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neurobiology AND neostigmine

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https://www.readbyqxmd.com/read/29174112/mechanism-of-rhinella-icterica-spix-1824-toad-poisoning-using-in-vitro-neurobiological-preparations
#1
Raquel Soares Oliveira, Allan Pinto Leal, Barbara Ogata, Carlos Gabriel Moreira de Almeida, Douglas Silva Dos Santos, Leandro Homrich Lorentz, Cleci Menezes Moreira, Karla de Castro Figueiredo Bordon, Eliane Candiani Arantes, Tiago Gomes Dos Santos, Cháriston André Dal Belo, Lúcia Vinadé
The biological activity of Rhinella icterica toxic secretion (RITS) was evaluated on chick neuromuscular junctions, rat heart́s tissue and mice hippocampal slices. At chick biventer cervicis preparation, RITS (5, 10 and 20μg/mL) produced a concentration-independent irreversible neuromuscular blockade, which was preceded by a transitory increase of muscle twitch tension with the lowest concentration, in 120minutes recordings. In this set of experiments, RITS incubation partially prevented the curare neuromuscular blockade...
November 23, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28294544/identification-of-acetylcholinesterase-inhibitors-using-homogenous-cell-based-assays-in-quantitative-high-throughput-screening-platforms
#2
Shuaizhang Li, Ruili Huang, Samuel Solomon, Yitong Liu, Bin Zhao, Michael F Santillo, Menghang Xia
Acetylcholinesterase (AChE) is an enzyme responsible for metabolism of acetylcholine, a neurotransmitter associated with muscle movement, cognition, and other neurobiological processes. Inhibition of AChE activity can serve as a therapeutic mechanism, but also cause adverse health effects and neurotoxicity. In order to efficiently identify AChE inhibitors from large compound libraries, homogenous cell-based assays in high-throughput screening platforms are needed. In this study, a fluorescent method using Amplex Red (10-acetyl-3,7-dihydroxyphenoxazine) and the Ellman absorbance method were both developed in a homogenous format using a human neuroblastoma cell line (SH-SY5Y)...
May 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/12489888/microinjection-of-neostigmine-into-the-pontine-reticular-formation-of-c57bl-6j-mouse-enhances-rapid-eye-movement-sleep-and-depresses-breathing
#3
Ralph Lydic, Christopher L Douglas, Helen A Baghdoyan
STUDY OBJECTIVES: The cholinergic model of rapid eye movement (REM) sleep has contributed significantly to understanding sleep neurobiology and sleep-dependent respiratory depression. The model has been used extensively in cat and rat, but no previous studies have demonstrated cholinergic REM sleep enhancement in mouse. The present study used microinjection of neostigmine into pontine reticular formation of mouse to test the hypothesis that enhancing pontine cholinergic neurotransmission would cause increased REM sleep and sleep disordered breathing...
December 2002: Sleep
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