Results 101 to 110 of about 74,938 (266)

Move beyond free radical theory of aging

iMetaOmics, EarlyView.
Free radicals play a dual, dose‐dependent role in aging. Low levels activate the key sensor adenosine 5'‐monophosphate‐activated protein kinase (AMPK), promoting cell survival mechanisms like autophagy and enhancing mitochondrial health. High levels, however, push AMPK to initiate cell death pathways, such as apoptosis. This positions AMPK as a central
Xiaofeng Dai, Meilan Hu, Ruohan Lyu
wiley   +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

Non‐Histone Lactylation: A New Frontier in Cerebral Ischemia‐Reperfusion Injury

Med Research, EarlyView.
ABSTRACT Reperfusion therapy is the mainstay of treatment for ischemic stroke (IS) but frequently exacerbates secondary injury. Following cerebral ischemia and hypoxia, lactate accumulates markedly. Traditionally regarded as a metabolic byproduct, lactate has gained new significance with the discovery of protein lactylation. In addition to experimental
Minghui Tang, Yuying Mo, Zhishan Ling, Yuting Zeng, Qi Zhang, Shuqi Zheng, Shuyang Wen, Yupeng Xiao, Siying Long, Tingting Yang, Qianru Li, Wenjie Shi, Guozhi Huang, Qing Zeng   +13 more
wiley   +1 more source

ATP- and Adenosine-Mediated Signaling in the Central Nervous System: Adenosine Stimulates Glutamate Release From Astrocytes via A2a Adenosine Receptors

Journal of Pharmacological Sciences, 2004
Adenosine enhanced intracellular Ca2+ concentrations in astrocytes via A2a adenosine receptors involving protein kinase A (PKA) activation. The Ca2+ rise is inhibited by brefeldin A, an inhibitor of vesicular transport; but not by neomycin and U73122 ...
Tomoyuki Nishizaki
doaj   +1 more source

A network analysis to compare biomarker profiles in patients with and without diabetes mellitus in acute heart failure [PDF]

, 2017
Aims: It is unclear whether distinct pathophysiological processes are present among patients with acute heart failure (AHF), with and without diabetes.
Bloomfield, Daniel M., Cleland, John G.F., Cotter, Gad, Davison, Beth A., Demissei, Biniyam G., Dittrich, Howard, Ezekowitz, Justin A., Givertz, Michael M., Hillege, Hans L., Khan, Mohsin A.F., Metra, Marco, O'Connor, Christopher M., Ponikowski, Piotr, Sharma, Abhinav, Teerlink, John R., Tromp, Jasper, van Veldhuisen, Dirk J., Voors, Adriaan A.   +17 more
core   +2 more sources

Repeatability of Rapid Human Cardiac Phosphorus MRSI (31P‐MRSI) Using Concentric Ring Trajectory Readouts at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose PCr/ATP ratio is determined at 7 T typically using Fourier‐transform based magnetic resonance spectroscopic imaging sequences (FT‐MRSI). These sequences require acquisition times longer than desirable for inclusion in cardiac clinical trials. Concentric ring trajectory (CRT‐MRSI) has been described as an accelerated alternative k‐space
Ferenc E. Mózes, William T. Clarke, Andrew Tyler, Jabrane Karkouri, Fabian Niess, Jack J. J. J. Miller, Christopher T. Rodgers, Wolfgang Bogner, Ladislav Valkovič   +8 more
wiley   +1 more source

Adenosine A1 receptor (ADORA1) [PDF]

Science-Business eXchange, 2009
  +6 more sources

Adenosine A_2A receptor binding profile of two antagonists, ST1535 and KW6002: consideration on the presence of atypical adenosine A_2A binding sites

Frontiers in Psychiatry, 2010
Adenosine A2A receptors seem to exist in typical (more in striatum) and atypical (more in hippocampus and cortex) subtypes. In the present study, we investigated the affinity of two adenosine A2A receptor antagonists, ST1535 [2 butyl -9-methyl-8-(2H-1,2 ...
Teresa Riccioni, Fabiana Leonardi, Franco Borsini   +2 more
doaj   +1 more source

Quaternary structure of a G-protein-coupled receptor heterotetramer in complex with Gi and Gs [PDF]

, 2016
Background G-protein-coupled receptors (GPCRs), in the form of monomers or homodimers that bind heterotrimeric G proteins, are fundamental in the transfer of extracellular stimuli to intracellular signaling pathways.
Aguinaga Andrés, David, Brugarolas Campillos, Marc, Canela Campos, Enric I., Casadó, Vicent, Cordomí, Arnau, Cortés Tejedor, Antonio, Franco Fernández, Rafael, García-Saez, Ana J., Lluís i Biset, Carme, Mallol Montero, Josefa, McCormick, Peter J., Moreno Guillén, Estefanía, Navarro Brugal, Gemma, Pardo, Leonardo, Pérez-Benito, Laura, Zelman-Femiak, Monika   +15 more
core   +3 more sources

Cardenolide‐Engineered Extracellular Vesicles Augment Drug Uptake and Cytotoxicity in Non‐small Cell Lung Cancer Cells

Small Methods, EarlyView.
Cardenolide‐functionalized extracellular vesicles enable targeted delivery of the chemotherapeutic doxorubicin to A549 lung cancer cells by binding Na+/K+‐ATPase, which is overexpressed in these cells. Surface‐modified, drug‐loaded EVs exhibit enhanced cytotoxicity compared to unmodified EVs and free drug, suggesting this system may lower the effective
Maja Dorfner, Anika Mifka, Rodrigo Maia de Pádua, Izabella Thaís da Silva, Iara Zanella Guterres, Lorenzo Sana, Gregor Fuhrmann, Jennifer Munkert   +7 more
wiley   +1 more source