NDLI: Gamma radiation induces senescence in human adult mesenchymal stem cells from bone marrow and periodontal ligaments

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Gamma radiation induces senescence in human adult mesenchymal stem cells from bone marrow and periodontal ligaments

Content Provider	Scilit
Author	Cmielova, Jana Havelek, Radim Soukup, Tomas Jiroutová, Alena Visek, Benjamin Suchánek, Jakub Vavrova, Jirina Mokry, Jaroslav Muthna, Darina Bruckova, Lenka Filip, Stanislav English, Denis Rezacova, Martina
Copyright Year	2012
Description	Journal: International Journal of Radiation Biology Purpose: Mesenchymal stem cells isolated from bone marrow (BM-MSC) and periodontal ligament (PLSC) are cells with high proliferative potential and ability to self-renewal. Characterization of these cells under genotoxic stress conditions contributes to the assessment of their prospective usage. The aim of our study was to evaluate changes in BM-MSC and PLSC caused by ionizing radiation. Methods: Human BM-MSC and PLSC were irradiated with the doses up to 20 Gy by Co60 and observed 13 days; viability, proliferation, apoptosis and senescence induction, and changes in expression and phosphorylation status of related proteins were studied. Results: Irradiation with the doses up to 20 Gy significantly reduces proliferation, but has no significant effect on cell viability. The activation of tumor suppressor protein 53 (p53) and its phosphorylations on serines 15 and 392 were detected from the first day after irradiation by 20 Gy and remained elevated to day 13. Expression of cyclin-dependent kinases inhibitor 1A (p21Cip1/Waf1) increased. The cell cycle was arrested in G2 phase. Instead of apoptosis we have detected hallmarks of stress-induced premature senescence: increase in cyclin-dependent kinases inhibitor 2A (p16INK4a) and increased activity of senescence-associated β-galactosidase. Conclusion: Mesenchymal stem cells isolated from bone marrow and periodontal ligament respond to ionizing radiation by induction of stress-induced premature senescence without apparent differences in their radiation response.
Related Links	https://www.tandfonline.com/doi/pdf/10.3109/09553002.2012.666001
Ending Page	404
Page Count	12
Starting Page	393
ISSN	09553002
e-ISSN	13623095
DOI	10.3109/09553002.2012.666001
Journal	International Journal of Radiation Biology
Issue Number	5
Volume Number	88
Language	English
Publisher	Informa UK Limited
Publisher Date	2012-05-01
Access Restriction	Open
Subject Keyword	Journal: International Journal of Radiation Biology Premature Senescence Mesenchymal Stem Cell Periodontal Ligament
Content Type	Text
Subject	Radiology, Nuclear Medicine and Imaging Radiological and Ultrasound Technology

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