Publications by authors named "Davut Gul"

Article Synopsis
  • - Neurodevelopmental disorders (NDDs) affect over 3% of the population, posing significant social and economic challenges; despite advances in genomics, many cases remain undiagnosed.
  • - A study of 234 new subjects and 20 previously unsolved Turkish families used genome-wide screening, identifying clear genetic causes in 75.2% of families, with 218 distinct genes linked to these disorders.
  • - Notably, 28.9% of solved families exhibited multilocus pathogenic variations, often due to identical-by-descent segments in their genomes; additional sequencing helped achieve diagnoses in 25% of previously undiagnosed families.
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Inspired by shape-shifting features of slime mould growth, we implement a computational algorithm to study the nutrient-induced pattern formation and transition of slime mould. We then translate the learned principles into the design and characterization of cellular materials, with particular focus on the issue of spatial heterogeneity due to the nature of the non-uniform, asymmetric pattern. Guided by clustering analysis, compression tests on 3D-printed samples, and numerical simulations by finite element models, we were able to categorize patterns with certain geometric features (such as layout and symmetry) and found similar mechanical response features, indicating high tailorability of non-uniform architected materials.

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Arthrogryposis is a clinical finding that is present either as a feature of a neuromuscular condition or as part of a systemic disease in over 400 Mendelian conditions. The underlying molecular etiology remains largely unknown because of genetic and phenotypic heterogeneity. We applied exome sequencing (ES) in a cohort of 89 families with the clinical sign of arthrogryposis.

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Galloway-Mowat syndrome (GMS) is an autosomal recessive disorder with a poor prognosis that was first defined as a triad of central nervous system involvement, hiatal hernia, and nephrotic syndrome. However, this syndrome is now known to have a heterogeneous clinical presentation. The nephrotic syndrome is steroid resistant and is responsible for the outcome.

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Article Synopsis
  • * Researchers analyzed height and weight data from 842 TS patients under 18 years old before they started any treatment, calculating growth percentiles for different age groups.
  • * The resulting national growth charts will help monitor and manage growth in Turkish girls with TS, aiding in their treatment with growth-promoting therapies.
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To evaluate the anthropometric features of girls with Turner syndrome (TS) at birth and presentation and the effect of karyotype on these parameters. Data were collected from 842 patients with TS from 35 different centers, who were followed-up between 1984 and 2014 and whose diagnosis age ranged from birth to 18 years. Of the 842 patients, 122 girls who received growth hormone, estrogen or oxandrolone were excluded, and 720 girls were included in the study.

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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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Objective: Turner syndrome (TS) is a chromosomal disorder caused by complete or partial X chromosome monosomy that manifests various clinical features depending on the karyotype and on the genetic background of affected girls. This study aimed to systematically investigate the key clinical features of TS in relationship to karyotype in a large pediatric Turkish patient population.

Methods: Our retrospective study included 842 karyotype-proven TS patients aged 0-18 years who were evaluated in 35 different centers in Turkey in the years 2013-2014.

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Blau syndrome is a rare, autosomal dominant, granulomatous autoinflammatory disease. The classic triad of the disease includes recurrent uveitis, granulomatous dermatitis, and symmetrical arthritis. Blau syndrome is related to mutations located at the 16q12.

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Objective: Gouty arthritis and familial Mediterranean fever (FMF) share some clinical and pathological features such as being classified as auto inflammatory disease, association with inflammasome, short-lived intermittent arthritis, and good response to colchicine and anti-interleukin-1 treatments. As Mediterranean fever (MEFV) gene is the causative factor of FMF, we aimed to investigate the prevalence of MEFV gene mutations and their effect on disease manifestations in Turkish gouty arthritis patients.

Methods: Ninety-seven patients diagnosed with primary gouty arthritis (93M and 4 F, 54 [37-84] years) and 100 healthy controls (94M and 6 F, 57 [37-86] years) included in the study.

