Immunohistochemical analysis on the role of adenosine A1 receptors in epilepsy
T Ochiishi1, M Takita, M Ikemoto
1Biosignalling Department, National Institute of Bioscience and Human Technology, Tsukuba, Ibaraki, Japan.
Abstract:
Adenosine has an anticonvulsant effect in various models of epilepsy. This effect appears to be mediated through the activation of adenosine A1 receptors (A1Rs). We immunohistochemically investigated the changes of A1Rs expression in kainate-treated and hippocampus-kindled rats as chronic models of epilepsy. In the normal hippocampus, a predominant expression of A1Rs was detected in the CA2/CA3a field. The A1Rs immunoreactivity in this field began to decline drastically approximately 4 weeks after kainate treatment and remained minimal 8 weeks after treatment. In the hippocampus-kindled animals, A1Rs expression was minimal in the stimulated side but remained high in the nonstimulated side. The reduced expression of A1Rs in the CA2/CA3a field may be related to chronic epileptogenesis.
Related Concept Videos
Adrenergic Receptors: ɑ Subtype
Adrenaline ≥ Noradrenaline >> Isoprenaline
α-adrenoceptors are further divided into α1 and α2-adrenoceptors.
α1-Adrenoceptors: These receptors are located postsynaptically on the effector organs and cause constriction of smooth muscle mediated by activation of phospholipase C—inositol-1,4,5-trisphosphate...
Epilepsy and Seizures: Overview
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Antiepileptic Drugs: Glutamate Antagonists
Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
Adrenergic Receptors (Adrenoceptors): Classification
α-Adrenoceptors
α-Adrenoceptors are classified into two main subtypes: α1 and α2. The α1 adrenoceptors, which are found on postsynaptic...
Antiepileptic Drugs: GABAergic Pathway Potentiators
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for their...


