCherry (optoGEF-RhoA) and engineered its binding partner CIBN to bind either to the plasma membrane or to the mitochondrial membrane...
February 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/28181538/epigenetic-editing-of-ascl1-gene-in-neural-stem-cells-by-optogenetics
#3
Chiao-Ling Lo, Samrat Roy Choudhury, Joseph Irudayaraj, Feng C Zhou
Enzymes involved in epigenetic processes such as methyltransferases or demethylases are becoming highly utilized for their persistent DNA or histone modifying efficacy. Herein, we have developed an optogenetic toolbox fused to the catalytic domain (CD) of DNA-methyltransferase3A (DNMT3A-CD) or Ten-Eleven Dioxygenase-1 (TET1-CD) for loci-specific alteration of the methylation state at the promoter of Ascl1 (Mash1), a candidate proneuron gene. Optogenetical protein pairs, CRY2 linked to DNMT3A-CD or TET1-CD and CIB1 fused to a Transcription Activator-Like Element (TALE) locating an Ascl1 promoter region, were designed for site specific epigenetic editing...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28155916/dual-origins-of-the-intracellular-circadian-calcium-rhythm-in-the-suprachiasmatic-nucleus
#4
Ryosuke Enoki, Daisuke Ono, Shigeru Kuroda, Sato Honma, Ken-Ichi Honma
In mammals, the master circadian clock is located in the suprachiasmatic nucleus (SCN), where most neurons show circadian rhythms of intracellular Ca(2+) levels. However, the origin of these Ca(2+) rhythms remains largely unknown. In this study, we successfully monitored the intracellular circadian Ca(2+) rhythms together with the circadian PER2 and firing rhythms in a single SCN slice ex vivo, which enabled us to explore the origins. The phase relation between the circadian PER2 and Ca(2+) rhythms, but not between the circadian PER2 and firing rhythms, was significantly altered in Cry1/Cry2 double knockout mice, which display a loss of intercellular synchronization in the SCN...
February 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28117839/the-genetic-overlap-between-mood-disorders-and-cardiometabolic-diseases-a-systematic-review-of-genome-wide-and-candidate-gene-studies
#5
REVIEW
A T Amare, K O Schubert, M Klingler-Hoffmann, S Cohen-Woods, B T Baune
Meta-analyses of genome-wide association studies (meta-GWASs) and candidate gene studies have identified genetic variants associated with cardiovascular diseases, metabolic diseases and mood disorders. Although previous efforts were successful for individual disease conditions (single disease), limited information exists on shared genetic risk between these disorders. This article presents a detailed review and analysis of cardiometabolic diseases risk (CMD-R) genes that are also associated with mood disorders...
January 24, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28109907/circadian-gene-variants-and-breast-cancer
#6
Edyta Reszka, Monika Przybek, Olav Muurlink, Beata Pepłonska
The endogenous and self-sustained circadian rhythm generated and maintained in suprachiasmatic nucleus and peripheral tissues can coordinate various molecular, biochemical and physiological processes in living organisms resulting in the adaptation to environmental cues, e.g. light. Multifactorial breast cancer etiology also involves circadian gene alterations, especially among individuals exposed to light at night. Indeed, shift work that causes circadian disruption has been classified by the International Agency for Research on Cancer as a probable human carcinogen, group 2A...
April 1, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28096467/mir-21-mediated-radioresistance-is-via-promoting-repair-of-dna-double-strand-breaks
#7
Baocheng Hu, Xiang Wang, Suofeng Hu, Xiaomin Ying, Ping Wang, Xiangming Zhang, Jian Wang, Hongyan Wang, Ya Wang
MiR-21 as an oncogene that over-expresses in most human tumors involves radioresistance; however, the mechanism remains unclear. Here, we demonstrate that miR-21-mediated radioresistance is through promoting repair of DNA double strand breaks, which includes to facilitate both non-homologous end-joining (NHEJ) and homologous recombination repair (HRR). The miR-21-promoted NHEJ is through targeting GSK3B (a novel target of miR-21) that affects the CRY2/PP5 pathway and in turn increases DNA-PKcs activity. The miR-21-promoted HRR is through targeting both GSK3B and CDC25A (a known target of miR-21), which neutralizes the effects of targeting GSK3B-induced CDC25A increase since GSK3B promotes degradation of both CDC25A and Cyclin D1, but CDC25A and Cyclin D1 have an opposite effect on HRR...
