The exposure to H2O2 induced a significant increase in IL-6 transcripts in both healthy (c vs. H2O2: 0.11 ± 0.02 vs. 0.3 ± 0.1, p < 0.05) and SSc fibroblasts (c vs. H2O2: 0.8 ± 0.4 vs. 1.5 ± 0.6, p < 0.01). The gene discussed is IL6; the disease is systemic sclerosis.