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https://www.readbyqxmd.com/read/29150901/expression-of-the-clock-gene-rev-erb%C3%AE-in-the-brain-controls-the-circadian-organization-of-food-intake-and-locomotor-activity-but-not-daily-variations-of-energy-metabolism
#1
Satish Sen, Stéphanie Dumont, Dominique Sage-Ciocca, Sophie Reibel, Paul de Goede, Andries Kalsbeek, Etienne Challet
The nuclear receptor REV-ERBα is part of the molecular clock mechanism and thought to be involved in a variety of biological processes within metabolically active peripheral tissues as well. To investigate whether Rev-erbα (also known as Nr1d1) in the brain plays a role in the daily variations of energy metabolism, feeding behaviour and the sleep-wake cycle, we studied mice with global (GKO) or brain (BKO) deletion of Rev-erbα. Mice were studied both in a light-dark cycle and constant darkness, and 24-h variations of Respiratory quotient (RQ) and energy expenditure, as well as the temporal patterns of rest-activity and feeding behavior were recorded...
November 18, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/29111822/repercussions-of-hypo-and-hyperthyroidism-on-the-heart-circadian-clock
#2
Rodrigo A Peliciari-Garcia, Paula Bargi-Souza, Martin E Young, Maria Tereza Nunes
Myocardial gene expression and metabolism fluctuate over the course of the day in association with changes in energy supply and demand. Time-of-day-dependent oscillations in myocardial processes have been linked to the intrinsic cardiomyocyte circadian clock. Triiodothyronine (T3) is an important modulator of heart metabolism and function. Recently, our group has reported time-of-day-dependent rhythms in cardiac T3 sensitivity, as well as, T3-mediated acute alterations on core clock components. Hypo and hyperthyroidism are the second most prevalent endocrine disease worldwide...
November 7, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28992598/global-transcriptomic-analysis-of-zebrafish-in-response-to-embryonic-exposure-to-three-antidepressants-amitriptyline-fluoxetine-and-mianserin
#3
Minghong Wu, Shuai Liu, Lei Hu, Haidong Qu, Chenyuan Pan, Penghui Lei, Yingjia Shen, Ming Yang
Antidepressants are among the most commonly detected pharmaceuticals in aqueous systems, and, as emerging organic pollutants, may exert negative effects on non-target aquatic organisms. Previously, it has been revealed that antidepressant exposure significantly inhibits the growth and development of fish during their early developmental stages. Thus, in the present study, we aimed to identify and compare the underlying mechanisms of action of different antidepressants at the transcriptional level using zebrafish (Danio rerio) embryos...
September 28, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28951217/assessing-molecular-initiating-events-mies-key-events-kes-and-modulating-factors-mfs-for-styrene-responses-in-mouse-lungs-using-whole-genome-gene-expression-profiling-following-1-day-and-multi-week-exposures
#4
Melvin E Andersen, George Cruzan, Michael B Black, Salil N Pendse, Darol Dodd, James S Bus, Satinder S Sarang, Marcy I Banton, Robbie Waites, Patrick D McMullen
Styrene increased lung tumors in mice at chronic inhalation exposures of 20ppm and greater. MIEs, KEs and MFs were examined using gene expression in three strains of male mice (the parental C57BL/6 strain, a CYP2F2(-/-) knock out and a CYP2F2(-/-) transgenic containing human CYP2F1, 2A13 and 2B6). Exposures were for 1-day and 1, 4 and 26weeks. After 1-day exposures at 1, 5, 10, 20, 40 and 120ppm significant increases in differentially expressed genes (DEGs) occurred only in parental strain lungs where there was already an increase in DEGs at 5ppm and then many thousands of DEGs by 120ppm...
