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Assessment of hair follicle viability in artificial media before transplantation
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Currently, the number of men suffering from androgenetic alopecia is increasing every day and, according to various sources, has reached 80%. The aim of the study was to compare the condition of hair follicles (HF) that had not been exposed to the external media and those that had been exposed to various artificial media by assessing the function of the sodium-potassium pump in the cell membrane using electron microscopy. Material and methods. We studied HF that were extracted from the human body immediately before the study and kept for 6 hours in the three most common artificial solutions. All samples underwent electron microscopy of the follicles using the QUANTAX 70 software and spectral assessment of the chemical composition. Results. We found a correlation between the ionic composition of the HF and the composition of the solutions, which can affect cell viability. We found that standard saline solution, which is traditionally the agent of choice for short-term preservation of harvested grafts, had the greatest effect on the ratio of potassium and sodium ions inside the cell. However, a high concentration of sodium in the environment leads to an increase in its concentration inside the cell and to the «washout» of potassium ions. When comparing three solutions for preserving harvested follicles, the best results were obtained using the Dimephosphone solution, in which the «washout» of ions was insignificant, and the potassium-sodium ratio was practically preserved. Conclusions. According to the observed changes in the HF, it is possible to indirectly assess the processes occurring during storage and, accordingly, determine the degree of viability for further transplantation. A neutral solution purified from sodium ions is required to preserve the grafts.
Цель исследования: сравнить состояние волосяных фолликулов (ВФ), не подвергшихся влиянию внешней среды и после пребывания в различных искусственных средах, путем оценки функции натриево-калиевого насоса в мембране клеток методом электронной микроскопии. Материал и методы. Проведено исследование ВФ, которые непосредственно перед исследованием извлекли из организма человека и которые пробыли в течение 6 часов в трех самых распространенных искусственных растворах. Во всех образцах проводилась электронная микроскопия фолликулов с помощью программы QUANTAX 70 и спектральная оценка химического состава. Результаты. В ходе работы обнаружена корреляция между ионным составом ВФ и составом растворов, что может повлиять на жизнеспособность клеток. Выявлено, что наибольшее влияние на соотношение ионов калия и натрия внутри клетки оказал стандартный физиологический раствор, который традиционно является препаратом выбора для кратковременного сохранения забранных трансплантатов. Однако большая концентрация натрия в окружающей среде приводит к повышению его концентрации внутри клетки и к «вымыванию» из нее ионов калия. При сравнении трех растворов для сохранения забранных фолликулов наилучшие результаты были получены при использовании раствора Димефосфона, в котором «вымывание» ионов было незначительным и соотношение калия и натрия практически сохранялось. Заключение. По полученным изменениям ВФ можно косвенно судить и о процессах, происходящих во время хранения и, соответственно, проводить определение степени выживаемости для дальнейшей трансплантации. Для сохранения трансплантатов необходим раствор нейтрального состава, очищенный от ионов натрия.
Federation of Head and Neck Diseases Specialists
Title: Assessment of hair follicle viability in artificial media before transplantation
Description:
Currently, the number of men suffering from androgenetic alopecia is increasing every day and, according to various sources, has reached 80%.
The aim of the study was to compare the condition of hair follicles (HF) that had not been exposed to the external media and those that had been exposed to various artificial media by assessing the function of the sodium-potassium pump in the cell membrane using electron microscopy.
Material and methods.
We studied HF that were extracted from the human body immediately before the study and kept for 6 hours in the three most common artificial solutions.
All samples underwent electron microscopy of the follicles using the QUANTAX 70 software and spectral assessment of the chemical composition.
Results.
We found a correlation between the ionic composition of the HF and the composition of the solutions, which can affect cell viability.
We found that standard saline solution, which is traditionally the agent of choice for short-term preservation of harvested grafts, had the greatest effect on the ratio of potassium and sodium ions inside the cell.
However, a high concentration of sodium in the environment leads to an increase in its concentration inside the cell and to the «washout» of potassium ions.
When comparing three solutions for preserving harvested follicles, the best results were obtained using the Dimephosphone solution, in which the «washout» of ions was insignificant, and the potassium-sodium ratio was practically preserved.
Conclusions.
According to the observed changes in the HF, it is possible to indirectly assess the processes occurring during storage and, accordingly, determine the degree of viability for further transplantation.
A neutral solution purified from sodium ions is required to preserve the grafts.
Цель исследования: сравнить состояние волосяных фолликулов (ВФ), не подвергшихся влиянию внешней среды и после пребывания в различных искусственных средах, путем оценки функции натриево-калиевого насоса в мембране клеток методом электронной микроскопии.
Материал и методы.
Проведено исследование ВФ, которые непосредственно перед исследованием извлекли из организма человека и которые пробыли в течение 6 часов в трех самых распространенных искусственных растворах.
Во всех образцах проводилась электронная микроскопия фолликулов с помощью программы QUANTAX 70 и спектральная оценка химического состава.
Результаты.
В ходе работы обнаружена корреляция между ионным составом ВФ и составом растворов, что может повлиять на жизнеспособность клеток.
Выявлено, что наибольшее влияние на соотношение ионов калия и натрия внутри клетки оказал стандартный физиологический раствор, который традиционно является препаратом выбора для кратковременного сохранения забранных трансплантатов.
Однако большая концентрация натрия в окружающей среде приводит к повышению его концентрации внутри клетки и к «вымыванию» из нее ионов калия.
При сравнении трех растворов для сохранения забранных фолликулов наилучшие результаты были получены при использовании раствора Димефосфона, в котором «вымывание» ионов было незначительным и соотношение калия и натрия практически сохранялось.
Заключение.
По полученным изменениям ВФ можно косвенно судить и о процессах, происходящих во время хранения и, соответственно, проводить определение степени выживаемости для дальнейшей трансплантации.
Для сохранения трансплантатов необходим раствор нейтрального состава, очищенный от ионов натрия.
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