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Knockdown of long non-coding RNA PCAT1 in glioma stem cells promotes radiation sensitivity

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Abstract

This study aimed to investigate the function of glioma stem cells (GSCs) and the role of PCAT1. This study dissociated the differences between GSCs and glioma cells in terms of apoptosis rate and γH2AX positive cells levels after radiation. Microarray was carried out to detect that expressed PCAT1, and it was testified by RT-qPCR. After transfection, GSCs were used to investigate the influence of PCAT1 on radiation sensitivity. Sphere-formation capability was first examined. Cell apoptosis rate after radiation of 0 Gy or 6 Gy was analyzed by flow cytometry, and the level of γH2AX positive cells after 6 Gy radiation were compared. CCK8 assay was used to investigate the cell proliferation and RT-qPCR was used to examine miR-129-5p and HMGB1 expression. GSCs exhibited great capability in sphere formation and lower expression in apoptosis and γH2AX positive cells rates after 6 Gy radiation. PCAT1 had higher expression in GSCs. PCAT1 knockdown restrained the sphere-formation ability, increased the apoptosis rate and DNA damage under the treatment of radiation. Moreover, knockdown of PCAT1 inhibited the cell proliferation. In addition, silencing PCAT1 could increase the expression of miR-129-5p and decrease the expression of HMGB1. PCAT1 was overexpressed in GSCs and played a facilitating role in radiation resistance.

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Funding

This study was supported by Heilongjiang Province Health and Family Planning Commission Research Project (no. 2016-129); Harbin Science and Technology Talent Innovation Fund Project (no. 2016RAQXJ173).

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Author notes

  1. Penghai Zhang and Yang Liu are co-first authors.

Authors and Affiliations

  1. Department of Neurosurgery, Heilongjiang Provincial Hospital, No. 82 Zhongshan Road, Xiangfang District, Harbin, 150030, Heilongjiang, China

    Penghai Zhang, Yang Liu & Wenting Zou

  2. Department of Neurosurgery, The Fourth Affiliated Hospital, Harbin Medical University, No. 37 Yiyuan Street, Nangang District, Harbin, 150001, Heilongjiang, China

    Changyu Fu, Ce Wang, Xingbang Duan & Tianshu Zhao

Authors
  1. Penghai Zhang
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  2. Yang Liu
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  3. Changyu Fu
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  4. Ce Wang
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  6. Wenting Zou
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  7. Tianshu Zhao
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Correspondence to Wenting Zou or Tianshu Zhao.

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Zhang, P., Liu, Y., Fu, C. et al. Knockdown of long non-coding RNA PCAT1 in glioma stem cells promotes radiation sensitivity. Med Mol Morphol 52, 114–122 (2019). https://doi.org/10.1007/s00795-018-0209-8

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  • DOI: https://doi.org/10.1007/s00795-018-0209-8

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