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  1. Research

    Daily blood feeding rhythms of laboratory-reared North American Culex pipiens

    Blood feeding by free-living insect vectors of disease is rhythmic and can be used to predict when infectious bites will occur. These daily rhythms can also be targeted by control measures, as in insecticide-t...

    Megan L Fritz, Edward D Walker, Aaron J Yunker and Ian Dworkin

    Journal of Circadian Rhythms 2014 12:1

    Published on: 22 January 2014

  2. Research

    Daily cycling of nitric oxide synthase (NOS) in the hippocampus of pigeons (C. livia)

    Nitric oxide synthase (NOS) is essential for the synthesis of nitric oxide (NO), a non-conventional neurotransmitter with an important role in synaptic plasticity underlying processes of hippocampus-dependent ...

    Aline V Machado-Nils, Larissa OM de Faria, André S Vieira, Simone A Teixeira, Marcelo N Muscará and Elenice AM Ferrari

    Journal of Circadian Rhythms 2013 11:12

    Published on: 1 November 2013

  3. Research

    Synaptophysin is involved in resetting of the mammalian circadian clock

    Mammals can adapt to changing light/dark conditions by advancing or delaying their circadian clock phase. Light pulses evoke changes in gene expression and neuronal activity in the suprachiasmatic nuclei (SCN)...

    Marie Aramendy, Sascha Seibert, Philipp Treppmann, Karin Richter, Gudrun Ahnert-Hilger and Urs Albrecht

    Journal of Circadian Rhythms 2013 11:11

    Published on: 1 October 2013

  4. Research

    An out-of-lab trial: a case example for the effect of intensive exercise on rhythms of human clock gene expression

    Although out-of-lab investigation of the human circadian clock at the clock gene expression level remains difficult, a recent method using hair follicle cells might be useful. While exercise may function as an...

    Akihiko Okamoto, Takuro Yamamoto, Ritsuko Matsumura, Koichi Node and Makoto Akashi

    Journal of Circadian Rhythms 2013 11:10

    Published on: 3 September 2013

  5. Research

    Circadian behavior of mice deficient in PER1/PML or PER2/PML

    Our recent studies demonstrate that the murine homolog of the human tumor suppressor promyelocytic leukemia (PML) regulates circadian behavior of mice. To further gather insight into PML’s contribution to circ...

    Takao Miki, Misty Chen-Goodspeed, Zhaoyang Zhao and Cheng Chi Lee

    Journal of Circadian Rhythms 2013 11:9

    Published on: 28 August 2013

  6. Research

    Diurnal and nutritional adjustments of intracellular Ca2+ release channels and Ca2+ ATPases associated with restricted feeding schedules in the rat liver

    Intracellular calcium is a biochemical messenger that regulates part of the metabolic adaptations in the daily fed-fast cycle. The aim of this study was to characterize the 24-h variations of the liver ryanodi...

    Adrián Báez-Ruiz, Karina Cázares-Gómez, Olivia Vázquez-Martínez, Raúl Aguilar-Roblero and Mauricio Díaz-Muñoz

    Journal of Circadian Rhythms 2013 11:8

    Published on: 20 August 2013

  7. Review

    Wavelet analysis of circadian and ultradian behavioral rhythms

    We review time-frequency methods that can be useful in quantifying circadian and ultradian patterns in behavioral records. These records typically exhibit details that may not be captured through commonly used...

    Tanya L Leise

    Journal of Circadian Rhythms 2013 11:5

    Published on: 1 July 2013

  8. Research

    A tryptophan-rich breakfast and exposure to light with low color temperature at night improve sleep and salivary melatonin level in Japanese students

    Epidemiological studies in Japan have documented an association between morning type and a tryptophan-rich breakfast followed by exposure to sunlight in children. The association may be mediated by enhanced me...

    Kai Wada, Shota Yata, Osami Akimitsu, Milada Krejci, Teruki Noji, Miyo Nakade, Hitomi Takeuchi and Tetsuo Harada

    Journal of Circadian Rhythms 2013 11:4

    Published on: 25 May 2013

  9. Research

    FMR1, circadian genes and depression: suggestive associations or false discovery?

    There are several indications that malfunctions of the circadian clock contribute to depression. To search for particular circadian gene polymorphisms associated with depression, diverse polymorphisms were gen...

