Simultaneous allele-specific amplification: A strategy using modified primer-template mismatches for SNP detection[mdash ]Application to prothrombin 20210A (factor II) and factor V Leiden (1691A) gene mutations

2001 ◽  
Vol 6 (3) ◽  
pp. 201-209 ◽  
Author(s):  
S DelRio-LaFreniere
Keyword(s):  
Gene Mutations ◽  
Factor V Leiden ◽  
Factor V ◽  
Snp Detection ◽  
Factor Ii ◽  
Allele Specific ◽  
Specific Amplification ◽  
Prothrombin 20210A

Simple and Rapid Detection of Factor V Leiden by Allele-specific PCR Amplification

1996 ◽  
Vol 75 (05) ◽  
pp. 757-759 ◽  
Author(s):  
Rainer Blasczyk ◽  
Markus Ritter ◽  
Christian Thiede ◽  
Jenny Wehling ◽  
Günter Hintz ◽  
...  
Keyword(s):  
Direct Sequencing ◽  
Activated Protein C ◽  
Factor V Leiden ◽  
Pcr Amplification ◽  
Factor V ◽  
Specific Pcr ◽  
Pcr Rflp ◽  
Allele Specific ◽  
Specific Amplification ◽  
Allele Specific Pcr

SummaryResistance to activated protein C is the most common hereditary cause for thrombosis and significantly linked to factor V Leiden. In this study, primers were designed to identify the factor V mutation by allele-specific PCR amplification. 126 patients with thromboembolic events were analysed using this technique, PCR-RFLP and direct sequencing. The concordance between these techniques was 100%. In 27 patients a heterozygous factor VGln506 mutation was detected, whereas one patient with recurrent thromboembolism was homozygous for the point mutation. Due to its time- and cost-saving features allele-specific amplification should be considered for screening of factor VGln506.

Coexistence of Factor V Leiden and Factor II A20210 Mutations and Recurrent Venous Thromboembolism

1999 ◽  
Vol 82 (12) ◽  
pp. 1583-1587 ◽  
Author(s):  
Giovanna D’Andrea ◽  
Donatella Colaizzo ◽  
Giuseppe Cappucci ◽  
Annamaria del Popolo ◽  
Vincenzo Brancaccio ◽  
...  
Keyword(s):  
Venous Thromboembolism ◽  
Antiphospholipid Antibodies ◽  
Gene Mutations ◽  
Factor V Leiden ◽  
Factor V ◽  
Factor Ii ◽  
Recurrent Venous Thromboembolism ◽  
Fv Leiden ◽  
Gene Defects ◽  
Work Up

SummaryPatients carrying the FV Leiden or the FII A20210 mutation have a high risk of venous thromboembolism. Among 542 patients with a documented diagnosis of deep venous thrombosis in one leg consecutively referred for a thrombophilic work-up, we have retrospectively assessed the rate of objectively documented previous recurrence in carriers of both FV Leiden and FII A20210 mutations. Eighty-two patients had experienced 115 episodes of recurrent venous thromboembolism. The rate of recurrent venous thromboembolism was 29.2% among subjects with and 14.5% in those without deficiencies of natural anticoagulant proteins (p = 0.055), and 24.6% among patients with and 14.0% in those without antiphospholipid antibodies (p = 0.036). The frequency of having a recurrent thromboembolism was 16.2%, 20.0%, and 36.4% among carriers of FV Leiden, FII A20210 mutation, or both gene defects, respectively, and 12.8% in subjects carrying neither mutation (p for trend = 0.004). When adjusted for age, sex, and thrombophilic risk factors, the rate was higher among patients with than in those without deficiencies of natural anticoagulant proteins (OR: 3.0; 95% CI: 1.2-7.5), aPL 2.5 (95% CI: 1.3-4.9), or both FV Leiden and FII A20210 gene mutations (OR 4.8; 95% CI: 1.9-12.2).The rate of previous recurrent venous thromboembolism was significantly higher in subjects carrying both FV Leiden and FII 20210 mutations and was comparable to that observed in subjects with deficiencies of natural anticoagulant proteins or antiphospholipid antibodies.

scholarly journals Association of venous thromboembolism and myocardial infarction with Factor V Leiden and Factor II gene mutations among Libyan patients

2021 ◽  
Vol 16 (1) ◽  
pp. 1857525
Author(s):  
Abdulghani Msalati ◽  
Abdulla Bashein ◽  
Murad Ghrew ◽  
Ibtesam Khalil ◽  
Khaled Sedaa ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Venous Thromboembolism ◽  
Gene Mutations ◽  
Factor V Leiden ◽  
Factor V ◽  
Factor Ii

Thrombophilic Genetic Mutations Have No Impact in the Pathogenesis of Thromboembolism in Gastro-Intestinal Cancer Patients.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 3518-3518
Author(s):  
Odoardo M. Olimpieri ◽  
Gaia Schiavon ◽  
Barbara Giannetti ◽  
Maria C. Tirindelli ◽  
Daniele Santini ◽  
...  
Keyword(s):  
Cancer Patients ◽  
Gene Mutations ◽  
Factor V Leiden ◽  
Mthfr Gene ◽  
Intestinal Cancer ◽  
Genetic Mutations ◽  
Factor V ◽  
C677t Polymorphism ◽  
Factor Ii ◽  
C677t Mutation

