The goal of AnalyteExplorer is to pre-process data for the AnalyteExplorer module in ImmuneSpace.

You can install the development version of AnalyteExplorer from GitHub with:

# install.packages("remotes")
remotes::install_github("RGLab/AnalyteExplorer")

library(AnalyteExplorer)
library(UpdateAnno)
options(debug_dir = tempdir())
labkey.url.base <- "https://datatools.immunespace.org"
labkey.url.path <- "/AnalyteExplorer"

genes <- process_data("genes")
validate(genes)
res <- update_table(genes)

cohorts <- process_data("cohorts")
validate(cohorts)
res <- update_table(cohorts)

btm <- process_data("blood_transcription_modules")
validate(btm)
res <- update_table(btm)

signatures <- process_data("gene_signatures")
validata(signautres)
res <- update_table(signatures)

summaries <- process_data("gene_expression_summaries")
validate(summaries)
res <- update_table(summaries)

• Based on Molecular signatures of antibody responses derived from a systems biological study of 5 human vaccines
• The function updates the gene symbols with Hugo.
• This table is used to display metadata about the selected module in the app.

• This function creates a gene expression table by cohort, timepoint, and analyte type (gene, blood transcript module, or gene signature).
• Processing steps:
  1. Fetch gene expression matrices and metadata from ImmuneSpace and combine them into one ExpressionSet object.
     • Remove genes that are not available in all expression matrices.
  2. Remove samples that have negative timepoint and select one timepoint if sample has multiple baseline timepoints.
  3. Create gene expression table summarized by analyte type.
     1. In sample level, when summarizing by blood transcript module or gene signature, compute geometric mean of the expression values of the genes in the module or signature
     2. In cohort level, compute the fold change of the expression values for all combinations of timepoints comparing to the baseline timepoint.
     3. Compute mean and standard deviation of those fold change values by analyte type
  4. Merge the three summarized tables