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Author Spotlight: RNA FISH for Locating lncRNA-SNHG6 in Osteosarcoma Cells
Published on: June 16, 2023
Single-cell RNA-seq identification of four differentially expressed survival-related genes by a TARGET: Osteosarcoma
Mesalie Feleke1, Wenyu Feng2, Emel Rothzerg1
1School of Biomedical Sciences, The University of Western Australia, Perth, WA 6009, Australia.
Abstract:
Osteosarcoma (OS) differentially expressed genes (DEGs) have been predicted using the data portal of the Therapeutically Applicable Research to Generate Effective Treatments (TARGET). In this study, we sought to identify cell types that specially express key DEGs (MUC1, COL13A1, JAG2, and KAZALD1) in each of the nine identified cell populations derived from tissues of OS tumors with single-cell RNA-sequencing data. Gene expression levels were pairwise compared between cell clusters and a p value < 0.05 was considered differentially expressed. It was revealed that MUC1 is expressed at high levels in osteoblastic OS cells followed by carcinoma-associated fibroblasts (CAFs) and plasmocytes, respectively. COL13A1 is highly expressed in osteoblastic OS cells, CAFs, and endothelial cells (ECs), respectively. The KAZALD1 gene is expressed in CAFs and osteoblastic OS cells at high levels, but at very low levels in plasmocytes, osteoclasts, NK/T, myeloid cells 1, myeloid cells 2, ECs, and B cells. JAG2 is expressed at significantly high levels in ECs and osteoblastic OS cells, and at relatively lower levels in all other cell types. Interestingly, LSAMP, as an established gene in the development of OS shows high expression in osteoblastic OS cells and CAFs but low in other cells such as osteoclasts. Our findings here highlight the heterogeneity of OS cells and cell-type-dependent DEGs which have potential as therapeutic targets in OS.
Insights
Researchers identified specific cell types expressing key genes in osteosarcoma (OS) tumors. These cell-type-dependent differentially expressed genes (DEGs) in OS offer potential new therapeutic targets.
Area of Science:
- Oncology
- Genomics
- Molecular Biology
Background:
- Osteosarcoma (OS) is a primary bone cancer with complex cellular heterogeneity.
- Identifying specific gene expression patterns within different cell types in OS is crucial for understanding tumor biology and developing targeted therapies.
Purpose of the Study:
- To identify specific cell types expressing key differentially expressed genes (DEGs) in osteosarcoma (OS) tumors.
- To investigate the cell-type-specific expression profiles of genes including MUC1, COL13A1, JAG2, and KAZALD1 within OS tumor microenvironments.
Main Methods:
- Utilized single-cell RNA-sequencing data from OS tumor tissues.
- Analyzed gene expression levels across nine identified cell populations.
- Performed pairwise comparisons between cell clusters to identify differentially expressed genes (DEGs) with a p-value < 0.05.
Main Results:
- MUC1 showed high expression in osteoblastic OS cells, followed by carcinoma-associated fibroblasts (CAFs) and plasmocytes.
- COL13A1 was highly expressed in osteoblastic OS cells, CAFs, and endothelial cells (ECs).
- KAZALD1 was highly expressed in CAFs and osteoblastic OS cells, with low levels in other cell types.
- JAG2 demonstrated high expression in ECs and osteoblastic OS cells.
- LSAMP, a known OS development gene, was highly expressed in osteoblastic OS cells and CAFs.
Conclusions:
- Osteosarcoma (OS) exhibits significant cellular heterogeneity.
- Key differentially expressed genes (DEGs) show distinct expression patterns across various cell types within OS tumors.
- These cell-type-dependent DEGs represent potential novel therapeutic targets for osteosarcoma.
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