Establishment of immortalized Schwann cells derived from rat embryo dorsal root ganglia

Jiang,Huajun; Qu,Wei; Han,Feng; Liu,Dazhuang; Zhang,Weiguo

doi:10.3892/ijmm.2012.1016

Establishment of immortalized Schwann cells derived from rat embryo dorsal root ganglia

Authors:
- Huajun Jiang
- Wei Qu
- Feng Han
- Dazhuang Liu
- Weiguo Zhang
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Affiliations: Department of Orthopaedics, First Affiliated Hospital of Dalian Medical University, Dalian 116011, P.R. China
Published online on: June 6, 2012 https://doi.org/10.3892/ijmm.2012.1016
Pages: 480-486
Copyright: © Jiang et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].

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Abstract

Schwann cells (SCs) play an important role in the development, function and regeneration of peripheral nerves. They can enhance both peripheral and central nerve regeneration by providing a supportive environment for neurite outgrowth through the release of neurotrophic factors. However, use of primary SCs for in vitro models is limited because these cells are difficult to prepare and maintain in high yield and purity under common cell culture conditions. Human telomerase reverse transcriptase (hTERT) expression induces immortalization of various cell types without substantial alterations of their phenotypes. Therefore, in this study we transfected SCs with hTERT to establish a reliable cell source and observed the effect of hTERT on SCs. In order to accomplish this, SCs were isolated from rat embryo dorsal root ganglions, transfected with hTERT at early passage (passage 3). SCs passage 4, 8, 12 and 30 after transfection (hTERT-SCs) were used for immunocytochemistry, RT-PCR and western blotting. Results showed that all the early (passage 4) and late (passage 30) passage hTERT-SCs expressed hTERT mRNA and gained full telomerase activity. The transfection did not alter the mRNA expression of senescence-associated genes, such as p53 and p16. The expression of BDNF (brain-derived neurotrophic factor) was significantly decreased as cell passage increased, compared to the untransfected control. On the other hand, the expression of NGF (nerve growth factor ) was elevated at early passages (passages 4 and 8) and decreased at late passages (12 and 30). These data indicate that the use of specific immortalization techniques can establish SC lines that retain characteristics of typical primary SCs, and different mechanisms responsible for regulating NGF and BDNF expression. This is the first report regarding the immortalization of SCs derived from rat embryo dorsal root ganglions. These cells are useful in studies investigating the cellular mechanisms and regenerative processes of SCs.

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