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Published in: Journal of Bone and Mineral Metabolism 1/2022

01-01-2022 | Osteoporosis | Original Article

LINC02381, a sponge of miR-21, weakens osteogenic differentiation of hUC-MSCs through KLF12-mediated Wnt4 transcriptional repression

Authors: Gang Zhao, Wen-Dong Luo, Yong Yuan, Feng Lin, Li-Min Guo, Jing-Jing Ma, Han-Bo Chen, Huang Tang, Jun Shu

Published in: Journal of Bone and Mineral Metabolism | Issue 1/2022

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Abstract

Introduction

Human umbilical cord blood-derived MSCs (hUC-MSCs) have the potential to differentiate into osteoblasts. This study investigated the function and potential mechanisms of a novel lncRNA LINC02381 in hUC-MSC osteogenic differentiation.

Materials and methods

hUC-MSCs were maintained in osteogenic differentiation medium. RT-qPCR assay was performed to assess LINC02381 expression. Alizarin Red S (ARS) and alkaline phosphatase (ALP) staining were performed to evaluate osteogenic differentiation. The interaction between miR-21 and LINC0238/KLF12 was determined by luciferase reporter and RNA immunoprecipitation (RIP) assays. Chromatin immunoprecipitation (ChIP) assay was used to confirm the transcriptional regulation of KLF12 on Wnt4 promoter. The nuclear translocation of β-catenin was evaluated using immunofluorescence. hUC-MSCs seeded on Bio-Oss Collagen scaffolds were transplanted into nude mice to assess in vivo osteogenesis. Bone formation was observed by H&E and Masson's trichrome staining. OSX and OPN levels were assessed by immunohistochemistry.

Results

LINC02381 was up-regulated in the clinical samples of osteoporotic patients. However, LINC02381 expression was reduced during osteogenic differentiation of hUC-MSCs. Enforced expression of LINC02381 suppressed the osteogenic differentiation of hUC-MSCs. Mechanistically, LINC02381 sponged miR-21 to enhance KLF12 expression, which led to the inactivation of Wnt/β-catenin signaling pathway. Furthermore, miR-21 mimics or KLF12 silencing counteracted LINC02381-induced inhibition of osteogenic differentiation, whereas IWP-4 (an inhibitor of Wnt pathway) abolished this effect.

Conclusion

In summary, LINC02381 repressed osteogenic differentiation of hUS-MSCs through sponging miR-21 to enhance KLF12-mediated inactivation of Wnt/β-catenin pathway, indicating that LINC02381 might be a therapeutic target for osteoporosis.
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Metadata
Title
LINC02381, a sponge of miR-21, weakens osteogenic differentiation of hUC-MSCs through KLF12-mediated Wnt4 transcriptional repression
Authors
Gang Zhao
Wen-Dong Luo
Yong Yuan
Feng Lin
Li-Min Guo
Jing-Jing Ma
Han-Bo Chen
Huang Tang
Jun Shu
Publication date
01-01-2022
Publisher
Springer Singapore
Published in
Journal of Bone and Mineral Metabolism / Issue 1/2022
Print ISSN: 0914-8779
Electronic ISSN: 1435-5604
DOI
https://doi.org/10.1007/s00774-021-01277-4

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