Publications by authors named "Mahmut Selman Yıldırım"

Objective: To determine the coexistence of multiple PML-RARA transcripts in adult APL (acute promyelotic leukaemia) patients, and its impact on  the patients' laboratory parameters, treatment responses, and prognoses.

Study Design: Cross-sectional study. Place and Duration of the Study: Department of Medical Genetics, Medical Faculty of Necmettin Erbakan University, Konya, Turkiye, from January 2015 to March 2023.

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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.

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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).

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Background: Studies on single nucleotide polymorphisms (SNPs) in non-small cell lung cancer (NSCLC) suggest that DNA repair capacity may have prognostic implications for disease recurrence and survival. However, there is no study investigating the relationship between SNPs and the risk of metastasis at the time of initial diagnosis in patients with NSCLC.

Objective: This study aimed to investigate the potential predictive value of SNPs in detecting the risk of metastasis at the time of initial diagnosis and poor prognosis in patients with NSCLC.

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Purpose: It is known that the RAS and BRAF mutations are predictive for targeted therapies in treating metastatic colon cancer and negatively affect the prognosis of the disease. However, there are limited studies in early-stage colon cancer about the relationship of this mutational condition with the prognosis and relapse pattern of the disease. In this study, we evaluated the effects of mutational status on the clinical pattern of recurrence and survival in early-stage colon cancer in addition to classical risk factors.

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Article Synopsis
  • * Results showed that half of the patients had improved T-cell function after receiving immunoglobulin replacement therapy (IGRT), while B-cell issues persisted, indicating mainly antibody deficiencies.
  • * Following IGRT, there was a significant reduction in infection rates and hospitalizations, highlighting the importance of immunological assessment in pediatric patients with rare syndromes.
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The short arm of chromosome 16 and especially the region 16p13.11 is a chromosome region where many structural variants, especially deletions and duplications, can be observed. Although deletions of this region are clinically well defined, duplications are rare, and so far, there is no established clinical consensus in regard with its clinical picture, and especially the dysmorphic perspective of the disease is far from being clear.

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Familial Mediterranean fever (FMF) is a monogenic autoinflammatory disorder with recurrent fever, abdominal pain, serositis, articular manifestations, erysipelas-like erythema, and renal complications as its main features. Caused by the mutations in the MEditerranean FeVer (MEFV) gene, it mainly affects people of Mediterranean descent with a higher incidence in the Turkish, Jewish, Arabic, and Armenian populations. As our understanding of FMF improves, it becomes clearer that we are facing with a more complex picture of FMF with respect to its pathogenesis, penetrance, variant type (gain-of-function vs.

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Chronic myelogenous leukemia (CML) is a myeloproliferative neoplasm caused by a translocation between the breakpoint cluster region (BCR) and Abelson murine leukemia 1 (ABL1) genes. Tyrosine kinase inhibitors (TKIs) are used in the treatment of CML. TKIs, bind the ABL1 kinase domain of hybrid BCR-ABL1 protein and inhibit its function.

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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.

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Cystic fibrosis is a chronic multisystemic disease originating from functional alterations in CFTR (cystic fibrosis transmembrane conductance regulator) protein. To date, more than 300 pathogenic variants have been described in the literature. However, the diagnosis of CF, which was thought to become easier after the gene was identified, became more complicated due to the enormous amount of variations.

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Article Synopsis
  • The study investigated the relationship between specific eNOS gene polymorphisms and ischemic stroke in the Anatolian population, involving 112 stroke patients and 160 controls.
  • Researchers used real-time polymerase chain reaction (RT-PCR) to analyze genetic variations and compared the frequency of alleles and genotypes between the groups.
  • Results showed no significant link for the G894T and T786C polymorphisms with stroke risk, but the intron 4 VNTR polymorphism was associated with a higher stroke risk in patients.
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Background: Klinefelter syndrome(KS), affecting 1 in 500-1,000 newborn males, is the most common sex chromosome aneuploidy among males with primary hypogonadism. Isochromosome Xq on the other hand is a rare variant of Klinefelter syndrome, accounting approximately 0.3% of all KS and associated with normal height and androgenisation compared to classical KS.

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Article Synopsis
  • * The study investigates the role of variations in the NAT2 gene, which helps metabolize drugs and toxins, in relation to psoriasis susceptibility by comparing 260 psoriasis patients to 200 healthy controls.
  • * Findings show no significant differences in NAT2 gene variations between the two groups; however, certain polymorphisms are linked to earlier onset age and increased severity of psoriasis in those affected.
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Purpose: To identify the ocular features of children diagnosed as having 22q11.2 deletion syndrome in a Turkish population, which is the most common microdeletion syndrome with a wide range of facial and ocular abnormalities.

Methods: Sixteen children aged between 4 months and 18 years with a microdeletion in chromosome 22q11.

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Background: The diagnosis of 22q11.2 deletion syndrome depends on a time-consuming and expensive method, fluorescence in situ hybridisation (FISH).

Objectives: We aimed to determine new parameters which can aid for in the diagnosis of 22q11.

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Development of the human nervous system involves complex interactions among fundamental cellular processes and requires a multitude of genes, many of which remain to be associated with human disease. We applied whole exome sequencing to 128 mostly consanguineous families with neurogenetic disorders that often included brain malformations. Rare variant analyses for both single nucleotide variant (SNV) and copy number variant (CNV) alleles allowed for identification of 45 novel variants in 43 known disease genes, 41 candidate genes, and CNVs in 10 families, with an overall potential molecular cause identified in >85% of families studied.

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This article reports on the ophthalmological features of four Turkish children with GAPO syndrome, a very rare autosomal recessive condition characterized by growth retardation (G), alopecia (A), pseudoanodontia (P) (failure of tooth eruption), and optic atrophy (O). The children were from two unrelated families born to consanguineous parents. They had the characteristic facial appearance of alopecia, rarefaction of eyebrows and eyelashes, frontal bossing, high forehead, midfacial hypoplasia, hypertelorism, and thickened eyelids and lips.

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Objective: The object of study was to investigate the status of c-MYC oncogene in primary acquired cholesteatoma.

Study Design: Descriptive study.

Methods: Cholesteatoma samples were obtained from 15 patients with primary acquired cholesteatoma during surgical operation.

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The immunodeficiency, centromeric instability, and facial anomalies (ICF) syndrome is a rare autosomal recessive disorder characterized by variable immunodeficiency, instability of the pericentromeric heterochromatin, and facial dysmorphism. Here we report a new case of ICF syndrome who died of rubella pneumonitis. A six year-old-girl who was the first child of consanguineous parents was admitted to the hospital because of bronchopneumonia.

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Objective: To investigate the incidence of chromosome 8 aneuploidy in acquired cholesteatoma.

Material And Method: Cholesteatoma tissue and postauricular skin as a control were surgically obtained from 12 patients with acquired cholesteatoma. Fluorescence in situ hybridization (FISH) analysis using a chromosome 8-specific alpha-satellite DNA probe was performed on the interphase nuclei.

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