 This study investigated the effects of focused ultrasound on rheumatoid arthritis, RA. The researchers found that ultrasound therapy was effective at reducing the severity of arthritis symptoms in an arthritis mouse model. They also conducted detailed analyses of the immune system of the mice, finding that certain types of immune cells were more responsive to ultrasound than others. This suggests that ultrasound may be able to target specific immune cells to treat RA. This article was authored by Xu Chou Hu, Fei Li, Jiyin Zeng, and others.