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Dunjic Manevski S, Cumbo M, Pruner I, Gvozdenov M, Tomic B, Taxiarchis A, Antovic J, Djordjevic V. Effect of prothrombin Belgrade mutation, causing antithrombin resistance, on fibrin clot properties. Int J Lab Hematol 2024; 46:329-335. [PMID: 37918971 DOI: 10.1111/ijlh.14195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 10/14/2023] [Indexed: 11/04/2023]
Abstract
INTRODUCTION Prothrombin Belgrade mutation is the result of the c.1787G>A substitution in the prothrombin gene. It is located in the antithrombin and sodium binding site and leads to impaired inactivation of thrombin by antithrombin, resulting in antithrombin resistance and thrombotic disorders. However, it negatively affects sodium binding and may have hypocoagulant effects. Considering that prothrombin Belgrade mutation mechanism is still not fully elucidated and that sodium binding is important for thrombin affinity towards fibrinogen, our aim was to determine whether this mutation affects fibrin clot formation and lysis. METHODS Using HEK293T cell line, recombinant wild type and mutated prothrombin were generated by transient transfection. Samples that correspond to plasma of a non-carrier, heterozygous and homozygous carriers were reconstituted using prothrombin deficient plasma and recombinant proteins. Reconstituted samples were used in OHP assay (Overall Hemostasis Potential) to determine kinetic profiles of coagulation and fibrinolysis. Clot turbidity assay was performed to observe kinetics of clot formation and lysis more closely. Fibrin clots formed in reconstituted plasma samples were analyzed by confocal microscopy to determine density of fibrin network. Fibrin clots were additionally observed using electron microscopy to determine thickness of individual fibrin fibers. RESULTS No significant difference found in OHP, OCP, OFP, and fibrin network density between wild type, heterozygous, and homozygous carrier reconstituted plasma samples. There were significant differences between samples for slope and slope time parameters in kinetic profiles and fibrin fiber thickness. CONCLUSIONS Results indicate that prothrombin Belgrade mutation has no significant impact on fibrinolysis, however it may affect kinetics of clot formation and its architecture.
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Affiliation(s)
- Sofija Dunjic Manevski
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Marija Cumbo
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Iva Pruner
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
- Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Maja Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | | | - Jovan Antovic
- Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
- Clinical Chemistry, Karolinska University Hospital, Stockholm, Sweden
| | - Valentina Djordjevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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Kovac M, Balint MT, Milenkovic M, Basaric D, Tomic B, Balint B, Ignjatovic V. Assessment of Factor VIII Activity and D-Dimer Levels in the Post-COVID Period. Hamostaseologie 2024. [PMID: 38428838 DOI: 10.1055/a-2238-4744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024] Open
Abstract
Changes in the hemostatic system during COVID infection lead to hypercoagulability. Numerous studies have evaluated hemostatic abnormalities in COVID patients during acute infection, in the period of hospitalization. However, the hemostatic status following hospital discharge has not been sufficiently assessed. Considering the importance of FVIII and D-dimer levels as markers for the assessment of thrombosis, our study aimed to evaluate changes in these markers, as well as the influence of patient's age and clinical presentation of COVID infection on those hemostatic markers in the post-COVID phase. This prospective study (July 2020 to December 2022) included 115 COVID patients, 68 (59%) with asymptomatic/mild and 47 (41%) with moderate/severe clinical presentation. Patient follow-up included laboratory evaluation of FVIII and D-dimer levels at 1, 3, and 6 months following the COVID infection. Three months after the COVID infection, elevated FVIII was recorded in 44% of younger versus 65% of older individuals, p = 0.05, respectively, and 30 versus 57% (p = 0.008) 6 months post-COVID infection. With a focus on clinical presentation, a higher number of patients with moderate/severe COVID had elevated FVIII activity, but a statistically significant difference was observed only for the 6 months (32% mild vs. 53% moderate/severe, p = 0.041) post-infection time point. Following a COVID infection, an increase in FVIII activity suggests a continued hypercoagulable state in the post-COVID period and correlates with elevated D-dimer levels. This increase in FVIII is more pronounced in patients with moderate/severe clinical picture and those patients older than 50 years.
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Affiliation(s)
- Mirjana Kovac
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- Department of Hemostasis, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Milena Todorovic Balint
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- Clinic for hematology, University Clinical Centre of Serbia, Belgrade, Serbia
| | - Marija Milenkovic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- Emergency Centre, University Clinical Centre of Serbia, Belgrade, Serbia
| | - Dusica Basaric
- Department of Hemostasis, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Bela Balint
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- Faculty of Medicine of the Military Medical Academy, University of Defense, Belgrade, Serbia
| | - Vera Ignjatovic
- Johns Hopkins All Children's Institute for Clinical and Translational Research, United States
- Johns Hopkins University School of Medicine, St. Petersburg, Florida, United States
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Basaric D, Saracevic M, Bosnic V, Vlatkovic A, Tomic B, Kovac M. Factor VIII Activity in Relation to the Type of Thrombosis and Patient's Risk Factors for Thrombosis, Age, and Comorbidity. Eurasian J Med 2023; 55:9-13. [PMID: 36861859 PMCID: PMC10081059 DOI: 10.5152/eurasianjmed.2023.22072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
OBJECTIVE Elevated factor VIII has been shown to be an independent risk factor for deep venous thrombosis and pulmonary embolism. It has been suggested that increased factor VIII levels by itself is insufficient to cause thrombosis; however, increased factor VIII with other risk factors could increase the risk of thrombosis. The aim of the study was to evaluate the factor VIII level with regard to the type of thrombosis and patient's risk factors such as age or comorbidity. MATERIALS AND METHODS In total, 441 patients who were referred for thrombophilia testing from the period of January 2010 to December 2020 were included in the study. The patients who developed the first thrombosis before the age of 50 were eligible for the study. The patients' data that were used in statistical analyses were collected from our thrombophilia register. RESULTS The number of the subjects with increased factor VIII over 1.5 IU/mL is equal regardless of the thrombosis type. Factor VIII activity already begins to increase over 40 years old and reaches the mean values of 1.45 IU/mL close to the cut-off (1.5 IU/mL), showing a statistically significant difference compared to those under 40, P = .001. Comorbidities other than thyroid disease or malignancy had no influence on the increase of factor VIII. In the mentioned conditions, the average factor VIII of 1.82 (0.79) and 1.65 (0.43) was obtained, respectively. CONCLUSION Factor VIII activity is significantly affected by age. Thrombosis type and comorbid diseases other than thyroid disease and malignancy had no effect on factor VIII.
