Yazar "Çim, Abdullah" seçeneğine göre listele
Listeleniyor 1 - 6 / 6
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe BDNF and NGF gene polymorphisms and urine BDNF–NGF levels in children with primary monosymptomatic nocturnal enuresis(Elsevier Ltd, 2019) Ece, Aydın; Coşkun, Salih; Şahin, Cahit; Tan, İlhan; Karabel, Duran; Çim, AbdullahIntroduction: The pathophysiology and genetic influences in nocturnal enuresis have not been fully elucidated. Delayed neuronal maturation has been suggested as a pathogenetic mechanism in primary monosymptomatic nocturnal enuresis (PMNE). Brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) are neurotrophins affecting maturation of the nervous system. Objective: The aim of this preliminary study was to investigate BDNF and NGF gene polymorphisms and urine levels of BDNF and NGF in children with PMNE as a first time. Study design: The single-nucleotide polymorphisms of BDNF (rs6265:G > A:Val66Met; rs8192466:C > T:Thr2Ile) and NGF (rs6330:C > T:Ala35Val, rs11466112:C > T:Arg221Trp) were investigated by comparing 104 children with PMNE and 140 healthy control subjects. Children with non-PMNE were excluded. DNA isolation and detection of polymorphisms were performed by real-time polymerase chain reaction. In addition, urine BDNF and NGF levels of 47 PMNE and 29 healthy children were measured by enzyme-linked immunosorbent assay method and normalized to urine creatinine (Cr) concentration for comparisons. Results: There were no differences in genotype and allele frequencies of BDNF rs6265 and NGF rs6330 polymorphisms between patients with PMNE and the control group (P > 0.05). No mutant alleles were found in BDNF rs8192466 and NGF rs11466112 polymorphisms in either group. Children with PMNE had higher urine BDNF/Cr (0.020 ± 0.010 vs 0.010 ± 0.002; P = 0.008) and NGF/Cr ratio (3.01 ± 1.87 pg/mg vs 1.77 ± 0.26 pg/mg; P = 0.002) compared with the control subjects. However, no significant differences were found in BDNF/Cr and NGF/Cr values between GG, GA, and AA genotypes of BDNF rs6265 polymorphism and CC and CT genotypes of NGF rs6330 polymorphism (P > 0.05). Discussion: In this study, no association of BDNF and NGF gene polymorphisms with PMNE was found, and urine neurotrophin concentrations were not directly influenced by investigated polymorphisms. Although, previously increased urine neurotrophin secretion has been found in detrusor overactivity, bladder inflammation, and dysfunctional voiding, this preliminary results also showed an increase in neurotrophins in PMNE. Higher urine neurotrophin levels may be related to delayed and continued neuronal maturation or increased production of neurotrophins in the bladder. The increased urine neurotrophins in PMNE may be an indicator of increased sensory nerve excitability of the bladder, contributing to the development of enuresis. Conclusion: This study showed that investigated neurotrophin gene polymorphisms did not make a significant contribution to the development of PMNE, but urine levels of neurotrophin gene products were higher in PMNE. Owing to the complexity and heterogeneity of genotype–phenotype relationships in enuresis, further studies are needed in PMNE.Öğe Boy kısalığı ile başvuran noonan sendromlu bir olgu(Türkiye Klinikleri, 2016) Ünal, Edip; Yıldırım, Ruken; Erten, Özlem; Çim, Abdullah; Haspolat, Yusuf KenanNoonan sendromu (NS); boy kısalığı, konjenital kalp defektleri, iskelet anomalileri ve yeleboyun ile karakterize genetik bir hastalıktır. Ayrıca kanama diyatezi, ekdodermal anomaliler, len-fatik displazi, inmemiş testis ve kognitif fonksiyonlarda bozulma gibi birçok sistemi de etkilediği bi-linmektedir. Bu çalışmada NS tanısı konulan ve büyüme hormon tedavisi başlanan bir olgusunulmuştur.Öğe Elevated levels of tissue plasminogen activator and E-selectin in male children with autism spectrum disorder(Wiley-Blackwell, 2016) Şimşek, Şeref; Çetin, İhsan; Çim, Abdullah; Kaya, Savaș; 0000-0001-9568-5767Although the etiopathology of autism spectrum disorder (ASD) is not clear, immune dysfunction has been proposed as a mechanism for the pathophysiology of ASD. The purpose of this study is to examine serum levels of tissue plasminogen activator (t-PA) and some adhesion molecules in children with ASD that have not been investigated previously in detail. The study group included 35 male children aged from 2 to 9 diagnosed with ASD according to DSM-V criteria. Soluble platelet endothelial adhesion molecule-1 (sPECAM-1), P-selectin, E-selectin, and t-PA in the serum were determined with enzyme-linked immunosorbent assay. Autism behavior check list (ABC) is used for the assessment of ASD severity. The levels of t-PA (P=0.025) and E-selectin (P=0.007) was detected significantly higher in children with ASD than control group. Serum levels of sPECAM-1 showed statistically significant negative correlation with sensory, body and object-use, language, social, and self-help and total scores in the patient group (r=-0.349, P=0.04; r=-0.411, P=0.01; r=-0.412, P=0.01; r=-0.417, P=0.01, and r=-0.531, P<0.01, respectively). Serum levels of P-selectin levels showed statistically significant negative correlation with ABC total score in the patient group (r=-0.378, P=0.03). It may be suggested that t-PA, E-selectin, P-selectin, and sPECAM-1 a crucial role in inflammatory conditions in children with ASD. Autism Res2016, 9: 1241-1247. (c) 2016 International Society for Autism Research, Wiley Periodicals, Inc.