35 results on '"Yıldırım, Mahmut Selman"'
Search Results
2. X Chromosome Pericentric Inversion: Report of a Case with 46,X,inv(X)(p11.2q26) and a Mini-Review of the Literature.
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Göktaş, Emine, Altındaş, Betül Okur, Zamani, Ayşe Gül, and Yıldırım, Mahmut Selman
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CHROMOSOME inversions ,X chromosome ,GENETIC counseling ,MEDICAL genetics ,CHROMOSOMES ,RECURRENT miscarriage - Abstract
Copyright of Gazi Medical Journal is the property of Galenos Yayinevi Tic. LTD. STI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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- View/download PDF
3. Determination of whole-genome expression differences in larynx cancers
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Göktaş, Emine, primary, Öztürk, Kayhan, additional, Zamani, Ayşe Gül, additional, and Yıldırım, Mahmut Selman, additional
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- 2023
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4. An Unusual Diagnostic Journey Through MLPA: From Spinal Muscular Atrophy to a Severe Case of Prader-Willi Syndrome.
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Göktaş, Emine, Altındaş, Betül Okur, Tarım, Hülya, Kayhan, Gülsüm, Zamani, Ayşe Gül, and Yıldırım, Mahmut Selman
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PRADER-Willi syndrome ,SPINAL muscular atrophy ,MUSCLE hypotonia ,HYPOGONADISM ,METHYLATION - Abstract
Background: Prader-Willi Syndrome (PWS) is a multisystemic disorder characterized by dysmorphic facies, hypotonia, developmental delay, cognitive impairment, hypogonadism, and obesity. It is caused by the absence of expression of paternally derived genes on chromosome 15. Here, we report the diagnostic journey of a case with severe neonatal hypotonia. Case Report: A neonatal patient was referred for the prediagnosis of spinal muscular atrophy (SMA). During the SMA Multiplex Ligation-dependent Probe Amplification (MLPA) analysis, a diminished signal of a reference probe on the 15q11.2 was revealed. Later, it was confirmed that she had a deletion confined to 15q11.2-q13.1, with a methylation pattern compatible with PWS. Conclusion: Since hypotonia might be the only finding in newborns with PWS, this case was presented to emphasize the importance of a comprehensive approach to such patients. [ABSTRACT FROM AUTHOR]
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- 2023
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5. The XRCC1 and TP53 gene polymorphisms are associated with advanced-stage disease and early distant metastasis at diagnosis in non-small cell lung cancer
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Karaağaç, Mustafa, primary, Geredeli, Çağlayan, additional, Yıldırım, Mahmut Selman, additional, Altınok, Tamer, additional, Dede, İsa, additional, İnal, Ali, additional, Zamani, Ayşe Gül, additional, Kaya, Buğra, additional, Demirkazık, Ahmet, additional, Bozcuk, Hakan, additional, and Artaç, Mehmet, additional
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- 2023
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6. Novel findings, mini‐review and dysmorphological characterization of 16p13.11 microduplication syndrome
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Arslan, Ahmet Burak, primary, Zamani, Ayşe Gül, additional, and Yıldırım, Mahmut Selman, additional
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- 2022
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7. Clinical Evidence of Crossover in the SHOX Gene
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Göktaş, Emine, primary and Yıldırım, Mahmut Selman, additional
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- 2021
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8. Interchromosomal effect: Report of a father and son, bearing different translocations of the same chromosome, and a review of the current literature
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Yıldırım, Mahmut Selman, primary, Arslan, Ahmet Burak, additional, and Zamani, Ayşe Gül, additional
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- 2020
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- View/download PDF
9. The Genetic Analysis of Cystic Fibrosis Patients with Seven Novel Mutations in the CFTR Gene in the Central Anatolian Region of Turkey.
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Erdoğan, Murat, Köse, Mehmet, Pekcan, Sevgi, Hangül, Melih, Balta, Burhan, Kiraz, Aslıhan, Gönen, Gizem Akıncı, Zamani, Ayşe Gül, Yıldırım, Mahmut Selman, Gürsoy, Tuğba Ramaslı, Ezgu, Fatih, Eyüpoğlu, Tuğba Şişmanlar, and Aslan, Ayse Tana
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CYSTIC fibrosis diagnosis ,GENETIC mutation ,HEALTH facilities ,SEQUENCE analysis ,CROSS-sectional method ,GENETIC testing ,POPULATION geography ,PEDIATRICS ,DEPARTMENTS ,CYSTIC fibrosis ,MEDICAL genetics ,PULMONOLOGY ,CHROMOSOME abnormalities ,DESCRIPTIVE statistics ,MEMBRANE proteins - Abstract
Background: Cystic fibrosis, a pulmonary disease which is an autosomal recessive, inherited, multisystemic genetic disease commonly seen in the Caucasian race, is the most frequent cause of mortality and morbidity. So far, more than 2000 disease-causing gene variants have been found and this number has been increasing with the studies conducted. Although there is not yet enough data that include the Turkish population, the recent increase of studies is noteworthy. Aims: To discover the genetic variation in patients diagnosed with cystic fibrosis in the Central Anatolian region. Study Design: Cross-sectional study. Methods: The study was carried out in the Central Anatolian region in 3 pediatric pulmonology departments (Kayseri, Konya, and Ankara) in Turkey between July 2014 and December 2017. The Sanger and Next Generation Sequence analyses were used for exon and exon--intron boundaries in the cystic fibrosis transmembrane conductance regulatory (CFTR) gene, and in selected patients, mutation analysis was performed using the Multiplex Ligation-dependent Probe Amplification technique for large deletions and duplications. Results: CFTR gene analysis was performed for 316 patients and 215 of them were genetically diagnosed with cystic fibrosis. Sixtythree different variants were defined in these patients and 7 of these were large deletions/duplications detected with the MLPA method. The most frequent variants were F508del (29.6%), G85E (8.2%), N1303K (8.2%), Y515* (7.5%), and G542* (3.4%). Conclusion: Using sequencing and Multiplex Ligation-dependent Probe Amplification methods, the identification of seven new mutations that were not previously reported in the literature contributes to a better understanding of the heterogeneous nature of CFTR mutations in the Turkish population. When no mutations are detected (pathogenic/probably pathogenic) in clinically compatible cases, Multiplex Ligationdependent Probe Amplification analysis contributes significantly to the diagnosis. [ABSTRACT FROM AUTHOR]
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- 2021
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- View/download PDF
10. A Special Chromosome Imbalance "Jumping translocation of 1q" in Burkitt Lymphoma.
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Turan, Betül, Göktaş, Emine, Zamani, Ayşe Gül, Tokgö, Hüseyin, and Yıldırım, Mahmut Selman
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BONE marrow examination ,CHROMOSOMES ,HEMATOLOGIC malignancies ,LYMPHOMAS ,BURKITT'S lymphoma - Abstract
Copyright of Gazi Medical Journal is the property of Galenos Yayinevi Tic. LTD. STI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
11. A Rare Combination of Mosaic Ring Y Chromosome and Shox Gene Deletion in an Infertile Male
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Başdemirci, Müşerref, Yıldırım, Mahmut Selman, Zamani, Ayşe Gül, Mahmut Selman Yıldırım: 0000-0002-3986-5517, Ayşe Gül Zamani: 0000-0003-0329-9047, and Necmettin Erbakan Üniversitesi Meram Tıp Fakültesi, Dahili Tıp Bilimleri Bölümü Tıbbi Genetik Anabilim Dalı
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Erkek infertilitesi ,Ring kromozom ,Male infertility ,Y chromosome ,Ring chromosome ,Gene deletion ,Gen delesyonu ,Y kromozomu - Abstract
Y kromozomunun yapısal anomalileri sıklıkla testiküler disfonksiyon ile ilişkilidir. Bu anomaliler Y kromozomunun uzun ya da kısa kolununun delesyonları, izokromozom Y, izodisentrik Y kromozomu, ve ring Y kromozomu olabilir. Ring Y kromozomuna sahip hastalar Turner sendromu, ambiguus genitalya, kısa boy, infertilite gibi birçok farklı fenotiple karşımıza çıkabilmektedir. SHOX (short stature homeobox-containing) geni X ve Y kromozomlarının psödootozomal 1 (PAR1) bölgelerinde yer alır ve bir kopyasında görülen fonksiyon kaybı boy kısalığı ile ilişkilidir. Bu çalışmada infertilite nedeniyle polikliniğimize başvuran ve konvansiyonel sitogenetik analiz sonucunda 46,X,r (Y)/45,X mozaikliği tespit edilen hastada, Y kromozomunda ring yapıya ek olarak SHOX geni delesyonunun nadir görülen birlikteliği sunulmuştur., Structural rearrangements of the Y chromosome are frequently associated with testicular dysfunction. These anomalies may be long or short arm deletions of Y chromosome, isochromosome Y, isodicentric Y chromosome, and ring Y chromosome. Patients with ring Y chromosome can present with many different phenotypes, such as Turner's Syndrome, ambiguous genitalia, short stature and infertility. The SHOX (short stature homeobox-containing) gene is located in the pseudoautosomal 1 (PAR 1) region of the X and Y chromosomes and loss of function of one copy is associated with short stature. In this study, we present a rare combination of SHOX gene deletion in addition to the ring structure of Y chromosome in a patient who was referred to our clinic with infertility and having 46,X,r (Y) /45,X mosaicism as a result of conventional cytogenetic analysis.
