Results 11 to 20 of about 15,542 (119)
Circadian Clocks: Evolution in the Shadows [PDF]
Current Biology, 2009 As scientists, we strive for highly controlled conditions. The real world, however, is noisy. Complex networks are a coping mechanism for an erratic environment.
Merrow, Martha, Maas, Marc F. P. M.
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Circadian Biology: Clocks within Clocks [PDF]
Current Biology, 2005 A small cluster of approximately 20,000 neurons in the ventral hypothalamus provide the body with key time-keeping signals and drive circadian rhythms. This circadian clock exhibits surprisingly complex substructures, with inputs from the retina, and outputs to other brain structures.
Piggins, Hugh D. +1 more
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The Circadian Clock in Lepidoptera [PDF]
Frontiers in Physiology, 2021 With approximately 160,000 identified species of butterflies and moths, Lepidoptera are among the most species-rich and diverse insect orders. Lepidopteran insects have fundamental ecosystem functions as pollinators and valuable food sources for countless animals.
Brady D. +3 more
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Nutrients, 2023 Rhythmicity is a fundamental characteristic of every living organism [...]
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The circadian clock in mammals [PDF]
The Journal of Headache and Pain, 2000 The basic physiological and anatomical basis for circadian rhythms in mammalian behaviour and physiology is introduced. The pathways involved in photic entrainment of the circadian clock are discussed in relation of new findings that identify the molecules that are involved in signalling between the environment and the clock.
ZORDAN, MAURO AGOSTINO, KYRIACOU C. P.
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Neurodegeneration and the Circadian Clock [PDF]
Frontiers in Aging Neuroscience, 2017 Despite varied etiologies and symptoms, several neurodegenerative diseases-specifically, Alzheimer's (AD), Parkinson's (PD), and Huntington's diseases (HDs)-share the common feature of abnormal circadian rhythms, such as those in behavior (e.g., disrupted sleep/wake cycles), physiological processes (e.g., diminished hormone release) and biochemical ...
Hood, Suzanne, Amir, Shimon
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Circadian Clocks and Pregnancy [PDF]
Frontiers in Endocrinology, 2014 The recognition that 24-h rhythmic processes (“circadian”) underlie many endocrine functions has added a fascinating new temporal dimension to our appreciation of their complexity. Research from various laboratories has revealed circadian gene expression in multiple tissues in the reproductive system of non-pregnant and pregnant mammals.
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Circadian clocks in the ovary [PDF]
Trends in Endocrinology & Metabolism, 2010 Clock gene expression has been observed in tissues of the hypothalamic-pituitary-gonadal (HPG) axis. Whereas the contribution of hypothalamic oscillators to the timing of reproductive biology is well known, the role of peripheral oscillators like those in the ovary is less clear.
Michael T, Sellix, Michael, Menaker
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The circadian clock of cyanobacteria [PDF]
BioEssays, 2000 A circadian clock, with physiological characteristics similar to those of eukaryotes, functions in the photosynthetic prokaryote, cyanobacteria. The molecular mechanism of this clock has been efficiently dissected using a luciferase reporter gene that reports the status of the clock.
T, Kondo, M, Ishiura
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The Circadian Clock in the Kidney [PDF]
Journal of the American Society of Nephrology, 2011 Circadian variations in renal function were first described in the 19th century, and GFR, renal blood flow, urine production, and electrolyte excretion exhibit daily oscillations. These clinical observations are well established, but the underlying mechanisms that govern circadian fluctuations in kidney are not fully understood. Here we provide a brief
Lisa R, Stow, Michelle L, Gumz
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