Table 1

Studies utilizing microarray technology to analyze IPF

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

Number of genes
Type of tissue

Replications per data point

Zuo et al.22
Oligonucleotide 8.400 genes
5 patients with IPF Lung tissue specimens
Gene expression analysis reveals matrilysin as a key regulator of PF in mice and humans.
Gene expression levels normalized by a scaling factor multiplied to the average of differences of probe pairs (matched-mismatched) / 2 replicates
Kaminski et al.23
Oligonucleotide 6.000 genes
30 mice Lung tissue specimens
Global analysis of gene expression in PF reveals distinct programs regulating lung inflammation and fibrosis.
Mean hybridization intensities of all probe sets on each array were scaled to an arbitrary, fixed level/4 replicates
Katsuma et al. 24
cDNA 4.224 genes
22 mice Lung tissue samples
Molecular monitoring of bleomycin-induced pulmonary fibrosis by cDNA microarray-based gene expression profiling.
Quantified signal intensities were converted by logarithms of base two 4 replicates
Chambers et al. 25
Oligonucleotide 6.000 genes
Human lung fibroblasts
Global expression profiling of fibroblast responses to transforming growth factor-beta1 reveals the induction of ID1.
Gene expression levels normalized by a scaling factor multiplied to the average of differences of probe pairs (matched-mismatched)/ 2 replicates
Liu et al.26
cDNA 10.000 genes
12 rats Lung tissue specimens
FIZZ1 stimulation of myofibroblast differentiation.
Average median ratios Cy3/Cy5 values normalized to 1.0/ 4 replicates

Abbreviations: ID: Inhibitor of Differentiation, IPF: Idiopathic Pulmonary Fibrosis, PF: Pulmonary Fibrosis

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