n(6)-cyclohexyladenosine and Hypoxia-Ischemia--Brain

n(6)-cyclohexyladenosine has been researched along with Hypoxia-Ischemia--Brain* in 2 studies

Other Studies

2 other study(ies) available for n(6)-cyclohexyladenosine and Hypoxia-Ischemia--Brain

Article	Year
Adenosine-mediated activation of Akt/protein kinase B in the rat hippocampus in vitro and in vivo. Neuroscience letters, 2002, Aug-09, Volume: 328, Issue:2 Adenosine is considered an endogenous neuroprotective metabolite that through activation of the A(1) receptor results in reduction of neuronal damage following cerebral ischemia. Protein kinase B, also known as Akt/PKB, is part of an endogenous pathway that exerts effective neuroprotection from both necrotic and apoptotic cell death. Using a rat model of unilateral common carotid artery occlusion coupled with hypoxia, and using in vitro rat hippocampal slices, we examined the ability of adenosine to directly activate Akt/PKB. Western blot analysis revealed that levels of phosphorylated Akt/PKB were elevated in vivo under ischemic conditions in an adenosine A(1)-dependent manner and elevated in hippocampal slices treated with an adenosine A(1) agonist. We conclude from these studies that the activation of an adenosine A(1) receptor-mediated signal transduction pathway, either by endogenous adenosine (in vivo) or by an adenosine A(1) agonist (in vitro), results in the activation of the neurotrophic kinase Akt/PKB. Topics: Adenosine; Animals; Cell Death; Cerebrovascular Circulation; Hippocampus; Hypoxia-Ischemia, Brain; Immunohistochemistry; Male; Nerve Degeneration; Neurons; Organ Culture Techniques; Phosphorylation; Protein Serine-Threonine Kinases; Proto-Oncogene Proteins; Proto-Oncogene Proteins c-akt; Purinergic P1 Receptor Agonists; Purinergic P1 Receptor Antagonists; Rats; Rats, Sprague-Dawley; Receptors, Purinergic P1; Subcellular Fractions; Synaptic Transmission; Theophylline; Up-Regulation	2002
Lack of central effects of peripherally administered adenosine A(1) agonists on synaptic transmission in the rat hippocampus. Brain research, 2002, Sep-27, Volume: 951, Issue:1 Peripheral administration of adenosine A(1) receptor selective agonists is generally thought to protect the hippocampus against ischemic damage via central actions. We examined the effects of two peripherally administered A(1) agonists, cyclohexyladenosine (CHA) and adenosine amine congener (ADAC), on synaptic transmission in the hippocampus and on indices of cardiovascular function. We conclude that the permeability of these agonists is not sufficient to result in concentrations necessary to activate central adenosine A(1) receptors within the hippocampus. Topics: Adenosine; Animals; Cardiovascular Physiological Phenomena; Excitatory Postsynaptic Potentials; Hippocampus; Hypoxia-Ischemia, Brain; Male; Neurons; Neuroprotective Agents; Purinergic P1 Receptor Agonists; Rats; Rats, Sprague-Dawley; Receptors, Purinergic P1; Synapses; Synaptic Transmission; Theophylline	2002

Article

Year

Adenosine-mediated activation of Akt/protein kinase B in the rat hippocampus in vitro and in vivo.

Neuroscience letters, 2002, Aug-09, Volume: 328, Issue:2

Adenosine is considered an endogenous neuroprotective metabolite that through activation of the A(1) receptor results in reduction of neuronal damage following cerebral ischemia. Protein kinase B, also known as Akt/PKB, is part of an endogenous pathway that exerts effective neuroprotection from both necrotic and apoptotic cell death. Using a rat model of unilateral common carotid artery occlusion coupled with hypoxia, and using in vitro rat hippocampal slices, we examined the ability of adenosine to directly activate Akt/PKB. Western blot analysis revealed that levels of phosphorylated Akt/PKB were elevated in vivo under ischemic conditions in an adenosine A(1)-dependent manner and elevated in hippocampal slices treated with an adenosine A(1) agonist. We conclude from these studies that the activation of an adenosine A(1) receptor-mediated signal transduction pathway, either by endogenous adenosine (in vivo) or by an adenosine A(1) agonist (in vitro), results in the activation of the neurotrophic kinase Akt/PKB.

Topics: Adenosine; Animals; Cell Death; Cerebrovascular Circulation; Hippocampus; Hypoxia-Ischemia, Brain; Immunohistochemistry; Male; Nerve Degeneration; Neurons; Organ Culture Techniques; Phosphorylation; Protein Serine-Threonine Kinases; Proto-Oncogene Proteins; Proto-Oncogene Proteins c-akt; Purinergic P1 Receptor Agonists; Purinergic P1 Receptor Antagonists; Rats; Rats, Sprague-Dawley; Receptors, Purinergic P1; Subcellular Fractions; Synaptic Transmission; Theophylline; Up-Regulation

2002

Lack of central effects of peripherally administered adenosine A(1) agonists on synaptic transmission in the rat hippocampus.

Brain research, 2002, Sep-27, Volume: 951, Issue:1

Peripheral administration of adenosine A(1) receptor selective agonists is generally thought to protect the hippocampus against ischemic damage via central actions. We examined the effects of two peripherally administered A(1) agonists, cyclohexyladenosine (CHA) and adenosine amine congener (ADAC), on synaptic transmission in the hippocampus and on indices of cardiovascular function. We conclude that the permeability of these agonists is not sufficient to result in concentrations necessary to activate central adenosine A(1) receptors within the hippocampus.

Topics: Adenosine; Animals; Cardiovascular Physiological Phenomena; Excitatory Postsynaptic Potentials; Hippocampus; Hypoxia-Ischemia, Brain; Male; Neurons; Neuroprotective Agents; Purinergic P1 Receptor Agonists; Rats; Rats, Sprague-Dawley; Receptors, Purinergic P1; Synapses; Synaptic Transmission; Theophylline

2002