January 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28095742/lithium-response-in-bipolar-disorders-and-core-clock-genes-expression
#8
Pierre A Geoffroy, Emmanuel Curis, Cindie Courtin, Jeverson Moreira, Thomas Morvillers, Bruno Etain, Jean-Louis Laplanche, Frank Bellivier, Cynthia Marie-Claire
OBJECTIVES: We examine if the lithium response is associated with changes in core clock genes expressions. METHODS: The effect of a therapeutic concentration of lithium (1mM) on the expression levels of 17 circadian genes, was examined in lymphoblastoid cell lines (LCLs) derived from two well-characterized groups of BD patients, defined as lithium non-responders (NR, n = 20) or excellent responders (ER, n = 16). Quantitative real-time PCR (qRT-PCR) were conducted at 2, 4 and 8 days (d2, d4, d8) with and without lithium exposure...
January 18, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28017587/knockout-rescue-embryonic-stem-cell-derived-mouse-reveals-circadian-period-control-by-quality-and-quantity-of-cry1
#9
Koji L Ode, Hideki Ukai, Etsuo A Susaki, Ryohei Narumi, Katsuhiko Matsumoto, Junko Hara, Naoshi Koide, Takaya Abe, Masato T Kanemaki, Hiroshi Kiyonari, Hiroki R Ueda
To conduct comprehensive characterization of molecular properties in organisms, we established an efficient method to produce knockout (KO)-rescue mice within a single generation. We applied this method to produce 20 strains of almost completely embryonic stem cell (ESC)-derived mice ("ES mice") rescued with wild-type and mutant Cry1 gene under a Cry1(-/-):Cry2(-/-) background. A series of both phosphorylation-mimetic and non-phosphorylation-mimetic CRY1 mutants revealed that multisite phosphorylation of CRY1 can serve as a cumulative timer in the mammalian circadian clock...
January 5, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28003802/restricted-feeding-schedules-modulate-in-a-different-manner-the-expression-of-clock-genes-in-rat-hypothalamic-nuclei
#10
Leonardo D De Araujo, Silvia L Roa, Ana C Bueno, Fernanda B Coeli-Lacchini, Clarissa S Martins, Ernane T Uchoa, Jose Antunes-Rodrigues, Lucila L Elias, Paula C Elias, Ayrton C Moreira, Margaret De Castro
Food access restriction is associated to changes in gene expression of the circadian clock system. However, there are only a few studies investigating the effects of non-photic synchronizers, such as food entrainment, on the expression of clock genes in the central oscillators. We hypothesized that different feeding restriction patterns could modulate the expression of clock genes in the suprachiasmatic nucleus (SCN) "master" clock and in extra-SCN oscillators such as the paraventricular (PVN) and arcuate (ARC) hypothalamic nuclei...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27998756/effects-of-24-epibrassinolide-and-green-light-on-plastid-gene-transcription-and-cytokinin-content-of-barley-leaves
#11
Marina V Efimova, Radomira Vankova, Victor V Kusnetsov, Raisa P Litvinovskaya, Ilya E Zlobin, Petre Dobrev, Nina P Vedenicheva, Alina L Savchuk, Raisa A Karnachuk, Natalia V Kudryakova, Vladimir V Kuznetsov
In order to evaluate whether brassinosteroids (BS) and green light regulate the transcription of plastid genes in a cross-talk with cytokinins (CKs), transcription rates of 12 plastid genes (ndhF, rrn23, rpoB, psaA, psaB, rrn16, psbA, psbD, psbK, rbcL, atpB, and trnE/trnY) as well as the accumulation of transcripts of some photoreceptors (PHYA, CRY2, CRY1A, and CRY1B) and signaling (SERK and CAS) genes were followed in detached etiolated barley leaves exposed to darkness, green or white light ±1μm 24-epibrassinolide (EBL)...
December 18, 2016: Steroids
https://www.readbyqxmd.com/read/27997226/dysregulation-of-metallothionein-and-circadian-genes-in-human-hepatocellular-carcinoma
#12
Huan Li, Yuan-Fu Lu, Hong Chen, Jie Liu
Hepatocellular carcinoma (HCC) is the major threat to human health, and disruption of circadian clock genes is implicated in hepatocarcinogenesis. This study examined the dysregulation of metallothioneins and circadian genes in achieved human HCC (n = 24), peri-HCC tissues (n = 24) as compared with normal human livers (n = 36). Total RNA was extracted and reverse transcribed. Real-time RT-qPCR was performed to determine the expression of genes of interest. The results demonstrated the downregulation of metallothionein-1 (MT-1), MT-2, and metal transcription factor-1 (MFT-1) in human HCC as compared with Peri-HCC and normal tissues...
2017: Chronobiology International
https://www.readbyqxmd.com/read/27993165/isolation-and-characterization-of-native-bacillus-thuringiensis-strains-from-saudi-arabia-with-enhanced-larvicidal-toxicity-against-the-mosquito-vector-anopheles-gambiae-s-l
#13
Talaat A El-Kersh, Ashraf M Ahmed, Yazeed A Al-Sheikh, Frédéric Tripet, Mohamed S Ibrahim, Ali A M Metwalli
BACKGROUND: Worldwide, mosquito vectors are transmitting several etiological agents of important human diseases, including malaria, causing millions of deaths every year. In Saudi Arabia, as elsewhere, vector-control is based mostly on chemical insecticides which may be toxic and cause environmental deprivation. Here, to support the development of bio-pesticide alternatives, a study was conducted to identify native Bacillus thuringiensis (Bt) isolates with improved toxicity against the malaria vector, Anopheles gambiae (s...
December 19, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27988807/effects-of-bright-light-exposure-during-daytime-on-peripheral-clock-gene-expression-in-humans
#14
Maki Sato, Tomoko Wakamura, Takeshi Morita, Akihiko Okamoto, Makoto Akashi, Takuya Matsui, Motohiko Sato
Light is the strongest synchronizer controlling circadian rhythms. The intensity and duration of light change throughout the year, thereby influencing body weight, food preferences, and melatonin secretion in humans and animals. Although the expression of clock genes has been examined using human samples, it currently remains unknown whether bright light during the daytime affects the expression of these genes in humans. Therefore, we herein investigated the effects of bright light exposure during the daytime on clock gene expression in the hair follicular and root cells of the human scalp...
December 17, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27931190/daily-rhythmicity-of-clock-gene-transcript-levels-in-fast-and-slow-muscle-fibers-from-chinese-perch-siniperca-chuatsi
#15
Ping Wu, Yu-Long Li, Jia Cheng, Lin Chen, Xin Zhu, Zhi-Guo Feng, Jian-She Zhang, Wu-Ying Chu
BACKGROUND: Clock genes are considered to be the molecular core of biological clock in vertebrates and they are directly involved in the regulation of daily rhythms in vertebrate tissues such as skeletal muscles. Fish myotomes are composed of anatomically segregated fast and slow muscle fibers that possess different metabolic and contractile properties. To date, there is no report on the characterization of the circadian clock system components of slow muscles in fish. RESULTS: In the present study, the molecular clock components (clock, arntl1/2, cry1/2/3, cry-dash, npas2, nr1d1/2, per1/2/3, rorα and tim genes) and their daily transcription levels were characterized in slow and fast muscles of Chinese perch (Siniperca chuatsi)...
