Chemotaxis behavior. Medical search. Frequent questions

The best-studied model organism for bacterial chemotaxis is E. coli 24 . (nature.com)
Bacterial chemotaxis is an important survival mechanism by which motile bacteria bias their random walk trajectory to navigate chemical gradients. (aps.org)
Distinguished professor Parkinson was elected for "distinguished contributions to the field of molecular microbiology, particularly using genetic and in vivo analyses to study bacterial chemotaxis, behavior and signal transduction. (utah.edu)
Parkinson's lab studies this behavior in E. coli to understand the molecular machinery that allows the bacterial cells navigate and process their chemical environment. (utah.edu)
optional) C. V. Rao, J. R. Kirby, and A. P. Arkin, Design and diversity in bacterial chemotaxis: a comparative study in Escherichia coli and Bacillus subtilis , PLoS Biol, vol. 2, no. 2, p. (caltech.edu)

While chemotaxis has been studied extensively in E. coli , much less attention has been devoted to the diversity of bacteria with different flagellar architectures, or to motility in viscous or porous environments that more closely mimic the complexity of natural habitats. (aps.org)
With a typical throughput of above 3,000 individual trajectories in 5 minutes, we demonstrate that we can directly determine chemotactic drift velocities in diverse environments while simultaneously resolving 3D motility behavior, enabling unprecedented access to a mechanistic understanding and quantitative comparison of chemotactic strategies. (aps.org)
We highlight the power of our assay by revealing the role of lateral flagella in the opportunistic pathogen V. alginolyticus for motility and chemotaxis in hydrogels. (aps.org)
Studies in mice have shown that bitter compounds interact with TAS2R receptors on spermatids and spermatozoa, increasing intracellular calcium concentrations which may affect chemotaxis, motility, and fertilization. (pathfertility.com)
These include establishing concentration and temperature gradients to influence motility via chemotaxis and thermotaxis, or controlling the surrounding microenvironment to influence rheotaxis, magnetotaxis, and phototaxis. (microbialcell.com)

We demonstrate that the chemotaxis of bacteriabots is primarily limited by the cargo-dependent reduction of swimming speed and show that the fabrication of bacteriabots using elongated E. coli cells can be used to overcome this limitation. (nature.com)
That was how Howard unraveled the algorithmic structure of E. coli chemotaxis from stimulus input to motor output. (harvard.edu)

negative chemotaxis if the movement is in the opposite direction. (wikipedia.org)

Overview of Chemotaxis Behavior Assays in Caenorhabditis elegans. (nih.gov)

D. Horstmann , From 1970 until present: The keller-segel model in chemotaxis and its consequences. (aimsciences.org)
D. Horstmann , Generalizing the Keller-Segel model: Lyapunov functionals, steady state analysis, and blow-up results for multi-species chemotaxis models in the presence of attraction and repulsion between competitive interacting species, Journal of Nonlinear Science , 21 (2011), 231-270. (aimsciences.org)
We show the relevance of chemotaxis after making a systematic adaptation of the well-known moments technique on bounded domains (usually used for proving blow-up in Keller-Segel systems) to analyze the behavior of the cell dynamics when the chemotactic signal increases. (nottingham.edu.cn)
Our proofs involve a variety of techniques ranging from entropy methods and decay of oscillations estimates to a general description of the qualitative behavior to the hyperbolic FKPP-Keller-Segel equation. (hal.science)

Continuous and discrete periodic asymptotic behavior of solutions to a competitive chemotaxis PDEs system. (ucm.es)
Next, we compare the asymptotic behavior with and without chemotaxis. (nottingham.edu.cn)

Simply placing two nematodes together triggers mating, arguably their most complex natural behavior. (harvard.edu)
With a custom tracking microscope the researchers simultaneously recorded the behavior and neuronal activity in freely behaving nematodes from beginning to end of mating. (harvard.edu)
Trophic cascades, above- and below-ground interactions, chemotaxis of soil nematodes, and evolution of plant defense strategies. (psu.edu)