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Affiliation(s)
- Dusica Basaric
- Blood Transfusion Institute of Serbia, Hemostasis Department, Serbia, Belgrade
| | - Marko Saracevic
- Blood Transfusion Institute of Serbia, Hemostasis Department, Serbia, Belgrade
| | - Vesna Bosnic
- Blood Transfusion Institute of Serbia, Hemostasis Department, Serbia, Belgrade
| | - Anka Vlatkovic
- Blood Transfusion Institute of Serbia, Hemostasis Department, Serbia, Belgrade
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Belgrade
| | - Mirjana Kovac
- Blood Transfusion Institute of Serbia, Hemostasis Department, Serbia, Belgrade; Faculty of Medicine, University of Belgrade, Serbia, Belgrade
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Kovac M, Mitic G, Milenkovic M, Basaric D, Tomic B, Markovic O, Zdravkovic M, Ignjatovic V. Thrombosis risk assessment in patients with congenital thrombophilia during COVID - 19 infection. Thromb Res 2022; 218:151-156. [PMID: 36054979 PMCID: PMC9392558 DOI: 10.1016/j.thromres.2022.08.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 08/10/2022] [Accepted: 08/19/2022] [Indexed: 11/17/2022]
Abstract
Background Coagulation dysfunction represents a serious complication in patients during the COVID-19 infection, while fulminant thrombotic complications emerge as critical issues in individuals with severe COVID-19. In addition to a severe clinical presentation, comorbidities and age significantly contribute to the development of thrombotic complications in this disease. However, there is very little data on association of congenital thrombophilia and thrombotic events in the setting of COVID-19. Our study aimed to evaluate the risk of COVID-19 associated thrombosis in patients with congenital thrombophilia. Methods This prospective, case-control study included patients with confirmed COVID-19 infection, followed 6 months post-confirmation. The final outcome was a symptomatic thrombotic event. In total, 90 COVID-19 patients, 30 with known congenital thrombophilia and 60 patients without thrombophilia within the period July 2020–November 2021, were included in the study. Evaluation of hemostatic parameters including FVIII activity and D-dimer was performed for all patients at 1 month, 3 months and 6 months post-COVID-19 diagnosis. Results Symptomatic thrombotic events were observed in 7 out of 30 (23 %) COVID-19 patients with thrombophilia, and 12 out of 60 (20 %) without thrombophilia, P = 0.715. In addition, the two patient groups had comparable localization of thrombotic events, time to thrombotic event, effect of antithrombotic treatment and changes in FVIII activity, while D-dimer level were significantly increased in patients without thrombophilia. Conclusion Our findings suggest that patients with congenital thrombophilia, irrespective of their age, a mild clinical picture and absence of comorbidities, should receive anticoagulant prophylaxis, adjusted based on the specific genetic defect.
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Affiliation(s)
- Mirjana Kovac
- Faculty of Medicine, University of Belgrade, Serbia; Blood Transfusion Institute of Serbia, Hemostasis Department, Belgrade, Serbia.
| | - Gorana Mitic
- Faculty of Medicine Novi Sad, University of Novi Sad, Serbia
| | - Marija Milenkovic
- Faculty of Medicine, University of Belgrade, Serbia; University Clinical Centre of Serbia, Belgrade, Serbia
| | - Dusica Basaric
- Blood Transfusion Institute of Serbia, Hemostasis Department, Belgrade, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Olivera Markovic
- Faculty of Medicine, University of Belgrade, Serbia; University Clinical Hospital Center Bezanijska Kosa, Belgrade, Serbia
| | - Marija Zdravkovic
- Faculty of Medicine, University of Belgrade, Serbia; University Clinical Hospital Center Bezanijska Kosa, Belgrade, Serbia
| | - Vera Ignjatovic
- Murdoch Children's Research Institute, Parkville, Australia; Department of Paediatrics, The University of Melbourne, Australia
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Tomic B, Stankovic Z, Savic D. 111 Fluid levels of estradiol and CA 125 from ovarian cystic masses in young girls. Eur J Obstet Gynecol Reprod Biol 2022. [DOI: 10.1016/j.ejogrb.2022.02.140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kovac M, Eric B, Stojneva-Istatkov J, Lukic V, Milic A, Vukicevic D, Orlic D, Tomic B. Iron status among blood donors deferred due to low haemoglobin level. VOJNOSANIT PREGL 2021. [DOI: 10.2298/vsp190327063k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background/Aim. Haemoglobin (Hb) determination is a routine part of the blood donor selection process. Previously reported studies have revealed that iron deficiency is common in frequent donors. This prospective investigation was aimed at examining iron status among blood donors with low circulating Hb and evaluating correlation between Hb values determined by capillary methods and those obtained by reference method from venous blood count (BC), as well as ferritin level. Methods. Between February 2017 and December 2018, 200 consecutively recruited regular blood donors with low Hb, aged 19 to 64 years (median 39), were included. Hb level was determined using the copper sulphate method, the HemoCue capillary method, and also from venous blood within the complete blood count (CBC) test. Plasma ferritin was determined turbidimetrically. Results. In 42.7% of men and 57.3% of women, ferritin concentration was low (p = 0.008). The relative numbers of males and females, with levels < 12 ?g/L (p = 0.023) or > 50 ?g/L (p = 0.022), differed. Comparison of the values obtained with the capillary methods with reference Hb levels obtained from the CBC test showed that the copper sulphate procedure gave false fails in 10.5% of cases (p < 0.001). Hb values from HemoCue were significantly correlated with Hb values from the CBC test, but no correlation was observed between ferritin levels and Hb levels determined by both capillary method. Conclusion. Low ferritin was observed in 51.5% of Serbian blood donors deferred due to low Hb. Based on our results, the determination of the algorithm in the iron deficiency detection is necessary, while the capillary method (HemoCue) represents a more convenient method for Hb testing prior to blood donation.
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Affiliation(s)
- Mirjana Kovac
- University of Belgrade, Blood Transfusion Institute of Serbia, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia
| | - Bojana Eric
- University of Belgrade, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | | | - Vojislav Lukic
- University of Belgrade, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Ana Milic
- University of Belgrade, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Dragana Vukicevic
- University of Belgrade, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Dusan Orlic
- University of Belgrade, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Branko Tomic
- University of Belgrade, Institute of Molecular Genetics and Genetic Engineering, Belgrade, Serbia
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Pruner I, Dincic E, Gvozdenov M, Tomic B, Kovac M, Djordjevic V. Early-onset ischaemic stroke in patient with novel F2 c.1824C>T gene variant and PAI-1 4G/4G, MTHFR 677TT genotype. VOJNOSANIT PREGL 2021. [DOI: 10.2298/vsp210323066p] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background/Aim. Ischemic stroke is a heterogeneous disorder caused by several
genetic and environmental risk factors. It was suggested that coagulation
disorders cause 1-4% of cases with ischemic stroke, especially in patients
with early-onset of ischemic stroke. Case report. Here, we describe a case
of patient who developed an unprovoked ishemic stroke in young adult.
Biochemical, immunological and thrombophilia screening, as well DNA
sequencing were performed in order to reveal molecular pathology underlying
stroke of patient. Thrombophilia testing showed that patient was homozygous
carrier for PAI-1 4G/5G and MTHFR C677T mutations. Additional genetic
analysis revealed the presence of recently reported FII c.1824C>T gene
variant, which is located in the last exon of prothrombin gene and
previously shown to cause hyperprothrombinemia, hypofibrinolysis and altered
fibrin clot phenotype. Conclusion. Our results suggest that newly reported
FII c.1824C>T gene variant might have synergistic effect with PAI 4G/4G and
MTHFR 677TT genotype in formation of altered fibrin clot phenotype
characterized by thin, densely packed fibrin fibers, which makes clot less
susceptible to fibrinolysis and greatly increases the risk for early
ischemic stroke onset.
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Pruner I, Farm M, Tomic B, Gvozdenov M, Kovac M, Miljic P, Soutari NMH, Antovic A, Radojkovic D, Antovic J, Djordjevic V. The Silence Speaks, but We Do Not Listen: Synonymous c.1824C>T Gene Variant in the Last Exon of the Prothrombin Gene as a New Prothrombotic Risk Factor. Clin Chem 2020; 66:379-389. [PMID: 32040579 DOI: 10.1093/clinchem/hvz015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 09/18/2019] [Indexed: 11/14/2022]
Abstract
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.1824C>T variant as a potential risk factor for pregnancy loss, but it has not yet been associated with thrombotic diseases. METHODS To determine the frequency of the FII c.1824C>T variant we have sequenced patients' DNA. Prothrombin RNA expression was measured by quantitative PCR. Functional analyses included routine hemostasis tests, western blotting and ELISA to determine prothrombin levels in plasma, and global hemostasis assays for thrombin and fibrin generation in carriers of the FII c.1824C>T variant. Scanning electron microscopy was used to examine the structure of fibrin clots. RESULTS Frequency of the FII c.1824C>T variant was significantly increased in patients with venous thromboembolism and cerebrovascular insult. Examination in vitro demonstrated increased expression of prothrombin mRNA in FII c.1824T transfected cells. Our ex vivo study of FII c.1824C>T carriers showed that the presence of this variant was associated with hyperprothrombinemia, hypofibrinolysis, and formation of densely packed fibrin clots resistant to fibrinolysis. CONCLUSION Our data indicate that FII c.1824C>T, although a synonymous variant, leads to the development of a prothrombotic phenotype and could represent a new prothrombotic risk factor. As a silent variant, FII c.1824C>T would probably be overlooked during genetic screening, and our results show that it could not be detected in routine laboratory tests.
