selection of Edge cut-off threshold for spatial colocalisation of cells

[pratapstat]

Hi CellTrek team,

Thanks for this tool which is really useful to test the hypothesis on my spatial data. I would like to know, how to decide which cut-off makes sense for me to look at the spatial colocalization of cells. Please elaborate on this?

For instance, if cell A is interacting with cell B at edge cut-off 0 but not at edge cut-off 0.2? then how to interpret that?

Best Regards,
Pratap
Senior Bioinformatics Specialist,
NCCS,
Singapore

[Puriney]

To me, the cutoff parameter is to help users to get a comfortable level of trimming noise vs keeping results. As long as the edge width is not zero, it implied a co-localization. But then it depends on how much noise/results the users want to show.

[Puriney]

Those 'thin' edge connections are probably what you are most interested in. I think you probably need some orthogonal evidence. Ligand-receptor inference analysis is a very good choice.