Where; E is the activity of the enzyme without extract and S is the activity of enzyme with the extract. IC50 value could be calculated from the % inhibition values of different concentrations of each plant extract.
Acetylthiocholine
It is commonly utilized in research studies to assess cholinergic function and to measure acetylcholinesterase activity.
Acetylthiocholine has been employed in a variety of experimental settings, including the evaluation of neurotransmitter systems, the investigation of neurological disorders, and the developement of potential therapeutic interventions.
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Most cited protocols related to «Acetylthiocholine»
Where; E is the activity of the enzyme without extract and S is the activity of enzyme with the extract. IC50 value could be calculated from the % inhibition values of different concentrations of each plant extract.
Sample solutions of EtOH and EtOAc extracts from S. luteus were made by dissolving 10 mg in 1 mL MeOH. Two more dilutions (10 × factor dilution) were included to obtain 1000, 100, and 10 μg/mL final concentrations. All the compounds were tested at a maximum concentration of 250 μM. Progression curves were calculated from absorbance, according to a standard curve of DTNB and L-GSH at different molar concentrations to measure the initial velocity, expressed as mM/min of product released. The corresponding IC50 value was calculated by curve fitting data (linear regression or non-linear regression analysis, PRISM 8.0.1, GraphPad, San Diego, CA, USA). As a protic non-selective solvent, MeOH was selected to dissolve samples and employed as a negative control at a maximum concentration of 10% in the final mix volume without affecting enzyme reaction. Donepezil-hydrochloride was used as a positive control with a calculated IC50 value of 12.40 ± 1.35 nM close to our previous report, as shown by Valarezo et al. [35 (link)].
where A is an initial velocity of the reaction with enzyme, a is an initial velocity of the reaction without enzyme, B is an initial velocity of the enzyme reaction with extract, and b is an initial velocity of the reaction with extract but without enzyme.
The BChE assay mixture contained 100 ng BChE in 50 mM KPB, pH 7.0; 1 mM MgCl2 (100 μL); 1 mM butyrylthiocholine in 50 mM KPB, pH 7.0 (40 μL); 16 mM DTNB in 50 mM KPB, pH 7.0 (10 μL); and extract (50 μL). Enzyme inhibitory activity was spectrophotometrically measured at a wavelength of 412 nm using the 96-well microplate reader. Inhibitory activities of pepper extracts were calculated as percentage of inhibition as above.
Since inhibitory activities of AChE and BChE were determined utilizing enzyme kinetics, interferences from sample colors can be unconcerned. Inhibitory activities were determined using the rate of yellow color development during the enzyme assay (which becomes more yellow with time). Therefore, even though the samples had strong colors (yellow, green, red, and orange), the yellow color will only develop in the assay with enzyme. Thus, the yellow color measured in the assay only results from the reaction between the substrate and the enzyme. Eserine, a reversible anti-cholinesterase drug, was used as a control inhibitor for both AChE and BChE assays.
Most recents protocols related to «Acetylthiocholine»
Example 10
For initiating an enzymatic reaction, acetylthiocholine (final concentration of 1.8 mg mL-1) was added into human blood sample, which had been diluted 10 times with phosphate buffered saline (PBS). For experiment producing the data for
Inhibition (%) = 100 - Change of sample absorbance/Change of blank absorbance X 100
The Bradford method was used to quantify proteins [30 (link)]. The reactions were performed spectrophotometrically in quadruplicate, with the protocol adapted for microplates [31 (link)].
AChE activity was carried out using acetylthiocholine (ASCh) and propionylthiocoline (PSCh) as substrates. We followed the protocol described by Ellman and coworkers [32 (link)], with modifications (absorbance at 414 nm, every 40 s, for 5 min). AChE was expressed as nanomol of substrate hydrolyzed per minute and per mg of protein (U) after 10 min of absorbance reaction for measurement of enzymatic activity. Lactate Dehydrogenase (LDH) activity was performed using pyruvate as substrate and measuring the reduction of pyruvate and the oxidation of NADH at 340 nm, every 40 s, for 5 min. The determinations of the LDH activity followed the protocol described by Vassault [33 ]. The variations in Glutathione-S-Transferase (GST) activity were carried out according to the method of Habig and coworkers [34 (link)].
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More about "Acetylthiocholine"
It serves as a substrate for the enzyme acetylcholinesterase, which catalyzes the hydrolysis of the neurotransmitter acetylcholine.
Acetylthiocholine has been employed in a variety of experimental settings, including the evaluation of neurotransmitter systems, the investigation of neurological disorders, and the development of potential therapeutic interventions.
Researchers can leverage the power of PubCompare.ai's AI-driven platform to optimize their Acetylthiocholine research protocols, effortlessly locating the best protocols from literature, pre-prints, and patents using intelligent comparisons.
The platform can also guide researchers to the most effective approaches and products for their Acetylthiocholine studies, allowing them to experience the future of research.
In addition to Acetylthiocholine, other related compounds and techniques are commonly used in this area of research. 5,5′-dithiobis(2-nitrobenzoic acid) (DTNB), also known as Ellman's reagent, is frequently used to measure acetylcholinesterase activity.
Acetylcholinesterase is the enzyme responsible for the hydrolysis of acetylcholine, and it plays a crucial role in the regulation of cholinergic neurotransmission.
Acetylthiocholine chloride is another commonly used substrate for acetylcholinesterase assays.
Donepezil, a medication used to treat Alzheimer's disease, is known to inhibit acetylcholinesterase, thereby increasing the availability of acetylcholine in the brain.
DMSO (dimethyl sulfoxide) is often used as a solvent for various compounds in research studies, including those involving Acetylthiocholine.
Bovine serum albumin (BSA) is a common protein used in assays to stabilize enzymes and proteins, while DPPH (2,2-diphenyl-1-picrylhydrazyl) is a free radical scavenging compound used to evaluate antioxidant activity.
By understanding the broader context and related terms, researchers can more effectively design and conduct their Acetylthiocholine studies, leveraging the insights and tools provided by platforms like PubCompare.ai to optimize their research protocols and drive scientific discoveries.