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Affiliation(s)
- Iva Pruner
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia.,Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Maria Farm
- Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Clinical Chemistry, Karolinska University Hospital, Stockholm, Sweden
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Maja Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Mirjana Kovac
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,Hemostasis Department, Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Predrag Miljic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,Clinic of Hematology, University Clinical Center, Belgrade, Serbia
| | - Nida Mahmoud Hourani Soutari
- Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Clinical Chemistry, Karolinska University Hospital, Stockholm, Sweden
| | - Aleksandra Antovic
- Department of Medicine, Unit of Rheumatology, Karolinska University Hospital, Stockholm, Sweden.,Academic Specialist Center, Center for Rheumatology, Stockholm Health Services, Stockholm, Sweden
| | - Dragica Radojkovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Jovan Antovic
- Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden.,Clinical Chemistry, Karolinska University Hospital, Stockholm, Sweden
| | - Valentina Djordjevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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Cumbo M, Tomic B, Dunjic S, Jovanovic T, Gvozdenov M, Pruner I, Aralica G, Kapitanovic S, Cacev T, Djordjevic V. Prothrombin 3'end Gene Variants in Patients With Sporadic Colon Adenocarcinoma. Anticancer Res 2019; 39:6067-6071. [PMID: 31704834 DOI: 10.21873/anticanres.13814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/07/2019] [Accepted: 10/08/2019] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Thrombin plays significant roles in various types of cancer. However, the expression levels of prothrombin, the thrombin precursor, in cancer remain unclear. Variants of the 3'end of the prothrombin gene lead to increased prothrombin expression. This study aimed to analyze prothrombin 3'end gene variants in colon tumor and adjacent normal tissue samples. MATERIALS AND METHODS The study group consisted of 93 patients suffering from colon adenocarcinoma. The 3'end of the prothrombin gene was analyzed by DNA sequencing. RESULTS Three variants, all previously associated with increased prothrombin expression were detected. Frequency of the FII 19911G allele was 46.77% and 47.85% in tumor and normal tissue, respectively. For the FII 20210A allele, the detected frequencies were 2.15% and 1.61%, respectively. The frequency of the FII c.1824T allele was 0.54% in both tissues. Four patients showed different genotypes in tumor and normal tissue. CONCLUSION Prothrombin 3' end gene variants may play a role in colorectal cancer.
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Affiliation(s)
- Marija Cumbo
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Sofija Dunjic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Tamara Jovanovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Maja Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Iva Pruner
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Gorana Aralica
- University Hospital Dubrava, Zagreb, Croatia.,Medical School University of Zagreb, Zagreb, Croatia
| | | | | | - Valentina Djordjevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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Kovac M, Mitic G, Djilas I, Kuzmanovic M, Serbic O, Lekovic D, Tomic B, Bereczky Z. Genotype phenotype correlation in a pediatric population with antithrombin deficiency. Eur J Pediatr 2019; 178:1471-1478. [PMID: 31359133 DOI: 10.1007/s00431-019-03433-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 07/12/2019] [Accepted: 07/16/2019] [Indexed: 11/25/2022]
Abstract
Inherited antithrombin (AT) deficiency is a rare autosomal dominant disorder, caused by mutations in the AT gene (SERPINC1). Considering that the genotype phenotype relationship in AT deficiency patients remains unclear, especially in pediatric patients, the aim of our study was to evaluate genotype phenotype correlation in a Serbian pediatric population. A retrospective cohort study included 19 children younger than 18 years, from 15 Serbian families, with newly diagnosed AT deficiency. In 21% of the recruited families, mutations affecting exon 4, 5, and 6 of the SERPINC1 gene that causes type I AT deficiency were detected. In the remaining families, the mutation in exon 2 causing type II HBS (AT Budapest 3) was found. Thrombosis events were observed in 1 (33%) of those with type I, 11 (85%) of those with AT Budapest 3 in the homozygous respectively, and 1(33%) in the heterozygous form. Recurrent thrombosis was observed only in AT Budapest 3 in the homozygous form, in 27% during initial treatment of the first thrombotic event. Abdominal venous thrombosis and arterial ischemic stroke, observed in almost half of the children from the group with AT Budapest 3 in the homozygous form, were unprovoked in all cases.Conclusion: Type II HBS (AT Budapest 3) in the homozygous form is a strong risk factor for arterial and venous thrombosis in pediatric patients. What is Known: • Inherited AT deficiency is a rare autosomal dominant disorder, caused by mutations in the SERPINC1gene. • The genotype phenotype correlation in AT deficiency patients remains unclear, especially in pediatric patients. What is New: • The genetic results for our paediatric population predominantly showed the presence of a single specific mutation in exon 2, that causes type II HBS deficiency (AT Budapest 3). • In this group thrombosis mostly occurred as unprovoked, in almost half of them as abdominal thrombosis or stroke with high incidence of recurrent thrombosis, in 27% during initial treatment.
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Affiliation(s)
- Mirjana Kovac
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia. .,Blood Transfusion Institute of Serbia, Hemostasis Department, Sv. Save 39, Belgrade, 11000, Serbia.
