Expression of Toll-like receptor 4 and tumor necrosis factor-α on peripheral-blood mononuclear cells and their correlation with myocardial perfusion in patients with diabetic cardiomyopathy / 中华心血管病杂志
Chinese Journal of Cardiology
; (12): 503-507, 2011.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-272211
Biblioteca responsável:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To explore the expression of Toll-like receptor 4 (TLR4) and tumor necrosis factor-α (TNF-α) on peripheral-blood mononuclear cells (PBMCs) and their correlation with myocardial perfusion in patients with diabetic cardiomyopathy (DCM).</p><p><b>METHODS</b>The expression of TLR4 and TNF-α mRNA on PBMCs were examined by SYBR Green I real-time quantitative reverse transcription polymerase chain reaction (RT-PCR), the levels of TLR4 and TNF-α were examined by flow cytometric analysis and enzyme-linked immuno sorbent assay (ELISA) on DCM group (n = 20), Type 2 diabetic group (n = 22) and control group (n = 20). Myocardial perfusion was visualized by single-photon emission computed tomography (SPECT).</p><p><b>RESULTS</b>The expressions of TLR4 and TNF-α mRNA/protein on PBMCs in DCM group were significantly higher than in Type 2 diabetic group, and higher in Type 2 diabetic group than in control groups (P < 0.05); summed stress score (SSS) and summed rest score (SRS) of myocardial perfusion in DCM group were significantly higher than in Type 2 diabetic group, and higher in Type 2 diabetic group than in control groups (P < 0.01). The expression of TLR4, TNF-α was positively correlated with SSS (r = 0.75, P < 0.05; r = 0.931, P < 0.005) and SRS (r = 0.78, P < 0.005; r = 0.789, P < 0.005). SSS and SRS in DCM group were also positively correlated with soluble vascular cell adhesion molecule-1 (sVCAM-1) (r = 0.728, P < 0.005; r = 0.738, P < 0.005) but there was no correlation between SSS and SRS and brain natriuretic peptide, LVEF, E/A, HbA1c, FBG, FIN and LDL-C (P > 0.05).</p><p><b>CONCLUSION</b>The increased expression of TLR4 and TNF-α mRNA/protein on PBMCs and increased serum sVCAM-1 is linked with reduced myocardial perfusion in DCM group. TLR4 and TNF-α may thus play a critical role in the myocardial perfusion inflammation injury in these patients.</p>
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Sangue
/
Leucócitos Mononucleares
/
Estudos de Casos e Controles
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Fator de Necrose Tumoral alfa
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Receptor 4 Toll-Like
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Cardiomiopatias Diabéticas
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Metabolismo
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Miocárdio
Tipo de estudo:
Estudo observacional
Limite:
Feminino
/
Humanos
/
Masculino
Idioma:
Chinês
Revista:
Chinese Journal of Cardiology
Ano de publicação:
2011
Tipo de documento:
Artigo