Une délégation internationale de bouddhistes explore l'héritage vivant du bouddhisme tibétain à Lhassa
https://francais.cgtn.com/news/2025-04-19/1913502230703972353/index.html
New research shows: #Ebola and #Lassa viruses trigger very different responses in human liver cells. While Ebola causes massive cell damage, triggering stress responses, the effect of Lassa remains surprisingly mild.
Read more in the preprint:
🔗 https://www.biorxiv.org/content/10.1101/2025.02.17.638665v1
Ebola and Lassa viruses require biosafety-level-4 (BSL4) containment, infect the liver, and cause deadly hemorrhagic fevers. The cellular effects of these viruses, and whether different families of hemorrhagic-fever viruses elicit similar effects, remain fundamental questions in BSL4 virology. Here, we introduce a new metabolic selection approach to create nearly-pure hepatocytes from human pluripotent stem cells, killing non-liver cells by withholding essential nutrients. Unexpectedly, Ebola and Lassa exerted starkly different effects on human hepatocytes. Ebola infection activated the integrated stress response (ISR) and WNT pathways in hepatocytes in vitro and killed them, whereas Lassa did not. Within non-human primates, Ebola likewise infected hepatocytes and activated ISR signaling in vivo. In summary, we present a single-cell transcriptional and chromatin accessibility roadmap of human hepatocyte differentiation, purification, and viral infection. ### Competing Interest Statement The authors have declared no competing interest.