MiR-132/212 promotes the growth of precartilaginous stem cells (PCSCs) by regulating Ihh/PTHrP signaling pathway
Autor: | Zhi-Xiong Guo, Jianfeng Fang, Guang-Hao Su, Xiao-dong Wang, Gao Yu, Ya Liu, Chunhua Yin, Yun-fang Zhen, Wen-Yan Zhang, Jin Dai, Zhen-hua Zhu, Quanwen Yuan, Tan-Tan Zhao, Fu-Yong Zhang, Ya Zhang, Xu Cao, Lun-qing Zhu |
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Rok vydání: | 2020 |
Předmět: |
Cartilage
Articular precartilaginous stem cells Indian hedgehog Cyclopamine hedgehog medicine.medical_treatment Primary Cell Culture Biophysics Ihh/PTHrP Apoptosis Fibroblast growth factor Biochemistry chemistry.chemical_compound Chondrocytes medicine Animals Hedgehog Proteins Viability assay Molecular Biology Cells Cultured Research Articles Cell Proliferation biology Chemistry Stem Cells Growth factor Parathyroid Hormone-Related Protein Veratrum Alkaloids Cell Biology Transfection biology.organism_classification Hedgehog signaling pathway Cell biology Patched-1 Receptor Adult Stem Cells MicroRNAs miR-132/212 Multigene Family Rabbits Stem cell |
Zdroj: | Bioscience Reports |
ISSN: | 1573-4935 0144-8463 |
Popis: | Precartilaginous stem cells (PCSCs) are adult stem cells that can initiate chondrocytes and bone development. In the present study, we explored whether miR-132/212 was involved in the proliferation of PCSCs via Hedgehog signaling pathway. PCSCs were isolated and purified with the fibroblast growth factor receptor-3 (FGFR-3) antibody. Cell viability, DNA synthesis and apoptosis were measured using MTT, BrdU and flow cytometric analysis. The mRNA and protein expression were detected by real-time PCR and Western blot, respectively. The target gene for miR-132/212 was validated by luciferase reporter assay. Results showed that transfection with miR-132/212 mimic significantly increased cell viability and DNA synthesis, and inhibited apoptosis of PCSCs. By contrast, miR-132/212 inhibitor could suppress growth and promote apoptosis of PCSCs. Luciferase reporter assays indicated that transfection of miR-132/212 led to a marked reduction of luciferase activity, but had no effect on PTCH1 3′-UTR mutated fragment, suggesting that Patched1 (PTCH1) is a target of miR-132/212. Furthermore, treatment with miR-132/212 mimics obviously increased the protein expression of Indian hedgehog (Ihh) and parathyroid hormone related protein (PTHrP), which was decreased after treatment with Hedgehog signaling inhibitor, cyclopamine. We also found that inhibition of Ihh/PTHrP signaling by cyclopamine significantly suppressed growth and DNA synthesis, and induced apoptosis in PCSCs. These findings demonstrate that miR-132/212 promotes growth and inhibits apoptosis in PCSCs by regulating PTCH1-mediated Ihh/PTHrP pathway, suggesting that miR-132/212 cluster might serve as a novel target for bone diseases. |
Databáze: | OpenAIRE |
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