UNLABELLED BACKGROUND Alzheimer's disease (AD) is a neurologically degenerative disorder that affects more than 20 million people worldwide. The selective butyrylcholinesterase (BChE) inhibitors and bivalent cholinesterase (ChE) inhibitors represent new treatments for AD. FINDINGS A series of lycorine derivatives (1-10) were synthesized and evaluated for anti-cholinesterase activity. Resul...

This study was undertaken to examine the correlation, if any, between the inhibition of red blood cell cholinesterase (RBC ChE), plasma cholinesterase (PChE) and cerebrospinal fluid acetyl cholinesterase (CSF AChe) and the severity of symptoms in patients poisoned with organophosphorus (OP) compounds. Baseline values of the cholinesterases (RBC, Plasma & CSF) were established in our laboratory ...

Introduction: IAChE (acetylcholinesterase) is one of the plasma’s enzymes that plays a crucial role in nervous signal transduction in synapses and is responsible for the hydrolysis of Ach. Material & Method: We investigated three methods for the determination of AChE in human blood serum, using three different assays. Michel methods are based on the measurement of hydrogen ion produced in pro...

Background and objectives: Dracocephalum species are mentioned in Iranian traditional medicine for enhancement of cognitive performance. In the present study, the acetyl cholinesterase inhibitory and butyryl cholinesterase inhibitory activities as well as the anti-oxidant and anti-tyrosinase effects of three Iranian Dracocephalum species (D. kotschyi,...

Organophosphates (OP) are widely used as insecticides. Accidental OP poisoning is reported world over. These compounds inhibit the enzyme acetyl-cholinesterase within the peripheral and central nervous system by phosphorylation of its esteratic site. The resultant accumulation of acetylcholine at the cholinergic receptor sites, leads to signs of cholinergic toxicity. Accidental OP sites, leads ...

Introduct ion Alzheimer’s disease (AD) and Parkinson’s disease (PD) are the most frequent neurodegenerative disorders and cause of disability among western societies.1 Interest in the selective inhibition of monoamine oxidase B (MAO-B) has increased in the last years due to their therapeutic potential in this age related neurodegeneration. Currently, acetyl cholinesterase (AChE) inhibitors are ...

This paper presents preliminary results on the efficacy of acetyl-cholinesterase inhibitors (ChE-I) administered in a population of patients with mild-to-moderate Alzheimer's disease (AD), recruited in the context of an Italian Department of Health supported project (Progetto Cronos). The patients were followed up for a maximum of 21 months. Around 45% of the subjects responded well to the trea...

Several markers of chick neuroretinal differentiation were monitored in vivo and in culture. All increase markedly between 7 and 20 days of embryonic development in vivo. In vitro, endogenous GABA levels decrease almost immediately, while other neuronal markers increase as in vivo for 2 to 5 days before declining (choline acetyltransferase, acetyl cholinesterase, glutamic acid decarboxylase). N...