# NACHO Analysis

### A NAnostring quality Control dasHbOard

#### Mickaël Canouil, Ph.D., Gerard A. Bouland and Roderick C. Slieker, Ph.D.

#### January 12, 2024

# 1 Installation

    # Install NACHO from CRAN:
    install.packages("NACHO")

    # Or the the development version from GitHub:
    # install.packages("remotes")
    remotes::install_github("mcanouil/NACHO")

# 2 Overview

NACHO (NAnostring quality Control dasHbOard) is developed for NanoString nCounter data.
NanoString nCounter data is a messenger-RNA/micro-RNA (mRNA/miRNA) expression assay and works with fluorescent barcodes.
Each barcode is assigned a mRNA/miRNA, which can be counted after bonding with its target.
As a result each count of a specific barcode represents the presence of its target mRNA/miRNA.

NACHO is able to load, visualise and normalise the exported NanoString nCounter data and facilitates the user in performing a quality control.
NACHO does this by visualising quality control metrics, expression of control genes, principal components and sample specific size factors in an interactive web application.

With the use of two functions, RCC files are summarised and visualised, namely: `load_rcc()` and `visualise()`.

- The `load_rcc()` function is used to preprocess the data.
- The `visualise()` function initiates a Shiny-based dashboard that visualises all relevant QC plots.

NACHO also includes a function `normalise()`, which (re)calculates sample specific size factors and normalises the data.

- The `normalise()` function creates a list in which your settings, the raw counts and normalised counts are stored.

In addition (since v0.6.0) NACHO includes two (three) additional functions:

- The `render()` function renders a full quality-control report (HTML) based on the results of a call to `load_rcc()` or `normalise()` (using `print()` in a Rmarkdown chunk).
- The `autoplot()` function draws any quality-control metrics from `visualise()` and `render()`.

For more `vignette("NACHO")` and `vignette("NACHO-analysis")`.

Canouil M, Bouland GA, Bonnefond A, Froguel P, Hart L, Slieker R (2019). “NACHO: an R package for quality control of NanoString nCounter data.” Bioinformatics. ISSN 1367-4803, doi:10.1093/bioinformatics/btz647.

    @Article{,
      title = {{NACHO}: an {R} package for quality control of {NanoString} {nCounter} data},
      author = {Mickaël Canouil and Gerard A. Bouland and Amélie Bonnefond and Philippe Froguel and Leen Hart and Roderick Slieker},
      journal = {Bioinformatics},
      address = {Oxford, England},
      year = {2019},
      month = {aug},
      issn = {1367-4803},
      doi = {10.1093/bioinformatics/btz647},
    }

# 3 Analyse NanoString data

## 3.1 Load packages

    library(NACHO)
    library(GEOquery, quietly = TRUE, warn.conflicts = FALSE)
    ## Error in library(GEOquery, quietly = TRUE, warn.conflicts = FALSE): there is no package called 'GEOquery'

## 3.2 Download `GSE70970` from GEO (or use your own data)

    data_directory <- file.path(tempdir(), "GSE70970", "Data")

    # Download data
    gse <- getGEO("GSE70970")
    ## Error in getGEO("GSE70970"): could not find function "getGEO"
    getGEOSuppFiles(GEO = "GSE70970", baseDir = tempdir())
    ## Error in getGEOSuppFiles(GEO = "GSE70970", baseDir = tempdir()): could not find function "getGEOSuppFiles"
    # Unzip data
    untar(
      tarfile = file.path(tempdir(), "GSE70970", "GSE70970_RAW.tar"),
      exdir = data_directory
    )
    ## Warning in untar(tarfile = file.path(tempdir(), "GSE70970",
    ## "GSE70970_RAW.tar"), : '/usr/bin/tar -xf
    ## '/var/folders/gn/mxv05rj52wd1yg1hb018s4s40000gn/T//RtmpQG4XyK/GSE70970/GSE70970_RAW.tar'
    ## -C
    ## '/var/folders/gn/mxv05rj52wd1yg1hb018s4s40000gn/T//RtmpQG4XyK/GSE70970/Data''
    ## returned error code 1
    # Get phenotypes and add IDs
    targets <- pData(phenoData(gse[[1]]))
    ## Error in pData(phenoData(gse[[1]])): could not find function "pData"
    targets$IDFILE <- list.files(data_directory)
    ## Error: object 'targets' not found

