Abstract:
BACKGROUND:Recent experimental and clinical data indicate that abnormal central and peripheral immune reactions contribute to the progression of chronic heart failure, and that immunomodulation may be an important therapeutic approach in this syndrome. Aims We sought to study the effects of growth hormone (GH) administration on circulating pro-inflammatory/anti-inflammatory cytokine balance, and to investigate whether these GH-induced immunomodulatory effects are associated with the improvement of left ventricular (LV) contractile performance in idiopathic dilated cardiomyopathy (DCM) patients. METHODS:Plasma pro-inflammatory cytokines tumour necrosis factor-alpha (TNF-alpha), interleukin-6 (IL-6), granulocyte-macrophage colony-stimulating factor (GM-CSF) and its soluble receptor (sGM-CSFR), chemotactic cytokine macrophage chemoattractant protein-1 (MCP-1), soluble adhesion molecules intercellular adhesion molecule-1 (sICAM-1) and vascular cell adhesion molecule-1 (sVCAM-1), and, finally, anti-inflammatory cytokines interleukin-10 (IL-10) and transforming growth factor-beta2 (TGF-beta2) were measured (ELISA method) in 12 patients with DCM (NYHA class III; LV ejection fraction: 23.6+/-1.7%) before and after a 3-month subcutaneous administration of GH 4IU every other day (randomized crossover design). Peak oxygen uptake (VO2 max), LV dimensions, LV mass index, end-systolic wall stress (ESWS), mean velocity of circumferential fibre shortening (Vcfc), and contractile reserve (change of ratio Vcfc/ESWS after dobutamine administration) were also determined at the same period. RESULTS:Treatment with GH produced a significant reduction in plasma TNF-alpha (7.8+/-1.1 vs 5.5+/-0.9pg/ml, P=0.013), IL-6 (5.7+/-0.5 vs 4.7+/-0.4pg/ml, P=0.043), GM-CSF (27.3+/-1.7 vs 23.3+/-1.8pg/ml, P=0.042), sGM-CSFR (4.0+/-0.4 vs 3.2+/-0.4ng/ml, P=0.039), MCP-1 (199+/-5 vs 184+/-6pg/ml, P=0.048), sICAM-1 (324+/-34 vs 274+/-27ng/ml, P=0.008) and sVCAM-1 (1238+/-89 vs 1043+/-77ng/ml, P=0.002) in DCM patients. A significant increase in ratios IL-10/TNF-alpha (1.9+/-0.3 vs 3.5+/-0.9, P=0.049), IL-10/IL-6(2.6+/-0.6 vs 3.2+/-0.5, P=0.044) and TGF-beta2/TNF-alpha (3.1+/-0.6 vs 4.4+/-0.6, P=0.05) was alsofound with GH therapy. A significant reduction in ESWS (841+/-62 vs 634+/-48gr/cm(2), P=0.0026) and LV end-systolic volume index (LVESVI, 128+/-12 vs 102+/-12ml, P=0.035) as well as a significant increase in posterior wall thickness (PWTH, 9.2+/-0.5 vs 10.3+/-0.6mm, P=0.034), contractile reserve (0.00029+/-0.0001 vs 0.00054+/-0.0001circ*cm(2)/gr*s, P=0.00028) and VO2max (15.3+/-0.7 vs 17.1+/-0.9ml/kg/min, P=0.002) were observed after GH administration. Good correlations were found between GH-induced increase in contractile reserve and the increases in VO2max (r=0.63, P=0.028), IL-10/TNF-alpha (r=0.69, P=0.011) and TGF-beta2/TNF-alpha (r=0.58, P=0.046) ratios, as well as the reduction in plasma TNF-alpha levels (r=-0.86, P=0.0004). CONCLUSIONS:GH administration modulates beneficially circulating cytokine network and soluble adhesion molecules in patients with DCM, whilst enhancing contractile reserve and diminishing LV volumes. These GH-induced anti-inflammatory effects may be associated with the improvement in LV contractile performance and exercise capacity as well as with the reverse of LV remodelling of patients with DCM.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Adamopoulos S,Parissis JT,Paraskevaidis I,Karatzas D,Livanis E,Georgiadis M,Karavolias G,Mitropoulos D,Degiannis D,Kremastinos DTdoi
10.1016/s0195-668x(03)00480-9subject
Has Abstractpub_date
2003-12-01 00:00:00pages
2186-96issue
24eissn
0195-668Xissn
1522-9645pii
S0195668X03004809journal_volume
24pub_type
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