November 15, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28944015/signatures-of-selection-in-mammalian-clock-genes-with-coding-trinucleotide-repeats-implications-for-studying-the-genomics-of-high-pace-adaptation
#5
Melanie B Prentice, Jeff Bowman, Jillian L Lalor, Michelle M McKay, Lindsay A Thomson, Cristen M Watt, Andrew G McAdam, Dennis L Murray, Paul J Wilson
Climate change is predicted to affect the reproductive ecology of wildlife; however, we have yet to understand if and how species can adapt to the rapid pace of change. Clock genes are functional genes likely critical for adaptation to shifting seasonal conditions through shifts in timing cues. Many of these genes contain coding trinucleotide repeats, which offer the potential for higher rates of change than single nucleotide polymorphisms (SNPs) at coding sites, and, thus, may translate to faster rates of adaptation in changing environments...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28797239/nutrient-supply-affects-the-mrna-expression-profile-of-the-porcine-skeletal-muscle
#6
Tainã Figueiredo Cardoso, Raquel Quintanilla, Joan Tibau, Marta Gil, Emilio Mármol-Sánchez, Olga González-Rodríguez, Rayner González-Prendes, Marcel Amills
BACKGROUND: The genetic basis of muscle fat deposition in pigs is not well known. So far, we have only identified a limited number of genes involved in the absorption, transport, storage and catabolism of lipids. Such information is crucial to interpret, from a biological perspective, the results of genome-wide association analyses for intramuscular fat content and composition traits. Herewith, we have investigated how the ingestion of food changes gene expression in the gluteus medius muscle of Duroc pigs...
August 10, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28765524/bmal1-regulates-inflammatory-responses-in-macrophages-by-modulating-enhancer-rna-transcription
#7
Yumiko Oishi, Shinichiro Hayashi, Takayuki Isagawa, Motohiko Oshima, Atsushi Iwama, Shigeki Shimba, Hitoshi Okamura, Ichiro Manabe
Bmal1 (encoded by Arntl gene) is a core circadian clock gene that regulates various genes involved in circadian rhythm. Although Bmal1 is expressed rhythmically in macrophages, the role of Bmal1 in the regulation of their cellular function remains insufficiently understood. Here, we report that Bmal1 regulates time-dependent inflammatory responses following Toll-like receptor 4 (TLR4) activation by modulating enhancer activity. Global transcriptome analysis indicated that deletion of Arntl perturbed the time-dependent inflammatory responses elicited by TLR4 activation by Kdo2-lipid A (KLA)...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28599788/nr1d1-enhances-oxidative-dna-damage-by-inhibiting-parp1-activity
#8
Na-Lee Ka, Tae-Young Na, Mi-Ock Lee
Cancer cells exhibit an elevated intracellular level of reactive oxygen species (ROS) because of their accelerated metabolism, mitochondrial dysfunction, and antioxidant deficit. The oxidative stress in cancer cells may provide clinical benefits, which can be associated with a better response to anticancer therapies. Therefore, identifying the regulatory pathway of oxidative stress in cancer cells is important in the development of therapeutic targets that enhance sensitivity to ROS-generating anticancer therapies...
October 15, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28533986/atorvastatin-alters-the-expression-of-genes-related-to-bile-acid-metabolism-and-circadian-clock-in-livers-of-mice
#9
Wen-Kai Li, Huan Li, Yuan-Fu Lu, Ying-Ying Li, Zidong Donna Fu, Jie Liu
AIM: Atorvastatin is a HMG-CoA reductase inhibitor used for hyperlipidemia. Atorvastatin is generally safe but may induce cholestasis. The present study aimed to examine the effects of atorvastatin on hepatic gene expression related to bile acid metabolism and homeostasis, as well as the expression of circadian clock genes in livers of mice. METHODS: Adult male mice were given atorvastatin (10, 30, and 100 mg/kg, po) daily for 30 days, and blood biochemistry, histopathology, and gene expression were examined...
2017: PeerJ
https://www.readbyqxmd.com/read/28513593/jak3-deficiency-blocks-innate-lymphoid-cell-development
#10
M L Robinette, M Cella, J B Telliez, T K Ulland, A D Barrow, K Capuder, S Gilfillan, L-L Lin, L D Notarangelo, M Colonna
Loss-of-function mutations in the tyrosine kinase JAK3 cause autosomal recessive severe combined immunodeficiency (SCID). Defects in this form of SCID are restricted to the immune system, which led to the development of immunosuppressive JAK inhibitors. We find that the B6.Cg-Nr1d1(tm1Ven)/LazJ mouse line purchased from Jackson Laboratories harbors a spontaneous mutation in Jak3, generating a SCID phenotype and an inability to generate antigen-independent professional cytokine-producing innate lymphoid cells (ILCs)...
