Results 41 to 50 of about 201,939 (380)

Longitudinal Metabolomics Profiling of Parkinson's Disease-Related α-Synuclein A53T Transgenic Mice. [PDF]

open access: yesPLoS ONE, 2015
Metabolic homeostasis is critical for all biological processes in the brain. The metabolites are considered the best indicators of cell states and their rapid fluxes are extremely sensitive to cellular changes.
Xi Chen   +4 more
doaj   +1 more source

Persistence Increases in the Absence of the Alarmone Guanosine Tetraphosphate by Reducing Cell Growth

open access: yesScientific Reports, 2016
Most bacterial cells are stressed and as a result, some become tolerant to antibiotics by entering a dormant state known as persistence. The key intracellular metabolite that has been linked to this persister state is guanosine tetraphosphate (ppGpp ...
N. Chowdhury, Brian W. Kwan, T. Wood
semanticscholar   +1 more source

Loss of angiotensin II receptor expression in dopamine neurons in Parkinson’s disease correlates with pathological progression and is accompanied by increases in Nox4- and 8-OH guanosine-related nucleic acid oxidation and caspase-3 activation [PDF]

open access: yes, 2015
In rodent models of Parkinsons disease (PD), dopamine neuron loss is accompanied by increased expression of angiotensin II (AngII), its type 1 receptor (AT1), and NADPH oxidase (Nox) in the nigral dopamine neurons and microglia.
Aboud, O   +6 more
core   +2 more sources

Rho GTPases in Skeletal Muscle Development and Homeostasis

open access: yesCells, 2021
Rho guanosine triphosphate hydrolases (GTPases) are molecular switches that cycle between an inactive guanosine diphosphate (GDP)-bound and an active guanosine triphosphate (GTP)-bound state during signal transduction. As such, they regulate a wide range
Sonia Rodríguez-Fdez, Xosé R. Bustelo
doaj   +1 more source

Guanosine: a Neuromodulator with Therapeutic Potential in Brain Disorders

open access: yesAging and Disease, 2016
Guanosine is a purine nucleoside with important functions in cell metabolism and a protective role in response to degenerative diseases or injury. The past decade has seen major advances in identifying the modulatory role of extracellular action of ...
D. Lanznaster   +3 more
semanticscholar   +1 more source

Cyclic nucleotide specificity of the activator and catalytic sites of a cGMP-stimulated cGMP phosphodiesterase from Dictyostelium discoideum [PDF]

open access: yes, 1985
The cellular slime mold Dictyostelium discoideum has an intracellular phosphodiesterase which specifically hydrolyzes cGMP. The enzyme is activated by low cGMP concentrations, and is involved in the reduction of chemoattractant-mediated elevations of ...
Baraniak, Janina,   +8 more
core   +2 more sources

Purine Nucleosides Interfere with c-di-AMP Levels and Act as Adjuvants To Re-Sensitize MRSA To β-Lactam Antibiotics

open access: yesmBio, 2023
The purine-derived signaling molecules c-di-AMP and (p)ppGpp control mecA/PBP2a-mediated β-lactam resistance in methicillin-resistant Staphylococcus aureus (MRSA) raise the possibility that purine availability can control antibiotic susceptibility ...
Aaron C. Nolan   +7 more
doaj   +1 more source

Synthetic (p)ppGpp analogue is an inhibitor of stringent response in mycobacteria [PDF]

open access: yes, 2017
Bacteria elicit an adaptive response against hostile conditions such as starvation and other kinds of stresses. Their ability to survive such conditions depends, in part, on stringent response pathways.
Bhardwaj, Neerupma   +6 more
core   +2 more sources

Guanosine and its modified derivatives are endogenous ligands for TLR7.

open access: yesInternational Immunology, 2016
Toll-like receptor (TLR) 7and 8 were considered to recognize single-strand RNA (ssRNA) from viruses. Although these receptors also respond to synthetic small chemical ligands, such as CL075 and R848, it remains to be determined whether these receptors ...
Takuma Shibata   +12 more
semanticscholar   +1 more source

Dynamics of Microtubule Growth and Catastrophe [PDF]

open access: yes, 2007
We investigate a simple model of microtubule dynamics in which a microtubule evolves by: (i) attachment of guanosine triphosphate (GTP) to its end at rate lambda, (ii) GTP converting irreversibly to guanosine diphosphate (GDP) at rate 1, and (iii ...
Antal, T.   +4 more
core   +1 more source

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