Journal: bioRxiv
Article Title: The gene expression landscape of the human locus coeruleus revealed by single-nucleus and spatially-resolved transcriptomics
doi: 10.1101/2022.10.28.514241
Figure Lengend Snippet: We applied nnSVG , a method to identify spatially variable genes (SVGs), in the Visium SRT samples. We ran nnSVG within each contiguous tissue area containing a manually annotated LC region (13 tissue areas in the N =8 Visium samples) and calculated an overall ranking of top SVGs by averaging the ranks per gene from each tissue area. (A) The top 50 ranked SVGs from this analysis included a subset (11 out of 50) of genes that were highly ranked in samples from only one donor (Br8079, genes highlighted in maroon). We determined that this was due to the inclusion of a section of the choroid plexus adjacent to the LC for this donor. Bars show the number of times (out of 13 tissue areas) each gene was included within the top 100 SVGs. Rows are ordered by overall average ranking in descending order. (B) Spatial expression of CAPS , a choroid plexus marker gene, in the N =8 Visium samples. (C) Histology image showing the two tissue areas for sample Br8079_LC_round3. (D) In order to focus on LC-associated SVGs, we calculated an overall average ranking of SVGs that were each included within the top 100 SVGs in at least 10 out of the 13 tissue areas, which identified 32 highly-ranked, replicated LC-associated SVGs. Boxplots show the ranks in each tissue area. Rows are ordered by the overall average ranking in descending order.
Article Snippet: The SRT data using the 10x Genomics Visium platform captures around 1-10 cells per measurement location in the human brain, and future studies could apply a higher-resolution platform to characterize expression at single-cell or sub-cellular spatial resolution.
Techniques: Expressing, Marker