Liangkun Xie1, Jianzhong Chen2, Xiaobin Ren3, Mingzhu Zhang3, Nattawut Thuaksuban4, Thongchai Nuntanaranont5, Zheng Guan6. 1. Department of Oral Implantology, the Affiliated Stomatology Hospital of Kunming Medical University, Kunming, China; Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand. 2. Department of Oral Anatomy and Physiology, School of Stomatology, Kunming Medical University, Kunming, China. 3. Department of Periodontology, the Affiliated Stomatology Hospital of Kunming Medical University, Kunming, China. 4. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand. 5. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Hatyai, Songkhla, Thailand. Electronic address: tnuntanaranont@gmail.com. 6. Biomedical Research Center, the Affiliated Calmette Hospital of Kunming Medical University (the First Hospital of Kunming), Kunming, China. Electronic address: jasmin_067@163.com.
Abstract
OBJECTIVE: This study investigated circRNA and lncRNA expression profile in exosomes derived from periodontal ligament stem cell (PDLSC) before and after its osteogenic differentiation. DESIGN: Exosomes derived from PDLSCs before (EX0) and after osteogenic induction for 5 (EX5) and 7 (EX7) days were harvested and exosomal circRNAs and lncRNAs were analyzed by RNA sequencing. Certain RNAs showing significantly altered expression were selected for qRT-PCR verification. The circRNA-miRNA-mRNA network and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses were performed. RESULTS: All groups of exosomes showed typical characteristics under nanoparticle tracking analysis, flow cytometry assay and transmission electron microscopy. 69-557 circRNAs and 2907-11581 lncRNAs were found in EX0, EX5 and EX7, which were broadly distributed across the 24 pairs of human chromosomes. Compared with EX0, 3 circRNAs and 2 lncRNAs were up-regulated and 39 circRNAs and 5 lncRNAs down-regulated consistently through out of EX5 and EX7, p < 0.05. qRT-PCR confirmed certain those consistently expressed RNAs, such as circ lysophosphatidic acid receptor 1 (LPAR1). KEGG analysis showed that those consistent expressed RNAs closely related to TGF-beta pathway, MAPK pathway, mTOR pathway and FoxO signaling pathways regulating pluripotency of stem cells. CONCLUSIONS: Exosomal circRNAs and lncRNAs had significant expression changes during the early phase of osteogenic differentiation of PDLSCs. Further study would be taken for understanding the roles of exosomal circRNAs and lncRNAs playing in osteogenic differentiation of PDLSCs.
OBJECTIVE: This study investigated circRNA and lncRNA expression profile in exosomes derived from periodontal ligament stem cell (PDLSC) before and after its osteogenic differentiation. DESIGN: Exosomes derived from PDLSCs before (EX0) and after osteogenic induction for 5 (EX5) and 7 (EX7) days were harvested and exosomal circRNAs and lncRNAs were analyzed by RNA sequencing. Certain RNAs showing significantly altered expression were selected for qRT-PCR verification. The circRNA-miRNA-mRNA network and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses were performed. RESULTS: All groups of exosomes showed typical characteristics under nanoparticle tracking analysis, flow cytometry assay and transmission electron microscopy. 69-557 circRNAs and 2907-11581 lncRNAs were found in EX0, EX5 and EX7, which were broadly distributed across the 24 pairs of human chromosomes. Compared with EX0, 3 circRNAs and 2 lncRNAs were up-regulated and 39 circRNAs and 5 lncRNAs down-regulated consistently through out of EX5 and EX7, p < 0.05. qRT-PCR confirmed certain those consistently expressed RNAs, such as circ lysophosphatidic acid receptor 1 (LPAR1). KEGG analysis showed that those consistent expressed RNAs closely related to TGF-beta pathway, MAPK pathway, mTOR pathway and FoxO signaling pathways regulating pluripotency of stem cells. CONCLUSIONS: Exosomal circRNAs and lncRNAs had significant expression changes during the early phase of osteogenic differentiation of PDLSCs. Further study would be taken for understanding the roles of exosomal circRNAs and lncRNAs playing in osteogenic differentiation of PDLSCs.
Authors: Weijun Yu; Qisheng Gu; Di Wu; Weiqi Zhang; Gang Li; Lu Lin; Jared M Lowe; Shucheng Hu; Tia Wenjun Li; Zhen Zhou; Michael Z Miao; Yuhua Gong; Yifei Zhao; Eryi Lu Journal: J Periodontal Res Date: 2022-04-06 Impact factor: 3.946