May 17, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28511934/repeated-manganese-administration-produced-abnormal-expression-of-circadian-clock-genes-in-the-hypothalamus-and-liver-of-rats
#11
Huan Li, Ximin Fan, Ying Luo, Sheng Song, Jie Liu, Qiyuan Fan
Manganese (Mn) neurotoxicity displays non-motor dysfunction and motor impairment like Parkinson's disease (PD), and is called as Manganism. Circadian disruption is a non-motor symptom found in PD and Manganism. Clock genes are essential to drive and maintain circadian rhythm, but little is known about Mn exposure on circadian clock genes expression. Both the brain and liver are targets of Mn, we hypothesize that repeated Mn administration could affect clock gene expression in the hypothalamus and livers. Male Sprague-Dawley rats were intraperitoneally injected Mn(2+) 1mg and 5mg/kg as MnCl2·4H2O, every other day for 30 days...
September 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28419375/transcriptional-profiling-of-cholinergic-neurons-from-basal-forebrain-identifies-changes-in-expression-of-genes-between-sleep-and-wake
#12
Elena V Nikonova, Jason DA Gilliland, Keith Q Tanis, Alexei A Podtelezhnikov, Alison M Rigby, Raymond J Galante, Eva M Finney, David J Stone, John J Renger, Allan I Pack, Christopher J Winrow
Study objective: To assess differences in gene expression in cholinergic basal forebrain cells between sleeping and sleep-deprived mice sacrificed at the same time of day. Methods: Tg(ChAT-eGFP)86Gsat mice expressing enhanced green fluorescent protein (eGFP) under control of the choline acetyltransferase (Chat) promoter were utilized to guide laser capture of cholinergic cells in basal forebrain. Messenger RNA expression levels in these cells were profiled using microarrays...
June 1, 2017: Sleep
https://www.readbyqxmd.com/read/28412351/effect-of-apoa4-on-serpina3-mediated-by-nuclear-receptors-nr4a1-and-nr1d1-in-hepatocytes
#13
Yupeng Zhang, Jing He, Jing Zhao, Min Xu, Danwen Lou, Patrick Tso, Zongfang Li, Xiaoming Li
ApoA4 exerts anti-inflammatory effects, but the mechanism remains unclear. SERPINA3 is a member of the serine proteinase inhibitor gene family, and has been shown to be involved in anti-inflammation and associated with a number of human diseases. In this study, we revealed that ApoA4 stimulates the gene expression of SERPINA3 in mouse hepatocytes both in vivo and in vitro, in a dose- and time-dependent manner. The transcriptional response of SERPINA3 to ApoA4 is regulated through the binding of ApoA4 with nuclear receptors NR4A1 and NR1D1 on the SERPINA3 promoter, which was verified with ChIP, Luciferase activity assay and RNA interference-mediated NR4A1 or NR1D1 gene knockdown...
May 27, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28392392/combining-transcriptomics-and-pbpk-modeling-indicates-a-primary-role-of-hypoxia-and-altered-circadian-signaling-in-dichloromethane-carcinogenicity-in-mouse-lung-and-liver
#14
Melvin E Andersen, Michael B Black, Jerry L Campbell, Salil N Pendse, Harvey J Clewell Iii, Lynn H Pottenger, James S Bus, Darol E Dodd, Daniel C Kemp, Patrick D McMullen
Dichloromethane (DCM) is a lung and liver carcinogen in mice at inhalation exposures≥2000ppm. The modes of action (MOA) of these responses have been attributed to formation of genotoxic, reactive metabolite(s). Here, we examined gene expression in lung and liver from female B6C3F1 mice exposed to 0, 100, 500, 2000, 3000 and 4000ppm DCM for 90days. We also simulated dose measures - rates of DCM oxidation to carbon monoxide (CO) in lung and liver and expected blood carboxyhemoglobin (HbCO) time courses with a PBPK model inclusive of both conjugation and oxidation pathways...
