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Mesenchymal stem cells rescue the Alzheimer’s disease cell model from cell death induced by misfolded truncated tau *

We have developed a stably transfected human cell model for Alzheimer’s disease with doxycycline-inducible expression of human misfolded truncated tau protein (AT tau). We have showed that AT tau reduced the metabolic activity of the AT tau cells, slowed down cell proliferation, and induced caspase-3–independent apoptosis-like programmed cell death, tauoptosis. The aim of this study was to test the possible capability of rat mesenchymal stem cells (MSCs) to interfere with AT tau protein-induced cell death. AT tau cells after treatment with 10 μM all-trans retinoic acid were either co-cultivated with MSCs or supplemented with MSC secretome for 6 and 9 days. We found that both MSCs and MSC secretome promoted survival and increased the metabolic activity of the cells. Moreover stem cells induced cell differentiation and formation of neurites with numerous varicosities. Strikingly, treatment had no effect on tau expression suggesting that MSC induced self-protecting mechanism that prevented AT tau cells from tauoptosis. Our results showed that mesenchymal stem cells and their secretome are able to rescue the Alzheimer’s disease cell model from cell death induced by misfolded truncated tau. We suggest that cell therapy may represent an alternative therapeutic avenue for treatment of human Alzheimer’s disease and related tauopathies.

URL: http://www.sciencedirect.com/science/article/pii/S0306452211008153

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As with any procedure, there could be pain or other substantial risks involved. These concerns should be discussed with your health care provider prior to any treatment so that you have proper informed consent and understand that there are no guarantees to healing.

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Published on 08-01-2014