Publications by authors named "Aleksandra Antovic"

Article Synopsis
  • The study looks at how certain proteins in the blood are connected to blood clots in patients with severe COVID-19.
  • Researchers checked blood samples from 207 patients to see if there was a link between these proteins and a serious condition called pulmonary embolism (PE) that can happen with COVID-19.
  • They found that while some proteins were higher in patients, there wasn't a clear difference between those with PE and those without, so more research is needed to understand this better.
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In forensic DNA analysis, evidence sampling stands as a pivotal step setting the ground for the quality of the forensic profiling. The collection of touch DNA from objects, when guidelines are scarce or absent, is usually governed by ad hoc decisions based on the available case circumstances. In our laboratory, in the context of illicit drug-related crimes, similar objects are frequently encountered, offering an opportunity for the standardization of evidence treatment.

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Objective: Individuals positive for anti-cyclic-peptide-antibodies (anti-CCP) and musculoskeletal complaints (MSK-C) are at risk for developing rheumatoid arthritis (RA). In this study we aimed to investigate factors involved in arthritis progression.

Methods: Anti-CCP2-positive individuals with MSK-C referred to a rheumatologist were recruited.

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Benzodiazepines and their derivatives belong to a category of new psychoactive substances that have been introduced into the continually expanding illicit market. However, there is a notable absence of available pharmacological data for these substances. To gain a deeper understanding of their pharmacology, we employed the Monte Carlo optimization conformation-independent method as a tool for developing QSAR models.

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Objectives: To study circulating myeloperoxidase (MPO)-positive extracellular vesicles (MPOEVs) exposing citrullinated histone-3 (H3Cit), tissue factor (TF), and plasminogen (Plg) in association to thrombin generation in patients with anti-neutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV).

Methods: We have involved well-characterized patients with AAV together with population-based controls. Flow cytometry was used to assess the levels of MPOEVs in citrated plasma.

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Background: Some variations of the cerebral arterial circle (CAC) are associated with an increased risk for the development of various pathological conditions. This paper aimed to determine the prevalence of hypoplastic arteries of CAC and to emphasize the limited possibility of their visualization by computed tomography angiography (CTA).

Materials And Methods: The research was performed on 400 adult cadavers by macro- and microdissection of the cerebral arteries.

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Article Synopsis
  • The study examined the role of extracellular vesicles (EVs) in COVID-19 patients experiencing neurological symptoms, focusing on their association with coagulation activation.
  • It involved 19 COVID-19 patients and 23 healthy controls, employing global coagulation assays and flow cytometry to analyze EV levels in plasma and cerebrospinal fluid (CSF).
  • Key findings showed that COVID-19 patients had a procoagulant state and significantly increased levels of EVs from neutrophils and platelets, with a correlation to coagulation potential, and identified EVs in CSF potentially indicating blood-brain barrier damage.
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Article Synopsis
  • Acute hemorrhagic encephalomyelitis (AHEM) is a rare and severe condition characterized by inflammation and demyelination in the central nervous system, often linked to infections or vaccinations.
  • A case of a 53-year-old male with rheumatoid arthritis who developed fatal AHEM after receiving the COVID-19 vaccine is discussed, alongside complications such as thromboembolic disease and elevated antiphospholipid antibodies.
  • The report emphasizes the challenges of diagnosing AHEM in patients with existing health issues and the need to monitor potential adverse effects of COVID-19 vaccinations to better protect vulnerable populations.
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  • The study evaluated thrombin generation and fibrin formation in systemic sclerosis patients, specifically focusing on those with a history of digital ulcers (DUs).
  • Significant differences in thrombin levels and clot lysis times were found between patients with DUs and healthy controls, indicating a correlation with disease severity.
  • Over a follow-up of 1.5 years, prolonged clot lysis and other factors were identified as predictors for the development of new DUs, suggesting that impaired fibrinolysis contributes to complications in systemic sclerosis.
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Pre-eclampsia (P-EC) is associated with systemic inflammation, endothelial dysfunction and hypercoagulability. The role of extracellular vesicles (EVs) in coagulation disturbances affecting the development and severity of P-EC remains elusive. We aimed to evaluate the concentration of EVs expressing phosphatidylserine (PS) and specific markers in relation to the thrombin and fibrin formation as well as fibrin clot properties, in pregnant women with P-EC in comparison to healthy pregnant women of similar gestational age.

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This study sought to identify different subpopulations of extracellular vesicles (EVs) in plasma from female patients with established rheumatoid arthritis (RA) in relation to the activation of coagulation and fibrin formation in these patients. Forty women were included in the study, 20 patients and 20 age-matched healthy controls. The mean disease duration in patients was 13.

