نتایج جستجو برای: chemotaxis
تعداد نتایج: 11698 فیلتر نتایج به سال:
Chemotaxis is the ability to migrate towards the source of chemical gradients. It underlies the ability of neutrophils and other immune cells to hone in on their targets and defend against invading pathogens. Given the importance of neutrophil migration to health and disease, it is crucial to understand the basic mechanisms controlling chemotaxis so that strategies can be developed to modulate ...
Although the LFA-1, Mac-1 and alpha(4) integrins are required for chemotaxis, it is unknown how they are regulated or what specific role they play. Previously we demonstrated that fMLP and IL-8 induce chemotaxis via the p38 MAPK and phosphoinositide 3-kinase (PI3K) pathways, respectively. Here we show that these chemoattractants also activate and use Mac-1 and LFA-1 in a differential manner dur...
In recent years, the Content-Centric Networking (CCN) has attracted much attention from global Internet experts, especially it demonstrated outstanding effect on application in field of Things (IoT). At present, routing technique ICN is subjected to dynamic change network environment with development mobile Internet. Therefore, this paper proposes an Intelligent CCN strategy based Bacterial Quo...
Abstract We consider a model of congestion dynamics with chemotaxis: the density cells follows chemical signal it generates, while subject to an incompressibility constraint. The constraint results in formation patches , describing regions where maximal has been reached. these can be described by either Hele-Shaw or Richards equation type flow (depending on whether we diffusion pure advection)....
Chemotaxis is the directed motion of an organism toward environmental conditions it deems attractive and/or away from surroundings it finds repellent. Movement of flagellated bacteria such as Escherichia coli can be characterized as a sequence of smooth-swimming runs punctuated by intermittent tumbles. Tumbles last only a fraction of a second, which is sufficient to effectively randomize the di...
Chemotaxis is the ability of cells to move in the direction of an external gradient of signaling molecules. Cells are guided by actin-filled protrusions in the front, whereas myosin filaments retract the rear of the cell. Previous work demonstrated that chemotaxis of unpolarized amoeboid Dictyostelium discoideum cells is mediated by two parallel pathways, phosphoinositide-3-kinase (PI3K) and ph...
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