Öğe In vivo studies on non-viral transdifferentiation of liver cells towards pancreatic β cells(2012) Çim, Abdullah; Sawyer, Greta Jane; Zhang, Xiaohong; Su, Haibin; Collins, Louise; Jones, Peter; Antoniou, MichaelTransdifferentiation in vivo is an attractive option for autologous replacement of pancreatic ? cells in patients with type 1 diabetes. It has been achieved by adenoviral delivery of genes for transcription factors in the liver and pancreas of hyperglycaemic mice. However, these viral approaches are not clinically applicable. We used the hydrodynamic approach to deliver genes Pdx1, Ngn3 (Neurog3) and MafA singly and in combination to livers of normoglycaemic rats. Five expression plasmids were evaluated. Livers were removed 1, 3, 7, 14 and 28 days after gene delivery and assayed by quantitative PCR, semi-quantitative PCR and immunohistology. Functional studies on hyperglycaemic rats were performed. The highest and most sustained expression was from a CpG-depleted plasmid (pCpG) and a plasmid with an in-frame scaffold/matrix attachment region ((pEPI(CMV)). When Pdx1, Ngn3 and MafA were delivered together to normoglycaemic rats with these plasmids, insulin mRNA was detected at all time points and was ~50-fold higher with pCpG. Insulin mRNA content of livers at days 3 and 7 was equivalent to that of a pancreas, with scattered insulin-positive cells detected by immunohistology, but levels declined thereafter. Prohormone convertase 1/3 was elevated at days 3 and 7. In hyperglycaemic rats, fasting blood glucose was lower at days 1, 3 and 7 but not thereafter, and body weight was maintained to day 28. We conclude that hydrodynamic gene delivery of multiple transcription factors to rat liver can initiate transdifferentiation to pancreatic ? cells, but the process is reversible and probably requires more sustained transcription factor expression.Öğe Pompe disease: A case report(Dicle Üniversitesi Tıp Fakültesi, 2015) Çim, Abdullah; Coşkun, Salih; Yılmaz, Ahmet; Onay, HüseyinPompe disease is inherited in an autosomal recessive manner, and is usually observed in the children of asymptomatic carriers. Pompe disease, known as Glycogen Storage Disorder type II, is caused by pathogenic mutations in the gene encoding lysosomal acid alpha-glucosidase (GAA). There are three types of Pompe disease: classical infantile form, non-classical infantile form and late-onset Pompe disease. Age of onset and severity of the disease determine the type of Pompe disease. We aimed to identify a mutation in GAA gene in parents who were first cousins and their baby girl was passed away due to the Pompe disease. The baby girl had reduced acid alpha-glucosidase activity, but genetic analysis had not been performed. Mutation analysis of parents was performed using high-throughput DNA sequencing method. Heterozygous mutation of c.896 T>C in exon 5 was found in parents, and prenatal diagnosis was performed for their next pregnancy. In conclusion, c.896 T>C substitution in GAA gene may lead to the severe type of Pompe disease. Using a relatively fast and reliable molecular genetic analysis method to confirm the early diagnosis of the Pompe disease is important for the management of the disease.Öğe Serum cytokine profiles of children with obsessive-compulsive disorder shows the evidence of autoimmunity(Oxford University Press, 2016) Şimşek, Şeref; Yüksel, Tuǧba; Çim, Abdullah; Kaya, SavaşBackground: Previous reports have described an association between autoimmunity and primary obsessive compulsive disorder. This study aimed to investigate any differences in the levels of T helper 1, 2, and 17 effector cell cytokines between obsessive compulsive disorder patients and the control group. Methods: The study included 34 children (23 males, 11 females), aged between 7 and 17 years, with a diagnosis of obsessive compulsive disorder prior to receiving treatment. The control group consisted of age- and gender-matched children. Study participants were assessed using the Kiddie Schedule for Affective Disorders and Schizophrenia, Present and Lifetime version, Children's Yale Brown Obsession Compulsion Scale, and Children's Depression Inventory. Cytokine serum concentrations were measured using the BD Cytometric Bead Array Human Th1/Th2/Th17 Cytokine Kit. Results: Interleukin-17A, tumor necrosis factor-α, and interleukin-2 levels were significantly higher in obsessive compulsive disorder patients, However, there was no correlation between T helper 1 and 17 cytokine profiles in the obsessive compulsive disorder group. The duration and severity of obsessive compulsive disorder symptoms were not significantly associated with interleukin-17A, interferon-gamma-γ, interleukin-10, interleukin-6, interleukin-4, and interleukin-2 levels. Interestingly, a negative correlation was found between tumor necrosis factor-α levels and Clinical Global Impression scores. Conclusions: These findings suggest, in some cases, obsessive compulsive disorder may develop on a background of autoimmunity, and interleukin-2, tumor necrosis factor-α, and interleukin-17A may play a role in these autoimmune processes. Therefore, we believe it is important to investigate for obsessive compulsive disorder symptoms in patients with autoimmune disease and, conversely, autoimmune diseases in obsessive compulsive disorder patients.
