Horses with acute inflammation linked to a high risk of osteoarthritis had lower levels of inflammation and higher levels of beneficial macrophages in knee joints injected with macrophages isolated from autologous bone marrow aspirate. The study, by veterinarians at Virginia-Maryland College of Veterinary Medicine, suggests that the therapy can prevent development of OA and may be a point-of-care option for treatment of joint trauma, says veterinarian Bruno Menarim.