December 8, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27920997/cyclic-variation-of-cellular-clock-proteins-in-the-mouse-estrous-ovary
#16
George Wiggins, Michael Legge
BACKGROUND: The mammalian ovary is controlled by a number of biological rhythms, which regulate the recruitment and release of mature oocytes. The main objective of this study was to investigate the role of cellular clock proteins during follicle maturation in the mouse estrous ovary. METHODS: Immunohistochemical (IHC) studies were performed on ovaries from 50 estrous staged mice culled at two time points of 09:00 [day] and 01:00 [mid-point of the dark cycle]. Six antibodies were used to identify the expression of core cellular clock proteins (BMAL1, CLOCK, CRY1, CRY2, PER1 and PER2) within the ovary and four follicle stages, primordial, primary, antral and corpus lutea...
October 2016: Journal of Reproduction & Infertility
https://www.readbyqxmd.com/read/27907092/unconjugated-bile-acids-influence-expression-of-circadian-genes-a-potential-mechanism-for-microbe-host-crosstalk
#17
Kalaimathi Govindarajan, John MacSharry, Patrick G Casey, Fergus Shanahan, Susan A Joyce, Cormac G M Gahan
Disruptions to circadian rhythm in mice and humans have been associated with an increased risk of obesity and metabolic syndrome. The gut microbiota is known to be essential for the maintenance of circadian rhythm in the host suggesting a role for microbe-host interactions in the regulation of the peripheral circadian clock. Previous work suggested a role for gut bacterial bile salt hydrolase (BSH) activity in the regulation of host circadian gene expression. Here we demonstrate that unconjugated bile acids, known to be generated through the BSH activity of the gut microbiota, are potentially chronobiological regulators of host circadian gene expression...
2016: PloS One
https://www.readbyqxmd.com/read/27893733/adarb1-catalyzes-circadian-a-to-i-editing-and-regulates-rna-rhythm
#18
Hideki Terajima, Hikari Yoshitane, Haruka Ozaki, Yutaka Suzuki, Shigeki Shimba, Shinya Kuroda, Wataru Iwasaki, Yoshitaka Fukada
It has been proposed that the CLOCK-ARNTL (BMAL1) complex drives circadian transcription of thousands of genes, including Per and Cry family genes that encode suppressors of CLOCK-ARNTL-dependent transcription. However, recent studies demonstrated that 70-80% of circadian-oscillating mRNAs have no obvious rhythms in their de novo transcription, indicating the potential importance of post-transcriptional regulation. Our CLOCK-ChIP-seq analysis identified rhythmic expression of adenosine deaminase, RNA-specific, B1 (Adarb1, also known as Adar2), an adenosine-to-inosine (A-to-I) RNA-editing enzyme...
January 2017: Nature Genetics
https://www.readbyqxmd.com/read/27864230/the-circadian-clock-protein-cry2-promotes-myc-degradation
#19
(no author information available yet)
CRY2 recruits SCF(FBXL3) to ubiquitinate MYC, promoting MYC degradation and preventing transformation.
January 2017: Cancer Discovery
https://www.readbyqxmd.com/read/27858334/identification-of-medaka-magnetoreceptor-and-cryptochromes
#20
Yunzhi Wang, Jianbin Chen, Feng Zhu, Yunhan Hong
Magnetoreception is a hallmark ability of animals for orientation and migration via sensing and utilizing geomagnetic fields. Magnetoreceptor (MagR) and cryptochromes (Cry) have recently been identified as the basis for magnetoreception in Drosophila. However, it has remained unknown whether MagR and Cry have conserved roles in diverse animals. Here we report the identification and expression of magr and cry genes in the fish medaka (Oryzias latipes). Cloning and sequencing identified a single magr gene, four cry genes and one cry-like gene in medaka...
November 17, 2016: Science China. Life Sciences
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