To determine if reducing ROS could preserve muscle morphology, we overexpressed ROS scavengers Catalase (Cat) and superoxide dismutase (Sod1), or antioxidative enzyme glutathione peroxidase 1 (GPx1, previously validated in (Owusu-Ansah and Banerjee, 2009; Ohsawa et al, 2012; Lim et al, 2014)), specifically in the muscles of tumour-bearing animals (QRasV12scribRNAi). The gene discussed is CAT; the disease is neoplasm.