| | - Gorana Mitic
- Institute of Laboratory Medicine, Clinical Center of Vojvodina, Faculty of Medicine Novi Sad, University of Novi Sad, Novi Sad, Serbia
| | - Iva Djilas
- Blood Transfusion Institute of Serbia, Hemostasis Department, Sv. Save 39, Belgrade, 11000, Serbia
| | - Milos Kuzmanovic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,Institute for Health Care of Mother and Child of Serbia Dr Vukan Cupic, Belgrade, Serbia
| | - Olivera Serbic
- Institute for Health Care of Mother and Child of Serbia Dr Vukan Cupic, Belgrade, Serbia
| | - Danijela Lekovic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia.,Clinic of Hematology, Clinical Center of Serbia, Belgrade, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Zsuzsanna Bereczky
- Division of Clinical Laboratory Research, Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Kovac M, Kovac Z, Tomasevic Z, Tomic B, Gvozdenov M, Radojkovic D. Breast cancer and recurrent thrombosis - Results from prospective single center study. Breast J 2019; 25:783-785. [PMID: 31079419 DOI: 10.1111/tbj.13326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 04/23/2018] [Accepted: 04/24/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Mirjana Kovac
- Blood Transfusion Institute of Serbia, Belgrade, Serbia
| | - Zeljko Kovac
- National Cancer Research Institute, Belgrade, Serbia
| | | | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Maja Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Dragica Radojkovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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Kovac M, Mitic G, Mikovic Z, Mandic V, Miljic P, Mitrovic M, Tomic B, Bereczky Z. The influence of specific mutations in the AT gene (SERPINC1) on the type of pregnancy related complications. Thromb Res 2018; 173:12-19. [PMID: 30458337 DOI: 10.1016/j.thromres.2018.11.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 10/17/2018] [Accepted: 11/07/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Inherited antithrombin (AT) deficiency is a rare autosomal dominant disorder, caused by mutations in the SERPINC1 gene. The most common clinical presentation in AT deficient patients includes venous thrombosis and pulmonary embolism, while the association of AT deficiency and its effect on the development of pregnancy complications has been less studied. The aim of our research was to evaluate the effect of AT deficiency types, determined by genotyping, on pregnancy outcomes. METHODS A retrospective cohort study included 28 women with AT deficiency, and their 64 pregnancies were analyzed. RESULTS With regard to live birth rate, a significant difference was observed among women who were carriers of different SERPINC1 mutations, as the rate varied from 100% in cases of type I to the extremely low rate of 8% for women with type II HBS (AT Budapest 3) in the homozygous variant, P = 0.0005. All pregnancies from the type I group, even untreated ones, resulted in live births. In women with AT Budapest 3 in homozygous variant the overall live birth rate increased to 28.5% in the treated pregnancies. In this group the highest incidence of fetal death was observed of 62%; repeated fetal losses in 30%; fetal growth restriction in 22% and placental abruption in 7% of all pregnancies. CONCLUSION Our study results indicate a difference between type I and type II AT deficiency. The risk of pregnancy related VTE was equally present in both groups, except for AT Budapest 3 in the heterozygous variant, while adverse pregnancy outcomes were strictly related to type II, especially AT Budapest 3 in the homozygous variant.
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Affiliation(s)
- Mirjana Kovac
- Faculty of Medicine, University of Belgrade, Serbia; Blood Transfusion Institute of Serbia, Hemostasis Department, Belgrade, Serbia.
| | - Gorana Mitic
- Institute of Laboratory Medicine, Clinical Center of Vojvodina, Faculty of Medicine Novi Sad, University of Novi Sad, Serbia
| | - Zeljko Mikovic
- Faculty of Medicine, University of Belgrade, Serbia; Gynecology and Obstetrics Clinic Narodni Front, Belgrade, Serbia
| | - Vesna Mandic
- Faculty of Medicine, University of Belgrade, Serbia; Gynecology and Obstetrics Clinic Narodni Front, Belgrade, Serbia
| | - Predrag Miljic
- Faculty of Medicine, University of Belgrade, Serbia; Clinic of Hematology, Clinical Center of Serbia, Serbia
| | - Mirjana Mitrovic
- Faculty of Medicine, University of Belgrade, Serbia; Clinic of Hematology, Clinical Center of Serbia, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Zsuzsanna Bereczky
- Division of Clinical Laboratory Research, Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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Kovac M, Mitic G, Lalic-Cosic S, Djordjevic V, Tomic B, Muszbek L, Bereczky Z. Evaluation of endogenous thrombin potential among patients with antithrombin deficiency. Thromb Res 2018; 166:50-53. [DOI: 10.1016/j.thromres.2018.04.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 03/27/2018] [Accepted: 04/06/2018] [Indexed: 11/28/2022]
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14
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Miljic P, Gvozdenov M, Takagi Y, Takagi A, Pruner I, Dragojevic M, Tomic B, Bodrozic J, Kojima T, Radojkovic D, Djordjevic V. Clinical and biochemical characterization of the prothrombin Belgrade mutation in a large Serbian pedigree: new insights into the antithrombin resistance mechanism. J Thromb Haemost 2017; 15:670-677. [PMID: 28075532 DOI: 10.1111/jth.13618] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Indexed: 11/28/2022]
Abstract
Essentials Prothrombin Belgrade mutation leads to antithrombin resistance. Clinical and biochemical phenotypes in a large family with this mutation were investigated. In carriers, we detected decreased factor II activity and increased endogenous thrombin potential. Prothrombin Belgrade mutation represents a strong prothrombotic risk factor. SUMMARY Background The recently reported c.1787G>A mutation in the prothrombin gene leads to Arg596Gln replacement in the protein molecule (prothrombin Belgrade). This substitution impairs binding of antithrombin to thrombin and results in inherited thrombophilia, known as antithrombin resistance. Objectives We aimed to elucidate the clinical and biochemical characteristics of thrombophilia associated with antithrombin resistance in a large Serbian family with the prothrombin Belgrade mutation. Patients and methods Nineteen family members were investigated, among whom 10 were carriers of the c.1787G>A mutation. In all subjects the clinical phenotype was determined and laboratory investigations of hemostatic parameters were performed. Results Six out of the 10 mutation carriers developed thromboembolic events, mainly deep venous and mesenteric vein thrombosis. The median age of the first thrombotic event was 26.5 (12-41) years, whereas the incidence rate of first thrombosis was 2.2% per year. In all mutation carriers prothrombin activity was significantly decreased in comparison with non-carriers, clearly distinguishing each group. However, the presence of the mutation did not affect the prothrombin antigen level in plasma. The endogenous thrombin potential was significantly increased in all carriers in comparison with non-carriers, indicating the presence of blood hypercoagulability. Interestingly, levels of D-dimer and the F1+2 fragment were similar in both groups. Conclusions Although rare, the prothrombin Belgrade mutation represents strong thrombophilia with early onset of thrombosis in the investigated family. According to our results, decreased prothrombin activity may be a simple screening test for detection of this mutation in thrombotic patients.
