Results 11 to 20 of about 143,456 (314)

Caffeine and Adenosine [PDF]

open access: yesJournal of Alzheimer's Disease, 2010
Caffeine causes most of its biological effects via antagonizing all types of adenosine receptors (ARs): A1, A2A, A3, and A2B and, as does adenosine, exerts effects on neurons and glial cells of all brain areas. In consequence, caffeine, when acting as an AR antagonist, is doing the opposite of activation of adenosine receptors due to removal of ...
Ribeiro, Joaquim A., Sebastião, Ana M
openaire   +3 more sources

Caffeine as a Gelator [PDF]

open access: yesGels, 2016
Caffeine (a stimulant) and ethanol (a depressant) may have opposite effects in our body, but under in vitro conditions they can “gel” together. Caffeine, being one of the widely used stimulants, continued to surprise the scientific community with its unprecedented biological, medicinal and physicochemical properties.
Kolehmainen, Erkki, Nonappa, Nonappa
openaire   +7 more sources

Caffeine for the Pharmacological Treatment of Apnea of Prematurity in the NICU: Dose Selection Conundrum, Therapeutic Drug Monitoring and Genetic Factors

open access: yesFrontiers in Pharmacology, 2021
Caffeine citrate is the drug of choice for the pharmacological treatment of apnea of prematurity. Factors such as maturity and genetic variation contribute to the interindividual variability in the clinical response to caffeine therapy in preterm infants,
Jia-Yi Long   +9 more
doaj   +1 more source

Timing of Caffeine Therapy and Neonatal Outcomes in Preterm Infants: A Retrospective Study

open access: yesInternational Journal of Pediatrics, 2016
Background. Caffeine is widely used to treat apnea of prematurity. Here, we evaluated the efficacy of early caffeine (1-2 DOL) in decreasing the incidence of adverse neonatal outcomes. Methods.
Ivan Hand   +5 more
doaj   +1 more source

Caffeine activates HOG-signalling and inhibits pseudohyphal growth in Saccharomyces cerevisiae

open access: yesBMC Research Notes, 2023
Objective Caffeine has a wide range of effects in humans and other organisms. Caffeine activates p38 MAPK, the human homolog to the Hog1 protein that orchestrates the high-osmolarity glycerol (HOG) response to osmotic stress in the yeast Saccharomyces ...
Tarek Elhasi, Anders Blomberg
doaj   +1 more source

Impact of caffeine on myocardial perfusion reserve assessed by semiquantitative adenosine stress perfusion cardiovascular magnetic resonance

open access: yesJournal of Cardiovascular Magnetic Resonance, 2019
Background Adenosine is used in stress perfusion cardiac imaging to reveal myocardial ischemia by its vasodilator effects. Caffeine is a competitive antagonist of adenosine.
Andreas Seitz   +8 more
doaj   +1 more source

Effect Solvent and Extraction Method on the Characteristics of Green Bean Robusta Coffee [PDF]

open access: yesBIO Web of Conferences
One of the chemical elements found in coffee is caffeine, which is the second-largest secondary metabolite after chlorogenic acid. Robusta coffee has a higher caffeine content than Arabica.
Winarsih Sri   +3 more
doaj   +1 more source

Effects of chronic caffeine intake and withdrawal on neural activity assessed via resting-state functional magnetic resonance imaging in mice

open access: yesHeliyon, 2022
Caffeine is a psychoactive substance that not only improves wakefulness, but also slows the cognitive decline caused by aging. However, at present, there are no reports about the effects of caffeine withdrawal, including headaches and changes in brain ...
Mitsuki Rikitake   +11 more
doaj   +1 more source

Rapid measurement of serum caffeine concentrations in acuteclinical settings

open access: yesToxicology Communications, 2021
The number of acute caffeine poisoning cases have increased in Japan. We can use serum caffeine concentrations to evaluate the severity of caffeine poisoning and determine whether or not we should perform hemodialysis. In this study, we sought to develop
Tomoki Hanazawa   +3 more
doaj   +1 more source

Common questions and misconceptions about caffeine supplementation: what does the scientific evidence really show?

open access: yesJournal of the International Society of Sports Nutrition
Caffeine is a popular ergogenic aid that has a plethora of evidence highlighting its positive effects. A Google Scholar search using the keywords “caffeine” and “exercise” yields over 200,000 results, emphasizing the extensive research on this topic ...
Jose Antonio   +19 more
doaj   +1 more source

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