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. 2021 Dec 9;12:769187. doi: 10.3389/fendo.2021.769187

Table 5.

Clinical and genetic parameters assessed with the screening test Pill Protect®.

Clinical variables Age
BMI
Smoking habits
Family history of VTE
Genetic variables Gene: F5
    -SNP: rs6025
    Allele: A
Gene encoding for coagulation factor V.
The resulting re6025(A) allele is known as Factor V Leiden mutation which leads to a resistance to the activated protein C and an increased risk of thrombosis (114).
Gene: F2
    -SNP: rs1799963
    Allele: A
Gene encoding for prothrombin.
The resulting rs199963(A) allele is known as G20210A mutation which leads to increased plasma prothrombin levels and an increased risk of thrombosis (114).
Gene: ABO
    -SNP: rs8176719
    Allele: G
    -SNP: rs8176750
    Allele: C
Gene encoding for ABO subtype.
The rs8176719(G) and rs8176750(C) alleles encodes for non-O blood groups and are associated with an increased risk of VTE through modifications of von Willebrand Factor (VWF) and factor VIII (FVIII) plasma levels (115).
Gene: F11
    -SNP: rs2289252
    Allele: T
Gene encoding for coagulation factor XI.
The rs2289252(T) allele is associated with increased FXI activity leading to a procoagulable state (115).
Gene: CYP2C9
    -SNP: rs1799853
    Allele: T
Gene encoding for cytochrome CYP2C9 involved in the metabolism of EE.
The rs1799853(T) allele could induce a decrease in the metabolism of EE, thus increasing its plasma levels and therefore the global estrogenicity (114).
Gene: PROCR
    -SNP: rs9574
    Allele: G
Gene encoding for activated protein C receptor involved in the activation of the anticoagulant pathway. The rs9574(G) allele has been reported to be at increased risk of VTE compared to C allele (115).
Gene: SUGCT
    -SNP: rs4379368
    Allele: T
Gene encoding for the succinate-hydroxymethylglutarate CoA-transferase.
The rs4379368(T) allele has been associated with migraine susceptibility. The combination of both migraine and COC could further increase the risk of cardiovascular diseases (116).
Gene: KNG1
    -SNP: rs710446
    Allele: C
Gene encoding for kininogen-1. This protein plays an important role in the coagulation process by assembling the kallikrein-kinin system. The rs710446(C) allele has been associated with shortened aPTT levels and an increased risk of VTE (117).

BMI, Body Mass Index; SNP, single nucleotide polymorphism; VTE, venous thromboembolism.