Malaria pigment hemozoin-induced transcriptional remodeling of mouse hematopoietic stem and progenitor cells, granulocyte-macrophage progenitors, and bone marrow monocytes

Trained immunity is the phenomenon whereby innate immune cells such as monocytes or macrophages, and their progenitors in the bone-marrow, undergo functional reprogramming after exposure to certain microbial and danger signals, altering their responses to future exposures. In this study, we performed a non-lethal Plasmodium yoelii 17XNL (Py) infection in wild-type C57/BL6J mice to investigate the underlying mechanism of Py-induced myelopoiesis and performed transcriptomic analysis on HSPCs, GMPs, and monocytes 6 weeks following exposure. Next cecal ligation and puncture (CLP) was used to model sepsis in vivo as a secondary exposure, and the transcriptomes of PBS and Py-exposed monocytes were generated.