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- 2018
12. A Novel Pathogenic Variant of the CFTR Gene in a Patient with Cystic Fibrosis Phenotype—c.4096A > T
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Arslan, Ahmet Burak, additional, Zamani, Ayşe Gül, additional, Pekcan, Sevgi, additional, and Yıldırım, Mahmut Selman, additional
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- 2019
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13. Interchromosomal effect: Report of a father and son, bearing different translocations of the same chromosome, and a review of the current literature.
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Yıldırım, Mahmut Selman, Arslan, Ahmet Burak, and Zamani, Ayşe Gül
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FATHER-son relationship , *CHROMOSOMES , *CHROMOSOME segregation , *LITERATURE reviews , *KARYOTYPES - Abstract
Interchromosomal effect is a controversial phenomenon postulating that during gametogenesis of translocation carriers, aside from the unbalanced segregation of chromosomes involved in the translocation, other, structurally normal chromosomes might also be affected and segregated abnormally. Here, we present a balanced reciprocal translocation carrier t(15;20)(q11;p13), and his son, bearing a different translocation of chromosome 15, t(15;Y)(q11;q12). To further elucidate the so‐far‐controversial interchromosomal effect phenomenon, published original articles and case reports about interchromosomal effect were reviewed. The father was a carrier of t(15;20)(q11;p13). His wife's karyotype was normal. During a pregnancy occurred without any preceding procedure, amniocentesis was recommended to the family and performed. Result of the amniocentesis revealed a different translocation of chromosome 15; t(15;Y)(q11;q12). To our knowledge, this is the first report of two generations within a family, bearing different translocations of a chromosome. On top of all previous studies investigating ICE, our case adds an important finding, showing not only the rate of aneuploidies of structurally normal chromosomes, but also the rate of this 'alternating translocations' might be increased in translocation carriers, and this could be an important clue about interchromosomal effects. [ABSTRACT FROM AUTHOR]
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- 2021
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- View/download PDF
14. SHOX Genindeki Krossing Overın Klinik Kanıtı.
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Göktaş, Emine and Yıldırım, Mahmut Selman
- Abstract
Copyright of Van Tip Dergisi is the property of Yuzuncu Yil University, Faculty of Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2021
- Full Text
- View/download PDF
15. NAT2 Gene Polymorphisms in Turkish Patients with Psoriasis Vulgaris
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Dursun, Recep, primary, Dursun, Hatice Gül, additional, Zamani, Ayşe Gül, additional, Yıldırım, Mahmut Selman, additional, and Çınar, İlknur, additional
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- 2018
- Full Text
- View/download PDF
16. The Power of MLPA-NGS Coexistence in the Management of Charcot Marie Tooth Patients.
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Göktaş, Emine, Somuncu, Makbule Nihan, Zamani, Ayşe Gül, and Yıldırım, Mahmut Selman
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NUCLEOTIDE sequencing ,CHROMOSOME duplication ,MUSCULAR atrophy ,MUSCLE weakness ,TEETH ,LEBER'S hereditary optic atrophy ,POLYNEUROPATHIES - Abstract
Charcot Marie tooth (CMT) disease is an inherited motor and sensory neuropathies. Its prevalence is about 1/2500. Distal muscle weakness, muscle atrophy, loss of deep tendon reflexes, and foot deformities are expected findings. The findings are symmetrical, slowly progressive, and usually begin in the first decade. CMT can be inherited in an autosomal dominant, autosomal recessive, or X-linked manner. Duplications in the PMP22 gene are responsible for the etiology in more than half of CMT patients. Nearly 80 genes are responsible for the other half, the most common being PMP22, GJB1, MPZ, MFN2, GDAP1, HINT1, SH3CT2, SORD genes. Eight patients aged between 3-55 years were admitted to our center with complaints such as difficulty in walking, electromyography abnormalities, loss of sensation in the hands and feet. MLPA analysis and next generation sequencing (NGS) analysis were performed for the etiology of the patients. Unlike the literature, no duplication in the PMP22 gene was observed in our patients in MLPA; variants were detected in the gene panels of 4 of our patients. The variants are in the GJB1, MPZ, and ARHGEF10 genes. The c.397A>C:I127L homozygous variant in GJB1 gene detected in a 17-year-old male patient who presented with gait disturbance and motor and sensory polyneuropathy is novel. Although it is known that PMP22 gene duplications are frequently responsible for the etiology of CMT, all of our patients had normal MLPA and found responsible variants by NGS method; it emphasizes the importance of the technical combination of MLPA and NGS in the approach to CMT patients. [ABSTRACT FROM AUTHOR]
- Published
- 2024
17. Neuromuscular Diseases, Genetic Etiology and Next Generation Sequence Analysis.
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Somuncu, Makbule Nihan, Göktaş, Emine, Zamani, Ayşe Gül, and Yıldırım, Mahmut Selman
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NEUROMUSCULAR diseases ,CONGENITAL myasthenic syndromes ,SEQUENCE analysis ,AMYOTROPHIC lateral sclerosis ,DUCHENNE muscular dystrophy ,NEUROMUSCULAR transmission ,FACIOSCAPULOHUMERAL muscular dystrophy - Abstract
Introduction: Neuromuscular diseases (NMD) are characterized by the deterioration of muscles nerves building blocks of the movement system. Non-congenital acquired NMD may occur due to environmental factors, infections, side effects of various pharmacological treatments. On the other hand, gene variants that affect muscle-nerve structure function have a major role, which has a genetic or hereditary etiology. Methods: This study aims to investigate NMD using the next generation sequence (NGS) analysis method from patients who applied to the Department of Medical Genetics with the prediagnosis of neuromuscular involvement between the years 2020-2023. In our study, more than 200 NMD-related gene NGS methods were analyzed in twenty-four pre-diagnosed patients with NMD. Discussion: NMD is classified as anterior horn, peripheral nerve, neuromuscular junction and muscle diseases. In the classification, spinal muscular atrophy, amyotrophic lateral sclerosis, Guillain Barre syndrome, Charcot-Marie-Tooth, congenital myasthenic syndromes, muscular dystrophies are among the prominent ones. DNA sequence analysis is extremely important of NMD diagnosis algorithm of patients. Therefore, it becomes possible to perform NMH typing in such a wide spectrum and to target gene therapy with the detection of the variant, as in Duchenne muscular dystrophy. The novel variants will contribute to the development of differential diagnosis and treatment strategies, combination of clinic and genetic diagnosis will reveal the definitive diagnosis. Conclusion: NMH-related VUS, pathogenic variant was detected in patients in the study, a clinically compatible genetic diagnosis of the patients was determined. For variant zygosity and novel detected variants, segregation analysis was performed, genetic counseling was given for risky individuals and carriers in the family. [ABSTRACT FROM AUTHOR]
- Published
- 2024
18. Analysis of Parental Chromosome and QF-PCR from Abortus Materials in our Genetic Diagnosis Center: Assessment of Results in a Retrospective Manner.
