Table 2

Studies utilizing cDNA microarray technology to study asthma

Investigator
Microarray type
Species/Sample size
Summary/Key findings
Normalization procedure

Number of genes
Type of tissue

Replications per data point

Zou et al.32
cDNA 40.000 elements
10 monkeys Lung tissue samples
Microarray profile of differentially expressed genes in a monkey model of allergic asthma.
Ratios of Cy5/Cy3 multiplied to the balance coefficient of the microarray / 3 replicates
Brutsche et al.33
cDNA 600 genes
40 subjects Mononuclear cells
CAGE score for atopy and asthma.
Absolute difference of the expression of CAGE scored genes 1 replicate
Sayama et al.38
cDNA 14.000 genes
human umbilical cord mast cells
Transcriptional response of human mast cells stimulated via the Fc (epsilon) RI and identification of mast cells as a source of IL-11.
Array-specific normalization coefficient was calculated by centering in log base 2 space a dataset consisting of all elements with an I/D> 3-fold / 2 replicates
Brutsche et al.41
cDNA 600 genes
40 subjects Mononuclear cells
Apoptosis signals in atopy and asthma measured with cDNA arrays
G.I was normalized to the housekeeping G.I / 1 replicate
Syed et al. 42
cDNA 12.228 genes
Human CD4+ T cells
CCR7 down-regulation in asthma
Median G.I of each filter normalized any differences in cDNA probe activity between filters/ 1 replicate
Banerjee et al.43
cDNA 1.176 genes
18 mice Lung tissue samples
Gene expression profiling in inflammatory airway disease associated with elevated adenosine
G.I was normalized to the housekeeping G.I / 2 replicates

Abbreviations: CAGE: Composite atopy gene expression, CCR7: Chemokine receptor 7, G.I: Gene Intensity, I/D: Intensity/Background ratio, Th: T helper, RI: Immunoglobulin receptor

Tzouvelekis et al. Respiratory Research 2004 5:26   doi:10.1186/1465-9921-5-26