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Affiliation(s)
- P Miljic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- Clinic of Hematology, University Clinical Center, Belgrade, Serbia
| | - M Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Serbia
| | - Y Takagi
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - A Takagi
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - I Pruner
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Serbia
| | - M Dragojevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Serbia
| | - B Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Serbia
| | - J Bodrozic
- Clinic of Hematology, University Clinical Center, Belgrade, Serbia
| | - T Kojima
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - D Radojkovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Serbia
| | - V Djordjevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia, Serbia
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15
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Gvozdenov M, Pruner I, Tomic B, Kovac M, Radojkovic D, Djordjevic V. [The effect of FII c.1787G>A (prothrombin Belgrade) mutation on prothrombin gene expression in vitro]. Mol Biol (Mosk) 2017; 51:59-63. [PMID: 28251967 DOI: 10.7868/s0026898416060070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 02/24/2016] [Indexed: 11/23/2022]
Abstract
The FII c.1787G>A (prothrombin Belgrade) is a novel prothrombotic mutation which leads to impaired inhibition of thrombin by antithrombin (antithrombin resistance). So far, the mechanism of this variant has not been fully elucidated. To investigate the effect of FII c.1787G>A mutation on the prothrombin gene expression, its functional analysis was performed in vitro. By Real-Time PCR, expression levels of FII gene variants were evaluated in Cos-7 cells transiently transfected with c.1787G (wild-type) and c.1787A prothrombin expression vectors, with no differences observed. The relative quantification of prothrombin protein amounts was accomplished by Western blot analysis, also with no differences observed. Therefore, the mechanism of FII c.1787G>A mutation does not alter prothrombin expression profile.
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Affiliation(s)
- M Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia.,
| | - I Pruner
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia
| | - B Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia
| | - M Kovac
- Faculty of Medicine, University of Belgrade, Serbia.,Blood Transfusion Institute of Serbia, Hemostasis Department, Belgrade, Serbia
| | - D Radojkovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia
| | - V Djordjevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Serbia
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16
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Gvozdenov M, Pruner I, Tomic B, Kovac M, Radojkovic D, Djordjevic V. The effect of FII c.1787G>A (prothrombin Belgrade) mutation on prothrombin gene expression in vitro. Mol Biol 2017. [DOI: 10.1134/s0026893316060078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Topic A, Malic Z, Francuski D, Stankovic M, Markovic B, Soskic B, Tomic B, Ilic S, Dobrivojevic S, Drca S, Radojkovic D. Gender-related differences in susceptibility to oxidative stress in healthy middle-aged Serbian adults. Biomarkers 2016; 21:186-93. [PMID: 26754535 DOI: 10.3109/1354750x.2015.1126647] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Gender-related differences in the association between polymorphism of xenobiotic-metabolising enzymes or non-genetic biomarkers and susceptibility to oxidative stress was assessed in healthy middle-aged Serbian adults, by urinary 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG/creatinine) and total antioxidant status in serum (TAOS). Females were more susceptible to oxidative stress. In both genders, positive predictor of the antioxidative protection was serum triglyceride, while BMI <25 kg/m(2) was associated with oxidative stress. Susceptibility to oxidative stress in males was associated with GSTT1*null allele and increased serum iron, but in females, it was decreased serum bilirubin. Early identification of the risk factors could be important in the prevention of oxidative stress-related diseases.