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Heterotopic brain tissue (HBT) most commonly occurs in the nasal region and it is often referred to as a nasal glioma. Nonnasal locations for ectopic brain tissue are less commonly described. In English literature, only six cases have been reported that share some features (face or neck location) of this case.

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Aims: We have determined 11-beta-Hydroxysteroid Dehydrogenase Type 1 (HSD11B1) and Hexose-6-Phosphate Dehydrogenase (H6PD) mRNA expression levels in adipose tissues from patients with type 2 diabetes mellitus.

Methods: Six non-diabetic and seven diabetic male patients who undergo elective abdominal surgery were included in the study and visceral and subcutaneous adipose tissue samples were obtained. Fresh preadipocyte cultures were administered to low and high glucose medium (11M and 25M) in vitro for 24h and mRNA extractions were performed.

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Background: Ellis-van Creveld (EvC) syndrome is characterized by short limbs, short ribs, postaxial polydactyly, dysplastic nails and teeth and is inherited in an autosomal recessive pattern. We report a family with complex septal cardiac defects, rhizomelic limb shortening, and polydactyly, without the typical lip, dental, and nail abnormalities of EvC. The phenotype was inherited in an autosomal recessive pattern, with one instance of pseudodominant inheritance.

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Background: Because of resistance to immunosuppressants in nephrotic syndrome and reduction of proteinuria relapses following renal transplantation, it seems that new horizons have arisen from mutational screening of the podocin gene. The aim of this study was to assess electronic microarray screening of the podocin mutation.

Methods: Twelve previously identified podocin mutations were screened by the electronic microarray method in known DNA samples and in patients (aged 5 months-18 years, n = 38) with steroid-resistant primary nephrotic syndrome, isolated proteinuria, end-stage renal disease secondary to idiopathic nephrotic syndrome, and proteinuria relapses following renal transplantation.

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Homocysteine (Hcy) is a sulfur-containing amino acid involved in methionine metabolism. Elevated plasma Hcy concentration is a possible risk factor for vascular disease. Folate and vitamin B-12 are vitamins that are necessary for remethylization of Hcy to methionine.

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Familial Mediterranean fever (FMF) is an autosomal-recessive disease. It is characterized by recurring fever, abdominal pain, and serositis. The Mediterranean fever (MEFV) gene is localized on 16p13.

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Objective: The role of individual genetic differences in susceptibility to systemic inflammatory response syndrome (SIRS) and sepsis is generally unrecognized or underestimated. We investigated the rate of pyrin mutations in critically ill patients with SIRS and sepsis, and compared whether carriers for pyrin mutations are associated with respect to the frequency of and certain features of sepsis and SIRS.

Methods: We tested M694V, M680I, V726A, R761H, and M694I mutations in critically ill patients.

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The cerebro-hepato-renal syndrome of Zellweger is the most severe peroxisome biogenesis disorder. Zellweger syndrome is caused by a disturbance in the peroxisomal protein import machinery and leads to multiple organ defects and death usually within the first year of life. Here we report a 3-month-old girl with Zellweger syndrome who was found to have cysts in the caudothalamic groove on cranial magnetic resonance imaging.

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Auriculo-condylar syndrome is a rare genetic syndrome. The characteristic features of the syndrome are auricular deformity and mandibular hypoplasia. The special auricular deformity is called a question mark ear because of the appearance of the auricle.

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This report presents a case with partial trisomy 18q resulting from de novo unbalanced translocation of chromosomes 15 and 18 displaying the features of pure trisomy. This is the first reported case with partial trisomy 18q due to unbalanced translocation between chromosomes 15 and 18. Clinical findings of our case have been compared with the reported cases' had partial trisomy 18q and the importance to recognize the cases with chromosome abnormalities to give genetic counseling and prenatal diagnosis for subsequent pregnancies has emphasized.

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Acrocallosal syndrome is characterized by agenesis of the corpus callosum, craniofacial anomalies, psychomotor retardation, and polydactyly. The clinical spectrum of this syndrome is broader than previous reports suggest. Five Turkish patients including dizygotic twins are reported.

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