RESUMO
Abstract Aim: Various mutations have been identified in the Mediterranean fever (MEFV) gene which is reported to be responsible from Familial Mediterranean fever (FMF). In our study, we aimed to determine the frequency of the MEFV mutations in our region and to investigate the impact of G138G (rs224224, c.414A>G) and A165A (rs224223, c.495C>A) gene polymorphisms on the clinical findings of the disease. Methods: One hundred and sixteen patients diagnosed with FMF and 95 control subjects were included in this study. We used the DNA sequence analysis method to identify the most prevailing 10 mutations located in exon 2 and 10 of MEFV gene. Results: As a result of the MEFV mutation analysis, the most common mutation was the M694V mutation allele with a frequency rate of 41.8%. When the patients group and control group were compared in terms of frequency of both polymorphic alleles (G polymorphic allele, observed in G138G and the A polymorphic allele, observed in A165A), the variation was observed to be statistically significant (p < 0.001). It was found that the MEFV mutation types have no relation with clinical findings and amyloidosis (p > 0.05). Conclusions: To our knowledge, our study is the first study in the Southern Marmara region that reports the frequency of MEFV mutations. Our findings imply that the polymorphisms of G138G and A165A may have an impact on progress of the disease. We think that more studies, having higher number of cases and investigating the polymorphisms of MEFV gene, are needed.
Resumo Objetivo: Identificaram-se mutações no gene da febre mediterrânica (MEFV) relatadas como responsáveis pela febre mediterrânica familiar (FMF). Este estudo teve como objetivo determinar a frequência de mutações no MEFV na região sul do mar de Mármara e investigar o impacto dos polimorfismos genéticos G138G (rs224224, c.414A > G) e A165A (rs224223, c.495C > A) nos achados clínicos da doença. Métodos: Foram incluídos neste estudo 116 pacientes com diagnóstico de FMF e 95 indivíduos no grupo controle. Usou-se o método de análise da sequência de DNA para identificar as 10 mutações mais prevalentes localizadas nos éxons 2 e 10 do gene MEFV. Resultados: Como resultado da análise da mutação MEFV, a mutação mais comum foi a mutação alélica M694 V, com uma taxa de frequência de 41,8%. Quando os grupos de pacientes e controles foram comparados em termos de frequência de ambos os alelos polimórficos (alelo polimórfico G, observado no G138G e o alelo polimórfico A, observado no A165A), a variação observada foi estatisticamente significativa (p < 0,001). Verificou-se que os tipos de mutação no MEFV não tinham relação com os achados clínicos nem com a amiloidose (p > 0,05). Conclusões: Que se tem conhecimento, este estudo é o primeiro feito na região sul do mar de Mármara que relata a frequência de mutações no MEFV. Os achados indicam que os polimorfismos G138G e A165A podem ter um impacto sobre o progresso da doença. Acredita-se que são necessários mais estudos que abranjam um maior número de casos e investiguem os polimorfismos do gene MEFV.
Assuntos
Humanos , Adulto , Idoso , Adulto Jovem , Febre Familiar do Mediterrâneo/genética , Pirina/sangue , Mutação , Febre Familiar do Mediterrâneo/sangue , Polimorfismo Genético , Turquia , Estudos de Casos e Controles , Reação em Cadeia da Polimerase , Estudos Retrospectivos , Alelos , Frequência do Gene , Pessoa de Meia-IdadeRESUMO
AIM: Various mutations have been identified in the Mediterranean fever (MEFV) gene which is reported to be responsible from Familial Mediterranean fever (FMF). In our study, we aimed to determine the frequency of the MEFV mutations in our region and to investigate the impact of G138G (rs224224, c.414A>G) and A165A (rs224223, c.495C>A) gene polymorphisms on the clinical findings of the disease. METHODS: One hundred and sixteen patients diagnosed with FMF and 95 control subjects were included in this study. We used the DNA sequence analysis method to identify the most prevailing 10 mutations located in exon 2 and 10 of MEFV gene. RESULTS: As a result of the MEFV mutation analysis, the most common mutation was the M694V mutation allele with a frequency rate of 41.8%. When the patients group and control group were compared in terms of frequency of both polymorphic alleles (G polymorphic allele, observed in G138G and the A polymorphic allele, observed in A165A), the variation was observed to be statistically significant (p<0.001). It was found that the MEFV mutation types have no relation with clinical findings and amyloidosis (p>0.05). CONCLUSIONS: To our knowledge, our study is the first study in the Southern Marmara region that reports the frequency of MEFV mutations. Our findings imply that the polymorphisms of G138G and A165A may have an impact on progress of the disease. We think that more studies, having higher number of cases and investigating the polymorphisms of MEFV gene, are needed.