PRKG2 and interstitial lung disease: Although the PRKG2 expression levels in pulmonary fibroblasts from SSc-ILD patients compared to those from the normal population in the GSE40839 dataset showed no statistically significant difference, PRKG2 expression levels in pulmonary fibroblasts from SSc-ILD lungs were lower than those in normal lung tissues in both datasets (GSE231693 and GSE40839), with this difference being statistically significant in the GSE231693 dataset.