Measurement of Activated Protein C Resistance during Menstrual Cycle in Women with and without the Leiden Mutation

2001 ◽  
Vol 85 (04) ◽  
pp. 614-618 ◽  
Author(s):  
K. Bremme ◽  
M. Blombäck ◽  
M. L. Wramsby
Keyword(s):  
Menstrual Cycle ◽  
Luteal Phase ◽  
Protein C ◽  
Activated Protein C ◽  
Factor V ◽  
Activated Protein C Resistance ◽  
Blood Samples ◽  
Plasma Methods

SummaryVariations in the APC ratio during the menstrual cycle were assessed in 25 women without the Leiden mutation, and 10 women who were carrier of the mutation. Blood samples were collected at four occasions during one menstrual cycle. APC ratios were measured with two APTT based plasma methods with and without factor V depleted plasma.None of the methods were able to accurately discriminate between mutated and non mutated women in all samples. Although a normalized method with factor V depleted plasma was favorable.The levels of estradiol and progesterone did not differ between mutated and non mutated women.Our findings suggest that the level of estradiol at estimated time of ovulation is of importance for the response to APC during luteal phase, since the women exhibiting the highest levels of estradiol at time for ovulation had the lowest response to APC.

Coagulation Factor V Leiden Mutation Was Detected in the Patients with Activated Protein C Resistance in Thailand

1998 ◽  
Vol 80 (08) ◽  
pp. 344-345 ◽  
Author(s):  
Pasra Arnutti ◽  
Motofumi Hiyoshi ◽  
Wichai Prayoonwiwat ◽  
Oytip Nathalang ◽  
Chamaiporn Suwanasophon ◽  
...  
Keyword(s):  
Protein C ◽  
Activated Protein C ◽  
Factor V Leiden ◽  
Coagulation Factor ◽  
Factor V ◽  
Activated Protein C Resistance ◽  
Factor V Leiden Mutation ◽  
Coagulation Factor V

The Diagnosis and Clinical Manifestations of Activated Protein C Resistance: A Case Report and Review of the Literature

1996 ◽  
Vol 1 (4) ◽  
pp. 275-280 ◽  
Author(s):  
Howard Daniel Hoerl ◽  
Aldo Tabares ◽  
Kandice Kottke-Marchant
Keyword(s):  
Case Report ◽  
Protein C ◽  
Activated Protein C ◽  
Clinical Manifestations ◽  
Factor V Leiden ◽  
Laboratory Diagnosis ◽  
Factor V ◽  
Review Of The Literature ◽  
Activated Protein C Resistance ◽  
Genetic Anomaly

Activated protein C resistance (APCR) is a recently discovered, medically important cause of venous thrombosis. More than 95% of cases are due to factor V Leiden (FVL), a mutated form of factor V that is resistant to degradation by activated protein C. The prevalence of this disorder, which is inherited in an autosomal dominant fashion, is approximately 5% among asymptomatic people of European heritage. In addition, 20 to 60% of patient cohorts with previous thrombosis demonstrate APCR, making it the most common known genetic cause of abnormal thrombophilia. Current laboratory techniques available for diagnosis include functional assays, such as the APC ratio, as well as DNA-based tests that detect the specific genetic anomaly responsible for FVL. A case report is presented, along with a review of the literature highlighting epidemiology, pathogenesis, clinical features and methods for laboratory diagnosis.

scholarly journals Improved Distinction of Factor V Wild-Type and Factor V Leiden Using a Novel Prothrombin-Based Activated Protein C Resistance Assay

2004 ◽  
Vol 122 (6) ◽  
pp. 836-842 ◽  
Author(s):  
Marianne Wilmer ◽  
Christoph Stocker ◽  
Beatrice Bühler ◽  
Brigitte Conell ◽  
Andreas Calatzis
Keyword(s):  
Protein C ◽  
Activated Protein C ◽  
Factor V Leiden ◽  
Factor V ◽  
Wild Type ◽  
Activated Protein C Resistance

scholarly journals Activated Protein C Resistance and Factor V Leiden in Mexico

2007 ◽  
Vol 14 (4) ◽  
pp. 428-437 ◽  
Author(s):  
Abraham Majluf-Cruz ◽  
Manuel Moreno-Hernández ◽  
Adriana Ruiz-de-Chávez-Ochoa ◽  
Rosario Monroy-García ◽  
Karim Majluf-Cruz ◽  
...  
Keyword(s):  
Protein C ◽  
Activated Protein C ◽  
Factor V Leiden ◽  
Factor V ◽  
Activated Protein C Resistance ◽  
Factor V Leiden Mutation ◽  
Common Cause ◽  
Factor V Gene ◽  
V Gene ◽  
Low Prevalence

A common cause of hereditary thrombophilia is activated protein C resistance (APCR), and most cases result from factor V Leiden mutation. An APCR phenotype without association with factor V Leiden has been described. This transversal, observational, nonrandomized study evaluated these 2 phenomena in healthy indigenous and mestizo Mexican subjects (n = 4345), including 600 Mexican natives. No indigenous subjects had APCR, but 82 mestizo subjects did. After retesting, 50 subjects had a negative test. The remaining 32 subjects had factor V Leiden, giving a 0.85% prevalence of factor V Leiden in the mestizo Mexican population. Only 31% of APCR carriers had factor V Leiden. These results show a very low prevalence of APCR and factor V Leiden in Mexico. Except for factor V Leiden, there are no other mutations in the factor V gene responsible for the APCR phenotype. Acquired APCR is nearly twice as prevalent as the inherited variant.

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