Resumen

HIDROBO-ORTIZ, R et al. Characterization of a sample Chilean patients with periodontitis and frequency of H131R polymorphism in the FcγRIIa receptor. Rev. Clin. Periodoncia Implantol. Rehabil. Oral [online]. 2018, vol.11, n.2, pp.84-90. ISSN 0719-0107.  http://dx.doi.org/10.4067/S0719-01072018000200084.

The Fcγ receptors (FcγR) specific for the immunoglobulin G, expresses for the immune inflammatory response function. The inter individual heterogeneity in the efficiency of the FcγR function has been explained by polymorphisms in genes that encode for 3 of these receptors, FcγRIIa, FcγRIIIa and FcγRIIIb, which have been associated with susceptibility or severity in autoimmune and infectious diseases in different populations. This paper discusses the clinical characteristics of 94 Chilean patients with evidence of periodontal damage and establishes the allelic/genotypic frequency of polymorphism H131R in the FCGR2A gene, which encodes for the receptor FcγRIIa, as well as their possible association with periodontitis. Polymorphism G>A (H131R) in the gene FCGR2A was studied via real time PCR using TaqMan probes. In the study group, a high percentage of patients with periodontitis was found (86, 2%) with a significant association with age and gender. No determination could be reached as to whether the allele H or R or the genotypes found (H/R and R/R) were a factor of genetic susceptibility.

This is the first study to determine the polymorphisms of the FcγR gene in a Chilean population adequately characterized; nevertheless, we believe that it is necessary to study a greater number of subjects in order to determine if the polymorphisms of the FcγR gene are a possible factors of susceptibility to periodontal disease in the Chilean population.

Palabras clave : R131H polymorphism; Periodontitis; FCGR2A.

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