HMOX1 and post-traumatic stress disorder: Post-traumatic stress disorder (PTSD) is a type of depression syndrome, and Xie et al. (2024) found that polysaccharides from Polygonatum cyrtonema Hua can improve PTSD-induced behavioral abnormalities and synaptic damage in mice by reducing oxidative stress and neuroinflammation, and by acting on the Nrf2/HO-1 signaling pathway.