In vitro solubilization of antibiotic drug sulfamethazine: An investigation on drug–micelle aggregate formation by spectroscopic and scattering techniques

2021 ◽  
Author(s):  
Mavani A ◽  
Aben Ovung ◽  
Soching Luikham ◽  
Debes Ray ◽  
Vinod K. Aswal ◽  
...  
Keyword(s):  
Aggregate Formation ◽  
Antibiotic Drug

A Simple and Rapid Method to Determine GPIIb/IIIa-Receptor Inhibitor Activity in Whole Blood

1999 ◽  
Vol 19 (03) ◽  
pp. 134-138
Author(s):  
Gitta Kühnel ◽  
A. C. Matzdorff
Keyword(s):  
Flow Cytometry ◽  
Platelet Count ◽  
Blood Sample ◽  
Platelet Activation ◽  
Whole Blood ◽  
Receptor Occupancy ◽  
Aggregate Formation ◽  
Inhibitor Activity ◽  
Receptor Inhibitor

SummaryWe studied the effect of GPIIb/IIIa-inhibitors on platelet activation with flow cytometry in vitro. Citrated whole blood was incubated with increasing concentrations of three different GPIIb/IIIa-inhibitors (c7E3, DMP728, XJ757), then thrombin or ADP were added and after 1 min the sample was fixed. Samples without c7E3 but with 0.1 U/ml thrombin had a decrease in platelet count. Samples with increasing concentrations of c7E3 had a lesser or no decrease in platelet count. The two other inhibitors (DMP 725, XJ757) gave similar results. GPIIb/IIIa-inhibitors prevent aggregate formation and more single platelets remain in the blood sample. The agonist-induced decrease in platelet count correlates closely with the concentration of the GPIIb/IIIa inhibitor and receptor occupancy. This correlation may be used as a simple measure for inhibitor activity in whole blood.

In Vitro Elucidation of the Folding Intermediates and Aggregate Formation of Hemoglobin Induced by Acetonitrile: A Multispectroscopic Approach

2016 ◽  
Vol 23 (10) ◽  
pp. 884-891 ◽  
Author(s):  
Mohammad Furkan ◽  
Asim Rizvi ◽  
Mohammad Afsar ◽  
Mohammad Rehan Ajmal ◽  
Rizwan H. Khan ◽  
...  
Keyword(s):  
Aggregate Formation ◽  
Folding Intermediates

In vitro inhibitory effect of sarpogrelate hydrochloride on serotonin-induced platelet small-aggregate formation

2000 ◽  
Vol 60 (2) ◽  
pp. 81-86 ◽  
Author(s):  
Akira Suehiro ◽  
Mikio Marumo ◽  
Hiroshi Yoshimoto ◽  
Satoshi Higasa ◽  
Eizo Kakishita
Keyword(s):  
Inhibitory Effect ◽  
Aggregate Formation ◽  
Small Aggregate ◽  
Sarpogrelate Hydrochloride

scholarly journals Synthesis, Characterization and in vitro Antimicrobial Evaluation of Chalconeimine Derivatives as Potential Inhibitors against Enzymes Produced from S. aureus: A Computational Approach

2019 ◽  
Vol 31 (10) ◽  
pp. 2157-2164
Author(s):  
B. Prithivirajan ◽  
M. Jebastin Sonia Jas ◽  
G. Marimuthu
Keyword(s):  
Antibacterial Agents ◽  
Dna Gyrase ◽  
Bacterial Strains ◽  
Bacterial Proteins ◽  
Antibiotic Drug ◽  
In Vitro Antibacterial Activity ◽  
Antimicrobial Evaluation ◽  
Potential Inhibitors ◽  
Gyrase Inhibitors