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Çelebi, Dilek, Zamani, Ayşe Gül, and Yıldırım, Mahmut Selman
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CHROMOSOME analysis ,GENETIC disorder diagnosis ,MEDICAL genetics ,KLINEFELTER'S syndrome ,CHROMOSOME abnormalities - Abstract
Introduction: The aim of this study aims to determine as retrospectively analyze the results of the parental chromosomal analysis of the couples who pregnancy loss with QF-PCR analysis in patients who received abortion materials. Methods: In this study, 1,237 parents who karyotyping analyzed and QF-PCR analysis of 624 abortus materials at the department Meram Medical Faculty Medical Genetics Laboratory of Necmettin Erbakan University were evaluated between 2014-2018 retrospectively. Results:According to the results of our study; chromosomes anomaly was found in 11.8% of the QF-PCR analyzes. In these anomalies were 58.1% trisomy, 22.9% polyploidy, and 18.9% monozomy X. In family chromosome analysis findings, 97.1% of the parents have normal chromosomal organization, while 2.9% of them were abnormal. In the couples with chromosomal abnormalities; 0.6% variant, translocation carriers, 0.2% Turner syndrome, 0.2% Klinefelter syndrome (KS), 0.1% mosaicism, and 0.1% (Y) were detected. Conclusion: Genetic anomalies are important in the etiology of abortion and the trisomies are the most common anomalies in our study as compatible with the literature studies. On the other hand 3 cases were encountered that is KS in tha data that have the the parental chromosome analysis. We believe that the results obtained make a significant contribution to current information will help to especially in the population preventive medicine applications and studies to be done for genetic counseling. [ABSTRACT FROM AUTHOR]
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- 2024
19. Genetic Epilepsy and Molecular Diagnosis.
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Somuncu, Makbule Nihan, Göktaş, Emine, Yıldırım, Mahmut Selman, and Zamani, Ayşe Gül
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EPILEPSY ,DIAGNOSIS of epilepsy ,MOLECULAR diagnosis ,MEDICAL genetics ,GENETIC techniques ,GENETIC variation - Abstract
Introduction: Epilepsy is a neurodegenerative disease with phenotypic and genotypic heterogeneity. While a single gene mutation may be responsible for etiopathology, epilepsy types with familial inheritance or predisposition may also show complex inheritance together with environmental factors. In parallel with the development of molecular genetic techniques, epilepsy-related gene variants can be identified with next generation sequence (NGS), the inheritance of the disease can be revealed and genetic counseling can be given with risk assessment. Methods: This study aims to investigate the genetics of epilepsy using the NGS analysis method from patients who applied to the Department of Medical Genetics with a prediagnosis of epilepsy between the years 2020-2023. Early infantile epileptic/encephalopathy panels were studied through Minieq sequencing system. The pathogenicity classification of the detected variants over a hundred thirty patients was determined together with the clinical diagnosis. The segregation analyses were performed according to the zygosity, in line with their pedigrees. Discussion: Rapid advances in NGS have evolved to exciting results in epilepsy genetics. The combination of epilepsy-related gene panels and clinical tests has become more common, leading to more effective diagnoses, especially in early-onset epilepsy. This diagnostic algorithm sheds light on the pathophysiology of both early-onset benign and epileptic syndromes and devastating developmental and epileptic encephalopathies. Conclusion: Among the patients included in the study, variant classification was made according to pathogenicity scoring according to NGS results, and segregation was determined in patients with novel or homozygous variants. In line with the results, molecular genetic diagnosis and genetic epilepsy determination of the patients were revealed. [ABSTRACT FROM AUTHOR]
- Published
- 2024
20. Nijmegen Breakage Sendromlu Bir Olgunun Uzun Süreli izlemi
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Genç Yüzüak, Serap, primary, Göktürk, Bahar, additional, Hazar Sayar, Esra, additional, Yıldırım, Mahmut Selman, additional, and Reisli, İsmail, additional
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- 2017
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21. The role of MTHFR C677T and A1298C Polymorphysms in the Ethiopathogenesis of Diabetic Neuropathy
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Yıldırım, Mahmut Selman, Balasar, Mine, Mahmut Selman Yıldırım: 0000-0002-3986-5517, Mine Balasar: 0000-0002-5612-5238, and Necmettin Erbakan Üniversitesi, Meram Tıp Fakültesi, Dahili Tıp Bilimleri Bölümü, Tıbbi Genetik Anabilim Dalı
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Diabetic polyneuropathy ,Genetic polymorphism ,Diabetes Mellitus ,Pyrosequencing ,Diyabetik polinöropati ,Genetik polimorfizm - Abstract
Amaç: Bu çalışmada MTHFR geni C677T ve A1298C polimorfizmlerinin diyabetik periferik polinöropati patogenezine katkısı olup olmadığını araştırdık. Gereç ve Yöntem: Hasta grubu, Selçuk Üniversitesi Meram Tıp Fakültesi İç Hastalıkları Anabilim Dalı Endokrinoloji Polikliniğine başvuran, en az 10 yıldır Tip 2 DM tanısı nedeniyle takip edilen ve ENMG tetkiklerinde Diabetik Periferik Polinöropatisi olan 103 hastadan oluşturuldu. Kontrol grubu ise 2010 yılında Konya ilinde yaşayan rastgele seçilmiş 100 sağlıklı gönüllüden seçildi. Hasta ve kontrol grubundan yazılı onay alındıktan sonra kanları alındı. Pyrosequence tekniği ile MTHFR geni C677T ve A1298C polimorfizmleri araştırıldı. Bulgular: Araştırmamızda diyabetik nöropatili bireyler ile sağlıklı kontrol grubu karşılaştırıldığında MTHFR geni C677T ve A1298C polimorfizmlerinin genotip ve allel frekansları için istatistiksel olarak anlamlı bir farklılık bulunamadı. Bununla birlikte 2 ve daha fazla mutant alleli olan bireylerin, 1 ve daha az mutant alleli olan bireylerle karşılaştırıldığında diyabetik nöropati grubunda kontrol grubuna göre anlamlı bir şekilde (P 0.01) yüksek olduğu tespit edildi. Sonuç: Tip 2 DM hastalarında MTHFR geni C677T ve A1298C polimorfizmleri, polimorfik allel sayısı arttıkça diyabetik periferik polinöropati gelişimine yatkınlık sağlayabilir. Ancak diyabetik periferik polinöropatilerin poligenik doğası ve çevresel faktörlerden etkilenmesi, MTHFR gen polimorfizmlerinin tek başına etkisini ortaya koymayı zorlaştırmaktadır. Bu nedenle hasta ve kontrol gruplarının daha fazla sayıda olduğu, farklı etnik grupları içeren, çok merkezli daha geniş ölçekli araştırmalarla diyabetik periferik polinöropatilerin genetik nedenleri aydınlatılabilir., Objective: In this study, we investigated whether MTHFR gene C677T and A1298C polymorphisms contribute to the etiopathogenesis of diabetic peripheral neuropathies. Materials and Methods: The patients group was constituted 103 individuals with diabetic peripheral polyneuropathy diagnosed by electrophysiological techniques who were followed the diagnosis of type 2 DM at least 10 years at the Selçuk University Meram Medical School, Department of Internal Medicine. The control group was constituted 100 healthy volunteers randomly selected and living in Konya. Blood samples were collected after written consent from patients and control group. MTHFR gene C677T and A1298C polymorphisms was investigated using pyrosequence technique. Results: In our study, there was not found any statistically significant diffrences allele and genotype frequencies of MTHFR gene C677T and A1298C polymorphisms when patient and control groups were compared. Nevertheless, the number of individuals who had 2 or more the mutant allele in the patients group were significantly higher than the control group, compared with the number of individuals who had 1 and less than the mutant allele (P 0.01). Conclusion: As the number of polymorphic alleles of MTHFR gene C677T and A1298C polymorphisms in type 2 DM patients may predispose to the development of diabetic peripheral polyneuropathy. But, polygenic nature of diabetic peripheral polyneuropathy and influenced of environmental factors makes it difficult to reveal the effect of MTHFR gene polymorphisms in diabetic peripheral polyneuropathy. Thus the genetic causes of diabetic peripheral polyneuropathies may be elucidated by large-scale multi-center studies containing different ethnic groups and consisting of more individuals.