Abstract Deep venous thrombosis and pulmonary embolism are well recognized and feared complications in cancer patients, with a considerable impact on the overall survival and the quality of life. During the last years many prothrombotic genetic mutations have been described, of these the most common are: Factor V Leiden, prothrombin G20210A gene mutation and the C677T mutation in the 5,10 methylenetetrahydrofolate reductase (MTHFR) gene. Aim of this study was to asses the impact of these thrombophilic gene mutations on the development of VTE (Venous ThromboEmbolism) in patients with gastro-intestinal neoplasms. Moreover, we have tried to determine whether or not the C677T polymorphism of the MTHFR gene was associated with a higher toxicity during chemotherapy with antimetabolites such as 5-FU. From October 2002 to June 2004 48 patients (aged more than 18 years) not assuming anticoagulant therapy, with a new histopathologic diagnosis of gastro-intestinal cancer and no known hematologic or immunologic diseases were investigated by standard polymerase chain reaction techniques for the presence of the above thrombophilic gene mutations. Of the 48 tested patients, a homozygous or heterozygous Factor V Leiden was present respectively in 1 and 3, while the G20210A Factor II mutation was observed in 6 patients (all heterozygous). The C677T mutation in the MTHFR gene allelic frequency in the studied population was 46%. A VTE was observed in 7/48 patients (14.5%) and none of these patients had Factor V Leiden or G20210A Factor II mutations while 4 had a C677T MTHFR mutation. Therefore, none of the thrombophilic genetic mutations studied was associated to the development of VTE in the cohort of gastro-intestinal cancer patients. On the contrary chemotherapy (P=0.007) and advanced inoperable disease (P=0.009) were the only risk factors statistically significant for the development of VTE. As for toxicity during chemotherapy with antimetabolites, it was present in 25% of patients with the C677T polymorphism of the MTHFR while none of the patients without mutation had a toxicity (P=0.06). In conclusion, thrombophilic genetic mutations have no effect on the development of VTE in gastro-intestinal cancer patients. Moreover, we confirm that chemotherapy and an advanced disease play an important role in the pathogenesis of VTE in cancer patients. Furthermore, patients carrier of the C677T mutation in the MTHFR gene have a higher risk (OR: 1.4; C.I. 95%: 0.88–2.24) of toxicity during an antimetabolites-based chemotherapy.

A Hemi-nested, Allele Specific, Whole Blood PCR Assay for the Detection of the Factor V Leiden Mutation

1997 ◽  
Vol 77 (06) ◽  
pp. 1154-1155 ◽  
Author(s):  
Gary D Sinclair ◽  
Sandra Low ◽  
Man-Chiu Poon
Keyword(s):  
Whole Blood ◽  
Protein C ◽  
Activated Protein C ◽  
Factor V Leiden ◽  
Restriction Enzyme Digestion ◽  
Factor V ◽  
Pcr Assay ◽  
Specific Primers ◽  
Factor V Leiden Mutation ◽  
Allele Specific

SummaryWe describe a novel hemi-nested, allele specific whole blood PCR assay for detection of the factor V Leiden mutation associated with the plasma defect, activated protein C resistance. This assay utilizes 5 μl of whole blood without prior DNA extraction. The hemi-nested design, employing an outer primer pair in combination with nested, allele specific primers obviates the need for restriction enzyme digestion. PCR reactions are analysed directly on agarose or polyacrylamide minigels. The assay confirmed the genotypes of 50 individuals previously categorized by PCR and Mnll digestion, and has been subsequently utilized in the genotyping of 445 individuals referred for thrombosis studies.

Homozygous and double heterozygous Factor V Leiden and Factor II G20210A genotypes predispose infants to thromboembolism but are not associated with an increase of foetal loss

2003 ◽  
Vol 90 (10) ◽  
pp. 628-635 ◽  
Author(s):  
Patrick Hundsdoerfer ◽  
Barbara Vetter ◽  
Brigitte Stöver ◽  
Christian Bassir ◽  
Tristess Scholz ◽  
...  
Keyword(s):  
Factor V Leiden ◽  
Individual Risk ◽  
Factor V ◽  
Thromboembolic Events ◽  
Foetal Loss ◽  
Asymptomatic Children ◽  
Factor Ii ◽  
The Individual ◽  
The Impact

SummaryProspective and controlled data about the individual risk profile in asymptomatic children with homozygous or double heterozygous risk genotypes for Factor V Leiden (FVL) and factor II (FII) G20210A are currently unavailable. The systematic and prospective observational study presented here was designed to determine the impact of the homozygous and double heterozygous FVL and FII G20210A genotypes on the prenatal and postnatal risk profiles of affected children. Risk infants and heterozygous controls were identified by screening of 85,304 neonates. Follow-up included the comparison of prenatal and postnatal development, ultrasonography of brain and kidneys, and a panel of independent determinants of thrombophilia. The numbers of identified or expected FVL homozygotes and double heterozygotes did not differ significantly (FVL: 116 ver-sus 91, p=0.08; FVL/FII: 94 versus 76, p=0.17), indicating the absence of a prenatal disadvantage. A prenatal advantage was suggested in FII homozygotes, whose identified number far exceeded the expected (19 versus 4, p=0.002). Clinical and/or imaging abnormalities indicated spontaneous thromboembolic events in 4 of 129 risk infants (3%) but in none of the 178 controls (p=0.02). Physical and neurological development was normal in both groups during the first 2 years of life. The risk genotypes appear to confer a significant predisposition for spontaneous thromboembolic events in infancy without impeding development within the first two years of life. Foetal risk genotypes do not cause an increased foetal loss rate. Moreover, homozygous FII G20210A appears to be associated with a prenatal advantage.

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