Results 81 to 90 of about 14,150 (254)

The type IV pilus chemoreceptor PilJ controls chemotaxis of one bacterial species towards another.

PLoS Biology
Bacteria live in social communities, where the ability to sense and respond to interspecies and environmental signals is critical for survival. We previously showed the pathogen Pseudomonas aeruginosa detects secreted peptides from bacterial competitors ...
Kaitlin D Yarrington, Tyler N Shendruk, Dominique H Limoli   +2 more
doaj   +1 more source

Carotid Body Type-I Cells Under Chronic Sustained Hypoxia: Focus on Metabolism and Membrane Excitability

Frontiers in Physiology, 2018
Chronic sustained hypoxia (CSH) evokes ventilatory acclimatization characterized by a progressive hyperventilation due to a potentiation of the carotid body (CB) chemosensory response to hypoxia.
Raúl Pulgar-Sepúlveda, Rodrigo Varas, Rodrigo Varas, Rodrigo Iturriaga, Rodrigo Del Rio, Rodrigo Del Rio, Rodrigo Del Rio, Fernando C. Ortiz   +7 more
doaj   +1 more source

Signalling mechanisms of long term facilitation of breathing with intermittent hypoxia. [PDF]

, 2013
Intermittent hypoxia causes long-term facilitation (LTF) of respiratory motor nerve activity and ventilation, which manifests as a persistent increase over the normoxic baseline for an hour or more after the acute hypoxic ventilatory response.
Pamenter, Matthew E, Powell, Frank L
core   +1 more source

Solitary chemoreceptor cells in the nasal cavity serve as sentinels of respiration [PDF]

Proceedings of the National Academy of Sciences, 2003
Inhalation of irritating substances leads to activation of the trigeminal nerve, triggering protective reflexes that include apnea or sneezing. Receptors for trigeminal irritants are generally assumed to be located exclusively on free nerve endings within the nasal epithelium, requiring that trigeminal irritants diffuse through the junctional ...
Thomas E, Finger, Bärbel, Böttger, Anne, Hansen, Karl T, Anderson, Hessamedin, Alimohammadi, Wayne L, Silver   +5 more
openaire   +2 more sources

The hypoxic ventilatory response and arousal burden predict the magnitude of ventilatory long‐term facilitation in humans with obstructive sleep apnoea

Experimental Physiology, EarlyView.
Abstract The magnitude of progressive augmentation (PA) and ventilatory long‐term facilitation (vLTF) are two forms of respiratory plasticity that are enhanced in some humans with obstructive sleep apnoea (OSA). This response might be linked to repeated nocturnal exposure to intermittent hypoxia or other traits connected to OSA.
Jason H. Mateika, Danny Hammo, Dylan M. Kissane, Ali Azarbarzin   +3 more
wiley   +1 more source

Structural conservation of chemotaxis machinery across Archaea and Bacteria [PDF]

, 2015
Chemotaxis allows cells to sense and respond to their environment. In Bacteria, stimuli are detected by arrays of chemoreceptors that relay the signal to a two-component regulatory system.
Briegel, Ariane, Gunsalus, Robert P., Huang, Audrey N., Jensen, Grant J., Oikonomou, Catherine M., Ortega, Davi R.   +5 more
core   +3 more sources

Effects of osmotic changes on the chemoreceptor cell of rat carotid body

The Journal of Physiology, 2003
The carotid body plays a crucial role in cardiorespiratory regulation. In the present study we investigated the effect of osmotic changes on cytoplasmic calcium concentration ([Ca2+]c) and pH (pHi) of isolated chemoreceptor cells of the rat carotid body.
Zoltán Molnár, Gábor L. Petheö, Csaba Fülöp, András Spät   +3 more
openalex   +4 more sources

Cryo-Electron Tomography Reveals the Complex Ultrastructural Organization of Multicellular Filamentous Chloroflexota (Chloroflexi) Bacteria

Frontiers in Microbiology, 2020
The cell biology of Chloroflexota is poorly studied. We applied cryo-focused ion beam milling and cryo-electron tomography to study the ultrastructural organization of thermophilic Roseiflexus castenholzii and Chloroflexus aggregans, and mesophilic “Ca ...
Vasil A. Gaisin, Vasil A. Gaisin, Romain Kooger, Denis S. Grouzdev, Vladimir M. Gorlenko, Martin Pilhofer   +5 more
doaj   +1 more source

Electron cryotomography: a new view into microbial ultrastructure [PDF]

, 2009
Electron cryotomography (ECT) is an emerging technology that allows thin samples such as small bacterial cells to be imaged in 3D in a nearly native state to ‘molecular’ (not, vert, similar4 nm) resolution.
Jensen, Grant J., Li, Zhuo
core   +1 more source

Relationships Between Chemoreflex Responses, Sleep Quality, and Hematocrit in Andean Men and Women. [PDF]

, 2020
Andean highlanders are challenged by chronic hypoxia and many exhibit elevated hematocrit (Hct) and blunted ventilation compared to other high-altitude populations.
Anza-Ramirez, Cecilia, Corante, Noemi, DeYoung, Pamela N, Djokic, Matea A, Gaio, Eduardo, Gilbertson, Dillon, Heinrich, Erica C, Macarlupu, Jose L, Malhotra, Atul, Orr, Jeremy E, Powell, Frank L, Simonson, Tatum S, Villafuerte, Francisco C, Vizcardo-Galindo, Gustavo   +13 more
core   +1 more source