Rafael Cardoso Maciel Costa Silva, Luis Tan, Danielle Aparecida Rodrigues, Elisa Beatriz Prestes, Caroline Pereira Gomes, Andreza Moreira Gama, Pedro Lagerblad de Oliveira, Claudia Neto Paiva, Benedicte Manoury, Marcelo Torres Bozza
BACKGROUND: Chloroquine has been used successfully to treat Malaria, including by chloroquine-resistant Plasmodium sp., indicating that it has effects on disease itself. Since heme has inflammatory effects and contributes to the pathogenesis of hemolytic diseases, we hypothesize that the anti-inflammatory effect of chloroquine is partially due to its inhibitory effect on heme-induced macrophage activation and on inflammatory tissue damage. METHODS: Bone marrow derived macrophages (BMDMs) were incubated with chloroquine before stimulation with heme, in different conditions, to evaluate cytokines secretion, ROS production, mitogen activated protein kinases (MAPK) or spleen tyrosine kinase (Syk) activation, alone or combined with LPS...
September 2021: Free Radical Biology & Medicine