Moreover, chemotactic behavior of bacteriabots in a liquid medium with chemical gradients has remained largely unclear. (nature.com)
Chemotaxis is directional cell migration guided by extracellular chemoattractant gradients. (nih.gov)
Here we present a simple yet powerful chemotaxis assay combining a recent high-throughput 3D tracking method with microfluidically created chemical gradients. (aps.org)
Bacteria can sense and track chemical gradients in their environment with extreme precision, a behavior known as chemotaxis. (utah.edu)

K. Kanga and A. Steven , Blowup and global solutions in a chemotaxis-growth system, Nonlinear Analysis , 135 (2016), 57-72. (aimsciences.org)
Espejo, E & Suzuki, T 2017, ' Reaction enhancement by chemotaxis ', Nonlinear Analysis: Real World Applications , vol. 35, pp. 102-131. (nottingham.edu.cn)

Sub-cellular components, such as the polarity patch generated by mating yeast, may also display chemotactic behavior. (wikipedia.org)
Next, we investigate two possible chemotactic mechanisms, contact inhibition of locomotion and heterotypic interfacial tension, and demonstrate that both can drive collective chemotaxis in certain parameter regimes. (nih.gov)

The most important aspects in quality control of chemotaxis assays were described by H. Harris in the 1950s. (wikipedia.org)

00:02:10.03 that seem very complicated to us, when we think about them we can coarse-grain reduce them to, 00:02:15.21 for example, innate behaviors, or hardwired behaviors, and experiential memory. (ibiology.org)

00:02:43.09 that underpins the animal's behavior, and the experiential memories in the 00:02:47.12 interplay between that circuit. (ibiology.org)
According to the comprehensive study of animal's behavior and their senses in nature it can be concluded that the bear's sense of smell is stronger than other available intrinsic senses in nature [1]. (transpireonline.blog)

As allergies, especially those triggered by food, are becoming more and more prevalent, it is of increasing importance to fully understand the structures and dynamic behaviors of allergenic proteins along with their interactions with potential natural ligands. (bvsalud.org)
The bear smell search algorithm (BSSA) imitates both dynamic behaviors of bear based on sense of smell mechanism and the way bear moves in the search of food in thousand miles farther. (transpireonline.blog)

Cytokines influence cell behavior by binding to specific high affinity surface receptors on target cells. (nih.gov)
It is thought these receptors may be important for chemotaxis during fertilization. (pathfertility.com)
These receptors likely impact sperm behavior by helping the sperm navigate towards the egg during fertilization. (pathfertility.com)

This cellular behavior of eukaryotic cells plays a critical role in many physiological processes, such as embryogenesis, neuron patterning, angiogenesis, innate immune responses to infections, metastasis of cancer cells, and the early development of the model organism Dictyostelium . (nih.gov)
One of Dr. Xu's primary areas of research focuses on chemoattractant GPCR-mediated chemotaxis using both the model organism D. discoideum and mammalian neutrophils. (nih.gov)
Dr. Xu focused on developing and applying state-of-the-art imaging technologies to monitor the signaling network of GPCR-mediated chemotaxis in the model organism Dictyostelium discoideum. (nih.gov)

In this first part of the series, we investigate the dynamical behaviors of logistic type chemotaxis models on the half line $ \mathbb{R}^+ $, which are formally corresponding limit systems of the free boundary problems. (aimsciences.org)
For instance, it has been theoretically demonstrated that two-dimensional confluent tissues comprising mechanically uniform cells can undergo density-independent rigidity transitions, and analysis of the dynamical behavior of tissues near the critical point revealed that the transitions are geometrically controlled by the so-called cell shape parameter. (go.jp)

Here, we develop an open-source code that couples a two-dimensional Voronoi simulation for confluent cell mechanics to a dynamic chemical signal that can diffuse, advect, and/or degrade and use the code to study potential mechanisms for collective chemotaxis in cellular monolayers. (nih.gov)
In bacteria, the monopolar localization of enzymes and protein complexes can result in a bimodal distribution of enzyme activity between the dividing cells and heterogeneity of cellular behaviors. (nature.com)
00:01:03.21 I'll also explain how we're able to track behaviors and neuronal function in vivo, 00:01:09.02 and how we can use genetics to discover the molecular and cellular pathways that underpin the 00:01:13.02 cell biology of the synapse and behavior. (ibiology.org)