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Affiliation(s)
- Aleksandra Topic
- a Department of Medical Biochemistry , Faculty of Pharmacy, University of Belgrade , Belgrade , Serbia
| | - Zivka Malic
- b Faculty of Pharmacy , University of Bijeljina , Bijeljina , Bosnia & Herzegovina
| | - Djordje Francuski
- c Institute of Molecular Genetics and Genetic Engineering, University of Belgrade , Belgrade , Serbia
| | - Marija Stankovic
- c Institute of Molecular Genetics and Genetic Engineering, University of Belgrade , Belgrade , Serbia
| | - Bojan Markovic
- d Department of Pharmaceutical Chemistry , Faculty of Pharmacy, University of Belgrade , Belgrade , Serbia
| | - Blagoje Soskic
- c Institute of Molecular Genetics and Genetic Engineering, University of Belgrade , Belgrade , Serbia
| | - Branko Tomic
- c Institute of Molecular Genetics and Genetic Engineering, University of Belgrade , Belgrade , Serbia
| | - Stefan Ilic
- c Institute of Molecular Genetics and Genetic Engineering, University of Belgrade , Belgrade , Serbia
| | - Snezana Dobrivojevic
- e Clinical Chemical Laboratory, Health Centre , "Stari Grad", Belgrade , Serbia , and
| | - Sanja Drca
- f Clinical Chemical Laboratory, General Hospital , Pancevo , Serbia
| | - Dragica Radojkovic
- c Institute of Molecular Genetics and Genetic Engineering, University of Belgrade , Belgrade , Serbia
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Tomic B, Kusic-Tisma J. HsOrc4-Dependent Dna Remodeling of the ori-β Dhfr Replicator. Cell Mol Biol Lett 2015; 20:549-61. [PMID: 26124052 DOI: 10.1515/cmble-2015-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 06/18/2015] [Indexed: 11/15/2022] Open
Abstract
Replication of DNA in multicellular organisms initiates from origin of replication (ori) sequences, which significantly differ in length and complexity. One of the best characterized is hamster dihydrofolate reductase (DHFR), which contains the ori-β sequence with several functionally relevant domains, such as an AT-rich region, dinucleotide repeat element (DNR), sequence-induced bend DNA (BEND) and a RIP60 protein-binding site (RIP60). Prior to initiation, ori sequences are recognized by origin recognition complex (ORC), which is a hetero hexamer complex that serves as the landing pad for proteins of the pre-replication complex. The function of each ORC subunit is still unclear. In this study, we analyze the function of subunit 4 of the human ORC complex (HsOrc4) in interaction with a plasmid bearing the ori-β DHFR sequence. We show that the topologically closed DHFR ori-β replicator contains a bubble-like structure within its AT-rich region and that it is reversibly modified in the interaction with HsOrc4. The non-canonical structure of the AT-rich region in the topologically closed ori sequence is recognized and changed by HsOrc4 using the energy of supercoiled DNA. These findings could help to further elucidate DNA replication and its possible association with human genetic diseases.
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Gvozdenov M, Pruner I, Tomic B, Aradjanski M, Antonijevic N, Radojkovic D, Djordjevic V. Prothrombin 3'end gene variants in isolated pulmonary embolism--the first report of FIIc.*64_*66del and FIIc.*303T>C variants. Acta Cardiol 2015; 70:177-82. [PMID: 26148378 DOI: 10.1080/ac.70.2.3073509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Pulmonary embolism is usually considered as a complication of deep vein thrombosis, but there are still a number of cases of isolated pulmonary embolism. We aimed to investigate whether prothrombin 3'end gene variants might play a significant role in the pathogenesis of isolated pulmonary embolism. METHODS AND RESULTS In this study 100 patients with isolated pulmonary embolism and 100 controls were screened by DNA sequencing. Screening included last intron, last exon, 3'UTR and part of the 3'FR region of the prothrombin gene. Our results have shown that heterozygous carriers of the FIi G2021 OA variant have a significantly higher risk of isolated pulmonary embolism (OR 4.83; 95% CI 1.33-17.52; P=0.02). Carriers of the Ili 19911GG genotype (OR 1.41; 95% CI 0.72-2.73; P=0.31) and FII 20068CT genotype (OR 3.06; 95% CI 0.31-29.95; P=0.34) were more frequent in patients with isolated pulmonary embolism compared to controls. We also detected the novel gene variants, FIIc.*64_*66del and FII c.*303T>C, in two patients. CONCLUSIONS Our results suggest that FII G20210A represents a significant risk factor for isolated pulmonary embolism. The FII G19911A and FII C20068T are potentially associated with an increased risk for the occurrence of isolated pulmonary embolism, but the results did not reach statistical significance. This is the first study in which the two novel 3'end prothrombin gene variants, FIIc.*64_*66del and FlI c.*303T>C, were reported.
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Affiliation(s)
- Maja Gvozdenov
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Iva Pruner
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Marijana Aradjanski
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Nebojsa Antonijevic
- Faculty of Medicine, University of Belgrade, Belgrade, Serbia
- Clinic for Cardiology, Clinical Center of Serbia, Belgrade, Serbia
| | - Dragica Radojkovic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Valentina Djordjevic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
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20
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Djordjevic V, Pruner I, Tomic B, Nestorovic A, Gvozdenov M, Kovac M, Radojkovic D. The 3'end prothrombin gene variants in patients with different thrombotic events. Lab Med 2014; 45:309-14. [PMID: 25316662 DOI: 10.1309/lm8e84zslpdmwzcm] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
BACKGROUND Prothrombin (FII) A19911G and C20221T gene variants are associated with increased prothrombin levels and potentially represent thrombotic risk factors. OBJECTIVE To determine the frequency of A19911G and C20221T FII gene variants in patients with thrombotic disorders and in women who have experienced pregnancy loss (PL). METHODS We determined the frequency of these variants in 133 patients with deep venous thrombosis (DVT), 80 patients with isolated pulmonary embolism (PE), 101 patients with idiopathic PL, and 180 control individuals. RESULTS The FII A19911G variant was more prevalent in patients with DVT and with PL compared with controls; however, these differences were not statistically significant. The 19911GG genotype was associated with increased risk of PE (odds ratio, 1.91; 95% confidence interval, 1.04-3.51). We did not detect carriers of the FII C20221T gene variant in this study. CONCLUSIONS This is the first study, to our knowledge, that demonstrates the FII 19911GG genotype may represent a risk factor for isolated PE. Also, our results show that the FII C20221T is a rare variant in this population and therefore, routine thrombophilia screening should not include screening for this genotype.
