Results 291 to 300 of about 1,477,713 (327)
Adenylate cyclase activity oscillations as signals for cell aggregation in Dictyostelium discoideum
Nature, 1977 As well as acting as a chemotactic factor1 cyclic AMP stimulates cells of Dictyostelium discoideum to differentiate after the end of growth into aggregation-competent cells. These differentiation signals have a temporal pattern : pulses are efficient signals, whereas continuous administration of cyclic AMP may even have an adverse effect2,3.
Werner Roos +2 more
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Oscillations in NF-κB Signaling Control the Dynamics of Gene Expression
Science, 2004Signaling by the transcription factor nuclear factor kappa B (NF-κB) involves its release from inhibitor kappa B (IκB) in the cytosol, followed by translocation into the nucleus.
D. E. Nelson +18 more
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Oscillation and noise determine signal transduction in shark multimodal sensory cells
Nature, 1994Oscillating membrane potentials that generate rhythmic impulse patterns are considered to be of particular significance for neuronal information processing. In contrast, noise is usually seen as a disturbance which limits the accuracy of information transfer.
Hans A. Braun +5 more
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Calcium signalling in non-excitable cells: Notes on oscillations and store refilling
Cell Calcium, 1989Technical advances in studying cellular calcium concentrations, and discoveries about many aspects of signal transduction have transformed this field of biology since this Journal was launched a decade ago. At that time monitoring of the key variable, cytoplasmic free Ca2+ concentration [Ca2+]i, was possible with aequorin or arsenazo ill mainly in ...
T.J. Hallam, Timothy J. Rink
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Small signal cell stability with focus on inter-cell oscillations in the web-of-cells framework
2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), 2017The paper aims at describing observables used in small signal stability assessment based on Energy-Sorted Prony's method focusing at area and inter-area level of the power system. Presented research studies are based on a new way of power system operation, namely Web-of-cell concept, devised within FP7 IRP ELECTRA.
Artjoms Obushevs, Michal Kosmecki
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Journal of Cellular Physiology, 2021
AbstractA persistent basal tone in the internal anal sphincter (IAS) is essential for keeping the anal canal closed and fecal continence; its inhibition via the rectoanal inhibitory reflex (RAIR) is required for successful defecation. However, cellular signals underlying the IAS basal tone remain enigmatic.
Lawrence M. Lifshitz +8 more
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AbstractA persistent basal tone in the internal anal sphincter (IAS) is essential for keeping the anal canal closed and fecal continence; its inhibition via the rectoanal inhibitory reflex (RAIR) is required for successful defecation. However, cellular signals underlying the IAS basal tone remain enigmatic.
Lawrence M. Lifshitz +8 more
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Role of NHE1 in calcium signaling and cell proliferation in human CNS pericytes.
American Journal of Physiology. Heart and Circulatory Physiology, 2008The central nervous system (CNS) pericytes play an important role in brain microcirculation. Na(+)/H(+) exchanger isoform 1 (NHE1) has been suggested to regulate the proliferation of nonvascular cells through the regulation of intracellular pH, Na ...
Kuniyuki Nakamura +9 more
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Role of mitochondria in Ca2+ oscillations and shape of Ca2+ signals in pancreatic acinar cells
Biochemical Pharmacology, 2002 We studied the role of mitochondria in Ca(2+) signals in fura-2 loaded exocrine pancreatic acinar cells. Mitochondrial depolarization in response to carbonylcyanide-p-tryfluoromethoxyphenyl hydrazone or rotenone (assessed by confocal microscopy using rhodamine-123) induced a partial but statistically significant reduction in the decay of Ca(2+) signals
Cristina Camello‐Almaraz +3 more
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Combining Genetics and Cell Biology to Crack the Code of Plant Cell Calcium Signaling
Science's STKE, 2001Plant hormones, light receptors, pathogens, and abiotic signals trigger elevations in the cytosolic calcium concentration, which mediate physiological and developmental responses.
G. J. Allen, J. Schroeder
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Experientia, 1992
We investigate how the introduction of cells oscillating periodically affects the behaviour of a suspension of Dictyostelium discoideum amoebae undergoing chaotic oscillations of cyclic AMP. The analysis of a model indicates that a tiny proportion of periodic cells suffices to transform chaos into periodic oscillations in such suspensions.
Li, Yue-Xian +4 more
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We investigate how the introduction of cells oscillating periodically affects the behaviour of a suspension of Dictyostelium discoideum amoebae undergoing chaotic oscillations of cyclic AMP. The analysis of a model indicates that a tiny proportion of periodic cells suffices to transform chaos into periodic oscillations in such suspensions.
Li, Yue-Xian +4 more
openaire +3 more sources