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huperzine a/crise épileptique
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[+]-Huperzine A treatment protects against N-methyl-D-aspartate-induced seizure/status epilepticus in rats.
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The toxicity of organophosphorous (OP) nerve agents is attributed to their irreversible inhibition of acetylcholinesterase (AChE), which leads to excessive accumulation of acetylcholine (ACh) and is followed by the release of excitatory amino acids (EAA). EAAs sustain seizure activity and induce
Huperzine A prophylaxis against pentylenetetrazole-induced seizures in rats is associated with increased cortical inhibition.
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Huperzine A (HupA) is a naturally occurring compound found in the firmoss Huperzia serrata. While HupA is a potent acetylcholinesterase inhibitor, its full pharmacologic profile is incompletely described. Since previous works suggested a capacity for HupA to prophylax against seizures, we tested the
Clinical use of an herbal-derived compound (Huperzine A) to treat putative complex partial seizures in a dog.
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A Bernese mountain dog was diagnosed with complex partial seizures that were supported by electroencephalographic findings. Clinical signs of the problem included "star gazing," fly snapping, licking, vacuous chewing, and ongoing anxiety. Treatment with Huperzine A, a compound isolated from Chinese
Huperzine A Provides Robust and Sustained Protection against Induced Seizures in Scn1a Mutant Mice.
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De novo loss-of-function mutations in the voltage-gated sodium channel (VGSC) SCN1A (encoding Nav1.1) are the main cause of Dravet syndrome (DS), a catastrophic early-life encephalopathy associated with prolonged and recurrent early-life febrile seizures (FSs), refractory afebrile epilepsy,
Sensitivity of butyrylcholinesterase knockout mice to (--)-huperzine A and donepezil suggests humans with butyrylcholinesterase deficiency may not tolerate these Alzheimer's disease drugs and indicates butyrylcholinesterase function in neurotransmission.
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Butyrylcholinesterase (EC 3.1.1.8 BChE) is present in all human and mouse tissues, and is more abundant than acetylcholinesterase (EC 3.1.1.7 AChE) in all tissues except brain. People who have no BChE activity due to a genetic variation are healthy. This has led to the hypothesis that BChE has no
Efficacy of huperzine in preventing soman-induced seizures, neuropathological changes and lethality.
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Huperzine A (HUP) is a potent reversible inhibitor of acetylcholinesterase (AChE) that crosses the blood-brain barrier. Its ability to prevent seizures and subsequent hippocampal neuropathological changes induced by the organophosphate soman was studied in guinea pigs. Results were compared to
[+]-Huperzine A protects against soman toxicity in guinea pigs.
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The chemical warfare nerve agent (CWNA) soman irreversibly inhibits acetylcholinesterase (AChE) causing seizure, neuropathology and neurobehavioral deficits. Pyridostigmine bromide (PB), the currently approved pretreatment for soman, is a reversible AChE inhibitor that does not cross the blood-brain
The combination of huperzine A and imidazenil is an effective strategy to prevent diisopropyl fluorophosphate toxicity in mice.
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Diisopropyl fluorophosphate (DFP) causes neurotoxicity related to an irreversible inhibition of acetylcholinesterase (AChE). Management of this intoxication includes: (i) pretreatment with reversible blockers of AChE, (ii) blockade of muscarinic receptors with atropine, and (iii) facilitation of
Structural analogs of huperzine A improve survival in guinea pigs exposed to soman.
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Chemical warfare nerve agents such as soman exert their toxic effects through an irreversible inhibition of acetylcholinesterase (AChE) and subsequently glutamatergic function, leading to uncontrolled seizures. The natural alkaloid (-)-huperzine A is a potent inhibitor of AChE and has been
Effects of Huperzine used as pre-treatment against soman-induced seizures.
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Huperzine A (HUP), an alkaloid isolated from the Chinese club moss, Huperzia serrata is a reversible inhibitor of cholinesterases which crosses the blood-brain barrier and shows high specificity for acetylcholinesterase (AChE) and a prolonged biological half-life. We tested, in vivo, its efficiency
Huperzine A: A promising anticonvulsant, disease modifying, and memory enhancing treatment option in Alzheimer's disease.
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Alzheimer's disease (AD) is the most frequent cause of dementia. Besides cognitive deterioration, patients with AD are prone to seizures - more than 20% of patients diagnosed with AD experience at least one unprovoked seizure and up to 7% have recurrent seizures. Although available antiepileptic
Donepezil increases resistance to induced seizures in a mouse model of Dravet syndrome.
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De novo loss-of-function mutations in SCN1A are the main cause of Dravet syndrome, a catastrophic encephalopathy characterized by recurrent early-life febrile seizures, a number of other afebrile seizure types that are often refractory to treatment, and behavioral abnormalities including social
Second generation cholinesterase inhibitors: effect of (L)-huperzine-A on cortical biogenic amines.
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L-Huperzine-A (Hup-A), a natural cholinesterase inhibitor (ChEI) derived from the Chinese herb Huperzia serrata, was administered systemically (i.p.) or locally through the microdialysis probe into the rat cortex. Systemic Hup-A significantly increased acetylcholine (ACh) levels above baseline at
A combination of [+] and [-]-Huperzine A improves protection against soman toxicity compared to [+]-Huperzine A in guinea pigs.
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The neuropathologic mechanisms after exposure to lethal doses of nerve agent are complex and involve multiple biochemical pathways. Effective treatment requires drugs that can simultaneously protect by reversible binding to the acetylcholinesterase (AChE) and blocking cascades of seizure related
Huperzine A ameliorates cognitive dysfunction and neuroinflammation in kainic acid-induced epileptic rats by antioxidant activity and NLRP3/caspase-1 pathway inhibition.
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Temporal lobe epilepsy (TLE) is one of the most prevalent types of epilepsy in human. Huperzine A (Hup-A) has been reported to possess antioxidative and anti-inflammatory properties; however, its role in TLE induced by kainic acid has not been determined. The current study investigated the
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