Application of intracellular microelectrophoresis to analysis of the influence of the low-level microwave radiation on electrokinetic properties of nuclei in human epithelial cells
Abstract:Intracellular microelectrophoresis was applied to investigate the electrokinetic properties of human buccal epithelium cell nuclei after exposure of cells to microwaves of wavelengths of 8 mm (f = 37.5 GHz) and 16 mm (f = 18.75 GHz) at a surface power density of 0.2 mW/cm(2). Irradiated or nonirradiated cells were suspended in a flat microelectrophoretic chamber and exposed to an electric field of 15 V/cm at a current flow of 0.1 mA. The cells, whose nuclei altered their intracellular location towards the anod… Show more
“…Evaluation of the electronegativity of the nuclei Assessment of the nuclei electronegativity (ENN, %) was performed using the method described in Shckorbatov et al (2002). Human buccal epithelial cells were placed in the microelectrophoresis unit between two coverslips.…”
C60 fullerenes are spherical molecules com posed purely of carbon atoms. They inspire a particularly strong scientific interest because of their specific physico chemical properties and potential medical and nanotech nological applications. In this work we are focusing on studying the influence of the pristine C60 fullerene on bio logical activity of some aromatic drug molecules in human buccal epithelial cells. Assessment of the heterochromatin structure in the cell nucleus as well as the barrier function of the cell membrane was performed. The methods of cell microelectrophoresis and atomic force microscopy were also applied. A concentration-dependent restoration of the functional activity of the cellular nucleus after exposure to DNA-binding drugs (doxorubicin, proflavine and ethidium bromide) has been observed in human buccal epithelial cells upon addition of C60 fullerene at a concentration of -1СГ5 M. The results were shown to follow the framework of interceptor/protector action theory, assuming that noncovalent complexation between C60 fullerene and the drugs (i.e., hetero-association) is the major process responsible for the observed biological effects. An independent con firmation of this hypothesis was obtained via investigation of the cellular response of buccal epithelium to the coad ministration of the aromatic drugs and caffeine, and it is based on the well-established role of hetero-association in drug-caffeine systems. The results indicate that C60 fuller ene may reverse the effects caused by the aromatic drugs, thereby pointing out the potential possibility of the use of aromatic drugs in combination with C60 fullerene for regu lation of their medico-biological action.
“…Evaluation of the electronegativity of the nuclei Assessment of the nuclei electronegativity (ENN, %) was performed using the method described in Shckorbatov et al (2002). Human buccal epithelial cells were placed in the microelectrophoresis unit between two coverslips.…”
C60 fullerenes are spherical molecules com posed purely of carbon atoms. They inspire a particularly strong scientific interest because of their specific physico chemical properties and potential medical and nanotech nological applications. In this work we are focusing on studying the influence of the pristine C60 fullerene on bio logical activity of some aromatic drug molecules in human buccal epithelial cells. Assessment of the heterochromatin structure in the cell nucleus as well as the barrier function of the cell membrane was performed. The methods of cell microelectrophoresis and atomic force microscopy were also applied. A concentration-dependent restoration of the functional activity of the cellular nucleus after exposure to DNA-binding drugs (doxorubicin, proflavine and ethidium bromide) has been observed in human buccal epithelial cells upon addition of C60 fullerene at a concentration of -1СГ5 M. The results were shown to follow the framework of interceptor/protector action theory, assuming that noncovalent complexation between C60 fullerene and the drugs (i.e., hetero-association) is the major process responsible for the observed biological effects. An independent con firmation of this hypothesis was obtained via investigation of the cellular response of buccal epithelium to the coad ministration of the aromatic drugs and caffeine, and it is based on the well-established role of hetero-association in drug-caffeine systems. The results indicate that C60 fuller ene may reverse the effects caused by the aromatic drugs, thereby pointing out the potential possibility of the use of aromatic drugs in combination with C60 fullerene for regu lation of their medico-biological action.
“…Есть основания предполагать, что общее состоя-ние организма и результаты воздействия на него ЭМ-поля можно тестировать на клетках буккаль-ного эпителия человека [5,6]. Изучению биоэлект-рических свойств клеточных ядер и их связи с функциональным состоянием клеток и организма в целом посвящены работы [7,8]. Установлена связь между физиологическим состоянием орга-низма человека и электрофоретической актив-ностью ядер клеток буккального эпителия.…”
unclassified
“…Установлена связь между физиологическим состоянием орга-низма человека и электрофоретической актив-ностью ядер клеток буккального эпителия. По динамике параметра «электроотрицательность ядра» (ЭОЯ %) [9] фиксируется связь между от-клонением ЭОЯ % от возрастной нормы (ВН) и патологиями различного генеза [7]. Методологи-чески экспериментальное исследование ЭМ-излу-чения и других физических факторов состоит из выбора и организации условий воздействия (час-тота, плотность потока мощности, поляризация и время экспозиции), а также регистрации измене-ния физиологического состояния биообъекта, вызванного этим воздействием.…”
unclassified
“…Результаты и обсуждение. Ранее было установлено, что на количество заряженных ядер клеток влияют различные внешние факторы, в том числе и электромагнитные поля различной частоты [6,7]. В исследованиях необходимо учи-тывать, что при действии на человека различ-ных физиотерапевтических процедур степень и направленность изменений ЭОЯ % зависят от его исходной величины.…”
unclassified
“…В исследованиях необходимо учи-тывать, что при действии на человека различ-ных физиотерапевтических процедур степень и направленность изменений ЭОЯ % зависят от его исходной величины. Также действие определен-ных доз электромагнитного излучения на клет-ки (in vitro) [6,7] и правильно подобранное лече-ние приводят значения ЭОЯ % к показателю ВН.…”
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