October 1, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28296937/effects-of-circadian-clock-genes-and-health-related-behavior-on-metabolic-syndrome-in-a-taiwanese-population-evidence-from-association-and-interaction-analysis
#15
Eugene Lin, Po-Hsiu Kuo, Yu-Li Liu, Albert C Yang, Chung-Feng Kao, Shih-Jen Tsai
Increased risk of developing metabolic syndrome (MetS) has been associated with the circadian clock genes. In this study, we assessed whether 29 circadian clock-related genes (including ADCYAP1, ARNTL, ARNTL2, BHLHE40, CLOCK, CRY1, CRY2, CSNK1D, CSNK1E, GSK3B, HCRTR2, KLF10, NFIL3, NPAS2, NR1D1, NR1D2, PER1, PER2, PER3, REV1, RORA, RORB, RORC, SENP3, SERPINE1, TIMELESS, TIPIN, VIP, and VIPR2) are associated with MetS and its individual components independently and/or through complex interactions in a Taiwanese population...
2017: PloS One
https://www.readbyqxmd.com/read/28262759/role-of-a-circadian-relevant-gene-nr1d1-in-brain-development-possible-involvement-in-the-pathophysiology-of-autism-spectrum-disorders
#16
Masahide Goto, Makoto Mizuno, Ayumi Matsumoto, Zhiliang Yang, Eriko F Jimbo, Hidenori Tabata, Takanori Yamagata, Koh-Ichi Nagata
In our previous study, we screened autism spectrum disorder (ASD) patients with and without sleep disorders for mutations in the coding regions of circadian-relevant genes, and detected mutations in several clock genes including NR1D1. Here, we further screened ASD patients for NR1D1 mutations and identified three novel mutations including a de novo heterozygous one c.1499 G > A (p.R500H). We then analyzed the role of Nr1d1 in the development of the cerebral cortex in mice. Acute knockdown of mouse Nr1d1 with in utero electroporation caused abnormal positioning of cortical neurons during corticogenesis...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28249904/nr1d1-recruitment-to-sites-of-dna-damage-inhibits-repair-and-is-associated-with-chemosensitivity-of-breast-cancer
#17
Na-Lee Ka, Tae-Young Na, Hyelin Na, Min-Ho Lee, Han-Su Park, Sewon Hwang, Il Yong Kim, Je Kyung Seong, Mi-Ock Lee
DNA repair capacity is critical for survival of cancer cells upon therapeutic DNA damage and thus is an important determinant of susceptibility to chemotherapy in cancer patients. In this study, we identified a novel function of nuclear receptor NR1D1 in DNA repair, which enhanced chemosensitivity in breast cancer cells. NR1D1 inhibited both nonhomologous end joining and homologous recombination double-strand breaks repair, and delayed the clearance of γH2AX DNA repair foci that formed after treatment of doxorubicin...
May 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28095742/lithium-response-in-bipolar-disorders-and-core-clock-genes-expression
#18
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/28045078/positive-association-between-physical-activity-and-per3-expression-in-older-adults
#19
Masaki Takahashi, Atsushi Haraguchi, Yu Tahara, Natsumi Aoki, Mayuko Fukazawa, Kumpei Tanisawa, Tomoko Ito, Takashi Nakaoka, Mitsuru Higuchi, Shigenobu Shibata
The circadian clock regulates many physiological functions including physical activity and feeding patterns. In addition, scheduled exercise and feeding themselves can affect the circadian clock. The purpose of the present study was to investigate the relationship between physical/feeding activity and expression of clock genes in hair follicle cells in older adults. Twenty adult men (age, 68 ± 7 years, mean ± SE) were examined in this cross-sectional study. Prior to hair follicle cell collection, the participants were asked to wear a uniaxial accelerometer for one week...
January 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27997226/dysregulation-of-metallothionein-and-circadian-genes-in-human-hepatocellular-carcinoma
#20
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
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