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The pathogenesis of the antiphospholipid syndrome (APS) is complex and involves the persistent presence of antiphospholipid antibodies (aPL) in the bloodstream causing a prothrombotic condition. aPL induce excessive activation of the endothelium, monocytes, and platelets in consort with aberrations in hemostasis/clotting, fibrinolytic system, and complement activation. Impaired fibrinolysis has been found in APS patients with thrombotic as well as obstetric manifestations.

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Although oxidative stress is considered to be one of the key pathogenic factors in rheumatoid arthritis (RA), there is insufficient knowledge regarding the impact of menopause on redox status in this population. Thus, this study is aimed at assessing the influence of menopause within healthy women and within RA patients as well as the impact of RA in premenopausal and postmenopausal women on redox status, with special reference to bone mineral density (BMD). A total of 90 women were included in the study, 42 with RA and 48 age-matched healthy controls.

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Article Synopsis
  • Low levels of C4b-binding protein (C4BPt) were found in patients with antiphospholipid antibodies (aPLs) and those undergoing warfarin treatment.
  • The study examined the relationship between aPL, C4BPt levels, and various patient groups, including those with systemic lupus erythematosus (SLE), while analyzing the effects of anticoagulation on C4BPt and complement activation.
  • Findings revealed a 20% reduction in C4BPt levels in aPL++ patients, with warfarin contributing significantly to this decrease; implications suggest that lower C4BPt may impair the body's ability to regulate complement activation in these patients.
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Objectives: We investigated the incidence and potential underlying risk factors of venous thromboembolism (VTE) in patients with AAV. We assessed haemostatic disturbances and factors that might contribute to the risk of development of VTE.

Methods: ANCA-positive AAV patients ( = 187) were included.

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The aim of this research is to perform an analysis of the epineurial and endoneurial blood vessels in relation to aging. The research is conducted on samples of the human sciatic nerve of 12 case (age from 27 to 89). The histological sections are stained by streptavidin-biotin method of detecting the presence of Type IV collagen.

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 For acute venous thromboembolism (VTE), a biomarker with higher specificity than D-dimer would be of great clinical use. Thrombin generation and overall hemostatic potential (OHP) reflect the hemostatic balance by globally assessing multiple coagulation factors and inhibitors. These tests discriminate between healthy controls and patients with a prothrombotic tendency but have yet to be established as clinical biomarkers of VTE.

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Development of inhibitors to factor VIII (FVIII) occurs in approximately 30% of severe hemophilia A (HA) patients. These patients are treated with bypassing agents (activated prothrombin complex concentrate [aPCC] and recombinant activated FVII-rFVIIa). Recently, a bispecific FIX/FIXa- and FX/FXa-directed antibody (emicizumab) has been approved for the treatment of HA patients with inhibitors.

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Circulating microparticles (MPs) are procoagulant due to the surface containing phosphatidylserine (PS), which facilitates coagulation. We investigated if MPs improve hemostasis in HA plasma models. MPs isolated from pooled normal human plasma were added to severe, moderate and mild HA plasma models (0%, 2.

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Introduction: Haemostatic balance shifted towards hypercoagulability in normal pregnancy is even more pronounced in pre-eclampsia (P-EC). The aim of this study was to analyse haemostatic disturbances and fibrin clot properties in women with pre-eclampsia and to investigate their association with maternal and foetal outcomes.

Methods: Forty-six pregnant women diagnosed with pre-eclampsia were included in the study, with blood sampling done on the morning following admission to hospital, as well as after delivery (mean duration 4.

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: The study was aimed to evaluate the effects of two standard doses of rivaroxaban and dabigatran on global hemostatic assays in patients with atrial fibrillation. The study included 52 patients treated with rivaroxaban (15/20 mg), 50 on dabigatran (110/150 mg) and 20 healthy individuals. Platelet-poor plasma was used for determination of three global hemostatic assays, namely endogenous thrombin potential (ETP), calibrated automated thrombogram (CAT) and overall hemostasis potential (OHP).

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Background: Thrombosis is a major global disease burden with almost 60% of cases related to underlying heredity and most cases still idiopathic. Synonymous single nucleotide polymorphisms (sSNPs) are considered silent and phenotypically neutral. Our previous study revealed a novel synonymous FII c.

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Article Synopsis
  • A rare case of a pancreatic polypeptide-secreting tumor (PPoma) was found during an autopsy of a 68-year-old man with multiple endocrine neoplasm type 1 (MEN1) after his sudden death.
  • PPomas are uncommon, comprising less than 2% of pancreatic tumors, and are generally non-functional, causing symptoms primarily from pressing on nearby tissues.
  • The tumor was characterized by a glandular structure and strong pancreatic polypeptide activity, and its location may have led to the obstruction of key pancreatic and bile ducts, potentially causing acute hemorrhagic pancreatitis.
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