Современные методы визуализации стволовых клеток in vivo (обзор)
Применение существующих и разработка новых методов визуализации in vivo определенных групп клеток для задач клеточной регенеративной медицины — перспективное направление современных биомедицинских исследований. Прижизненный биоимиджинг традиционно используется для изучения направления миграции, пролиферации и дифференцировки стволовых клеток в условиях эксперимента и клиники. В настоящее время разработаны методы для визуализации клеток и их структур in vivo с широким выбором показателей чувствительности, разрешения и специфичности, что позволяет подобрать оптимальные условия для проведения исследования. Разнообразие подходов дает возможность осуществлять анатомические, физиологические, фармакологические и молекулярные исследования, причем в некоторых случаях методы могут быть удачно скомбинированы. В настоящее время системы визуализации in vivo продолжают активно совершенствоваться: появляются еще более чувствительные приборы, создаются новые молекулярные метки и стратегии внедрения их в клетку.
В обзоре проведен сравнительный анализ основных существующих методов мониторинга и мечения стволовых клеток и их возможностей в решении экспериментальных и клинических задач, дана оценка их преимуществ и недостатков.
Рассмотрены основные группы методов визуализации, применяемые для прижизненного наблюдения за миграцией клеток: оптические (биолюминесцентные и флюоресцентные, оптическая когерентная томография), неоптические (магнитно-резонансные и радионуклидные), гибридные (фотоакустические) и методы мультимодального имиджинга.
Охарактеризованы особенности методов: чувствительность, разрешение, специфичность, глубина проникновения в ткани. Приведены примеры использования методов прижизненного имиджинга для изучения миграции стволовых клеток различного происхождения в разных моделях. Описаны основные группы контрастирующих агентов, применяемых для повышения контрастности, чувствительности и специфичности методов имиджинга.
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