- Published
- 2015
22. A Novel Pathogenic Variant of the CFTR Gene in a Patient with Cystic Fibrosis Phenotype—c.4096A > T
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Arslan, Ahmet Burak, Zamani, Ayşe Gül, Pekcan, Sevgi, and Yıldırım, Mahmut Selman
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- 2020
- Full Text
- View/download PDF
23. Otozomal dominat geçişin görüldüğü ailesel 22q11.2 delesyon sendromu
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Göktürk, Bahar, primary, Gökdemir, Mahmut, additional, Reisli, İsmail, additional, and Yıldırım, Mahmut Selman, additional
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- 2016
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24. The Importance of triple test in prenatal diagnosis and MoM values according to gestational weeks
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Yıldırım, Mahmut Selman, Acar, Aynur, and Enstitüler, Sağlık Bilimleri Enstitüsü, Tıbbi Biyoloji Ana Bilim Dalı
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Prenatal tanı ,Triple test ,MoM values ,Prenatal diagnosis ,MoM değerleri ,Üçlü test - Abstract
Bu araştırmada Konya ilinde 16-20. gebelik haftalanndaki hamilelerde üçlü tarama testi için bir ortalama median değer (MoM-multiple of median) belirleyip, Down Sendromu ve Nöral Tüp Defektierinin prenatal olarak tanınmasına yardmıcı olmak amacıyla planlandı. Selçuk Üniversitesi Tıp Fakültesi Tıbbi Genetik Bilim dalı bünyesinde Mayıs 1997 - Aralık 1999 tarihleri arasında yürütülen bu çalışmaya, fakültemize ve Konya merkez sağlık ocaklarına başvuran toplam 92S hamile kadın dahil edildi. Hamile bayanların anamnezi alındıktan sonra uygun şartlar altında Selçuk Üniversitesi Tıp Fakültesi rutin Biyokimya laboratuvannda AFP, p hCG ve uE3 düzeyleri belirlendi. Çalışma grubuna dahil edilen tüm gebelerin 16.-20. gebelik haftalarında her üç analit için maternal serum düzeylerinin median değerleri hesaplandı. Bu değerler yaş ile kombine edilerek bireysel risk değerine ulaşıldı. Down sendromu riski 1/250 den düşük olan gebeler rutin gebelik takibine alındı. Down sendromu riski 1/250 den yüksek olanlara genetik danışma ve prenatal tam önerildi. Ayrıca kilo yüksekliği, 52 sigara kullanma alışkanlığı hamilelik sayısı, ve akrabalık durumunun üçlü teste etkileri gözden geçirildi Bulgularımıza göre kilo düzeyi yüksek olan hamile bayanlarda normal MoM değerlerine göre tüm haftalarda her üç değerde düşmektedir. Bu düşüş 17. haftada AFP ve uE3, 19.ve 20. haftada uE3 için istatiksel olarak anlamlı orana ulaşmaktadır Sigara içen hamileler ile sigara içmeyen normal ortalamaya sahip hamileler karşılaştırıldığında ise sigara içenlerde tüm haftalarda AFP değerinde hafif artış, p hCG ve uE3 değerlerinde ise azalış gözlenmektedir. uE3 deki düşüklük 18 haftada istatiksel olarak anlamlı orana ulaşmaktadır. Hamile bayanların gebelik haftaları ultrason sonuçlan ve son adet tarihine göre belirlendiğinde AFP değerlerinde istatiksel olarak anlamlı farklılıklar oluşmuştur. Hamilelik sayısının etkileri değerlendirildiğinde ise nullipar ve multiparlığın üçlü testte istatistiksel olarak anlamlı bir etkisinin olmadığı tespit edildi. Akrabalık durumunun üçlü test üzerine istatiksel olarak anlamlı bir etkisinin olmadığı da yapılan çalışmada anlaşılmıştır. Sonuç olarak, üçlü testin kolay ve ucuz olması, tüm toplumlarda NTD ve Down sendromu taramasında önemli bir gösterge olması, ayrıca defektlerin saptanması ve gebeliğin devamı hakkında fikir verebilmesi nedeniyle yaygın olarak kullanılması gereken noninvaziv bir test olduğu kanısına varılmıştır. 53 7. SUMMARY THE IMPORTANCE OF TRİPLE TEST IN PRENATAL DİAGNOSİS AND MoM VALUES ACCORDİNG TO GESTATIONAL WEEKS în this study, a MoM value were calculated for the triple test at 16-20 weeks of pregnancies. The aim of this investigation was to help diagnosis of Down syndrome and neural tube defect From May 1997 to december 1999, 925 pregnant women were evaluated. AFP, p hCG and uE3 levels were measured by biochemistry laboratuary of Selçuk Universty Medical Faculty. Median levels of these three analyt were calculated for 16-20 weeks of pregnancy These values were combined with age and individual risk values were determined. Pregnants with low Down syndrome risk (< 1/250 ) were observed routivneiy for pregnancy period. Genetic counsiling and prenatal diagnosis were suggested for pregnants with high Down syndrome risk (>l/250) İh addition high body weight, smoking, pregnancy number and consenquinity were compared with normal individuals. All of three test results were lower than normal MoM values in all weeks for pregnants with high body weight These values were istatisticaly significant for AFP and UE3 at 17 week and for uE3 at 19-20 weeks. When smoking and nonsmoking was compared, AFP levels were moderately high P hCG and uE3 lewels were moderately decreased. Decreasing uE3 levels were statistically significant at 18 week. 54 When pregnancy time were calculated according to last mensturation time, statisticaly significant differencies were observed in AFP levels. No differences were found between multiparity and nulliparity. Also it was understood that consenquinity was no effect on triple test As a result of this investigation triple test is acheupreliable and important tecnique for detection of NTD and Down syndrome and must be used generally.
- Published
- 2000
25. GAPO syndrome: Four new patients with congenital glaucoma and myelinated retinal nerve fiber layer
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Bozkurt, Banu, primary, Yıldırım, Mahmut Selman, additional, Okka, Mehmet, additional, and Bitirgen, Gülfidan, additional
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- 2013
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26. Micro-RNA-371a-3p in Germ Cell Testicular Tumors on Diagnosis: A Prospective Case-Control Study in Turkish Population.
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Kılınç, Muzaffer Tansel, Göger, Yunus Emre, Özkent, Mehmet Serkan, Kılıç, Özcan, Altındaş, Betül Okur, Yıldırım, Mahmut Selman, and Karalezli, Giray
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TURKS , *GERM cell tumors , *TUMOR diagnosis , *RECEIVER operating characteristic curves , *CASE-control method , *LONGITUDINAL method - Abstract
Purpose: We aimed to evaluate the diagnostic sensitivity and specificity of the miRNA-371a-3p for the primary diagnosis of germ cell tumors (GCT) and to investigate its relationship with pathological factors and clinical stage in the Turkish population. Materials and Methods: In this prospective study, a total of 60 patients with GCTs, and 40 healthy male controls were examined for serum levels of miRNA-371a-3p before orchiectomy and again two weeks after surgery. The miRNA-371a-3p, alpha-fetoprotein (AFP), and beta-human chorionic gonadotropin (bHCG) levels in the preoperative and postoperative periods were compared at different clinical stages. Receiver operating characteristics curve analyses were performed to determine the sensitivity and specificity of miRNA-371a-3p. Clinical and pathological factors such as clinical stage (CS), tumor size, histology, rete testis invasion, and lymphovascular invasion, potentially impacting miRNA-371a-3p expression levels (relative quantity, RQ), were evaluated statistically. Results: The sensitivity of miR-371a-3p in GCT patients was 98.3%, and the specificity was 95% (AUC = 0.997 [95%Cl:0.99–1], p < .001). miR-371a-3p expression was not detected in two patients with teratoma. The median miR-371a-3p RQ was 489 times in GCT and 2.2 times in the Control group (p < .001). In the postoperative period, there was a significant decrease in AFP and bHCG levels in all CS-1 (p = .01) and 30% of the other CS (p = .3). Throughout this time there was a decrease of 19 times at the miR-371a-3p RQ in CS-1(p < .001) and 1.6 times in the other CS (p < .001). The miR-371a-3p RQs were correlated with tumor size and CS. Conclusion: The miR-371a-3p seems to have higher diagnostic accuracy than classical serum tumor markers in GCT. [ABSTRACT FROM AUTHOR]
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- 2024
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27. Laboratuvarımızda düşük materyallerinden QF-PZR ve aile kromozom analizi sonuçlarının retrospektif olarak değerlendirilmesi
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Çelebi, Dilek, Yıldırım, Mahmut Selman, and Tıbbi Genetik Anabilim Dalı
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Retrospective studies ,Laboratories-hospital ,Karyotyping ,Genetics ,Trisomy ,Genetik ,Chromosome analysis ,Laboratories ,Chromosomes ,Polymerase chain reaction - Abstract
