BAG3 and idiopathic pulmonary fibrosis: In addition, like we did for IPF fibroblasts, we also treated primary donor lung fibroblasts, human embryonic kidney (HEK) cells and HeLa cells with Pirf, Aza, Ctd or with Pirf + Aza or Pirf + Ctd in order to study if these drugs exert similar effects on BAG3 protein levels in other cells.