In multicellular organisms, chemotaxis is critical to early development (e.g., movement of sperm towards the egg during fertilization) and development (e.g., migration of neurons or lymphocytes) as well as in normal function and health (e.g., migration of leukocytes during injury or infection). (wikipedia.org)
0 becomes arbitrarily small if the chemotaxis signal is sufficiently large and the sperm and eggs are concentrated enough at the initial time. (nottingham.edu.cn)
Eggs released L-tryptophan at concentrations that triggered both activation and chemotaxis in sperm, exhibiting significant activity at levels as low as 10 -8 mol l -1 . (biologists.com)
Chemically mediated behavior may thus be a key component regulating sperm-egg interactions, whether occurring in the turbulent ocean environment or within a mammalian reproductive tract. (biologists.com)
CatSper2 is an essential gene required for sperm penetration and chemotaxis. (pathfertility.com)

Examples of 'active' taxis are chemotaxis [4] and thermotaxis [5] . (microbialcell.com)

This similarity was so pronounced, that it was possible to predict the behavior of one animal from the neuronal activity of other animals. (harvard.edu)
How organelle intercommunication is mechanistically linked to addiction-related receptor signaling and trafficking patterns, and how that further mediates features of neuronal circuitry and ultimately, behavior, is understudied. (nih.gov)

C. elegans worms exhibit a natural chemotaxis towards food cues. (iucc.ac.il)

The diversity of these interactions underlies the diversity of behavioral responses in an entire behavior. (harvard.edu)
Social interactions require awareness and understanding of the behavior of others. (stanford.edu)
Behavior and chemical ecology of multi-trophic interactions, including plant responses to below-ground herbivory and nematode. (psu.edu)

00:03:25.07 And C elegans also has behaviors that are modified by the experience of the animal. (ibiology.org)
Now, in that authoritative tradition, comes C. elegans II -- not a second edition but a book that breaks new ground and defines the current status of the field, providing a detailed molecular explanation of how development is regulated and the nervous system specifies varied aspects of behavior. (cshlpress.com)

Vlad Susoy, a postdoc in the Samuel lab, has now applied these methods to examine brain-wide mechanisms at single-neuron resolution across an entire behavioral repertoire that a brain organizes, the mating behavior of male worms. (harvard.edu)
Remarkably when looking at the activity of each neuron relative to all steps of mating behavior, virtually every neuron in the circuit emerged as functionally unique. (harvard.edu)

Hua CHEN and Xinhua ZHONG, Norm Behavior of a Parabolic-Elliptic System Modelling Chemotaxis in Three-Dimensional Domains,Preprint 2002/22, ISSN 1437-739X, Institut f?hematik, Uni Potsdam, 2002. (uni-potsdam.de)

In addition, it has been recognized that mechanisms that allow chemotaxis in animals can be subverted during cancer metastasis. (wikipedia.org)
Although particle-based models have been developed that predict important features of collective chemotaxis, the mechanisms in those models depend on particle overlaps, and so it remains unclear if they can explain behavior in confluent systems. (nih.gov)
Her research interests include the preparation and design of materials and scaffolds for in vitro and in vivo fundamental studies, and a further focus is the provision of useful tools to assess mechanisms that govern cell behavior in regenerative medicine. (ibecbarcelona.eu)

Neutrophil senses and moves to inflammatory sites through chemotaxis, provides first-line host defense during pathogen invasion, and plays critical roles in both innate and adaptive immunity. (nih.gov)

Chemotaxis and the formation of suicidal neutrophil extracellular traps (suicidal NETosis) are key functions of polymorphonuclear cells (PMNs). (uni-regensburg.de)