Amaç: Çalışmamız, düşük materyalleri alınan hastalarda QF PZR analizi ile düşük öyküsüne sahip aile kromozom analizi yapılan ebeveynlerin Karyotip Analizi dosyalarının retrospektif olarak taranmasını ve elde edilen bulguların değerlendirilmesini hedeflemektedir.Gereç ve Yöntem: Bu çalışmada 2014-2018 yılları arasında Konya Necmettin Erbakan Üniversitesi Meram Tıp Fakültesi Tıbbi Genetik Laboratuvarı'na gelen 624 düşük materyallerinin QF PZR analizi ve aile kromozom analizi yapılan 1237 ebeveynin sitogenetik verileri karyotip analizi yöntemi ile incelenmiştir. Taranan dosyalar SPSS veri analizi programında değerlendirildi.Bulgular: Çalışmamızda yapılan SPSS veri programı sonuçlarına göre; QF-PZR analizi yapılan düşük materyallerinin %11,8'inde anomali saptandı. Bu anomalilerin, %58,1 Trizomi, , %22,9 Poliploidi, %18,9 Monozomi X olarak bulundu. Aile kromozom analizi bulgularında ise ebeveynlerin %97,1'i normal kromozom kuruluşuna sahipken, %2,9'u anormal olarak değerlendirildi ve bu anormal olguların %1,7'sinde varyant, %0,6'sında Translokasyon taşıyıcısı, %0,2'sinde Turner Sendromu, %0,2'sinde Klinefelter Sendromu, %0,1'inde mosaisizm ve %0,1'inde inv(Y) tespit edildi.Sonuç: Düşük etiyolojisinde genetik anomaliler önemli bir yer tutmaktadır ve Trizomiler literatür çalışmaları ile uyumlu olarak bizim çalışmamamızda da en sık görülen anomalilerdir. Elde edilen verilerin özellikle Konya ili ve çevresi popülasyonunda önleyici hekimlik uygulamaları ve genetik danışma için yapılacak olan çalışmalar göz önüne alındığında önemli katkılar sağlayacağını düşünmekteyiz.Anahtar Sözcükler: Düşük; QF PZR; Karyotip Analizi; Trizomi Objective: The aim of this study aims to determine as retrospectively analyze the results of the family chromosomal analysis of the couples who pregnancy loss with QF PZR analysis in patients who received abortion materials.Material and Method: In this study, 1237 parents who karyotyping analyzed and QF PCR analysis of 624 abortus materials at the department Meram Medical Faculty Medical Genetics Laboratory of Necmettin Erbakan University were evaluated between 2014-2018 retrospectively. Data were analyzed by SPSS program.Results: According to the results of SPSS data program conducted in our study; chromosomes anomaly was found in 11.8% of the QF-PCR analyzes. In these anomalies were 58.1% Trisomy, 22.9% Polyploidy, and 18.9% Monozomy X. In family chromosome analysis findings, 97.1% of the parents have normal chromosomal organization, while 2.9% of them were abnormal. In the Couples with chromosomal abnormalities; 0.6% Variant, Translocation carriers, 0.2% Turner Syndrome, 0.2% Klinefelter Syndrome, 0.1% mosaicism and 0.1% (Y) were detected.Conclusion: Genetic anomalies are important in the etiology of abortion and the trisomies are the most common anomalies in our study as compatible with the literature studies. We believe that the results obtained make a significant contribution to current information will help to especially in the population of Konya considering preventive medicine applications and studies to be done for genetic counseling.Key words: Abortion; Karyotyped Analysis; QF PCR; Trisomy 70
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- 2019
28. Meme kanserli kadınlarda ttTTK gen ekspresyonunun önemi
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Şimşek, Evrim, Yıldırım, Mahmut Selman, Tıbbi Genetik Anabilim Dalı, Yıldırım, M. Selman, Danışman: 33778, and NEÜ, Sağlık Bilimleri Enstitüsü, Tıbbi Genetik Anabilim Dalı
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TTK Gene Expression ,Genes ,Neoplasms ,Breast Cancer ,RT-PCR ,Genetics ,Meme Kanseri ,Gene expression ,TTK Gen Ekspresyonu ,Genetik ,Breast neoplasms ,Polymerase chain reaction - Abstract
Yüksek Lisans Tezi., Meme kanseri kadınlarda en sık görülen kanser türüdür. Meme kanserleri etyolojisinde; cinsiyet, yaş, ırk, erken menarş, geç menapoz, ilk hamilelik yaşı, genetik yatkınlık değiştirilemeyen; sigara, alkol, obezite, fiziksel inaktivite, hormon replasman tedavisi ise değiştirilebilen faktörler arasında yer almaktadır. Meme kanseri; karakteristik moleküler özellikleri, prognoz ve tedaviye yanıtlarına göre heterojen gruplar oluşturmaktadır. Son yıllarda yapılan çalışmalarda, hücre döngüsünün düzenlenmesinde meydana gelen hasarların, meme kanseri ve diğer kanserlerin oluşmasındaki önemi vurgulanmaktadır. Hücre döngüsü biri G2/M geçişi, bir diğeri S fazına girmeden önceki geç G1 fazının da dahil olduğu nokta ve M kontrol noktası olmak üzere farklı aşamalarda denetlenmektedir. Bu denetim noktalarının her birinde, ilgili proteinlerce döngünün ilerlemesine veya durmasına karar verilmektedir. Bu kararların verilmesinin kontrolü, hedef proteinleri seçip fosforilize eden bir enzim ailesinden olan proteinkinazlar ve hücre döngüsünün işlerliğini kontrol eden siklin proteinleri tarafından yapılmaktadır. Hücre döngüsünün düzenlenmesinde meydana gelen aksaklıklar, meme kanseri ve diğer kanserlerin oluşmasında başlıca nedenler arasında gösterilmektedir. Meme kanserlerinde normal meme dokusuna göre daha fazla bulunan TTK geni (human protein kinase monopolar spindle 1 geni) çift fonksiyonlu kinaz ailesinden olup serine/thronine ve tirozin kinaz aktivitesi taşımaktadır. Günümüzde; meme kanserialtgruplarını, buna bağlı prognoz ve tedavi alacak hastaları belirlemede kullanılmaya başlanan genetik bilgiler, gelecekte meme kanserli hastalardaki moleküler olarak tarif edilen alt grupları için hedefe yönelik geliştirilecek ilaçlarla tedaviler gerçekleştirebileceği ve artmış TTK gen ekspresyonunun inhibisyonu ile meme kanserinin tedavisi üzerindeki çalışmalarda devam etmektedir. Bu çalışmada da, TTK geninin meme kanseri tanısı konan kadın hastaların, normal doku ve tümörlü doku ekspresyon miktarlarına bakıldı. Preparatlardan ışık mikroskopu ile normal ve tümörlü dokular işaretlendi. Parafin bloklardan kesitler alınarak RNA izolasyonu ve RT-PCR analizi yapıldı. Araştırmamız 30 meme kanserli kadın hasta üzerinde yürütüldü. Aynı hastanın, normal meme dokusu ile tümörlü meme dokusunda ekspre olan TTK gen miktarına bakıldı. İstatiksel olarak tümörlü dokuda ekspresyon miktarı normal dokuya göre daha fazla bulundu. Dolayısıyla meme kanseri üzerinde etkileri araştırılan TTK geninin, inhibisyonu yeni tedavi yaklaşımlarında rol oynayabileceği sonucuna varıldı. Ayrıca araştırmamız çok az miktarda yayınlanmış çalışmalarla benzer nitelikte olup literatürü desteklemektedir., Breast cancer is the most common type of cancer between women. In the etiology of breast cancers; sex, age, race, early menarche, late menopause, age of first pregnancy, genetic predisposition; smoking, alcohol, obesity, physical inactivity, hormone replacement therapy are among the factors that can be changed. The characteristic molecular characteristics of breast cancer constitute a heterogeneous group according to prognosis and treatment responses. In recent years studies have emphasized the importance of damage to the organization of cell cycle, breast cancer and other cancers. The cell cycle is controlled at different stages, one of which is the G2 / M transition, the other containing the late G1 phase before entering the S phase, and the M control point. At each of these control points, it is decided whether or not the protein of interest should progress or stop. The control of these decisions is made by protein kinases, an enzyme family that selects and phosphorylates target proteins, and Cyclin proteins, which control the functioning of the cell cycle. Disruptions in the organization of the cell cycle are among the main reasons for the development of breast cancer and other cancers. The TTK gene (human protein kinase monopolar spindle 1 gene), which is found more frequently in breast cancer than normal breast tissue, is a bifunctional kinase family carrying serine / throne and tyrosine kinase activity. Today; genetic information that has been used to determine breast cancer subgroups, the prognosis associated therewith and the patients receiving the treatment, and future targeted therapies for targeted molecular subtypes of patients with breast cancer. Studies on the treatment of breast cancer with the inhibition of increased TTK gene expression are also continuing. In this study, the amount of expression of normal tissue and tumor tissue in female patients who were diagnosed with breast cancer was examined. Normal and tumor tissues were marked by light microscopy from the preparations. Sections were taken from platelet blocks and RNA isolation and RT-PCR analysis were performed. Our study was conducted on a female patient with 30 breast cancer. The control group of the same patient looked at the amount of TTK gene that was expressed in normal breast tissues and tumor nipples. Statistically, the amount of expression in tumor tissue was found to be higher than in normal tissue. Therefore, the inhibition of TTK gene, which is investigating effects on breast cancer, has played a role in new therapeutic approaches. In addition, our research is similar in nature to published studies and supports the literature.
