Article
Fisheries
Camila Gomes de Oliveira, Jose Fernando Lopez-Olmeda, Leandro Santos Costa, Amanda Hastenreiter do Espirito Santo, Fabio Aremil Costa dos Santos, Ronald Kennedy Luz, Paula Adriane Perez Ribeiro
Summary: This study evaluated the gastrointestinal digestion patterns of Nile tilapia through examining stomach weight, enzyme activity, and daily rhythm of protein digestion. The study found that food passage in the gastrointestinal tract influences protein hydrolysis and correlates with proteolytic enzyme activity over a 20-hour period. Additionally, there is rhythmicity in the activities of acid protease, trypsin, and chymotrypsin, with distinct acrophases located throughout the light phase.
Article
Entomology
Joydeep De, Abhishek Chatterjee
Summary: The ability to perceive and respond to time is crucial for animals' survival. Animals use internal clocks to track daily time and synchronize with external day-night cycles. A small group of neurons in the brain is responsible for perceiving and responding to daily and annual time.
Article
Biology
Ruby Kim, Thomas P. Witelski
Summary: This paper investigates the dynamics of dopamine in the circadian timekeeping system and explores the disruptions in the daily rhythmicity of dopamine caused by decoupling and quasiperiodic behaviors. The imbalance of dopamine is often associated with disrupted circadian rhythms, and this model provides new insights into the link between the circadian clock and dopamine, which can be used to study the impact of circadian rhythms on the dopaminergic system and develop therapeutic strategies.
MATHEMATICAL BIOSCIENCES
(2022)
Review
Biochemistry & Molecular Biology
Andrew Salazar, Joerg von Hagen
Summary: Periodically oscillating biological processes, such as circadian rhythms, play a crucial role in tissue pathology, organismal health, and molecular mechanisms. Recent reports challenge the prevailing hierarchical model by suggesting that light can independently affect peripheral circadian clocks. However, there is a lack of comprehensive overview regarding these processes in the skin. This review highlights the molecular circadian clock machinery and factors governing it, and emphasizes the link between circadian rhythm, immunological processes, and skin homeostasis as well as its impact on the skin.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Physiology
Aarti Jagannath, Simona Di Pretoro, Farid Ebrahimjee, Suzanne Ftouni, Lewis Taylor, Russell G. Foster, Sridhar Vasudevan
Summary: This study demonstrates that the adenosine antagonist CT1500 can affect circadian entrainment in mice by regulating the transcription of clock genes and phase-shifting the circadian clock. The administration of CT1500 enhances the mice's adaptation to shifted light dark cycles and can entrain the circadian clock to a 24-hour rhythm. These findings suggest that CT1500 may be a potential treatment for circadian entrainment disorders.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Physiology
Xiang-lan Jiang, Zhe Ren, Xiao-xia Hai, Ling Zhang, Zhi-gang Wang, Fei Lyu
Summary: Light is crucial for the synchronization of organism's rhythms with natural photoperiod, however, artificial light at night disrupts this synchronization, affecting fitness-related behaviors. This study focuses on the impact of artificial light at night on a parasitic beetle's locomotor activity and oviposition capacity. The results show that the beetle's locomotor activity is higher in darkness and lower under illumination, with two peaks reflecting light-mediated changes. The beetles' circadian rhythms and active percentage are influenced by illumination duration and temperature, and chronic exposure to bright artificial light at night decreases their oviposition capacity.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Multidisciplinary Sciences
Chip Sisson, Michael Seifu Bahiru, Emily N. C. Manoogian, Eric L. Bittman
Summary: The study reveals the role of Cry1 in phase shifting and longevity in the face of heart disease. The Cry1-deficient animals show increased phase volatility but not accelerated circadian clock. Additionally, phase shifts can eliminate the shortened lifespan effect of cardiomyopathy in these mutants.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Review
Neurosciences
Jens Hannibal
Summary: The article discusses the two light perception systems in mammalian eyes, image detecting system and non-image forming system (NIF). It focuses on the anatomy of NIF in the eye and its neuronal projection to the brain. The development and functions of NIF, as well as the challenges it poses to humans and animals in modern society, are highlighted.