    Daniel F Kripke, Caroline M Nievergelt, Gregory J Tranah, Sarah S Murray, Katharine M Rex, Alexandra P Grizas, Elizabeth K Hahn, Heon-Jeong Lee, John R Kelsoe and Lawrence E Kline

    Journal of Circadian Rhythms 2013 11:3

    Published on: 23 March 2013

  10. Research

    Characterization of locomotor activity circadian rhythms in athymic nude mice

    The relation between circadian dysregulation and cancer incidence and progression has become a topic of major interest over the last decade. Also, circadian timing has gained attention regarding the use of chr...

    Natalia Paladino, José M Duhart, Malena L Mul Fedele and Diego A Golombek

    Journal of Circadian Rhythms 2013 11:2

    Published on: 1 February 2013

  11. Research

    Diurnal-and sex-related difference of metallothionein expression in mice

    Metallothionein (MT) is a small, cysteine-rich, metal-binding protein that plays an important role in protecting against toxicity of heavy metal and chemicals. This study was aimed to define diurnal and sex va...

    Dan Zhang, Tao Jin, Yi-qiao Xu, Yuan-Fu Lu, Qin Wu, Yu-Kun Jennifer Zhang and Jie Liu

    Journal of Circadian Rhythms 2012 10:5

    Published on: 24 July 2012

  12. Research

    Differential roles of breakfast only (one meal per day) and a bigger breakfast with a small dinner (two meals per day) in mice fed a high-fat diet with regard to induced obesity and lipid metabolism

    Recent studies on humans and rodents have suggested that the timing of food intake plays an important role in circadian regulation and metabolic health. Consumption of high-fat foods during the inactive period...

    Yuta Fuse, Akiko Hirao, Hiroaki Kuroda, Makiko Otsuka, Yu Tahara and Shigenobu Shibata

    Journal of Circadian Rhythms 2012 10:4

    Published on: 15 May 2012

  13. Research

    Chronotolerance study of the antiepileptic drug valproic acid in mice

    Valproic acid (VPA) is an antiepileptic drug widely used for the treatment of absence seizures and generalized tonic-clonic seizures. The present work aims to study whether VPA-induced toxicity varies accordin...

    Wafa Ben-Cherif, Ichrak Dridi, Karim Aouam, Mossadok Ben-Attia, Alain Reinberg and Naceur A Boughattas

    Journal of Circadian Rhythms 2012 10:3

    Published on: 10 May 2012

  14. Research

    A dynamic model of circadian rhythms in rodent tail skin temperature for comparison of drug effects

    Menopause-associated thermoregulatory dysfunction can lead to symptoms such as hot flushes severely impairing quality of life of affected women. Treatment effects are often assessed by the ovariectomized rat m...

    Dorothee Girbig, Karsten Keller, Katja Prelle, Vladimir Patchev, Richardus Vonk and Bernd-Wolfgang Igl

    Journal of Circadian Rhythms 2012 10:1

    Published on: 5 January 2012

  15. Research

    Measuring the impact of apnea and obesity on circadian activity patterns using functional linear modeling of actigraphy data

    Actigraphy provides a way to objectively measure activity in human subjects. This paper describes a novel family of statistical methods that can be used to analyze this data in a more comprehensive way.

    Jia Wang, Hong Xian, Amy Licis, Elena Deych, Jimin Ding, Jennifer McLeland, Cristina Toedebusch, Tao Li, Stephen Duntley and William Shannon

    Journal of Circadian Rhythms 2011 9:11

    Published on: 13 October 2011

  16. Research

    Relationship between daylength and suicide in Finland

    Many previous studies have documented seasonal variation in suicides globally. We re-assessed the seasonal variation of suicides in Finland and tried to relate it to the seasonal variation in daylength and amb...

    Laura Hiltunen, Kirsi Suominen, Jouko Lönnqvist and Timo Partonen

    Journal of Circadian Rhythms 2011 9:10

    Published on: 23 September 2011

  17. Research

    Polymorphisms in melatonin synthesis pathways: possible influences on depression

    It has been reported that rs4446909, a single nucleotide polymorphism (SNP) in the promoter of acetylserotonin methyltransferase (ASMT), influences the expression of the ASMT enzyme. The common G allele is associ...

    Daniel F Kripke, Caroline M Nievergelt, Greg J Tranah, Sarah S Murray, Michael J McCarthy, Katharine M Rex, Neeta Parimi and John R Kelsoe

    Journal of Circadian Rhythms 2011 9:8

    Published on: 9 August 2011

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