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- 2017
29. Larenks kanserlerinde tüm genom ekspresyon farklılığının belirlenmesi ve klinik önemi
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Göktaş, Emine, Yıldırım, Mahmut Selman, and Tıbbi Genetik Anabilim Dalı
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Neoplasms ,Genetics ,Microarray analysis ,Gene expression ,Genetik ,Laryngeal diseases ,Laryngeal neoplasms - Abstract
Amaç: Erişkin tümörlerinin %2'sini oluşturan larenks kanserleri, baş boyun bölgesinin en sıkgörülen malign tümörlerindendir. Türkiye'deki erkek ölümünün %7'sinden sorumlu olanlarenks kanserlerinin mortalite oranları oldukça yüksektir. Çalışmamızda larenks kanserlibireylerin tümör dokusunda normal dokuya göre ekspresyonu artan ya da azalan tüm genlerinbelirlenmesi amaçlanmıştır.Yöntem: Selçuk Üniversitesi Selçuklu Tıp Fakültesi ve Karatay Üniversitesi Tıp FakültesiKulak Burun Boğaz Polikliniği'ne başvuran, klinik ve histopatolojik olarak larenks kansertanısı almış 12 vakadan operasyon sırasında tümörlü ve sağlam taze doku örneklerialınarak(24 örnek) RNA izolasyonu yapıldı. Elde edilen RNA'lar tüm genom ekspresyonmikroarray yöntemi (Illumina iScan, HumanHT-12 V4 Expression Bead Chip) ile çalışıldı vetümörlü dokuda normal dokuya göre ekspresyonu anlamlı derecede artan ve azalan genlerbelirlendi.Bulgular: 47.323 prob kullanılarak yapılan çalışmada 14.294 mRNA'da normal dokuya göreekspresyon farklılığı saptandı. Ekspresyon farklılığının anlamlılığı için FC değeri 2 olarakkabul edildiğinde; 22 gende anlamlı ekspresyon artışı ve 2 gende anlamlı ekspresyon azalışıgözlendi. Etkilenen genlere yönelik yapılan yolak analizinde ise hücre siklus yolağı veekstrasellüler matriks yıkım yolağı aktivasyonu artan yolakların başında gelirken; elektrontransport zincir yolağı da baskılanan yolakların başında gelmekteydi.Sonuç: Tüm genom ekspresyon analizi ile larenks tümör etiyolojisinde rolü olduğu bilinen 13genin yanı sıra daha önce larenks kanserlerinde tanımlanmayan ancak vakalarımızın kanserlidokularında normal dokuya göre farklı eksprese olan 11 yeni gen tanımlanmıştır. İlk kezbizim çalışmamızda belirlenen bu genlerin larenks kanserli olgularda erken tanı, prognoztayini ve hedefe yönelik tedavi için biomarker olabileceği düşünülmektedir.Anahtar kelimeler: Ekspresyon, larenks kanseri, mikroarray Aim: Laryngeal cancers which constituting 2% of adult tumors are the most commonmalignant tumors of the head and neck region. The mortality rate of larynx cancers which isresponsible for around 7% of male deaths in Turkey is quite high. In our study, is aimed todetermine of decreasing or increasing the expression of all genes in the tumor tissue thannormal tissue in laryngeal cancer patients.Method: During surgery, tumor and normal tissue samples were taken from the 12 patientswho admitted to Selçuk University Selçuklu Medical Faculty and Karatay University MedicalFaculty and diagnosed larynx cancer as clinical and histopathological and RNA isolation wasperformed. Izolated RNA was studied by whole genome expression microarray method(Illumina iScan, HumanHT-12 V4 Expression Bead Chip) and gene were identified whichexpression significantly increasing and decreasing tumor tissue than in normal tissue.Findings:In study using 47,323 probe, expression differences revealed at 14.294 mRNA.When the FC value is considered to be 2 for the significance of the expression differences,increased expression of 22 genes and decreased expression of two genes were observed.While the cell cycle pathway and extracellular matrix degradation pathway are the most activepathway, electron transport chain pathway is one of the most repressed pathways according tothe pathway analysis of affected genes.Results:In our case, 11 new genes have been identified which is differentially expressed incancerous tissue compared to normal tissue in addition to 13 genes known to be involved inthe etiology of laryngeal tumors with whole genome expression analysis. These genes whichidentified for the first time in our study, are thought to be biomarker for early diagnosis,prognosis and targeted therapy on larynx cancer patients.Keywords: Expression, larynx cancer, microarray 108
- Published
- 2016
30. Pterjium dokusunda K-RAS mutasyonlarının bölgesel dizileme ile değerlendirilmesi
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Turğut Öztürk, Banu, Yıldırım, Mahmut Selman, Okka, Mehmet, and Tıbbi Genetik Anabilim Dalı
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Mutation ,Genetics ,DNA mutational analysis ,Genes-RAS ,Oncogenes ,Genetik ,Surgery-eye ,Pterygium ,Eye diseases - Abstract
Amaç: Uzun süreli ultraviyole ışığa maruziyetin tetiklediği bir çeşit benign proliferasyon olduğu düşünülen pterjium dokusunda bir onkogen olan K-ras mutasyonu sıklığının değerlendirilmesi Metot: Selçuk Üniversitesi Tıp Fakültesi Göz Hastalıkları A.D. 'da otogreft ile pterjium eksizyonu esnasında alınan pterjium ve normal doku örnekleri DNA izolasyonuna kadar -80°C'de saklandı. Çalışmanın diğer prosedürleri Konya Necmettin Erbalan Üniversitesi Tıbbi Genetik Anabilim Dalı'nda yürütüldü. Taze dokudan DNA izolasyonu `QIAamp DNA FFPE tissue kit` ile yapıldı. PCR ile DNA'nın K-ras geni kodon 12,13 ve 61 bölgelerini içeren dizileri amplifiye edildi.. Elde edilen ürünlerde `pyrosequence` sistemi kullanılarak K-ras kodon 12, kodon 13 ve kodon 61 'de mutasyon mevcudiyeti değerlendirildi. Bulgular: Çalışmada toplam 25 olgunun (10 kadın, 15 erkek) pterjium ve normal doku örnekleri değerlendirildi. Olguların yaş ortalaması 54.54±13.13'dü. Pterjium 18 olguda (% 72) korneayı 2-4 mm geçiyordu (tip 2), 7 olguda (% 28) ise korneayı 4 mm'den fazla (tip 3) geçiyordu. On beş olgunun (%60) bilateral pterjiumu mevcuttu. Pterjium tüm olgularda temporal lokalizasyondaydı ve hepsine ilk kez pterjium cerrahisi uygulandı. Yapılan analizde olguların normal dokularında K-ras mutasyonu saptanmazken, aynı bireylere ait pterjium dokularında Kodon 12'de 1 olguda, kodon 61'de 7 olguda mutasyon saptandı. Kodon 61'deki bu nokta mutasyonları 4 olguda glutamin ile arjinin (Glu61Arg CAA>CGA), 3 olguda ise glutamin ile lösin (Glu61Leu;CAA>CTA) şeklindeydi. Sonuç: Etiyopatogenezi halen tam olarak anlaşılamamış olan pterjium dokusunda K-ras geni 61. Kodonunda istatistiksel olarak anlamlı oranda mutasyon saptanması bu oluşumun benign bir tümöre benzer özellikler taşıdığı fikrini desteklemektedir. Aim: To evaluate the frequency of mutation of the oncogene K-ras in pterygium tissues which are claimed to be a benign proliferation triggered by prolonged exposure to ultraviolet radiation. Metot: Pterygium tissuses and normal conjunctiva tissue specimens obtained from patients who underwent pterygium excision with autogreft in Selçuk University Faculty of Medicine, Department of Ophthalmology, were stored at -80°C until DNA extraction. Following laboratory procedures were performed at Konya Necmettin Erbakan University Faculty of Medicine, Department of Medical Genetics. DNA extraction from fresh tissue was performed using the `QIAamp DNA FFPE tissue kit`. A PCR reaction was performed to amplify sequences containing codone 12, 13 and 61 in K-ras gene of the DNA. The PCR products were evaluated for K-ras mutation at codone 12, codone 13 and codone 61 with the `pyrosequence` method. Results: In the study pterygium and normal conjunctival tissue samples of 25 cases (10 female, 15 male) were evaluated. The mean age was 54.54±13.13'dü. Pterygium was exceeding the cornea 2-4 mm (type 2) in 18 cases (% 72), more than 4 mm (type 3) in 7 cases (% 28). Fifteen cases presented bilateral pterygium. All cases had pterygium on the temporal quadrant and underwent primary pterygium excision. The genetic analysis revealed lack of any K-ras mutation in normal conjunctival tissues, in contrast pteryigum tissues of the same cases demonstrated mutation at codone 12 in 1 case and mutation at codone 61 in 7 cases. The point mutations at codone 61 were glutamine to arginine (Glu61Arg CAA>CGA) in 4 cases and glutamine ile leucine (Glu61Leu;CAA>CTA) in 3 cases. .Conclusion: Though the pathogenesis of pterygium is already unknown the statistically significant mutation in K-ras gene at codone 61 supports the hypothesis being a benign tumor proliferation. 78
- Published
- 2015
31. Metiltetrahidrofolat redüktaz genindeki sık rastlanan polimorfizmlerin diyabetik nöropati etiyopatogenezindeki rolünün bölgesel dizi analizi tekniği ile tespiti
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Balasar, Mine, Yıldırım, Mahmut Selman, and Tıbbi Genetik Anabilim Dalı
