Browsing by Author "Yildirim, Ibrahim Halil"

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The Prevalence of "mefv" Gene Mutations in Rheumatoid Arthritis Patients Inhabiting the Van Province and Surroundings
(Baycinar Medical Publ-baycinar Tibbi Yayincilik, 2014) Ozkol, Halil; Yildirim, Ibrahim Halil; Tuluce, Yasin; Ediz, Levent; Delen, Veysel; Gulcu, Elif
Objective: An inhibitory protein of inflammation pyrin/marenostrin is encoded by the Mediterranean fever (MEFV) gene. Mutations of this gene are known to cause familial Mediterranean fever (FMF) disease. A relation between mutations of the MEFV gene and rheumatic diseases was also suggested. The aim of the present study was to investigate the frequency of four common mutations of the MEFV gene in 110 rheumatoid arthritis (RA) patients and 98 healthy controls (HC) inhabiting a region of eastern Turkey. Material and Methods: DNA extraction was realized by salting out method from peripheral blood lymphocytes of all subjects included in the study. Polymerase chain reactions (PCR) amplification of exon 10 was performed by the appropriate primers, and single-nucleotide polymorphisms (SNPs) were detected by specific restriction endonucleases recognizing the mutational DNA or wild-type DNA regions. Results: Mutation frequency of RA patients was higher than in HC, but this result was not statistically significant (p>0.05). Conclusion: The MEFV mutation rate of RA patients living in eastern Turkey was not significantly different from HC. Further studies are needed to investigate other gene mutations that may affect RA etiopathogenesis.
Single-Strand Conformation Polymorphism-Based Genetic Characterization of the Cyclospora Cayetanensis Strains Collected From Different Provinces in Turkey
(inst Agricultural Medicine, 2021) Cicek, Muttalip; Yildirim, Ibrahim Halil; Cengiz, Zeynep Tas; Karaman, Ulku
Introduction and objective. Cyclospora cayetanensis, a coccidian protozoan species, has been recently found to cause diarrhea in all age groups in immunocompetent and immunocompromised individuals in most regions of the world. This study aimed to conduct the molecular detection of C. cayetanensis and to determine the genetic diversity of the 18S ribosomal RNA (rRNA) gene sequence of C. cayetanensis isolated from individuals living in different provinces in Turkey by using PCR-single-strand conformation polymorphism (SSCP). Materials and method. A total of 22 subjects were included in the study. Fourteen of the subjects were female and eight were male, with ages ranging between 7-65 years. Stool specimens were examined using wet mount and modified acid-fast staining methods, which revealed the presence of oocysts in the samples. The 18S rRNA ITS-1 Ccits37f-GCTTGCTATGTTTTAGCATGTGG and Ccits501r-GCACAATGAATGCACACACA gene regions were used as primers. The PCR products were analyzed by agarose gel electrophoresis and visualized on a UV transilluminator. For the SSCP, the PCR products were denatured with formamide, run for 16 h in 6% (49:1) polyacrylamide gel, and then imaged with silver staining. Results. SSCP assay was performed given that the DNA strands demonstrated different folds; the DNA strands contain different nucleotides based on the PCR-SSCP results for the Cyclospora strains collected in 4 provinces. Moreover, 3 different band profiles were observed in the investigated samples. A slight mutation difference was observed among the strains collected. Conclusions. Further comprehensive studies involving more C. cayetanensis-positive specimens and utilizing different mutation screening methods are warranted to demonstrate mutation differences in Cyclopora strains in Turkey.