(Z)-1-(Benzo[d][1,3]dioxol-5-yl)-3-(4-(difluoromethoxy)-3-hydroxyphenyl)prop-2-en-1-one hydrazone derivatives pronounced in this manuscript represents a new collection of antibacterial agents in addition to the DNA gyrase inhibitors. Efforts had been made to synthesize those chalcone-hydrazone derivatives (4a-e) in good yields. The literature survey confirms that nano-ZnO as heterogeneous catalyst has obtained big interest because of its ecofriendly nature and has been explored as a effective catalyst for several organic ameliorations. Subsequently, induced by way of these observations and in continuation to our interest in organic synthesis with using nanocatalyst. in vitro Antibacterial activity has been evaluated towards Gram-positive and Gram-negative bacterial strains for all compounds. So one can discover the affinity to bacterial proteins docking have a look at have been carried out for 5 synthesized derivatives, antibiotic drug and co-crystallized ligands with special mechanism of action DNA gyrase B and methylthioadenosine/S-adenosylhomocysteine nucleosidase (MTAN) the usage of AutoDock 4.

In vitro studies on the interaction between human serum albumin and fosfomycin disodium salt, an antibiotic drug by multi-spectroscopic and molecular docking methods

2014 ◽  
Vol 41 (4) ◽  
pp. 2377-2387 ◽  
Author(s):  
Manjunath D. Meti ◽  
Kirthi S. Byadagi ◽  
Sharanappa T. Nandibewoor ◽  
Shrinivas D. Joshi ◽  
Uttam A. More ◽  
...  
Keyword(s):  
Molecular Docking ◽  
Human Serum Albumin ◽  
Serum Albumin ◽  
Human Serum ◽  
Disodium Salt ◽  
In Vitro Studies ◽  
Antibiotic Drug

scholarly journals Quantification of Fosfomycin in Combination with Nine Antibiotics in Human Plasma and Cation-Adjusted Mueller-Hinton II Broth via LCMS

Antibiotics ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 54
Author(s):  
Kelvin Kau-Kiat Goh ◽  
Wilson Ghim-Hon Toh ◽  
Daryl Kim-Hor Hee ◽  
Edwin Zhi-Wei Ting ◽  
Nathalie Grace Sy Chua ◽  
...  
Keyword(s):  
Combination Therapy ◽  
Human Plasma ◽  
Limit Of Detection ◽  
Synergistic Activity ◽  
Limit Of Quantification ◽  
Mueller Hinton ◽  
Antibiotic Drug ◽  
Dosing Regimens ◽  
Antibiotic Combination

Fosfomycin-based combination therapy has emerged as an attractive option in our armamentarium due to its synergistic activity against carbapenem-resistant Gram-negative bacteria (CRGNB). The ability to simultaneously measure fosfomycin and other antibiotic drug levels will support in vitro and clinical investigations to develop rational antibiotic combination dosing regimens against CRGNB infections. We developed an analytical assay to measure fosfomycin with nine important antibiotics in human plasma and cation-adjusted Mueller–Hinton II broth (CAMHB). We employed a liquid-chromatography tandem mass spectrometry method and validated the method based on accuracy, precision, matrix effect, limit-of-detection, limit-of-quantification, specificity, carryover, and short-term and long-term stability on U.S. Food & Drug Administration (FDA) guidelines. Assay feasibility was assessed in a pilot clinical study in four patients on antibiotic combination therapy. Simultaneous quantification of fosfomycin, levofloxacin, meropenem, doripenem, aztreonam, piperacillin/tazobactam, ceftolozane/tazobactam, ceftazidime/avibactam, cefepime, and tigecycline in plasma and CAMHB were achieved within 4.5 min. Precision, accuracy, specificity, and carryover were within FDA guidelines. Fosfomycin combined with any of the nine antibiotics were stable in plasma and CAMHB up to 4 weeks at −80 °C. The assay identified and quantified the respective antibiotics administered in the four subjects. Our assay can be a valuable tool for in vitro and clinical applications.

scholarly journals Rheological examination of erythrocyte aggregation in the presence of lipid-based fine particles