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Affiliation(s)
| | - Iva Pruner
- Institute of Molecular Genetics and Genetic Engineeringand
| | - Branko Tomic
- Institute of Molecular Genetics and Genetic Engineeringand
| | | | - Maja Gvozdenov
- Institute of Molecular Genetics and Genetic Engineeringand
| | - Mirjana Kovac
- Faculty of Medicine, University of Belgrade, Serbia Blood Transfusion Institute of Serbia, Haemostasis Department, Belgrade, Serbia
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Spasojevic Brkic VK, Djurdjevic T, Dondur N, Klarin MM, Tomic B. An empirical examination of the impact of quality tools application on business performance: Evidence from Serbia. Total Quality Management & Business Excellence 2013. [DOI: 10.1080/14783363.2012.677306] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Abstract
In higher eukaryotes mechanism of DNA replication origin recognition and binding by origin recognition complex (ORC) is still unknown. Origin transfer studies have shown that origin sites are genetically determined, containing functionally interchangeable modules. One of such modules from the human lamin B2 origin of replication has the ability to adopt unorthodox structure partly composed of intramolecular triplex. Sequences involved in triplex formation coincide with ORC binding sites both in vitro and in vivo. To explore potential significance of unorthodox DNA structures in origin recognition by ORC, we tested DNA binding properties of human ORC subunit 4 (HsOrc4) which has independent DNA binding activity in vitro and similar binding characteristics as ORC holocomplex. Our results demonstrated that DNA binding activity of HsOrc4 depends on length and structure of DNA with triplex being the protein's preferred binding target. Such feature could play part in origin selection through directing ORC to DNA sequence prone to adopt unorthodox structure.
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Affiliation(s)
- J Kusic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Vojvode Stepe 444a, 11000 Belgrade, Serbia.
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Stefanovic D, Kusic J, Divac A, Tomic B. Formation of noncanonical DNA structures mediated by human ORC4, a protein component of the origin recognition complex. Biochemistry 2008; 47:8760-7. [PMID: 18652488 DOI: 10.1021/bi800684f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Many genomic sequences, DNA replication origins included, contain specific structural motifs prone to alternative base pairing. Structural rearrangements of DNA require specific environmental conditions and could be favored by chemical agents or proteins. To improve our understanding of alternative conformations of origins and the manner in which they form, we have investigated the effect of DNA-binding, AAA+ protein human ORC4 on single-stranded origin DNA or various oligonucleotides. Here we demonstrate that human ORC4 stimulated formation of inter- and intramolecular T.A.T triplexes and created novel structures, such as homoadenine duplexes. Adenine-based structures were held together by Hoogsteen hydrogen bonds, as demonstrated on 7-deaza-dAMP- or dAMP-containing substrates, and characterized by increased thermal stability. Adenine pairing occurred only in the presence of human ORC4, in a neutral buffer supplemented with ATP and Mg (2+) ions. The protein mutant that could not bind ATP was inactive in this reaction. Since the action of human ORC4 could be biologically important, its potential impact on DNA replication is discussed.
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Affiliation(s)
- Dragana Stefanovic
- Institute of Molecular Genetics and Genetic Engineering, Vojvode Stepe 444a, P.O. Box 23, 11010 Belgrade, Serbia.
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Nikolic A, Divac A, Stankovic M, Dinic J, Tomic B, Ljujic M. Analysis of common CFTR polymorphisms 5T, M470V and R75Q in healthy Serbian population. Genetika 2006; 42:996-8. [PMID: 16915933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Three common CFTR polymorphisms, 5T, M470V and R75Q, have been shown to be relatively frequent in Serbian patients with monosymptomatic CF disorders. Since there is a variation in distribution of common polymorphisms among different populations, it was important to compare their frequencies in patients with the frequencies in healthy population in order to assess the possible role of these polymorphisms in the monosymptomatic CF disorders. Samples obtained from 100 healthy Serbian individuals were analyzed for the presence of CFTR 5T, M470V and R75Q variants by PSM, RFLP and DGGE methods, respectively. Allele 5T was present in two individuals, giving the allelic frequency of 1% (2/200 alleles). The frequency obtained for allele M470 was 45% (90/200 alleles), while V470 allele was present with the frequency of 55% (110/200 alleles). Polymorphism R75Q was present in two individuals, with allelic frequency of 1% (2/200 alleles). Our study has shown that the frequencies of two common polymorphisms, 5T and M470V, differ significantly in Serbian population in comparison with other South European populations. Since it appears that Serbian population has a specific distribution of studied CFTR gene variants, it would also be interesting to analyze other common variants of this gene in our population. Such data can also be potentially useful as anthropogenetic markers in population studies.
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Affiliation(s)
- A Nikolic
- Institute of Molecular Genetics and Genetic Engineering, Belgrade, Serbia and Montenegro
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Nikolic A, Divac A, Stankovic M, Dinic J, Tomic B, Ljujic M. Analysis of common CFTR polymorphisms 5T, M470V, and R75Q in healthy Serbian population. RUSS J GENET+ 2006. [DOI: 10.1134/s1022795406070192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lederman L, Niehaus F, Tomic B. Probabilistic safety assessment past, present and future An IAEA perspective. Nuclear Engineering and Design 1996. [DOI: 10.1016/0029-5493(95)01107-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Tomic B. International activities to improve the methods of probabilistic safety assessment and to support its applications / Verbesserung von Methoden der probabilistischen Sicherheitsanalyse und Unterstützung ihrer Anwendung im internationalen Rahmen. KERNTECHNIK 1995. [DOI: 10.1515/kern-1995-602-308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Tomic B, Nikolic A, Tomasevic V. Ivanjica: a community conquers health. Int J Health Educ 1977; 20:1-17. [PMID: 899288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Yagoubi Z, Tomic B. [Poliomyelitis in Algeria from the viewpoint of rehabilitation]. Tunis Med 1967; 45:211 passim. [PMID: 5622123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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