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Diabetes mellitus-type 2 ,Genes ,Genetics ,DNA analysis ,Genetik ,Polymorphism-genetic ,Diabetic neuropathies - Abstract
Amaç: Bu çalışmada MTHFR geni C677T ve A1298C polimorfizmlerinin diyabetik periferik polinöropati patogenezine katkısı olup olmadığını araştırdık.Gereç ve Yöntem: Hasta grubu, Selçuk Üniversitesi Meram Tıp Fakültesi İç Hastalıkları Anabilimdalı Endokrinoloji Polikliniğine başvuran, en az 10 yıldır Tip 2 DM tanısı nedeniyle takip edilen ve ENMG tetkiklerinde Diabetik Periferik Polinöropatisi olan 103 hastadan oluşturuldu. Kontrol grubu ise 2010 yılında Konya ilinde yaşayan rastgele seçilmiş 100 sağlıklı gönüllüden seçildi. Hasta ve kontrol grubundan yazılı onay alındıktan sonra kanları alındı. Pyrosequence tekniği ile MTHFR geni C677T ve A1298C polimorfizmleri araştırıldı.Bulgular: Araştırmamızda diyabetik nöropatili bireyler ile sağlıklı kontrol grubu karşılaştırıldığında MTHFR geni C677T ve A1298C polimorfizmlerinin genotip ve allel frekansları için istatistiksel olarak anlamlı bir farklılık bulunamadı. Bununla birlikte 2 ve daha fazla mutant alleli olan bireylerin, 1 ve daha az mutant alleli olan bireylerle karşılaştırıldığında diyabetik nöropati grubunda kontrol grubuna göre anlamlı bir şekilde ( p=0.010) yüksek olduğu tespit edildi.Sonuç: Tip 2 DM hastalarında MTHFR geni C677T ve A1298C polimorfizmleri, polimorfik allel sayısı arttıkça diyabetik periferik polinöropati gelişimine yatkınlık sağlayabilir. Ancak diyabetik periferik polinöropatilerin poligenik doğası ve çevresel faktörlerden etkilenmesi, MTHFR gen polimorfizmlerinin tek başına etkisini ortaya koymayı zorlaştırmaktadır. Bu nedenle hasta ve kontrol gruplarının daha fazla sayıda olduğu, farklı etnik grupları içeren, çok merkezli daha geniş ölçekli araştırmalarla diyabetik periferik polinöropatilerin genetik nedenleri aydınlatılabilir.Anahtar sözcükler: Diabetes Mellitus; diyabetik polinöropati; genetik polimorfizm; Pyrosequencing. İnvestigation of the Role of Common Polymorphysms of Methyltetrahydrofolate Reductase Gene in the Etiopathogenesis of Diabetic Neuropathy by Pyrosequence TechniquePurpose: İn this study,we investigated whether MTHFR gene C677T and A1298C polymorphisms contribute to the etiopathogenesis of diabetic peripheral neuropathies.Methods: The patients group was constituted 103 individuals with diabetic peripheral polyneuropathy diagnosed by electrophysiological techniques who were followed the diagnosis of type 2 DM at least 10 years at the Selçuk University Meram Medical School, Department of İnternal Medicine. The control group was constituted 100 healthy volunteers randomly selected and living in Konya. Blood samples were collected after written consent from patients and control group. MTHFR gene C677T and A1298C polymorphisms was investigated using pyrosequence technique.Findings: İn our study, there was not found any statistically significant diffrences allele and genotype frequencies of MTHFR gene C677T and A1298C polymorphisms when patient and control groups were compared. Nevertheless, the number of individuals who has got 2 or more the mutant allele in the patients group were significantly higher than the control group, compared with the number of individuals who has got 1 and less than the mutant allele ( p=0.01).Conclusion: As the number of polymorphic alleles of MTHFR gene C677T and A1298C polymorphisms in type 2 DM patients may predispose to the development of diabetic peripheral polyneuropathy. But, polygenic nature of diabetic peripheral polyneuropathy and influenced of environmental factors makes it difficult to reveal the effect of MTHFR gene polymorphisms in diabetic peripheral polyneuropathy. Thus the genetic causes of diabetic peripheral polyneuropathies may be elucidated by large-scale multi-center studies containing different ethnic groups and consisting of more individuals.Key words: Diabetes Mellitus; diabetic polyneuropathy; genetic polymorphism; Pyrosequencing. 90
- Published
- 2012
32. Henoch schönlein purpuralı hastalarda eNOS gen polimorfizm araştırması
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Somuncu, Makbule Nihan, Yıldırım, Mahmut Selman, Enstitüler, Sağlık Bilimleri Enstitüsü, Tıbbi Genetik Ana Bilim Dalı, and Tıbbi Genetik Anabilim Dalı
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Vaskülit ,Vasculitis ,Polimorfizm-genetik ,Genetics ,Genetik ,Polymorphism-genetic - Abstract
Henoch Schönlein purpurası, çocukluk çağının en sık görülen vaskülitidir. Çoğunlukla küçük çaplı damarların etkilendiği HSP'de immün komplekslerin vasküler yapıda birikimi sonucu endotelial doku zarar görür. Başta cilt olmak üzere, eklem, böbrek ve gastrointestinal sistem tutulumu prognozu belirlemede büyük öneme sahiptir. Özellikle renal bulgular hastalığın prognozunu etkilemektedir. Yaklaşık olarak ikiyüzyıldır bilinen bu vasküler sendromun etiyolojisi halen tam olarak aydınlatılamamıştır. Ancak yaş, cinsiyet, çeşitli ilaçlar, çevresel ve genetik faktörler hastalığın oluşmasından sorumlu tutulabilmektedir. Yapılan moleküler çalışmalarda, bazı genlerin HSP fenotipinde etkili olabileceği ve kalıtımın, bu vaskülitin heterojen kliniğinde rol oynayabileceği gösterilmiştir. Bu çalışmada da, vasküler sistemdeki etkileri bilinen Nitrik Oksit Sentaz (NOS) geninin, endotel fonksiyonlarında büyük rolü olan eNOS izoformunda oldukça sık gözlenen Glu298Asp polimorfizminin HSP'li bireyler üzerindeki etkisi araştırılmıştır. Ayrıca mevcut çalışmada, hızlı PCR performansı, kapalı sistem kullanıldığı için kontaminasyon riskinin düşük olması ve sonuçların eş zaman diliminde elde edilebilme üstünlükleri nedeni ile Real Time PCR tekniği ve Light Cycler 2.0 sistemi tercih edilmiştir. Araştırmamız sonucunda, 95 HSP'li birey ile 93 kişilik kontrol grubu karşılaştırılmasında Glu298Asp polimorfizminin genotip ve allel frekansları için istatistiksel olarak anlamlı bir farklılık bulunamadı. Bununla birlikte, hasta grubunun cilt, eklem, GİS ve renal tutulumları için de polimorfizmin genotip ile allel frekanslarında kontrol grubuna göre istatistiksel olarak anlamlı bir fark yoktu. Ancak komplike tutulumlu ağır vakalarda polimorfizmin etkili olduğu tesbit edildi. Dolayısıyla Glu298Asp polimorfizminin HSP vaskülitinin oluşmasında bir etkisinin olmadığı ancak varolan hastalığın klinik seyrinde rol oynayabileceği sonucuna varıldı. Ayrıca araştırmamızdaki HSP'li bireylerin yaş ve cinsiyet bulguları da literatürle benzer nitelikte bulunmuştur., Henoch Schönlein purpura (HSP) is the most common vasculitis of childhood. When HSP occurs, from which most of time small vessels effected, endothelial tissue is destroyed as a result of accumulation of immun complexes. Firstly skin, then joint, gastrointestinal and kidney involvement have great importance for determining prognosis. Especially renal manifestations effect the clinic progress of the disease. The etiology of this vascular syndrome, known for two hundreds years, hasn?t been clarified yet. But age, sex, some medicines, enviromental and genetic factors can be counted amaung the reasons of this illness. In some molecular studies, it is indicated that some genes can have many affects on HSP phenotype, and heritage can play a role at the heterogeneity clinic of the vascülit. At this study, the effect of Glu298Asp polymorphism, observed especially at eNOS isoform, which has a big impact on endotel functions of NOS gene and known with its effects on vascular system, on individuals with HSP is researched. Also in the present study Real Time PCR technic and Light Cyler 2.0 system were preferred because of their fast PCR performance, their superiorities about getting the results synchronic, and since close system used the risk of contamination is low. As a result of our research, no significant difference between the genotype and allel frequencies of Glu298Asp polimorphism in the comparison of 95 individual with HSP and control group including 93 individual statistically. Beside this, no variation is recorded for skin, joint, gis and renal involvement of patient group at genotip and allel frequencies of polimorphism in comparison with control group. But at serious issues with complicated involvement it is found that polimorphism has an effect. Consequently, it is concluded that, Glu298Asp polymorphism has no effect on coming into being of HSP vasculitis but it can have an impact on the clinic progress of existing disease. Also, in our research the findings of age and sexuality of individuals with HSP have a similar quality with the literature.