The authors conclude that brain-wide dynamics during a natural behavior are not a phenomenon of an isolated nervous system but are shaped by the flow of sensory inputs and motor actions as behavior unfolds. (harvard.edu)
00:02:57.15 How is it that the architecture of the nervous system facilitates behaviors? (ibiology.org)

Interplay between computational simulation and experimental verification allowed her to propose a novel model, specifically a local inhibitory model, in GPCR-mediated chemotaxis to identify new components and novel signaling pathways essential for chemotaxis. (nih.gov)
20. Stromal cell-derived factor-1 alpha and stem cell factor/kit ligand share signaling pathways in hemopoietic progenitors: a potential mechanism for cooperative induction of chemotaxis. (nih.gov)

Xu X, Wen X, Veltman DM, Keizer-Gunnink I, Pots H, Kortholt A, Jin T. GPCR-controlled membrane recruitment of negative regulator C2GAP1 locally inhibits Ras signaling for adaptation and long-range chemotaxis . (nih.gov)

The aberrant chemotaxis of leukocytes and lymphocytes also contribute to inflammatory diseases such as atherosclerosis, asthma, and arthritis. (wikipedia.org)

Like many natural behaviors in mammals and invertebrates, nematode mating is goal-directed and unfolds in a variable sequence of many stereotyped behavioral steps. (harvard.edu)

The act of using your sense of smell to navigate is called chemotaxis. (sciencebuddies.org)

Therefore, this algorithm is to predict the quality of an odor from a set of odorant components taking into account, their interaction is a difficult problem, while it is easily done by bear's sense of smell mechanism which finds its inspiration from the superior hunting behavior of bears and their ability to sense the odor of prey even from miles away. (transpireonline.blog)

The current series of research papers is to investigate the asymptotic dynamics in logistic type chemotaxis models in one space dimension with a free boundary or an unbounded boundary. (aimsciences.org)
We adopt three synergistic strategies: First, we analyze neural circuit population recordings to better understand the relation between neural dynamics and behavior, Second, we theoretically explore the types of dynamics that could be associated with particular network computations. (stanford.edu)
As a result we obtain a system of partial differential equations describing the cell dynamics being affected by three basic phenomena: diffusion, chemotaxis and a surrounding flux. (nottingham.edu.cn)

Collective chemotaxis, where single cells cannot climb a biochemical signaling gradient but clusters of cells can, has been observed in different biological contexts, including confluent tissues where there are no gaps or overlaps between cells. (nih.gov)
We first study the impact of advection on collective chemotaxis and delineate a regime where advective terms are important. (nih.gov)
In this talk I will present two studies of collective behavior observed in animal groups. (espci.fr)

Xu X, Gera N, Li H, Yun M, Zhang L, Wang Y, Wang QJ, Jin T. GPCR-mediated PLCβγ/PKCβ/PKD signaling pathway regulates the cofilin phosphatase slingshot 2 in neutrophil chemotaxis . (nih.gov)

During the past decade the cytokines have come to the fore as important multifunctional mediators of cell behavior and cell-cell communication. (nih.gov)
The heterogeneity in c-di-GMP concentrations, generated by differences in abundance and timing of polar appearance of PdeB, orchestrates the population behavior with respect to cell-surface interaction and environmental spreading. (nature.com)
A similar bimodal distribution of c-di-GMP was described in Pseudomonas aeruginosa 12 , where the PDE Pch is recruited to and activated at the flagellated cell pole via phosphorylation by the chemotaxis histidine kinase CheA. (nature.com)
2. In vitro behavior of hematopoietic progenitor cells under the influence of chemoattractants: stromal cell-derived factor-1, steel factor, and the bone marrow environment. (nih.gov)
14. Cell surface peptidase CD26/dipeptidylpeptidase IV regulates CXCL12/stromal cell-derived factor-1 alpha-mediated chemotaxis of human cord blood CD34+ progenitor cells. (nih.gov)

Her discoveries suggest an evolutionarily conserved mechanism by which eukaryotic cells gate sensitive concentration ranges of chemoattractant for chemotaxis. (nih.gov)

