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Transcriptional Activity of Genes Encoding Interferon γ (IFNγ) and its Receptor Assessed in Peripheral Blood Mononuclear Cells in Patients with Cardiac Syndrome X

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Abstract

Background

Cardiac syndrome X is typically characterized by effort induced anginal pain with ST segment depression suggestive of myocardial ischemia and normal coronary arteries at angiography. The possible mechanism that may participate in the pathology of CSX is a microvascular dysfunction related to inflammatory process affecting endothelium.

Interferon γ (IFN-γ) is an important cytokine in inflammatory reaction. It acts through its specific receptor composed of 2 subunits

IFN-γ R1 (ligand binding) and R2 (signal transduction). The expression and proportion of these subunits influences IFN-γ activity. The aim of the study was to assess the gene expression of IFN-γ and its receptors in peripheral blood mononuclear cells (PBMC) from patients with syndrome X.

Methods

The study was carried out in 36 patients aged 44–77 (average 57 years old) with cardiac syndrome X and 23 sex- and age-matched healthy subjects (control group). To evaluate gene expression of IFNγ and its receptor total mRNA was extracted from peripheral blood mononuclear cells (PBMC) and the number of mRNA copies were assessed by quantitive reverse transcriptase polymerase chain reaction (QRT-PCR).

Results

We have not observed statistically significant differences in INFγ gene expression between studied group and control. Genes encoding IFNγ receptor subunits showed higher expression in PBMCs from patients with cardiac syndrome X vs control subjects (IFNγR1, 97,244 ± 26,956 c/μg vs 12,120 ± 2,940 c/μg, p < 0.005, respectively and IFNγR2, 129,153 ± 36,883 c/μg vs 16,445 ± 2,923 c/μg, p < 0.005, respectively).

Conclusion

Variation in transcriptional activity of genes encoding INF-γ receptor subunits may affect function of microvasculature and thereby participate in the pathology of cardiac syndrome X.

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Authors and Affiliations

  1. Department of Cardiology, Medical University of Silesia, Ziolowa 47, 40-635, Katowice, Poland

    Jozefa Dabek, Andrzej Kulach, Daniel Jakubowski & Zbigniew Gasior

  2. Department of Molecular Biology and Medical Genetics, Medical University of Silesia, ul. Narcyzów 1, Sosnowiec, Poland

    Tadeusz Wilczok & Urszula Mazurek

Authors
  1. Jozefa Dabek
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  2. Andrzej Kulach
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  3. Tadeusz Wilczok
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  4. Urszula Mazurek
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  5. Daniel Jakubowski
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  6. Zbigniew Gasior
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Correspondence to Andrzej Kulach.

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Dabek, J., Kulach, A., Wilczok, T. et al. Transcriptional Activity of Genes Encoding Interferon γ (IFNγ) and its Receptor Assessed in Peripheral Blood Mononuclear Cells in Patients with Cardiac Syndrome X. Inflammation 30, 125–129 (2007). https://doi.org/10.1007/s10753-007-9028-0

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  • DOI: https://doi.org/10.1007/s10753-007-9028-0

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