title: Pattern of circulating endothelial-derived microparticles among chronic heart failure patients with dysmetabolic comorbidities: The impact of subclinical hypothyroidism.
abstract: The study aim was to evaluate the impact of dysmetabolic comorbidities including subclinical hypothyroidism (SH) on pattern of circulating endothelial-derived microparticles (EMPs) in chronic heart failure (CHF) patients.
  
  
  METHODS
  It was retrospectively involved a cohort of 388 patients with CHF. Fifty three CHF subjects had SH and 335 patients were free from thyroid dysfunction. Circulating levels of NT-pro brain natriuretic peptide (NT-pro-BNP), high-sensitivity C-reactive protein (hs-CRP), thyroid stimulating hormone (TSH), total and free thyroxine (T4) and triiodothyronine (T3) EMPs were measured at baseline. SH was defined per contemporary clinical guideline as state associated with elevated level of serum TSH>10 μU/L and basal normal free T3 and T4 concentration.
  
  
  RESULTS
  Circulating CD31+/annexin V+ EMPs were higher in SH patients compared with none SH subjects. In contrast, activated CD62E+ EMP numbers were not significantly different between both patient cohorts. Using C-statistics for Models with TSH, New York Heart Association (NYHA) class, dyslipidemia, and circulating biomarkers (hs-CRP, NT-proBNP, serum uric acid) as Continuous Variables we found that adding of NYHA class alone, NT-proBNP alone or their combination to the based model (TSH) improved the relative integrated discrimination improvement (IDI) for increased CD31+/annexin V+ to CD62E+ ratio by 4.9%; 9.2% and 9.6% respectively. NT-proBNP improves significantly predictive model based on TSH for increased CD31+/annexin V+ to CD62E+ ratio. Among patient study population for category-free net reclassification improvement (NRI), 4% of events (P=0.026) and 6% of non-events (P=0.012) were correctly reclassified by the addition of circulating NT-proBNP to the base model (TSH) for Increased CD31+/annexin V+ to CD62E+ ratio. Therefore, 4% of events (P=0.028) and 5% of non-events (P=0.014) were correctly reclassified using category-free NRI for increased CD31+/annexin V+ to CD62E+ ratio.
  
  
  CONCLUSIONS
  We found that SH state in CHF patients associates with impaired pattern of circulating EMPs with predominantly increased number of apoptotic-derived microparticles.
authors: Cardiology Unit, Internal Medicine Department, State Medical University, 26, Mayakovsky av., Zaporozhye, UA-69035, Ukraine. Electronic address: dr_berezin@mail.ru.
authors: Alexander E
authors: AE
authors: Berezin
authors: Clinical Pharmacology Department, State Medical University, Zaporozhye, Ukraine.
authors: Alexander A
authors: AA
authors: Kremzer
authors: Pathology Department, State Medical University, Zaporozhye, Ukraine.
authors: Yulia V
authors: YV
authors: Martovitskaya
authors: Clinical Pharmacology Department, State Medical University, Zaporozhye, Ukraine.
authors: Tatyana A
authors: TA
authors: Samura
authors: Private Medical Center "Vita-center", Zaporozhye, Ukraine.
authors: Tatyana A
authors: TA
authors: Berezina
mesh_terms: D000368:Aged; D015415:Biomarkers / Q000097:blood; D055252:Cell-Derived Microparticles / Q000378:metabolism*; D002908:Chronic Disease; D000072226:Computed Tomography Angiography; D003331:Coronary Vessels / Q000000981:diagnostic imaging; D005260:Female; D005919:Glomerular Filtration Rate; D006333:Heart Failure / Q000150:complications* / Q000000981:diagnostic imaging / Q000378:metabolism; D006801:Humans; D007037:Hypothyroidism / Q000150:complications* / Q000000981:diagnostic imaging / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D012189:Retrospective Studies
chemical_list: D015415:Biomarkers
keywords: Chronic heart failure; Dysmetabolic comorbidities; Endothelial-derived microparticles; Subclinical hypothyroidism