## 3.3 Import RCC files

    GSE70970 <- load_rcc(data_directory, targets, id_colname = "IDFILE")
    ## Error in eval(expr, envir, enclos): object 'targets' not found

## 3.4 Perform the analyses using `limma`

    library(limma)
    ## Error in library(limma): there is no package called 'limma'

### 3.4.1 Get the phenotypes

    selected_pheno <- GSE70970[["nacho"]][
      j = lapply(unique(.SD), function(x) ifelse(x == "NA", NA, x)),
      .SDcols = c("IDFILE", "age:ch1", "gender:ch1", "chemo:ch1", "disease.event:ch1")
    ]
    ## Error in eval(expr, envir, enclos): object 'GSE70970' not found
    selected_pheno <- na.exclude(selected_pheno)
    ## Error in eval(expr, envir, enclos): object 'selected_pheno' not found

    ## Error in eval(expr, envir, enclos): object 'selected_pheno' not found

### 3.4.2 Get the normalised counts

    expr_counts <- GSE70970[["nacho"]][
      i = grepl("Endogenous", CodeClass),
      j = as.matrix(
        dcast(.SD, Name ~ IDFILE, value.var = "Count_Norm"),
        "Name"
      ),
      .SDcols = c("IDFILE", "Name", "Count_Norm")
    ]
    ## Error in eval(expr, envir, enclos): object 'GSE70970' not found

    ## Error in eval(expr, envir, enclos): object 'expr_counts' not found

Alternatively, `"Accession"` number is also available.

    GSE70970[["nacho"]][
      i = grepl("Endogenous", CodeClass),
      j = as.matrix(
        dcast(.SD, Accession ~ IDFILE, value.var = "Count_Norm"),
        "Accession"
      ),
      .SDcols = c("IDFILE", "Accession", "Count_Norm")
    ]

### 3.4.3 Select phenotypes and counts

1. Make sure count matrix and phenotypes have the same samples

    samples_kept <- intersect(selected_pheno[["IDFILE"]], colnames(expr_counts))
    ## Error in eval(expr, envir, enclos): object 'selected_pheno' not found
    expr_counts <- expr_counts[, samples_kept]
    ## Error in eval(expr, envir, enclos): object 'expr_counts' not found
    selected_pheno <- selected_pheno[IDFILE %in% c(samples_kept)]
    ## Error in eval(expr, envir, enclos): object 'selected_pheno' not found

2. Build the numeric design matrix

    design <- model.matrix(~ `disease.event:ch1`, selected_pheno)
    ## Error in eval(expr, envir, enclos): object 'selected_pheno' not found

3. `limma`

    eBayes(lmFit(expr_counts, design))
    ## Error in eBayes(lmFit(expr_counts, design)): could not find function "eBayes"

## 3.5 Perform the analyses using `lm` (or any other model)

    GSE70970[["nacho"]][
      i = grepl("Endogenous", CodeClass),
      j = lapply(unique(.SD), function(x) ifelse(x == "NA", NA, x)),
      .SDcols = c(
        "IDFILE", "Name", "Accession", "Count", "Count_Norm",
        "age:ch1", "gender:ch1", "chemo:ch1", "disease.event:ch1"
      )
    ][
      Name %in% head(unique(Name), 10)
    ][
      j = as.data.table(
        coef(summary(lm(
          formula = Count_Norm ~ `disease.event:ch1`,
          data = na.exclude(.SD)
        ))),
        "term"
      ),
      by = c("Name", "Accession")
    ]
    ## Error in eval(expr, envir, enclos): object 'GSE70970' not found