Verapamil
It works by relaxing blood vessels and reducing the workload on the heart, thereby improving blood flow and oxygen supply.
Verapamil has a wide range of clinical applications, including the management of hypertrophic cardiomyopathy, Raynaud's phenomenon, and migraine prophylaxis.
Researchers continually explore new uses and optimized protocols for verapamil, driving the need for efficient tools to locate and compare relevant research.
PubCompare.ai's AI-powered platform can help streamlime this process, enabling researchers to easily identify the best verapamil protocols from the literature, preprints, and patents.
Most cited protocols related to «Verapamil»
application, elution and sample preparation was pH 7.4, 0.067 M phosphate
buffer. All mobile phases were degassed for 30 min prior to use. Each
affinity microcolumn was used for approximately 200 sample injections
to provide optimum retention and peak resolution; however, these columns
were found to be stable for at least 300–400 injections and
over 6 months of use. The free fraction measurements were typically
made by injecting 1 μL of samples that contained 10 μM
of the desired drug or a mixture of 10 μM drug and 20 μM
soluble HSA, although other drug and protein concentrations were also
considered (see
These mixtures were incubated for at least 30 min prior to injection,
with both the sample and mobile phase being preheated to 37 °C
before passage through the affinity microcolumn. Other conditions
are provided in the
The dissociation rate constants and equilibrium constants
for each drug with soluble HSA were measured by using the general
scheme in Figure
of equilibrium constants, an injection flow rate was used that was
sufficiently high to minimize dissociation of drug–protein
complexes in the sample during their passage through the column. By
using lower flow rates, and longer residence times for the sample
in the column, the conditions were adjusted so that some of the drug–protein
complex could dissociate during passage through the column, thus increasing
the apparent free drug fraction and making it possible to determine
the dissociation rate constant for the drug with the soluble protein.
In both types of studies, the free drug fractions were measured by
dividing the drug’s baseline-corrected retained peak area by
the total peak area for the same drug in the absence of any soluble
protein. The baseline of each chromatogram was normalized using the
autofit and subtract baseline method of PeakFit 4.12 prior to data
analysis. No significant nonspecific binding with the control support
was seen for most drugs examined in this study.18 (link)−22 (link) Some nonspecific binding was seen for verapamil,
as reported previously;21 however, this
nonspecific binding did not have any notable effect on the free fractions
that were measured for this drug with soluble HSA.
Adalat® (Nifedipine) | 4.0 | 5 | 3 | 0 |
Amlodipine® (Amlodipine) | 3.5 | 22 | 2.97 | 0 |
Azupamil® (Verapamil) | 6 | 8 | 3.59 | 0 |
Carmen® (Lercanidipine) | 3 | 21 | 2.91 | 0 |
Escor® (Nilvadipine) | 6 | 5 | 4.72 | 0 |
Felodipine® (Felodipine) | 5 | 7 | 4.1 | 0 |
Nifedipine® (Nifedipine) | 6.2 | 15 | 5.21 | 0 |
Nitrendipine® (Nitrendipin) | 2.1 | 8 | 2.8 | 0 |
Norvasc® (Amlodipine) | 4.8 | 48 | 5 | 0 |
Verapamil® (Verapamil) | 6.9 | 49 | 5 | 0 |
Control group | 6.2 | 212 | 4.85 | 0 |
SD standard deviation.
Pre-study calculations revealed that 198 patients for each group were required to arrive at a statistical significance of p < 0.05 and a power of 80% for a difference in one unit in the Lequesne score. Matched pairs were established for potential interference variables such as gender, age, and body mass index. The first evaluations of equivalences were performed stepwise with 100, 200, 300, and 400 patients. Finally, a complete equivalence could not be achieved for gender (55% women in the active treatment group and 45% women in the control group) and body mass index (76.27 ± 9.1 kg in the control group).
