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Protein Diffusion in the Membrane

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Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...

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A Method for Determination and Simulation of Permeability and Diffusion in a 3D Tissue Model in a Membrane Insert System for Multi-well Plates

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Experimental and Theoretical Analysis of Metal Complex Diffusion through Cell Monolayer.

Katarzyna Gałczyńska¹, Jarosław Rachuna¹, Karol Ciepluch¹

¹Institute of Biology, Jan Kochanowski University, Uniwersytecka 7, 25-406 Kielce, Poland.

Entropy (Basel, Switzerland)

|April 3, 2021

Summary

This study developed a laser interferometry method using CHO-K1 cell monolayers to measure drug diffusion. Uncomplexed metal chlorides showed significantly higher cell permeability than metal-allylimidazole complexes.

Keywords:

1-allylimidazole complex cobalt(II)diffusion eukaryotic cell monolayer imidazole laser interferometry metal complex nickel(II)

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Area of Science:

Pharmacology and Toxicology
Biophysics
Cell Biology

Background:

Drug diffusion across biological membranes is critical for pharmaceutical development.
Epithelial cell barriers are key in drug permeability studies.
Accurate measurement of compound transport is essential for drug formulation.

Purpose of the Study:

To develop and validate a novel method for assessing drug diffusion through cell monolayers.
To quantify the permeability of metal complexes and their chlorides using laser interferometry.
To establish a basis for mathematical modeling of transport processes.

Main Methods:

Utilized Chinese Hamster Ovary (CHO-K1) cell monolayers to mimic epithelial barriers.
Employed laser interferometry for real-time, quantitative analysis of compound diffusion.
Investigated the transport of nickel(II) and cobalt(II) complexes with 1-allylimidazole and their respective chlorides.

Main Results:

Laser interferometry effectively quantified compound transport across cell monolayers.
Nickel(II) and cobalt(II) chlorides exhibited significantly higher permeability than their 1-allylimidazole complexes.
Specifically, nickel(II) chloride transport was 4.34-fold higher, and cobalt(II) chloride was 1.45-fold higher than their respective complexes after 60 minutes.

Conclusions:

Laser interferometry is a viable technique for quantitative analysis of drug transport across eukaryotic cell monolayers.
The complexation of metals with 1-allylimidazole significantly reduces their permeability.
The quantitative data obtained can inform mathematical models for drug transport and formulation.