Question: How to determine fibroblast contamination by expression profile
gravatar for b.bearmi
11 weeks ago by
b.bearmi0 wrote:

I've got a series of data for a certain tissue, a type of cancer). We suspect that when tissues were sampled (biopsy/surgery) we end up with a mixture of different tissues, so when we do the analysis, it is not just the target tissue + tumour cells, it will also have a significant proportion of fibroblasts swiped along. Surgeries are supposed to err on the safe side after all.

How do I approach this from the analysis point of view? For starters, I would like to know, based on the expression profiles of my samples, how big is the fibroblast component?

rna-seq expression-profile • 148 views
ADD COMMENTlink modified 4 weeks ago by Biostar ♦♦ 20 • written 11 weeks ago by b.bearmi0

Unless you know of a fibroblast specific marker gene this does not sound feasible. Did a pathologist look at the tissue? Perhaps there was some indication there.

ADD REPLYlink written 11 weeks ago by genomax65k

I can certainly find some fibroblast-specific markers, based on this ResearchGate discussion, they would be FSP1, collagens (I, III) - COL1A2; COL3A1, Thymic stromal lymphopoietin (TSLP) and Vimentin - VIM. Data is mostly open source, not every expression data is published with a histology plate attached, so far I am looking from strictly bioinformatics point of view.

ADD REPLYlink written 11 weeks ago by b.bearmi0

I am afraid that this is a wet-lab problem, not a bioinformatics problem. Maybe a strange comparison, but what if the wet-lab members design a poor PCR, do they go to the bioinformatician then with an empty gel image and ask to fix it? Better would be to design better primers.

ADD REPLYlink written 4 weeks ago by Benn6.6k

Here I would suggest to do some gene enrichment analysis for set of genes expressed from your sample against expression profile of fibrobalst. May be that will give idea about the fibroblast component in your sample

ADD REPLYlink written 11 weeks ago by Prakash920
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