The Lequesne score correlates significantly with pain and consists of three subscores which were calculated individually and together: pain and discomfort, maximum distance walked, and activities of daily living with a maximum score of 8 for each subscore and a total score of 24 (see Additional file
Most recents protocols related to «Verapamil»
EXAMPLE 3
The time-to-kill assay was conducted via colony forming unit (CFU) analysis at various concentrations of OCG to determine the minimal bactericidal concentration (MBC), which is defined as the lowest concentration to reduce bacterial viability by more than 99.9% with a concentration no more than 4×MIC. As shown in
Example 4
Supernatants from resting T84 colonic epithelial cells were collected and ultra-filtered to collect compounds smaller than 1 kDa, followed by enrichment for lipids by reversed-phase liquid chromatography. These lipid-enriched supernatants were capable of inhibiting primary human neutrophil migration stimulated by HXA3 in a cell-free in vitro assay (
Verapamil stocks (50 mM) and 2x-serial dilutions were made in water, 2 µl of the serial dilutions were added to 200 µl of ATP cocktail. ATP activity was monitored for 20 min to 2 h during which the slopes were constant. Statistical analyses were done as described (Swartz et al., 2013 (link); Swartz et al., 2014 (link)). EC50 values were calculated from fits according to f = Vb+((Vmax-Vb)*Xb/(Ksb + Xb)), where Vb is the basal activity (in the absence of verapamil), Vmax is the maximum activity, X is the concentration of verapamil, b is the Hill coefficient of the upward curve, Ks is the concentration for half-maximal stimulation or EC50. For each data fit, R2 was greater than 0.97 and each of the parameters was statistically significant (p < 0.05). Lines in the graphs represent fits to the data points (open and closed symbols) using the following equation f = Vb+((Vmax-Vb)*Xb/(Ksb + Xb))+(Vmax-(Vmax-V∞)*Xm/(Kim + Xm)), where Vb is the basal activity (in the absence of verapamil), Vmax is the maximum activity, X is the concentration of verapamil, b is the Hill coefficient of the upward curve, Ks is the concentration for half-maximal stimulation or EC50, V∞ is the activity at infinite verapamil concentrations, m is the Hill coefficient of the downward curve, and Ki is the concentration for half-maximal inhibition or IC50. All statistical analyses were performed with Sigmaplot 11.
E. coli polar lipids (polar extract) and synthetic lipids were acquired from Avanti (Alabaster, AL); these include 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine or 16:0-18:1 PC (POPC), 1-Palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylethanolamine (POPE), 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-L-serine (POPS), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylinositol (POPI), 1-Palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylglycerol (POPG), DPPA, 1,2-dipalmitoyl-sn-glycero-3-phosphate or 16:0 PA, 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC). Sphingomyelin (SM) was >99% pure from porcine brain with major acyl chains of 18:0 (50%) and 21:1 (21%), and cardiolipin (CL) was from >99% bovine heart with major acyl chains of 18:2 (90%). All synthetic lipids, SM and CL had very low tryptophan fluorescence (ex/em 295/350 nm) if purchased as powder. Cholesterol (Chol) and cholesteryl hemisuccinate (CHS) were purchased from Anatrace (Maumee, OH).
General chemicals were at the highest grade from Thermo Fisher Scientific (Waltham, Massachusetts).
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More about "Verapamil"
It is commonly used to treat various cardiovascular conditions, such as angina, hypertension, and certain heart rhythm disorders.
The mechanism of action involves relaxing blood vessels and reducing the workload on the heart, thereby improving blood flow and oxygen supply.
Verapamil has a wide range of clinical applications beyond just cardiovascular conditions.
It is also used in the management of hypertrophic cardiomyopathy, Raynaud's phenomenon, and migraine prophylaxis.
Researchers are continually exploring new uses and optimized protocols for verapamil, driving the need for efficient tools to locate and compare relevant research.
Other related terms and compounds include Hoechst 33342 (a fluorescent dye used for cell staining), DMSO (dimethyl sulfoxide, a common solvent), propidium iodide (a nucleic acid stain), FBS (fetal bovine serum, a common cell culture supplement), rhodamine 123 (a mitochondrial stain), and chemotherapeutic agents like doxorubicin, paclitaxel, cisplatin, and vincristine.
Understanding the interactions and applications of these related compounds can provide valuable insights into verapamil research and optimization.
PubCompare.ai's AI-powered platform can help streamline the process of identifying and comparing the best verapamil protocols from the literature, preprints, and patents.
This cutting-edge tool enables researchers to easily locate relevant information and leverage AI-driven comparisons to identify the most effective protocols and products for their verapamil-related studies.
By taking advantage of PubCompare.ai's capabilities, researchers can take their verapamil research to the next level and drive innovation in this important area of medicine.