Related Experiment Videos
Tumour necrosis factor-alpha in diastolic dysfunction.
Mustafa Kilickap1, Adalet Gurlek, Rabih Dandachi
1Cardiology Department, Ankara University School of Medicine, Ankara, Turkey. mkilickap@yahoo.com
Acta Cardiologica
|November 9, 2004
Summary
Tumor necrosis factor-alpha (TNF-alpha) did not increase in hypertensive patients with abnormal relaxation. Further studies are needed to clarify the relationship between TNF-alpha and diastolic dysfunction.
Area of Science:
- Cardiology
- Molecular Biology
- Physiology
Background:
- Active relaxation is regulated by sarcoplasmic reticulum calcium ATPase (SERCA) and phospholamban.
- Tumor necrosis factor-alpha (TNF-alpha) downregulates SERCA and phospholamban, potentially impacting relaxation.
- The in vivo relationship between TNF-alpha and diastolic dysfunction requires further investigation.
Purpose of the Study:
- To investigate if circulating TNF-alpha levels are elevated in patients with abnormal cardiac relaxation.
- To explore the potential role of TNF-alpha in diastolic dysfunction.
Main Methods:
- Echocardiography assessed mitral inflow velocities, E-wave deceleration time, and isovolemic relaxation time in 40 hypertensive patients.
- Patients were categorized into two groups: abnormal relaxation (n=20) and normal diastolic function (n=20).
- Tumor necrosis factor-alpha (TNF-alpha) levels were quantified using ELISA.
Main Results:
- No significant differences in cardiac structure, function, or medication were observed between groups.
- Patients with relaxation abnormalities were older than those with normal diastolic function (p < 0.001).
- Circulating TNF-alpha levels were similar in both groups (p = 0.089).
Conclusions:
- This preliminary study found no increase in TNF-alpha levels in patients with abnormal relaxation.
- A potential link between TNF-alpha and diastolic dysfunction warrants further research with larger cohorts and broader diastolic dysfunction spectrums.