Proinflammatory cytokine levels in patients with diastolic heart failure.
BACKGROUND
The role of cytokines in the pathogenesis of systolic heart failure (HF) has been well established whereas in diastolic HF it remains uncertain.


OBJECTIVE
To define levels of Tumor Necrosis Factor-a (TNFa) and Interleukin-6 (IL-6) in patients with diastolic HF and to reveal their association with functional class and types of left ventricular (LV) diastolic dysfunction.


METHODS
We examined 26 patients with diastolic HF. The control group consisted of 10 healthy persons. Commonly used echocardiographic parameters of systolic and diastolic function of the LV, thickness of the interventricular septum (IVS), posterior LV wall thickness (PWLV), end-diastolic size of the LV (EDSLV) and left atrial (LA) volume were assessed. Serum levels of TNFa and IL-6 were measured with highly sensitive enzyme-linked immunosorbent assay.


RESULTS
The TNFa and IL-6 levels were significantly higher in the group with diastolic HF than in the control group. TNFa and IL-6 levels in groups with impaired LV relaxation and restriction/pseudonormalisation were significantly higher than in the control group. TNFa level was significantly higher in the restriction/pseudonormalisation group than in the group with impaired relaxation, whereas the IL-6 level was similar. The TNFa level was significantly higher in the group with NYHA class III-IV in comparison to the group with NYHA class II. The IL-6 level in these groups was similar. Of the echocardiographic parameters, only LA volume significantly correlated with the TNF+/- level. No relationship between the IL-6 level and echocardiographic parameters was found.


CONCLUSIONS
In diastolic HF, serum levels of TNFa and IL-6 are elevated. The magnitude of TNF+/- elevation is associated with the severity of HF, assessed by NYHA classification, LV diastolic dysfunction level or LA volume.
Amosova
Ekaterina Nikolaevna
EN
National Medical University, Kiev, Ukraine.
Shpak
Yaroslav Vladimirovich
YV
Nedozhdij
Anna Vasiljevna
AV
Produsevich
Lidija Vladimirovna
LV
D016022:Case-Control Studies; D003971:Diastole; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006333:Heart Failure / Q000097:blood* / Q000503:physiopathology; D006801:Humans; D015850:Interleukin-6 / Q000097:blood*; D008297:Male; D008875:Middle Aged; D012720:Severity of Illness Index; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*; D018487:Ventricular Dysfunction, Left / Q000097:blood*
D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha