Oxidative stress plays a role in the progression of chronic heart failure (CHF), but whether and how ischaemic heart disease (IHD) or non-IHD aetiology may account for differential redox alterations is currently unclear. We assessed the relation between thiol redox state and lipid peroxidation, as a marker of oxidative stress, in patients with CHF of ischaemic or non-ischaemic origin.
Blood reduced glutathione, plasma total and reduced cysteine, cysteinylglycine, homocysteine, glutathione, plasma α-tocopherol, ascorbic acid, and free malondialdehyde were assessed in 43 CHF heart transplant candidates (24 IHD and 19 non-IHD) and 30 controls matched for age, gender and number of atherosclerotic risk factors.
Reduced cysteine was increased in CHF patients compared with controls. The highest levels were found in IHD versus non-IHD patients versus controls. Malondialdehyde levels were significantly higher in IHD patients than in controls, whereas antioxidant vitamins did not differ among the three groups.
Specific abnormalities in the thiol pattern are associated with heart failure aetiology in CHF patients. Our findings point to the possible role of reduced cysteine in the progression of chronic IHD to heart failure status, as an additional pro-oxidant stimulus for worsening oxidative stress.
aCNR Clinical Physiology Institute of Milan, Cardiology Department, Niguarda Ca' Granda Hospital, Milan, Italy
bCardiology Department, Niguarda Ca' Granda Hospital, Milan, Italy
cDepartment of Preclinical Sciences, LITA Vialba, University of Milan, Milan, Italy
Received 4 October, 2006
Revised 7 February, 2007
Accepted 12 February, 2007
Correspondence to Prof Oberdan Parodi, CNR Clinical Physiology Institute of Milan, Cardiology Department, Niguarda Ca' Granda Hospital, Piazza Ospedale Maggiore 3, 20162 Milan, Italy Tel: +39 02 6473407; fax: +39 02 66116990; e-mail: firstname.lastname@example.org