MPO (Myeloperoxidase): MPO is an enzyme most abundantly expressed in neutrophils and is part of the host defense system. It produces hypochlorous acid and other reactive substances from hydrogen peroxide to kill bacteria and other pathogens. While essential for microbial defense, MPO activity can also contribute to tissue damage during inflammatory responses and has been implicated in various diseases, including cardiovascular diseases, due to its role in oxidative stress....