J Periodontal Implant Sci.  2014 Jun;44(3):141-146. 10.5051/jpis.2014.44.3.141.

Receptor activator of nuclear factor kappa-B gene polymorphisms in Iranian periodontitis and peri-implantitis patients

• Kadkhodazadeh M
• Baghani Z
• Ebadian AR
• Kaghazchi
• Amid R

• KMID: 2012989
• DOI: http://doi.org/10.5051/jpis.2014.44.3.141

Abstract

PURPOSE
Peri-implantitis and periodontitis are inflammatory and infectious diseases of implant and tooth-supporting tissues. Recently, the role of gene polymorphisms of immune response components in the relevant pathogenesis has been investigated. The present study was the first to evaluate the relationship between two known single nucleotide polymorphisms (SNPs) of the receptor activator of nuclear factor kappa-beta (RANK) gene (rs3018362 and rs35211496) in chronic periodontitis and peri-implantitis patients in an Iranian population.
METHODS
Eighty-one periodontally healthy patients, 38 patients with peri-implantitis, and 74 patients with chronic periodontitis were enrolled in this study. DNA was extracted from blood arm vein samples by using Miller's salting out technique according to the manufacturer's instructions given in the extraction kit. The concentration of DNA samples was measured using a spectrophotometer. The genetic polymorphisms of the RANK gene were evaluated using a competitive allele specific polymerase chain reaction (KBioscience allele specific PCR) technique. Differences in the frequencies of genotypes and alleles in the diseased and healthy groups were analyzed using chi-squared statistical tests (P<0.05).
RESULTS
Analysis of rs35211496 revealed statistically significant differences in the expression of the TT, TC, and CC genotypes among the three groups (P=0.00). No statistically significant difference was detected in this respect between the control group and the chronic periodontitis group. The expression of the GG, GA, and AA genotypes and allele frequencies (rs3018362) showed no statistically significant difference among the three groups (P=0.21).
CONCLUSIONS
The results of this study indicate that the CC genotype of the rs35211496 RANK gene polymorphism was significantly associated with peri-implantitis and may be considered a genetic determinant for peri-implantitis, but this needs to be confirmed by further studies in other populations.

Keyword

Genetic polymorphism; Peri-implantitis; Periodontitis; Receptor activator of nuclear factor-kappa B

MeSH Terms

Alleles
Arm
Chronic Periodontitis
Communicable Diseases
DNA
Gene Frequency
Genotype
Humans
Peri-Implantitis*
Periodontitis*
Polymerase Chain Reaction
Polymorphism, Genetic
Polymorphism, Single Nucleotide
Receptor Activator of Nuclear Factor-kappa B
Veins
DNA
Receptor Activator of Nuclear Factor-kappa B

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