2005 ◽  
Vol 11 (2) ◽  
pp. 49-54
Author(s):  
Ivana Pajic-Lijakovic ◽  
Branko Bugarski ◽  
Milenko Plavsic
Keyword(s):  
Lipid Emulsion ◽  
Fine Particles ◽  
Drug Carriers ◽  
Erythrocyte Aggregation ◽  
Rheological Parameters ◽  
Aggregate Formation ◽  
Structural Ordering ◽  
Liposome Dispersion ◽  
Structural Parts

The development of lipid-based fine particles as potential drug carriers requires a detailed investigation of the possible effects of these carriers on the rheological properties of blood. In this study, we investigated the influence of dynamic conditions on aggregate formation and stability in dispersions of lipid-based fine particles in whole blood under in vitro conditions. The rheological parameters of two concentrations of liposome dispersion and two concentrations of lipid emulsion in blood were examined. A micro-rheological model of aggregating dispersions is proposed in which the apparent viscosity is estimated as the sum of the hydrodynamic and structural parts which are correlated with system structural ordering in the flow. The dynamics of structural ordering of the aggregating system an considered by examining the evolution of the state of the system in phase space depending on the shear rate. The addition of lipid-based particles induced aggregate formation in the blood, which was more pronounced at higher concentrations of lipid-based fine particles. Furthermore, larger and more stable aggregates are formed in liposome dispersions as compared to lipid emulsions in blood.

ANTIBACTERIAL ACTIVITY OF MEDICINAL PLANTS AGAINST MULTI DRUG RESISTANT URINARY TRACT INFECTION CAUSING ORGANISMS

2021 ◽  
Vol 1 (6) ◽  
pp. 85-95
Author(s):  
Perumal G
Keyword(s):  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Medicinal Plants ◽  
Tract Infection ◽  
Pathogenic Bacteria ◽  
Bacterial Pathogens ◽  
Drug Resistant ◽  
Antibiotic Drug ◽  
Phytochemical Studies

The present study was isolate Bacterial pathogens form Urinary Tract Infection and identified the Bacterial pathogens from UTI patients. Determination of the antibiotic drug resistant pattern of the isolated pathogenic bacteria using standard antibiotic discs Ampicilin (25μg), Erithromycin (15μg), Chloramphenicol (10μg) Gentamicin (10μg) and Tetracycline (30 μg).The study was carried out, in vitro screening of ethanolic extracts of some medicinal plants against the bacterial pathogens Escherichia coli, Proteus vulgaris, Staphylococcus aureus and Pseudomonas aeruginosawere isolate from the UTI. When compared with standard antibiotic disc selected plants extracts were showed maximum zone of inhibition against all the pathogens. This investigation strongly recommends that phytochemical studies are required to determine the types of compounds responsible for the antibacterial effect of these medicinal plants. Key words: Bacterial pathogens, Antibiotic drug resistant pattern and Medicinal plants

Neuronal Aggregate Formation Underlies Spatiotemporal Dynamics of Nonsynaptic Seizure Initiation

2003 ◽  
Vol 89 (4) ◽  
pp. 2330-2333 ◽  
Author(s):  
Marom Bikson ◽  
John E. Fox ◽  
John G. R. Jefferys
Keyword(s):  
Synaptic Transmission ◽  
Gap Junctions ◽  
High Frequency ◽  
Formation Rate ◽  
Simultaneous Recording ◽  
Aggregate Formation ◽  
Seizure Onset ◽  
Electrographic Seizures ◽  
High Frequency Activity

High-frequency activity often precedes seizure onset. We found that electrographic seizures, induced in vitro using the low-Ca2+ model, start with high-frequency (>150 Hz) activity that then decreases in frequency while increasing in amplitude. Multichannel and unit recordings showed that the mechanism of this transition was the progressive formation of larger neuronal aggregates. Thus the apparenthigh-frequency activity, at seizure onset, can reflect the simultaneous recording of several slower firing aggregates. Aggregate formation rate can be accelerated by reducing osmolarity. Because synaptic transmission is blocked when extracellular Ca2+ is reduced, nonsynaptic mechanisms (gap junctions, field effects) must be sufficient for aggregate formation and recruitment.

Sign in / Sign up

Export Citation Format

Share Document