FRONTIERS IN NEUROSCIENCE
(2021)
Article
Chemistry, Analytical
Vuong Hung Truong, Jihwan Myung
Summary: This article introduces a system called LocoBox, which is easy to construct and operate, for recording day-night locomotor activities of animals and controlling environmental light. The system utilizes economical components and flexible entrainment scenarios, and can be used for long-term recording in regular home cages.
Article
Physiology
Wojciech Krzeptowski, Lucyna Walkowicz, Ewelina Krzeptowska, Edyta Motta, Kacper Witek, Joanna Szramel, Terence Al Abaquita, Zbigniew Baster, Zenon Rajfur, Ezio Rosato, Vassilis Stratoulias, Tapio Heino, Elzbieta M. Pyza
Summary: The study found that Drosophila MANF is expressed in various clusters of clock neurons and its silencing affects locomotor activity rhythm in light:dark and constant darkness conditions. It is important for the morphology of clock neurons and their dendritic arborizations in the visual system, as well as for maintaining circadian plasticity of neurons.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Multidisciplinary Sciences
Ashleigh G. Wilcox, R. Sonia Bains, Debbie Williams, Elizabeth Joynson, Lucie Vizor, Peter L. Oliver, Elizabeth S. Maywood, Michael H. Hastings, Gareth Banks, Patrick M. Nolan
Summary: The study describes a mouse mutant with the central pacemaker SCN genetically ablated, leading to arrhythmicity in circadian rhythms and metabolic parameters, although the mutants could still anticipate food availability. Despite disruptions to SCN cell identity and circuitry, the mutants' activity levels were altered and other zeitgebers could not restore rhythmicity.
Article
Nutrition & Dietetics
Jorge R. Soliz-Rueda, Raul Lopez-Fernandez-Sobrino, Francisca Isabel Bravo, Gerard Aragones, Manuel Suarez, Begona Muguerza
Summary: Variations in the light/dark cycle and obesogenic diets can cause physiological and behavioral disorders. Proanthocyanidins have been found to modulate biological rhythms. This study aimed to evaluate the use of GSPE to mitigate disruption caused by a sudden photoperiod change in healthy and CAF-diet obese rats. The results showed that GSPE can attenuate the changes caused by the photoperiod disruption.
Article
Biology
Ruby Kim, H. Frederik Nijhout, Michael C. Reed
Summary: The circadian clock in the mammalian brain regulates important physiological functions and is linked to neurological conditions related to dopamine imbalances. A mathematical model is used to explore the reciprocal influence between dopamine and the circadian clock, specifically the role of dopamine receptor D1 signaling in circadian entrainment. The effects of phase shifts, photoperiod, and therapeutic potential are studied, providing insights into the underlying mechanisms and potential treatments.
MATHEMATICAL BIOSCIENCES
(2023)
Article
Behavioral Sciences
Georgia Watt, Tim Karl, Rose Chesworth
Summary: Circadian rhythm has significant impacts on the physiological domains and behavior expression in mice, such as body temperature, hormone levels, and immune function. However, the effects on cognitive behavior are not well-established, and there is limited research on the impact of circadian rhythm on operant responding in mice.
BEHAVIOURAL BRAIN RESEARCH
(2023)
Article
Multidisciplinary Sciences
Gregor Schalm, Kristina Bruns, Nina Drachenberg, Nathalie Geyer, Nicholas S. Foulkes, Cristiano Bertolucci, Gabriele Gerlach
Summary: This study reveals the behavioral shifts and gene expression patterns from larvae to adults in clown anemonefish, providing insights into settlement timing and endogenous clock mechanisms.
SCIENTIFIC REPORTS
(2021)