Clin Res Cardiol (2022). https://doi.org/10.1007/s00392-022-02002-5 |
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Serum levels of the endoplasmic-reticulum-stress chaperone GRP78 identify patients with coronary artery disease and predict mortality | ||
M. Al Zaidi1, E. Repges1, S. Sommer-Weisel1, F. Jansen1, S. Zimmer1, V. Tiyerili2, G. Nickenig1, A. Aksoy1 | ||
1Medizinische Klinik und Poliklinik II, Universitätsklinikum Bonn, Bonn; 2Klinik für Innere Medizin I, St.-Johannes-Hospital Dortmund, Dortmund; | ||
Introduction: Here, we investigated the significance of serum GRP78 in patients undergoing coronary angiography for suspected CAD.
GRP78 levels were increased in patients with CAD when compared to patients without CAD (2640 ng/ml [95% CI: 2415-2864] vs. 2178 ng/ml [95% CI: 1893-2463], p = 0.013, Fig A). Interestingly, GRP78 levels were lower in patients with ACS than in patients with CCS (2284 ng/ml [95% CI: 1944-2642] vs. 2822 [95% CI: 2531-3113], p = 0.018, Fig B). There was no difference between NSTEMI and STEMI patients. To further elucidate these findings, we analyzed available proteomics of patients with hypertrophic cardiomyopathy undergoing septal ablation as a model for a planned myocardial infarction (PMI)1. Coronary sinus blood samples drawn 10 and 60 min after PMI showed a consistent downregulation of GRP78 levels when compared to baseline concentration (60 min: 59% of baseline). Finally, we assessed prognostic relevance of GRP78 in patients with CAD. Intriguingly, increased GRP78 levels were associated with lower occurrence of the clinical endpoint of one-year mortality (5.3% vs. 10.6 % vs. p = 0.016). Increased GRP78 levels were associated with reduced one-year mortality in both continuous (HR: 0.48 [95% CI: 0.25 - 0.92]) and categorial analyses stratified by median GRP78 (HR 0.54 [0.28 – 0.98]). After adjusting for age, sex, BMI, diabetes, CKD, and presentation as ACS, GRP78 remained an independent predictor of one-year mortality (HR: 0.51 [0.26 – 0.96], p = 0.039).
1: doi: 10.1038/nbt.1899. |
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https://dgk.org/kongress_programme/jt2022/aV28.html |