<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><bold>Background.</bold> The cell membrane acts as a barrier that hinders free entrance of most hydrophilic molecules into the cell. Due to numerous applications in medicine, biology and biotechnology, the introduction of impermeant molecules into biological cells has drawn considerable attention in the past years. One of the most famous methods in this field is electroporation, in which electric pulses with high intensity and short duration are applied to the cells. The aim of our study was to investigate the effect of time-varying magnetic field with different parameters on transmembrane molecular transport.<bold>Materials and methods.</bold> ‘Moreover, a comparison was made between the uptake results due to magnetic pulse exposure and electroporation mediated uptake.’ at the end of Background part. The Chinese hamster ovary (CHO) cells were exposed to magnetic pulses of 2.2 T peak strength and 250 μs duration delivered by Magstim stimulator and double 70 mm coil. Three different frequencies of 0.25, 1 and 10 Hz pulses with 112, 56 and 28 number of pulses were applied (altogether nine experimental groups) and Lucifer Yellow uptake was measured in each group. Moreover, maximum uptake of Lucifer Yellow obtained by magnetic pulses was compared to the measured uptake due to electroporation with typical parameters of 8 pulses of 100 μs, repetition frequency of 1 Hz and electric field intensities of 200 to 600 V/cm.<bold>Results and conclusions.</bold> Our results show that time-varying magnetic field exposure increases transmembrane molecular transport and this uptake is greater for lower frequencies and larger number of pulses. Besides, the comparison shows that electroporation is more effective than pulsed magnetic field, but the observed uptake enhancement due to magnetic exposure is still considerable.</abstract>

Background. The cell membrane acts as a barrier that hinders free entrance of most hydrophilic molecules into the cell. Due to numerous applications in medicine, biology and biotechnology, the introduction of impermeant molecules into biological cells has drawn considerable attention in the past years. One of the most famous methods in this field is electroporation, in which electric pulses with high intensity and short duration are applied to the cells. The aim of our study was to investigate the effect of time-varying magnetic field with different parameters on transmembrane molecular transport.Materials and methods. ‘Moreover, a comparison was made between the uptake results due to magnetic pulse exposure and electroporation mediated uptake.’ at the end of Background part. The Chinese hamster ovary (CHO) cells were exposed to magnetic pulses of 2.2 T peak strength and 250 μs duration delivered by Magstim stimulator and double 70 mm coil. Three different frequencies of 0.25, 1 and 10 Hz pulses with 112, 56 and 28 number of pulses were applied (altogether nine experimental groups) and Lucifer Yellow uptake was measured in each group. Moreover, maximum uptake of Lucifer Yellow obtained by magnetic pulses was compared to the measured uptake due to electroporation with typical parameters of 8 pulses of 100 μs, repetition frequency of 1 Hz and electric field intensities of 200 to 600 V/cm.Results and conclusions. Our results show that time-varying magnetic field exposure increases transmembrane molecular transport and this uptake is greater for lower frequencies and larger number of pulses. Besides, the comparison shows that electroporation is more effective than pulsed magnetic field, but the observed uptake enhancement due to magnetic exposure is still considerable.

Lucifer Yellow uptake by CHO cells exposed to magnetic and electric pulses

Department of Medical Physics, Tarbiat Modares University, Tehran, Iran

Department of Medical Genetics, Tarbiat Modares University, Tehran, Iran

Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia

Radiology and Oncology

{"article-title":"Lucifer Yellow uptake by CHO cells exposed to magnetic and electric pulses"}

Background. The cell membrane acts as a barrier that hinders free entrance of most hydrophilic molecules into the cell. Due to numerous applications in...

Lucifer Yellow uptake by CHO cells exposed to magnetic and electric pulses

Published Online: Feb 06, 2012

Page range: 119 - 125

DOI: https://doi.org/10.2478/v10019-012-0014-2

Keywords
electroporation, electro-endocytosis, time-varying magnetic field, transmembrane molecular transport

This content is open access.

Lucifer Yellow uptake by CHO cells exposed to magnetic and electric pulses

Published Online: Feb 06, 2012

Page range: 119 - 125

DOI: https://doi.org/10.2478/v10019-012-0014-2

Keywordselectroporation, electro-endocytosis, time-varying magnetic field, transmembrane molecular transport

This content is open access.

Keywords
electroporation, electro-endocytosis, time-varying magnetic field, transmembrane molecular transport