- Published
- 2009
33. Comparison of MicroRNA Levels of 18-60-month-old Autistic Children with Those of Their Siblings and Controls.
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Karagöz H, Akça ÖF, Yıldırım MS, Zamani AG, and Oflaz MB
- Abstract
Objective: The present study aims to compare the levels of 7 microRNAs (mi-RNAs) (mi-RNA-125b, mi-RNA-23a-3p, mi-RNA-146a-5p, mi-RNA-106a, mi-RNA-151a-3p, mi-RNA-28, mi-RNA-125a) in the blood of the preschool children with autism and those of their siblings with healthy controls, and to investigate the association between these mi-RNAs and the severity of autism, behavioral problems, and siblings' autistic traits., Methods: A total of 35 children diagnosed with autism spectrum disorder (ASD) at the ages of 18-60 months (patient group), 35 non-affected siblings of the ASD group (sibling group), and 30 control subjects (control group) were involved in the study. The severity of ASD was measured using the Childhood Autism Rating Scale and the Autism Behavior Checklist (ABC). The behavioral problems of the children with ASD were assessed with the Aberrant Behavior Checklist, and the autistic traits of the siblings were assessed using the Autism spectrum screening scale for children., Results: mi-RNA-106a-5p, mi-RNA-151a-3p, and mi-RNA-28-3p were found to be expressed significantly lower in the patient group compared to the control group. There was a significant positive correlation between mi-RNA-23a and the sensory subscale of the ABC. mi-RNA-151a was significantly associated with sound sensitivity and mi-RNA-28 with echolalia. After controlling for age and sex, the differences between groups were disappeared., Conclusion: The present study examined mi-RNAs that have been reported as biomarkers in the literature. Although several symptom clusters are found to be related to certain mi-RNA expression levels, they were not found to be significant in discriminating the patient and healthy groups.
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- 2024
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34. Evaluation of immunological abnormalities in patients with rare syndromes.
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Gul Y, Kapaklı H, Aytekin SE, Guner ŞN, Keles S, Zamani AG, Yıldırım MS, and Reisli Ï
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Introduction: Recurrent infections are important problems in syndromic patients. This study aimed to evaluate immunological abnormalities in patients who presented with recurrent infections and were diagnosed with rare syndromes., Material and Methods: This retrospective analysis included 14 patients with complaints of recurrent infections, all of whom were diagnosed with a rare syndrome., Results: The study group consisted of patients with Aicardi syndrome, Brugada syndrome, Phelan- McDermid syndrome, trichothiodystrophy, LEOPARD syndrome, Prader-Willi syndrome, Seckel syndrome, trisomy 18 (Edwards' syndrome), Wiedemann-Steiner syndrome, West syndrome, Williams syndrome, 47,XYY syndrome, 16p13 deletion syndrome, and 13q1.3 deletion syndrome. Seven patients (50%) were girls and seven (50%) were boys (mean age, 56.7 ±32.9 months; median [range] age: 45.5 [27-153] months). There were high rates of consanguinity (50%), cesarean section delivery (71%), and hospitalization in the intensive care unit (78.5%). No patients had a family history of immunodeficiency. On admission, all patients exhibited humoral and/or cellular immune system abnormalities. During the follow-up period, all T-cell abnormalities were improved after immunoglobulin replacement therapy (IGRT), while B-cell abnormalities persisted. These findings suggested that the patients predominantly had antibody deficiencies associated with mild T-cell abnormalities because of recurrent infections. The rates of infections and hospitalizations were significantly reduced after IGRT (p < 0.001); the rate of intensive care unit admission also significantly decreased (from 78.5% to 21.4%). Two of the three oxygen-dependent patients exhibited improvement therein. IGRT was discontinued in two patients with significant clinical improvement during follow-up., Conclusions: An immunological evaluation should be considered in pediatric patients with rare syndromes and recurrent infections. IGRT may help to improve the prognoses of these patients., Competing Interests: The authors declare no conflict of interest., (Copyright © 2022 Termedia.)
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- 2022
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35. Investigation of the relationship between ischemic stroke and endothelial nitric oxide synthase gene polymorphisms [G894T, intron 4 VNTR and T786C]
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Anlıaçık SÖ, Tokgöz S, Zamani AG, Yıldırım MS, and İyisoy MS
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- Aged, Aged, 80 and over, Brain Ischemia enzymology, Brain Ischemia physiopathology, Case-Control Studies, Female, Gene Frequency, Genetic Association Studies, Humans, Male, Minisatellite Repeats genetics, Stroke enzymology, Stroke physiopathology, Brain Ischemia genetics, Genetic Predisposition to Disease genetics, Introns genetics, Nitric Oxide Synthase Type III genetics, Polymorphism, Single Nucleotide, Stroke genetics
- Abstract
Background/aim: We aimed to investigate the associations between endothelial nitric oxide synthase(eNOS) gene polymorphisms [G894T (rs1799983)], intron 4 (27-bpTR) variable number tandem repeat (VNTR) and T786C (rs2070744), and ischemic stroke in the Anatolian population., Materials and Methods: This case-control study included 112 patients with “stroke of undetermined etiology” and 160 controls. Real-time polymerase chain reaction (RT-PCR) analysis was used to analyze these polymorphisms. Between-group frequencies of alleles and genotypes were compared using binary logistic regression analysis., Results: No significant difference was observed between the two groups in terms of the genotype and allele distributions of the eNOS G894T (rs1799983) polymorphism (P > 0.05). The a alleles and the 4b/a and 4a/a genotypes of the intron 4 (27-bpTR) VNTR polymorphism had significantly higher frequencies in the patient group than in the control group (OR: 2.715, P < 0.001; OR: 3.396, P < 0.001; OR: 10.631, P = 0.016, respectively). On the contrary, the TC genotype and C alleles of the T786C (rs2070744) polymorphism had a significantly lower frequency in the patient group than in the control group (OR: 0.244, P < 0.001, OR: 0.605, P = 0.006, respectively), Conclusion: Our findings indicate that the eNOS G894T and T786C [rs2070744] polymorphisms are not associated with the risk of ischemic stroke, whereas the intron 4 [27-bpTR] VNTR may be a risk factor in the Anatolian population.
- Published
- 2019
- Full Text
- View/download PDF
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