Neural stem cell-conditioned medium ameliorates Aβ25–35-induced damage in SH-SY5Y cells by protecting mitochondrial function

  • Guoyong Jia Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
  • Zengyan Diao Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
  • Ying Liu Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
  • Congcong Sun Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
  • Cuilan Wang Department of Neurology, Qilu Hospital, Shandong University, Jinan, China
Keywords: Alzheimer’s disease, neural stem cell-conditioned medium, Aβ25–35, mitochondria, apoptosis

Abstract

Inhibition of amyloid β (Aβ)-induced mitochondrial damage is considered crucial for reducing the pathological damage in Alzheimer’s disease (AD). We evaluated the effect of neural stem cell-conditioned medium (NSC-CDM) on Aβ25–35-induced damage in SH-SY5Y cells. An in vitro model of AD was established by treating SH-SY5Y cells with 40 μM Aβ25–35 for 24 h. SH-SY5Y cells were divided into control, Aβ25–35 (40 μM), Aβ25–35 (40 μM) + NSC-CDM, and Aβ25–35 (40 μM) + neural stem cell-complete medium (NSC-CPM) groups. Cell viability was detected by CCK-8 assay. Apoptosis, reactive oxygen species (ROS) production, and mitochondrial membrane potential (MMP) were detected by flow cytometry. Malondialdehyde (MDA) content was detected by ELISA assay. Western blot analysis was used to detect cytochrome c release and apoptosis-related proteins. Transmission electron microscopy (TEM) was used to observe mitochondrial morphology. Cell viability significantly decreased and apoptosis significantly increased in SH-SY5Y cells treated with Aβ25–35, and both effects were rescued by NSC-CDM. In addition, NSC-CDM reduced ROS production and significantly inhibited the reduction of MMP caused by Aβ25–35. Furthermore, NSC-CDM ameliorated Aβ25–35-induced reduction in Bcl-2 expression levels and increased the expression levels of cytochrome c, caspase-9, caspase-3, and Bax. Moreover, Aβ25–35 induced the destruction of mitochondrial ultrastructure and this effect was reversed by NSC-CDM. Collectively, our findings demonstrated the protective effect of NCS-CDM against Aβ25–35-induced SH-SY5Y cell damage and clarified the mechanism of action of Aβ25–35 in terms of mitochondrial maintenance and mitochondria-associated apoptosis signaling pathways, thus providing a theoretical basis for the development of novel anti-AD treatments.

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Neural stem cell-conditioned medium ameliorates Aβ25–35-induced damage in SH-SY5Y cells by protecting mitochondrial function
Published
2020-02-24
How to Cite
1.
Jia G, Diao Z, Liu Y, Sun C, Wang C. Neural stem cell-conditioned medium ameliorates Aβ25–35-induced damage in SH-SY5Y cells by protecting mitochondrial function. Bosn J of Basic Med Sci [Internet]. 2020Feb.24 [cited 2020Mar.28];. Available from: https://www.bjbms.org/ojs/index.php/bjbms/article/view/4570
Section
Molecular Biology

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