The significance of chemotaxis in biology and clinical pathology was widely accepted in the 1930s, and the most fundamental definitions underlying the phenomenon were drafted by this time. (wikipedia.org)
An interesting problem arising in many contexts of mathematical biology is the study of the relevance of chemotaxis in reaction-diffusion processes. (nottingham.edu.cn)

Background & aims: Recent studies have shown that some fungi exhibit cannibalistic behavior. (lu.se)

1. Circulation and chemotaxis of fetal hematopoietic stem cells. (nih.gov)

Your task is to explore the role of various fungal traits (chemotaxis, degradation potential) in cannibalism among soil fungi, which includes recording them doing this live under the microscope. (lu.se)

To demonstrate this, the effects of phorbol-12-myristat-13-acetat (PMA, 0.1-10 nM), N-formylmethionine-leucyl-phenylalanine (fMLP, 10 nM), and protein kinase C inhibitor 1-(5-isoquinolinesulfonyl)-2-methylpiperazine (H7) on PMN chemotaxis and suicidal NETosis were studied. (uni-regensburg.de)

In fact, the innate chemotaxis behavior in worms robustly violates key rationality paradigms of transitivity, independence of irrelevant alternatives and regularity. (iucc.ac.il)

Students cultivate samples of this organism in lab exercises to learn about topics such as chemotaxis, microevolution, organelle growth and regeneration , and effects of vaping . (nih.gov)

J. I. Diaz and T. Nagai , Symmetrization in a parabolic-elliptic system related to chemotaxis, Advances in Mathematical Science and Applications , 5 (1995), 659-680. (aimsciences.org)
J. I. Diaz , T. Nagai and J.-M. Rakotoson , Symmetrization techniques on unbounded domains: Application to a chemotaxis system on $\mathbb{R}^N$, J. Differential Equations , 145 (1998), 156-183. (aimsciences.org)
E. Galakhov , O. Salieva and J. I. Tello , On a parabolic-elliptic system with chemotaxis and logistic type growth, J. Differential Equations , 261 (2016), 4631-4647. (aimsciences.org)
D. Horstmann and M. Winkler , Boundedness vs. blow-up in a chemotaxis system, J. Differential Equations , 215 (2005), 52-107. (aimsciences.org)
K. Lin , C. Mu and Y. Gao , Boundedness and blow up in the higher-dimensional attraction-repulsion chemotaxis system with nonlinear diffusion, Journal of Differential Equations , 261 (2016), 4524-4572. (aimsciences.org)

Chemotaxis (from chemo- + taxis) is the movement of an organism or entity in response to a chemical stimulus. (wikipedia.org)

10] L. Corrias, B. Perthame, H. Zaag, Global solutions of some chemotaxis and angiogenesis systems in high space dimensions, Milan J. Math. (rikelab.jp)

Anatomy17

Organisms10

Diseases5

Chemicals and Drugs61

Analytical, Diagnostic and Therapeutic Techniques and Equipment20

Psychiatry and Psychology81

Phenomena and Processes39

Disciplines and Occupations1

Anthropology, Education, Sociology and Social Phenomena13

Technology, Industry, Agriculture2

Information Science8

Named Groups3

Health Care14

Geographicals1

Bacterial5

Motility5

Coli2

Negative chemotaxis1

Caenorhabditis1

Keller-segel4

Asymptotic behavior2

Nematodes3

Gradients4

Nonlinear Analysis2

Chemotactic2

Assays1

Innate behaviors1

Animal's behavior2

Dynamic behaviors2

Receptors3

Model organism3

Dynamical2

Cellular3

Sperm5

Thermotaxis1

Neuronal2

Cues1

Interactions3

Elegans2

Neuron2

20021

Mechanisms3

Pathogen1

Extracellular1

Nervous system2

Pathways2

Adaptation1

Lymphocytes1

Nematode1

Navigate1

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Dynamics3

Collective3

Neutrophil1

Cell5

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Worms1

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