GSTP1 and myeloid sarcoma: In view of the role of antioxidants in ageing and neuroprotection, we examined the antioxidant capacity of MS‐MSC demonstrating that MS‐MSC secretion of antioxidants superoxide dismutase 1 (SOD1) and glutathione S‐transferase P (GSTP) is reduced and correlates negatively with the duration of progressive phase of MS.