BACKGROUND: Pirfenidone (PFD) is an antifibrotic agent with beneficial effects on proinflammatory disorders. In this study, we further investigated PFD and long-acting form, "deuterated PFD," immune-modulating properties by evaluating their effects on mouse dendritic cells (DCs). METHODS: The effects of PFD on DCs were examined in vivo using an orthotopic mouse lung transplant model and in vitro using isolated bone marrow-derived DCs in response to lipopolysaccharide and allogeneic stimulation. RESULTS: In mouse lung transplants, PFD and deuterated PFD treatment improved allograft lung function based on peak airway pressure, less infiltrates/consolidation on micro-computed tomography scan imaging, and reduced lung rejection/injury. DC activation from lung allografts was suppressed with PFD, and there seemed to be a greater effect of PFD on CD11c(+)CD11b(-)CD103(+) lung DCs. In addition, PFD reduced the expression of several proinflammatory cytokines/chemokines from lung allografts. In vitro, DCs treated with PFD showed decreased expression of major histocompatibility complex class II and costimulatory molecules and the capacity of these DCs to stimulate T-cell activation was impaired, although antigen uptake was preserved. PFD directly inhibited the release of inflammatory cytokines from isolated DCs, was associated with a reduction of stress protein kinases, and attenuated lipopolysaccharide-dependent mitogen-activated protein kinase p38 phosphorylation. CONCLUSIONS: PFD has lung allograft protective properties, and in addition to its known effects on T-cell biology, PFD immune-modulating activities encompass inhibitory effects on DC activation and function.
BACKGROUND:Pirfenidone (PFD) is an antifibrotic agent with beneficial effects on proinflammatory disorders. In this study, we further investigated PFD and long-acting form, "deuterated PFD," immune-modulating properties by evaluating their effects on mouse dendritic cells (DCs). METHODS: The effects of PFD on DCs were examined in vivo using an orthotopic mouse lung transplant model and in vitro using isolated bone marrow-derived DCs in response to lipopolysaccharide and allogeneic stimulation. RESULTS: In mouse lung transplants, PFD and deuterated PFD treatment improved allograft lung function based on peak airway pressure, less infiltrates/consolidation on micro-computed tomography scan imaging, and reduced lung rejection/injury. DC activation from lung allografts was suppressed with PFD, and there seemed to be a greater effect of PFD on CD11c(+)CD11b(-)CD103(+) lung DCs. In addition, PFD reduced the expression of several proinflammatory cytokines/chemokines from lung allografts. In vitro, DCs treated with PFD showed decreased expression of major histocompatibility complex class II and costimulatory molecules and the capacity of these DCs to stimulate T-cell activation was impaired, although antigen uptake was preserved. PFD directly inhibited the release of inflammatory cytokines from isolated DCs, was associated with a reduction of stress protein kinases, and attenuated lipopolysaccharide-dependent mitogen-activated protein kinase p38 phosphorylation. CONCLUSIONS:PFD has lung allograft protective properties, and in addition to its known effects on T-cell biology, PFD immune-modulating activities encompass inhibitory effects on DC activation and function.
Authors: Luigi Adamo; Lora J Staloch; Cibele Rocha-Resende; Scot J Matkovich; Wenlong Jiang; Geetika Bajpai; Carla J Weinheimer; Attila Kovacs; Joel D Schilling; Philip M Barger; Deepta Bhattacharya; Douglas L Mann Journal: JCI Insight Date: 2018-06-07
Authors: Ye Cui; Kaifeng Liu; Maria E Monzon-Medina; Robert F Padera; Hao Wang; Gautam George; Demet Toprak; Elie Abdelnour; Emmanuel D'Agostino; Hilary J Goldberg; Mark A Perrella; Rosanna Malbran Forteza; Ivan O Rosas; Gary Visner; Souheil El-Chemaly Journal: J Clin Invest Date: 2015-10-20 Impact factor: 14.808