Results 261 to 270 of about 23,536 (303)
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Adenylate cyclase activity oscillations as signals for cell aggregation in Dictyostelium discoideum
Nature, 1977As 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.
W, Roos, C, Scheidegger, G, Gerish
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The Journal of Immunology, 2023
Abstract Dendritic cells (DCs) are disseminated throughout organisms and serve as sentinels, organizing immune responses to infection, tissue damage, and cancer. DCs play a crucial role bridging innate and adaptive immune systems and elicit a tailored adaptive immune response to the types of threats they encounter. Manipulation of DCs is
N Groot +2 more
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Abstract Dendritic cells (DCs) are disseminated throughout organisms and serve as sentinels, organizing immune responses to infection, tissue damage, and cancer. DCs play a crucial role bridging innate and adaptive immune systems and elicit a tailored adaptive immune response to the types of threats they encounter. Manipulation of DCs is
N Groot +2 more
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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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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
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The European Physical Journal B, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yi, Q. Z. +3 more
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zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yi, Q. Z. +3 more
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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.
Ping Lu +7 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.
Ping Lu +7 more
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Neuron, 1991
Intercellular Ca2+ signaling in primary cultures of glial cells was investigated with digital fluorescence video imaging. Mechanical stimulation of a single cell induced a wave of increased [Ca2+]i that was communicated to surrounding cells. This was followed by asynchronous Ca2+ oscillations in some cells.
A C, Charles +3 more
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Intercellular Ca2+ signaling in primary cultures of glial cells was investigated with digital fluorescence video imaging. Mechanical stimulation of a single cell induced a wave of increased [Ca2+]i that was communicated to surrounding cells. This was followed by asynchronous Ca2+ oscillations in some cells.
A C, Charles +3 more
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On the effect of circadian oscillations on biochemical cell signaling by NF−κB
Journal of Theoretical Biology, 2013We report the results of a numerical investigation of a mathematical model for NF-κB oscillations, described by a set of ordinary nonlinear differential equations, when perturbed by a circadian oscillation. The main result is that a circadian rhythm, even when it represents a weak perturbation, enhances the signaling capabilities of NF-κB oscillations.
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Journal of Cell Science, 1978
ABSTRACT Cells of Dictyostelium discoideum known to release cyclic AMP (cAMP) rhythmically in the form of pulses, change with the same period of about 8 min the pH of their medium. The pH is used here as an indicator to investigate the effect of externally added cAMP pulses on the oscillations.
D, Malchow, V, Nanjundiah, G, Gerisch
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ABSTRACT Cells of Dictyostelium discoideum known to release cyclic AMP (cAMP) rhythmically in the form of pulses, change with the same period of about 8 min the pH of their medium. The pH is used here as an indicator to investigate the effect of externally added cAMP pulses on the oscillations.
D, Malchow, V, Nanjundiah, G, Gerisch
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Role of mitochondria in Ca2+ oscillations and shape of Ca2+ signals in pancreatic acinar cells
Biochemical Pharmacology, 2002We 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
C, Camello-Almaraz +3 more
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