Aminothiol redox alterations in patients with chronic heart failure of ischaemic or non-ischaemic origin.
OBJECTIVE
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.


METHODS
Blood reduced glutathione, plasma total and reduced cysteine, cysteinylglycine, homocysteine, glutathione, plasma alpha-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.


RESULTS
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.


CONCLUSIONS
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.
Campolo
Jonica
J
CNR Clinical Physiology Institute of Milan, Cardiology Department, Niguarda Ca Granda Hospital, Milan, Italy.
Caruso
Raffaele
R
De Maria
Renata
R
Parolini
Marina
M
Oliva
Fabrizio
F
Roubina
Elena
E
Cighetti
Giuliana
G
Frigerio
Maria
M
Vitali
Ettore
E
Parodi
Oberdan
O
D000368:Aged; D001205:Ascorbic Acid / Q000097:blood; D015415:Biomarkers / Q000097:blood; D016022:Case-Control Studies; D002908:Chronic Disease; D003545:Cysteine / Q000097:blood; D004151:Dipeptides / Q000097:blood; D018450:Disease Progression; D005260:Female; D005978:Glutathione / Q000097:blood; D006333:Heart Failure / Q000097:blood* / Q000209:etiology; D006710:Homocysteine / Q000097:blood; D006801:Humans; D015227:Lipid Peroxidation; D008297:Male; D008315:Malondialdehyde / Q000097:blood; D008875:Middle Aged; D017202:Myocardial Ischemia / Q000097:blood / Q000150:complications*; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D012107:Research Design; D013438:Sulfhydryl Compounds / Q000097:blood*; D024502:alpha-Tocopherol / Q000097:blood
D015415:Biomarkers; D004151:Dipeptides; D013438:Sulfhydryl Compounds; D006710:Homocysteine; C028505:cysteinylglycine; D008315:Malondialdehyde; D005978:Glutathione; D024502:alpha-Tocopherol; D003545:Cysteine; D001205:Ascorbic Acid