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    Familial mediterranean fever in children from the Aegean region of Turkey: Gene mutation frequencies and phenotype–genotype correlation
    (Turkiye Klinikleri Journal of Medical Sciences, 2015) Yilmaz E.; Dinçel N.; Sözeri B.; Özdemir K.; Kaplan Bulut İ.; Berdeli A.; Mir M.S.
    Background/aim: Familial Mediterranean fever (FMF) is diagnosed by fever episodes with sterile peritonitis, arthritis, pleurisy, and erysipelas-like erythema. The relationship between phenotype and genotype in FMF has not been adequately explained. The aim of this study was to characterize the phenotype and genotype correlation in FMF. Materials and methods: Clinical diagnosis of FMF was conducted according to the Tel Hashomer criteria. Pras scoring was used to determine clinical severity. FMF strip assay analysis was used, and the hotspot regions were observed with PCR amplification and automatic DNA sequence analysis method. Results: We showed commonly seen mutations (most frequently M694V) in a study group of 191 patients. The disease severity score of patients with M694V mutation was high on the Pras scoring system. Patients with M694V mutation needed high colchicine dosages to control disease activity. R202Q was the most commonly seen polymorphism in 70 patients. The coexpression of R314R single nucleotide polymorphism on third exon was shown in our study. Moreover, D102D, G138G, and A165A subhaplotypes and E474E, Q476Q, and D510D subhaplotypes were also shown. Conclusion: DNA sequence analysis should be a commonly used method for progress in the field of molecular genetics and for the better understanding of the FMF phenotype and genotype relationships in all populations. © TÜBİTAK.
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    Genotypic and phenotypic features of both nphs1 and nphs2 genes in infantile nephrotic syndrome and prognostic effect of e117k polymorphism in NPHS1 gene
    (Kowsar Medical Publishing Company, 2019) Yılmaz E.; Dinçel N.; Bulut İ.K.; Berdeli A.; Mir S.
    Background: Infantile nephrotic syndrome (INS) refers to disease that is present after the first three months of life up to one year of age. There is genetic heterogeneity and genotype-phenotype correlation is not clear. Objectives: The focus of the present study was to analyze genotypic and phenotypic features of both NPHS1 and NPHS2 genes in INS. Methods: Clinical data, mutational analysis, histology, treatments, and outcomes of 48 children with NS are evaluated. A direct sequencing of NPHS1 gene and NPHS2 gene was performed. Patients were classified into 3 groups; group 1: cases having only NPHS1 mutation; group 2: cases with only NPHS2 mutation; group 3: cases without any mutation. Results: The mean age at onset of the disease was 8.7 ± 2.3 months, and mean follow-up time was 8.3 years. Seven familial and 41 sporadic cases of INS were found. Kidney biopsy was performed in 45 out of 48 patients and pathological investigations revealed focal segmental glomerulosclerosis in 29 (65%), IgM nephropathy in 6 (13%), and minimal change disease in 10 patients (22%). There were 5 (10.4%) cases in group 1 (patients having only mutations of NPHS1) and 13 cases (27%) in group 2 (patients having only mutations of NPHS2). Thirty cases (62.5%) had neither NPHS1 nor NPHS2 mutation (group 3). Conclusions: The genotypic and phenotypic features of INS were demonstrated. We found that INS with podocin mutation has poor prognosis according to exonal distribution. NPHS1 mutations caused a severe disease but with a more favorable prognosis. © 2019, Author(s).