Treatment-naïve Primary Osteosarcoma's Cellular and Molecular Heterogeneity is Revealed by Single-cell Rna Sequencing in Canines

A diverse, aggressive bone cancer that disproportionately affects children and teenagers is called osteosarcoma (OS). The complicated tumor microenvironment (TME) of OS contributes to the paucity of therapeutic treatments. Therefore, in six treatment-naïve dogs with TME, we utilized single-cell RNA sequencing (scRNAseq) to characterize its cellular and molecular makeup. Primary OS that arises on its own. By examining 35,310 cells, we were able to characterize eight tumor-associated macrophage (TAM) populations, mature regulatory dendritic cells (mregDCs), and follicular helper T cells, among other 41 transcriptomically different cell types. According to cell-cell interaction study, TAMs and mregDCs are important players in the regulation of T cell-mediated immunity. Additionally, we discovered a high degree of similarity after completing a cross-species cell type gene signature homology study.