Differential roles of environmental enrichment in Alzheimer's type of neurodegeneration and physiological aging

Описание

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.3389/fnagi.2017.00245

Ключевые слова: aging, Alzheimer's disease, environmental enrichment, neurogenesis, Neurosphere, Time-lag model

Аннотация: Impairment of hippocampal adult neurogenesis in aging or degenerating brain is a well-known phenomenon caused by the shortage of brain stem cell pool, alterations in the local microenvironment within the neurogenic niches, or deregulation of stem cell development. Environmental enrichment (EE) has been proposed as a potent tool to Показать полностьюrestore brain functions, to prevent aging-associated neurodegeneration, and to cure neuronal deficits seen in neurodevelopmental and neurodegenerative disorders. Here, we report our data on the effects of environmental enrichment on hippocampal neurogenesis in vivo and neurosphere-forming capacity of hippocampal stem/progenitor cells in vitro. Two models - Alzheimer's type of neurodegeneration and physiological brain aging - were chosen for the comparative analysis of EE effects. We found that environmental enrichment greatly affects the expression of markers specific for stem cells, progenitor cells and differentiated neurons (Pax6, Ngn2, NeuroD1, NeuN) in the hippocampus of young adult rats or rats with Alzheimer's disease (AD) model but less efficiently in aged animals. Application of time-lag mathematical model for the analysis of impedance traces obtained in real-time monitoring of cell proliferation in vitro revealed that EE could restore neurosphere-forming capacity of hippocampal stem/progenitor cells more efficiently in young adult animals (fourfold greater in the control group comparing to the AD model group) but not in the aged rats (no positive effect of environmental enrichment at all). In accordance with the results obtained in vivo, EE was almost ineffective in the recovery of hippocampal neurogenic reserve in vitro in aged, but not in amyloid-treated or young adult, rats. Therefore, EE-based neuroprotective strategies effective in Aβ-affected brain could not be directly extrapolated to aged brain.

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Издание

Журнал: Frontiers in Aging Neuroscience

Выпуск журнала: Т.9, №JUL

Номера страниц: 245

ISSN журнала: 16634365

Авторы

  • Salmin V.V. (Department of Medical and Biological Physics,Krasnoyarsk State Medical University)
  • Shapovalov K.A. (Department of Medical and Biological Physics,Krasnoyarsk State Medical University)
  • Komleva Y.K. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Kuvacheva N.V. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Khilazheva E.D. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Lopatina O.L. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Pozhilenkova E.A. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Salmina A.B. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Uspenskaya Y.A. (Research Institute of Molecular Medicine and Pathobiochemistry,Krasnoyarsk State Medical University named)
  • Morgun A.V. (Department of Pediatrics,Krasnoyarsk State Medical University named)

Вхождение в базы данных

  • РИНЦ (eLIBRARY.RU) (цитирований 6)
  • Ядро РИНЦ (eLIBRARY.RU)
  • Web of Science Core Collection
  • Scopus