Related Experiment Video
Updated: Apr 18, 2026
12:18
Assembly of Cell Mimicking Supported and Suspended Lipid Bilayer Models for the Study of Molecular Interactions
Published on: August 3, 2021
4.2K
Fluphenazine: from an isolated molecule to its interaction with lipid bilayers
Joanna Petrus1, Bogusława Czarnik-Matusewicz1, Rafał Petrus1
1Department of Chemistry, University of Wrocław, F. Joliot Curie 14, Wrocław 50-383, Poland.
Chemistry and Physics of Lipids
|January 18, 2015
Summary
Fluphenazine (FPh) interacts with lipid membranes, impacting its biological effects. This study used FTIR-ATR spectroscopy to visualize FPh
Area of Science:
- Biophysics
- Spectroscopy
- Membrane Biophysics
Background:
- Fluphenazine (FPh), a phenothiazine derivative, possesses diverse biological activities including antimutagenic, proapoptotic, antiproliferative, and anti-multidrug resistance (MDR) properties.
- The interaction of FPh with lipid membranes is crucial for its biological functions, yet the underlying mechanisms remain largely unelucidated.
- Understanding these interactions is key to leveraging FPh's therapeutic potential.
Purpose of the Study:
- To investigate the molecular mechanisms of Fluphenazine (FPh) interaction with model lipid bilayers.
- To visualize the effects of FPh on the structural organization of lipid membranes.
- To elucidate how FPh influences lipid membrane properties at different concentrations and temperatures.
Main Methods:
- Fourier Transform Infrared Attenuated Total Reflectance (FTIR-ATR) spectroscopy was employed to study FPh-lipid interactions.
- A model lipid bilayer system composed of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) was utilized.
- Temperature-dependent FTIR spectra were analyzed, supported by principal component analysis (PCA) for data interpretation.
Main Results:
- FTIR-ATR spectroscopy successfully visualized the interaction between Fluphenazine (FPh) and DPPC lipid bilayers.
- Temperature-dependent spectral changes indicated alterations in DPPC's phase transition behavior upon FPh incorporation.
- Principal component analysis facilitated the interpretation of complex spectral data, revealing concentration-dependent effects of FPh on membrane structure.
Conclusions:
- Fluphenazine (FPh) directly interacts with and perturbs the structure of DPPC lipid bilayers.
- The observed changes in membrane properties suggest a mechanism by which FPh modulates its biological activities.
- This study provides crucial insights into the biophysical basis of Fluphenazine's membrane interactions, paving the way for further research.
More Related Videos
08:49Fluorescence-Based Measurements of Phosphatidylserine/Phosphatidylinositol 4-Phosphate Exchange Between Membranes
Published on: March 14, 2021
4.8K
10:52Gramicidin-based Fluorescence Assay; for Determining Small Molecules Potential for Modifying Lipid Bilayer Properties
Published on: October 13, 2010
13.5K
Related Concept Videos
01:23Factors Affecting Protein-Drug Binding: Drug Interactions
731
Drug interactions are a critical aspect of pharmacology and can occur when two or more drugs compete for the same binding site. This competition can result in one drug displacing another, altering the effect of the displaced drug. Drug interactions are complex processes that rely heavily on how much of the displacer drug is present and how strongly it can bind to the same sites as the displaced drug.
Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
Displacement interactions can have varying outcomes, ranging from toxicity to virtually...
731
01:26Pharmacokinetics: Drug–Food and Drug–Viral Interactions
641
A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of...
641
01:23Nonlinear Pharmacokinetics: Dependence of Elimination Half-Life and Dose Clearance
919
The elimination half-life and drug clearance of drugs following nonlinear kinetics can vary with dosage. The Michaelis-Menten parameters and drug concentration influence these factors. As the dose increases, the elimination half-life tends to lengthen, resulting in a reduction in clearance and a disproportionately larger area under the curve. The total clearance can be derived from the Michaelis-Menten equation for drugs following a one-compartment model.
A study on guinea pigs examined the...
A study on guinea pigs examined the...
919
01:25Pharmacokinetics: Drug–Drug Interactions
766
Drug interactions occur when the pharmacological effect of one drug is altered by another substance, either enhancing or diminishing its activity. The drug whose activity is altered is known as the object drug, and the substance causing the alteration is called the agent drug or the precipitant. The net effects of these interactions are mostly undesirable, leading to decreased effectiveness or increased adverse effects. In rare cases, interactions can be beneficial, such as the enhanced...
766
01:35Asymmetric Lipid Bilayer
11.2K
Biological membranes show uneven distribution of different types of lipids in the inner and outer layers, resulting in transverse asymmetric membranes. The treatment of the erythrocyte membrane with the enzyme phospholipase confirmed the asymmetric nature of the lipid bilayer. The enzyme hydrolyzes lipids into fatty acids and hydrophilic groups. The phospholipase acts only on the outer layer of the membrane, while the inner layer remains intact. The phospholipase treatment resulted in 80%...
11.2K
01:08Effect of Hepatic Disease on Pharmacokinetics: Dose Adjustments Due to Hepatic Impairment
367
Hepatic impairment, characterized by decreased liver function, does not uniformly mandate adjustments in drug dosage. Whether dosage modifications are necessary depends on various factors related to the drug's metabolism and elimination pathways. If a drug is primarily excreted via the kidneys and bypasses significant hepatic processing, if it undergoes minimal metabolic transformation in the liver, or if it is volatile and primarily expelled through the lungs, dose adjustments may not be...
367