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)
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
Endocrinology & Metabolism
Erica L. Schoeller, Karen J. Tonsfeldt, McKenna Sinkovich, Rujing Shi, Pamela L. Mellon
Summary: The study revealed that loss of the circadian clock gene Bmal1 disrupts the growth hormone axis, affecting hepatic gene expression, urinary pheromone production, and behavior. GH pulsatility plays a crucial role in sexually dimorphic gene expression, with Bmal1 KO mice showing female-like GH release patterns. Disruption in serum IGF-1 and liver Igf1 in Bmal1 KO mice may contribute to altered GH release and hepatic gene transcription.
Article
Cell Biology
Antonio Fernandez-Perez, Adrian Sanz-Magro, Rosario Moratalla, Mario Vallejo
Summary: This response addresses the concerns raised by Scarpa et al. (2022) regarding the previous research findings and provides further analysis and additional results to support the original conclusions.
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
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
Cell Biology
Lewin Small, Leonidas S. Lundell, Jo Iversen, Amy M. Ehrlich, Morten Dall, Astrid L. Basse, Emilie Dalbram, Ann N. Hansen, Jonas T. Treebak, Romain Barres, Juleen R. Zierath
Summary: Seasonal light affects energy metabolism by modulating the rhythmicity of food intake, rather than melatonin.
Article
Behavioral Sciences
Heath S. Partington, Jennifer Makenzie Nutter, Jeffrey B. Eells
Summary: Disruption of Nurr1 affects the function of DA neurons and circadian rhythms, while Nurr1 plays an important role in regulating the DA phenotype. Using a Nurr1 deficient model can replicate some DA functional changes found in schizophrenia and PD, and further research is needed to understand the mechanisms regulating circadian rhythms and fluctuations in the DA phenotype.
BEHAVIOURAL BRAIN RESEARCH
(2021)
Article
Biology
Chaimaa Kinane, Hugo Calligaro, Antonin Jandot, Christine Coutanson, Nasser Haddjeri, Mohamed Bennis, Ouria Dkhissi-Benyahya
Summary: The mammalian retina contains an autonomous circadian clock that controls various aspects of retinal physiology and function, including dopamine release by amacrine cells. Bidirectional regulation between dopaminergic cells and melanopsin-expressing retinal ganglion cells has been demonstrated. The study found that dopamine modulates the molecular core of the clock through melanopsin-dependent regulation of acetylcholine retinal waves.
Review
Endocrinology & Metabolism
Hao Wang, Yuqi Yan, Ifen Hung, Chunxue Liu, Jie Yin, Liangpeng Ge, Wenkai Ren
Summary: Food allergy affects over 500 million people globally, with increasing prevalence and limited prevention and treatment methods. Research suggests that altered melatonin metabolism in allergic patients may impact allergic diseases. Melatonin can influence immune cell differentiation and function, and the severity of allergic diseases and immune system function exhibit circadian rhythmicity. This review explores the impacts of melatonin on food allergies and its underlying regulatory mechanisms, providing a theoretical reference for future prevention and treatment.
JOURNAL OF PINEAL RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Alexandre Berthier, Manuel Johanns, Francesco Paolo Zummo, Philippe Lefebvre, Bart Staels
Summary: Peroxisome proliferator-activated receptors (PPARs) play crucial roles in hepatic and whole-body energy homeostasis, with emerging evidence suggesting involvement in more processes beyond lipid and glucose metabolism. Recent studies have revealed unexpected complexity in the regulation of PPARs, including tissular zonation, cellular heterogeneity, circadian rhythms, sexual dimorphism, and species-specific features that were previously overlooked.
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR BASIS OF DISEASE
(2021)
Article
Biology
Guangyuan Liao, Amitabha Bose
Summary: This paper addresses the time and pattern of entrainment of circadian systems after an abrupt switch in the light-dark phasing. The study introduces a systematic way to derive an entrainment map and explains the behavior of reentrainment. It also investigates the dynamics of a hierarchical system with mutually coupled oscillators and explores the effect of desynchronization on reentrainment times.
MATHEMATICAL BIOSCIENCES
(2022)