Heat shock proteins in the assessment of the course and prognosis of heart failure with preserved ejection fraction

Aim. To analyze the relationship between the concentrations of circulating heat shock proteins (HSP): HSP27, HSP70 and cardiovascular HSP (cvHSP) with the course of heart failure with preserved ejection fraction (HFpEF) and the outcomes of acute decompensated HFpEF (ADHFpEF). Material and methods. A total of 120 patients with a confirmed diagnosis of HFpEF aged 50 to 90 years and acute decompensated HFpEF at the time of blood sampling, as well as 20 patients with HFpEF without clinical manifestations of ADHFpEF were examined. Before treatment, blood was collected from patients and serum was obtained with subsequent storage at -80 0 C for biomarker testing by the enzyme immunoassay (AssayPro, USA and Cloud-Clone, USCN) on a Thermo Multiscan FC microplate photometer (USA). Fatal outcomes were monitored in patients in the interval from 6 months to 1,5 years. Results. The median serum levels of HSP27, HSP70 and cvHSP are significantly higher in patients with decompensated than with compensated HFpEF. Elevated baseline levels of HSP70 (>3,5 ng/ml) and cvHSP (>1321 pg/ml) in patients with ADHFpEF are associated with an unfavorable survival prognosis. For HSP27, no significant differences were found in the survival analysis. Conclusion. An association was found between serum concentrations of HSP70 and cvHSP with an unfavorable survival prognosis in patients with ADHFpEF, which allows them to be considered as potential prognostic markers of this disease.