BACKGROUND: Secretoneurin (SN) is a neuropeptide with potential utility as a biomarker of cardiovascular episodes. The main effect of SN is mediated through its inhibition of calmodulin-dependent kinase II (CaMKII), which influences calcium handling. We aimed to associate the levels of SN in plasma with different causes of heart failure. METHODS: We prospectively enrolled consecutive patients with ischaemic (ICM) and dilated (DCM) cardiomyopathy from the outpatient heart failure clinic and healthy individuals. SN was analysed from venous blood by use of the ELISA method. SN plasma levels were compared in DCM, ICM and healthy individuals with non-parametric tests. RESULTS: A total of 53 patients (81.1% male, 18.9% female; mean age 67.9 ± 12.6 years) and 34 healthy individuals (38% male, 62% female) were included in the analysis. Plasma SN levels were significantly higher in the dilated cardiomyopathy (38.8 ± 27 pmol/L) as compared with the ischaemic cardiomyopathy (19.7 ± 22.6 pmol/L) group (P = 0.006). There was no significant difference between females vs. males (27.1 ± 23 vs. 25.5 ± 26.2 pmol/L, P = NS). Plasma SN levels allowed DCM and ICM to be differentiated with 88% sensitivity and 61% specificity (P = 0.007), the cut of value is 13.3 pmol/L. Plasma SN levels differed significantly between healthy volunteers and both ICM (P < 0.0001) and DCM (P = 0.049). Plasma SN levels did not differ according to age and were not associated with comorbidities, left ventricular ejection fraction, heart failure medication, troponin, creatinine, or natriuretic peptide plasma levels. CONCLUSION: Plasma secretoneurin levels differed significantly in DCM vs. ICM, being higher in the former. Based on plasma SN levels, discrimination between DCM and ICM might be possible. Healthy individuals produce higher SN plasma levels than stable HFrEF patients.
- Publikační typ
- časopisecké články MeSH
Koordinovaný postup provádění odběrů krve, preanalytického zpracování a uchovávání biologického materiálu v kteroukoli denní nebo noční dobu je důležité především u pacientů s prudce probíhajícím onemocněním, kdy zahájení léčby (např. výměnnou plazmaferézou) před provedením odběrů krve může ovlivnit výsledky laboratorních vyšetření a komplikovat další diferenciální diagnostiku. Do této skupiny řadíme jednoznačně i trombotické mikroangiopatie. V článku prezentujeme postup otestovaný v klinické praxi v podmínkách Fakultní nemocnice Ostrava. Ve druhém kroku byl postup představen a diskutován s experty z ostatních hematologických center. Výsledkem této diskuze bylo vytvoření univerzální žádanky o zpracování a archivaci vzorků krve, která může přispět ke standardizaci postupu v dalších zdravotnických zařízeních.
Coordinated blood collection, pre-analytical processing, and storage of biological material at any time of the day or night is particularly important in patients with rapidly progressive disease, where initiation of treatment (e. g., plasmapheresis) before blood collection may affect laboratory results and complicate further differential diagnosis. Thrombotic microangiopathies belong to this group of diseases. In this article, we present a procedure tested in clinical practice at the University Hospital Ostrava. Next, the procedure was presented and discussed with experts from other haematology centres. The result of this discussion was the creation of a universal request form for the processing and archiving of blood samples, which may contribute to the standardization of the procedure in other medical institutions.
