Аннотация
Известно, что регуляция митохондриальных функций влияет на дифференцировку и созревание нейронов. Изучение этих процессов имеет как фундаментальное, так и практическое значение для регенеративной нейробиологии. Цель исследования: охарактеризовать изменения деления митохондрий и их связь с активацией окислительного фосфорилирования (метаболического переключения) при созревании ИПСК-продуцированных нейрональных предшественников, при введении в стриатум крыс. Крысам Вистар (n=15) в хвостатое ядро односторонне вводили нейрональные предшественники, полученные из ИПСК человека. С помощью иммуноокрашивания оценивали изменения локализации и экспрессии маркеров дифференцировки нейронов: нестина, NeuN, нейрональной енолазы, а также белка наружной мембраны митохондрий, АТФ-синтазы и белка деления митохондрий Drp1. Измерения проводились на клетках трансплантата через 2 недели, 3 и 6 месяцев после операции. Созревание трансплантата было связано с колебаниями морфометрических параметров митохондриальной фракции и уровня Drp1. Усиление деления митохондрий выявляли через 3 месяца после трансплантации, что предшествовало увеличению содержания АТФ-синтазы к 6 месяцу и переключению трансплантированных клеток на окислительное фосфорилирование. Проведенный эксперимент показал связь митохондриальной динамики с изменениями метаболического профиля и созреванием трансплантированных нейронов. Регуляция митохондриальной динамики может иметь значение для разработки методов улучшения интеграции трансплантированных нейронов в структуры мозга.
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