Project description:Pseudotime analysis, cytotrace, velocity was used to determine the source of subpopulation. To compare the difference between PVNS and steady state synovium, we conduct collaborated analysis containing both PVNS and OA synovium. Qusage analysis reveal the difference of the subsets between them. We for the first time using single cell analysis delineating PVNS cell atlas and have deepen understanding toward PVNS Presumed function and source of certain subpopulation might be the future target that worth trying. We also locate major subpopulation that is responsible for its unremitting inflammation, angiogenesis and invasiveness.
Project description:The study presents: - an optimized synovium dissociation protocol for single cell RNA-sequencing studies of the human synovium. The protocol enables the isolation of high yield of viable synovial cells from prospectively collected fresh synovial biopsies from patients with inflammatory arthritis with a minimal sample droupout. The protocol is derived from the method for dissociation of cryopreserved synovia published by Donlin and colleagues (Arthritis Res. Ther. 2019). - a reference single-cell atlas of fresh human synovium in inflammatory arthritis, comprising more than 100´000 unsorted synovial scRNA-seq profiles from 27 freshly dissociated synovia of patients with different types of inflammatory arthritis. The synovial cells segregate into ten lymphoid, 14 myeloid and 17 stromal synovial cell populations and subpopulations, including synovial neutrophils, representing broadly representing the cellular heterogeneity and composition of the human synovium in inflammatory arthritis.
Project description:Infrapatellar fat pad (IPFP) and synovium, two joint tissues next to each other, play essential roles in regulating joint homeostasis and the progression of knee osteoarthritis (OA). However, the mechanisms regulating their function under healthy and diseased conditions are largely unknown. This study aims to analyze the cellular heterogeneity of these two tissues from normal and OA patients. Single cell and single nuclei transcriptomic profiling were performed on IPFP/synovium cells from four healthy donors and five OA patients. Subsequent bioinformatic analyses identified cell clusters, delineated differentiation routes of mesenchymal cells and macrophages, and identified novel cell-to-cell communication pathways in joint tissue.
Project description:To investigate differentially expressed lncRNAs,circRNAs,miRNAs and mRNAs in synovium of human temporomandibular joint osteoarthritis (TMJOA), we performed RNA high-throughput sequencing in synovium of human TMJOA. We then performed gene expression profiling analysis using data obtained from RNA-seq .
Project description:To investigate differentially expressed miRNAs in synovium of human temporomandibular joint osteoarthritis (TMJOA), we performed miRNA high-throughput sequencing in synovium of human TMJOA.
Project description:Ectopic lymphoid structures (ELS) can develop in rheumatoid arthritis (RA) synovial tissue, but the precise pathways of B cell activation and selection are not well understood. Here, we identified a unique B cell population in the synovium characterized by co-expression of a family of orphan nuclear receptors, NR4A1 (also known as NUR77), NR4A2 (NURR1) and NR4A3 (NOR1), that is highly enriched at both early and late stages of RA. See doi:10.1101/2021.05.14.443150 for details.