Center for System Biology, Data Sciences, and Reproductive Health, School of Basic Medical Science, Central South University, Yuelu, Changsha 410013, China.
Laboratory of Molecular and Statistical Genetics, College of Life Sciences, Human Normal University, Changsha 410081, China.
Aging (Albany NY). 2021 Jun 10;13(11):15595-15619. doi: 10.18632/aging.203124.
The homeostasis of bone metabolism depends on the coupling and precise regulation of various types of cells in bone tissue. However, the communication and interaction between bone tissue cells at the single-cell level remains poorly understood. Thus, we performed single-cell RNA sequencing (scRNA-seq) on the primary human femoral head tissue cells (FHTCs). Nine cell types were identified in 26,574 primary human FHTCs, including granulocytes, T cells, monocytes, B cells, red blood cells, osteoblastic lineage cells, endothelial cells, endothelial progenitor cells (EPCs) and plasmacytoid dendritic cells. We identified () and () as novel bone metabolism-related genes. Additionally, we found that several subtypes of monocytes, T cells and B cells were related to bone metabolism. Cell-cell communication analysis showed that collagen, chemokine, transforming growth factor and their ligands have significant roles in the crosstalks between FHTCs. In particular, EPCs communicated with osteoblastic lineage cells closely via the "COL2A1-ITGB1" interaction pair. Collectively, this study provided an initial characterization of the cellular composition of the human FHTCs and the complex crosstalks between them at the single-cell level. It is a unique starting resource for in-depth insights into bone metabolism.
骨代谢的动态平衡依赖于骨组织中各种类型细胞的偶联和精确调节。然而,骨组织细胞在单细胞水平上的通讯和相互作用仍知之甚少。因此,我们对原代人股骨头组织细胞(FHTC)进行了单细胞 RNA 测序(scRNA-seq)。在 26574 个人类原代 FHTC 中鉴定出 9 种细胞类型,包括粒细胞、T 细胞、单核细胞、B 细胞、红细胞、成骨细胞系细胞、内皮细胞、内皮祖细胞(EPC)和浆细胞样树突状细胞。我们鉴定出 ()和 ()为新的骨代谢相关基因。此外,我们发现几种单核细胞、T 细胞和 B 细胞亚型与骨代谢有关。细胞间通讯分析表明,胶原蛋白、趋化因子、转化生长因子及其配体在 FHTC 之间的相互作用中具有重要作用。特别是,EPC 通过“COL2A1-ITGB1”相互作用对与成骨细胞系细胞密切通讯。总之,本研究首次对人 FHTC 的细胞组成及其在单细胞水平上的复杂相互作用进行了描述。它是深入了解骨代谢的独特起点。
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