2018, Number 2
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Rev Invest Clin 2018; 70 (2)
Association of Intron-2 Variable Numbers of an 86-bp Tandem Repeat- Polymorphisms of Interleukin-1 Receptor Antagonist Gene and Idiopathic Recurrent Spontaneous Abortion
Avila-Vergara MA, Peraza-Garay FJ, Meraz-Cruz N, Hernandez-Guerrero C, Palacios-Gonzalez B, Vadillo-Ortega F
Language: English
References: 44
Page: 96-102
PDF size: 105.33 Kb.
ABSTRACT
Background: It has been proposed that abnormal modulation of inflammatory response is involved in the physiopathology of
idiopathic recurrent spontaneous abortion (iRSA). Factors that may participate in this process include the genetic background
such as carrying specific polymorphisms of genes with functional effects.
Objective: The objective is to study the association
between iRSA and the frequency of intron-2 variable number tandem repeat-polymorphisms of interleukin-1 receptor antagonist
gene (
IL1RN).
Methods: We conducted a case–control study including 108 women with iRSA and 103 controls. Five allelic
variants of IL1RN were determined by polymerase chain reaction (PCR) product length analysis.
Results: The most frequent
IL1RN allele in this population was
IL1RN*1, which was present in 78% of cases and 94% of controls, and allele
IL1RN*2, in
45 (20.8%) cases and 12 (5.8%) controls. Allele
IL1RN*2 was significantly associated with iRSA (odds ratio = 4.28, 95%
confidence interval 2.2-8.4; p = 0.000).
Conclusion: Carrying allele
IL1RN*2 had a strong association with iRSA in Mexican
women. This polymorphism codifies for a low-function protein, which may allow for increased activity of IL-1 pro-inflammatory
axis in iRSA.
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