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

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.