lncRNA HOTAIR Inhibits Mineralization in Osteoblastic Osteosarcoma Cells by Epigenetically Repressing ALPL

lncRNA HOTAIR Inhibits Mineralization in Osteoblastic Osteosarcoma Cells by Epigenetically... HOTAIR is a lncRNA that plays critical role in gene regulation and chromatin dynamics through epigenetic mechanisms. In this work we studied the physiological role of HOTAIR during the process of mineralization using osteoblastic osteosarcoma cells focusing in ALPL (Tissue Non-Specific Alkaline Phosphatase), a pivotal gene that controls bone formation. HOTAIR knockdown resulted in upregulation of ALPL, increase of alkaline phosphatase (ALP) activity, and enhanced mineralization in osteoblastic SaOS-2 cells cultured in mineralizing medium. Luciferase assays using reporter vectors containing ALPL promoter showed that HOTAIR repression increases ALPL promoter activity. Furthermore, HOTAIR knockdown increased histone H3K4 methylation levels at ALPL promoter region, suggesting that ALPL repression by HOTAIR is regulated by epigenetic mechanisms. This work supports that physiological bone formation is epigenetically regulated by a lncRNA. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Calcified Tissue International Springer Journals

lncRNA HOTAIR Inhibits Mineralization in Osteoblastic Osteosarcoma Cells by Epigenetically Repressing ALPL

Misawa, Aya; Orimo, Hideo
Calcified Tissue International, Volume 103 (4) – May 30, 2018
9 pages
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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Life Sciences; Biochemistry, general; Endocrinology; Orthopedics; Cell Biology
ISSN
0171-967X
eISSN
1432-0827
D.O.I.
10.1007/s00223-018-0434-0
Publisher site
See Article on Publisher Site

Abstract

HOTAIR is a lncRNA that plays critical role in gene regulation and chromatin dynamics through epigenetic mechanisms. In this work we studied the physiological role of HOTAIR during the process of mineralization using osteoblastic osteosarcoma cells focusing in ALPL (Tissue Non-Specific Alkaline Phosphatase), a pivotal gene that controls bone formation. HOTAIR knockdown resulted in upregulation of ALPL, increase of alkaline phosphatase (ALP) activity, and enhanced mineralization in osteoblastic SaOS-2 cells cultured in mineralizing medium. Luciferase assays using reporter vectors containing ALPL promoter showed that HOTAIR repression increases ALPL promoter activity. Furthermore, HOTAIR knockdown increased histone H3K4 methylation levels at ALPL promoter region, suggesting that ALPL repression by HOTAIR is regulated by epigenetic mechanisms. This work supports that physiological bone formation is epigenetically regulated by a lncRNA.

Journal

Calcified Tissue International – Springer Journals

Published: May 30, 2018

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